Around the Americas Rotating Header Image Around the Americas
  • Home
  • About Us
    • Our Mission
    • Our Team
    • Our Partners
    • Get Involved
  • Expedition
    • The Route
    • The Crew
    • The Boat
  • Science & Education
    • Science Program
    • Education Program
    • Ocean Conservation
  • Blog
  • Gallery
  • Press
    • Recent Media Coverage
    • For the Media

Posts Tagged ‘weather’

Crew Log 173 – Open Window to the Horn

Jan 23rd, 2010
by Herb McCormick.
3 comments
Get the flash player here: http://www.adobe.com/flashplayer

Open the above photos in a full-screen slideshow in Flickr

January 22, 2010 – Isla Herschel, Chile
By Herb McCormick

Herb's Headshot

It is a place of maritime lore and legend, celebrated in verse and song. The dot on the exclamation point that is South America, it’s the southernmost speck of land associated with the continent, an island unto itself at the southern terminus of the fabled Tierra del Fuego archipelago: South, south, south. It’s been called the Mt. Everest of Sailing, and the list of sailors who’ve sailed long and hard to gaze upon it’s angular edifice is storied and select, and includes such names as Sir Francis Drake, Charles Darwin, Joshua Slocum, Vito Dumas, Bernard Moitessier, Robin Knox-Johnston, and yes, Mark Schrader. It’s the speck on the chart of the vast Southern Ocean at 55º 58’ 47”S by 067º 16’ 18”W, on a hardscrabble slab of rock called Isla Hornes in the Hermite Islands group. It is the one-and-only, the legendary Cape Horn.

And today, Ocean Watch set sail for it.

Just one day after arriving in Puerto Williams, Chile, following an eventful passage from the Falkland Islands – and with two new crewmembers joining the team, Sailors for the Sea founder David Rockefeller, Jr. and fellow co-founder/SFS boardmember David Treadway – the 64-foot cutter set forth on one of the most significant legs of the entire expedition Around the Americas, namely, the rounding of Cape Horn. The crew had arrived with plans to wait for an ideal weather window, but as it turned out, it was a brief pause. David Thoreson is our onboard meteorologist and had been tracking the weather for more than a week. Here’s what he saw:

“As Ocean Watch arrived in Puerto Williams, there appeared to be two small weather windows existing to head south to Cape Horn in northwesterly gales. This has been apparent now for the last few days but the problem then becomes, ‘What next?’

“This question develops because of the tremendous west to east directional air flow and this week is no exception with gales forecasted for four of the six days. Using the gale from the WNW to leave Puerto Williams and head south to an anchorage close to the Isla de la Hornos positions us close enough to then take advantage of a directional change or decrease in pressure.

“Tomorrow afternoon (Saturday) brings a forecasted wind of WNW 10-15 knots on both the east and west sides of the Horn. This is the weather window to take our shot before the south and westerly gales kick right back in overnight.”

In other words, the window was open.

Augustine “Doonie” Edwards and John Kenyon, the skipper and captain, respectively, of the grand, 80-foot ketch, Gloriana, seconded David T’s take on the situation. Doonie, a longtime friend of DR’s, and his sailing master, John, have been plying these waters aboard the Chilean-flagged Swan for decades, and when they confirmed that the window was open, skipper Mark Schrader decided that the time to sail for the Horn was now.

The evening before, on Thursday night, was a big one on Ocean Watch, as we were boarded by a gang of bandanna-clad Chilean pirates known as the Brotherhood of the Coast. Our brothers in the sea were armed with food and drink, and after a merry old time of it, we repaired to Gloriana for a sumptuous dinner. Gloriana, also bound for Cape Horn, set out early this morning, and Ocean Watch followed about an hour later.

We were chasing history.

The first European sailors to lay eyes on the Horn may well have been Drake and his crew. In the fall of 1578, in the course of his epic circumnavigation, Drake sailed through the Strait of Magellan and into the Pacific Ocean. Before he got very far, a vicious northerly filled in and Drake was blown southwards, towards Antarctica. South of Tierra del Fuego, he realized that the archipelago was not another continent, the belief at the time, but a group of islands – including Isla Hornos – bordering an open sea. That open expanse of water between the Horn and Antarctica is today known as Drake Passage, an enduring epitaph for his troubles.

It was almost forty years later, in January of 1616, that the Dutch merchant mariner Willem Schouten set out for the South Atlantic in search of a new route to the Far East. Schouten commanded two ships, the Eendracht and the Hoorn, the latter of which was named for the town from which the voyage began, and which was shipwrecked en route. Eendracht carried forth by herself, and in late January, almost 394 years to the day to the arrival of Ocean Watch, Schouten found what he’d been looking for. This excerpt from the ship’s log tells the story:

“In the evening 25 January 1616 the winde was South West, and that night wee went South with great waves or billowes out of the southwest, and very blew water, whereby wee judged, and held for certaine that…it was the great South Sea, whereat we were exceeding glad to thinke that wee had discovered a way, which until that time, was unknowne to men, as afterward wee found it to be true.

“On 29 January 1616 we saw land againe lying north west and north northwest from us, which was the land that lay South from the straights of Magelan which reacheth Southward, all high hillie lande covered over with snow, ending with a sharpe point which wee called Kaap Hoorn (Cape Horn)…”

For scores of years afterwards, especially through the Great Age of Sail from the 1700s to the early 1900s, Cape Horn was a significant waypoint on the well-traveled clipper routes, for the grand square-riggers that carried much of the world’s trade. The hard men who drove those ships were called Cape Horners, and the last thing they needed to know how to do was swim. For if they went overboard, especially in the gargantuan seas and relentless westerly winds that spin unimpeded around the bottom of the globe, no one was going to risk their own lives turning around to get them.

The first “yachtsman” to sail these waters was the crusty solo sailor Joshua Slocum, who was the first man to sail around the world alone and visited Tierra del Fuego – where he famously scattered carpet tacks across his deck to dissuade the natives from boarding – in 1895. But it’s unclear if Slocum actually rounded Cape Horn.

There is no doubt, however, about Conor O’Brien, who successfully negotiated Cape Horn aboard his 42-foot Saoirse in the early 1920s. The great Argentine navigator, Vito Dumas, was the first man to sail around the world alone via the Horn, in 1942; British legend Robin Knox-Johnston was the first to accomplish the feat without stopping when he won the deadly Golden Globe Race in the late 1960s. No one ever did a better job of romanticizing the place than Frenchman Bernard Moitissier, who rounded it twice and wrote a pair of books about the experience that inspired generations of young French adventurers to follow in his seaboots. Our own Mark Schrader was the first American to circle the planet via the five great southern capes – including you know which – in 1982.

Today, he had plenty of company: a crew of eight, our biggest since leaving Seattle last May.

When we dropped our mooring off Puerto Williams, after clearing customs and registering our itinerary with the Chilean Armada, the plan was to sail roughly ninety miles south to a small island just north of Isla Hornos called Isla Herschel. On the northwest flank of Herschel, off an enclosed body of water called Bahia Arquistade, is a protected anchorage called Caleta Martial.

There was good breeze pumping down the narrow Beagle Channel, the boundaries of which were lined by a string of rolling mountains whose caps were patched with snow. DR said the Channel and the peaks reminded him of Juneau, Alaska, and he was right. It was windy, perhaps 25-knots, but out of the right direction, funneling over Ocean Watch’s transom. But it was about to get windier.

Isla Navarino is the major island in this section of the archipelago, and before too long

Ocean Watch slid inside Isla Picton and through a pair of passes, Paso Picton and Paso Goree. By now the breeze was starting to pump into the mid-30s, with gusts to 40-knots. Sailing under staysail alone, Ocean Watch was making good progress, but soon even the tiny headsail was too much, and the skipper called for a change down to the storm staysail. Dolphins frolicked in the bow wave, albatrosses spun and twirled, and groups of Magellanic penguins popped up alongside to pay their respects.

But it was about to get windier still.

Out from the lee of Navarino and into the expansive bay called Bahia Nassau, the breeze really started to pipe, locked into the high 30s with gusts well above 40-knots. Ocean Watch plowed through wave after wave and and gray water continuously swept her decks, but she’s proven to us time and again in our travels that she revels in such conditions, and every time she was drenched in a torrent of ocean, she just shook herself off and kept right on going.

It was wet and wild, but appropriate, too. Sailing to Cape Horn isn’t supposed to be easy.

But then it got more difficult.

As we neared the islands they appeared out of the mist and rain, as one small weather cell after another raked the seas…and, of course, Ocean Watch. Powerful puffs of wind screamed down the faces of the jagged islands – williwaws – whipping the water into a marbled, streaky, frothy tempest, and sometimes even spinning up small, isolated, funnels, just to keep things interesting. Between breaks in the squalls, low rainbows cascaded along the horizon, disappearing when the rain made its encore. It was now gusting into the 50s, perhaps even the 60s, certainly the most wind we’ve seen in 18,000 miles of sailing. Now it was too much for even the storm staysail. Down it came, with water cascading over the foredeck.

Then, finally, we slipped into Bahia Arquistada, and there just ahead, was Gloriana, riding on two anchors, still and steady, pretty as a picture.

There was an empty Navy mooring nearby and Dave Logan skillfully nestled Ocean Watch alongside it so we could run a pair of thick lines through the pad eye. Suddenly it was over: shelter from the storm. Cape Horn was less than ten miles south.

Cape Horn.

In his excellent book, Rounding the Horn, writer Dallas Murphy captured something of the sense of what we’re feeling today aboard Ocean Watch:

“All mariners since Magellan have recognized that when their bows crossed the Fortieth Parallel, they were entering an ocean entirely different from all the rest,” writes Murphy. “Everything was exaggerated, accelerated in the ‘Roaring Forties’ and the ‘Screaming Fifties.’ Big wind came on harder, faster, than any other oceans…

“Even the look of the Southern Ocean was different from the rest, gray, grim, death colors. But there were also those explosions of light when for a time, the low murk parted and shafts of splendid brightness shone on the white crests like a hint of hope, and sometimes multiple rainbows arced across the horizon, intersecting. The fatigue, pain and danger were all magnified, but so, too, was the magnificence of this ocean, its wildness. With each degree of south latitude, through the forties into the fifties, down to the Horn at nearly 56 South and beyond, the conditions inevitably worsened. Cape Horn sailors had a saying for it:

“Below 40 South there is no law,

“Below 50 South, there is no god.”

This afternoon, however, tucked behind an island at the end of the planet and at the doorstep of Cape Horn, there was Ocean Watch.

- Herb McCormick with photographs by David Thoreson

*This crew log submitted by Iridium OpenPort and Stratos

*To add a comment to this story click on the comment link below the post title. Please direct personal messages for the crew to crew@aroundtheamericas.org instead of submitting them here. Thanks for following the Around the Americas Expedition.

Crew Log 171 – Getting Strait

Jan 20th, 2010
by Herb McCormick.
1 comment
Get the flash player here: http://www.adobe.com/flashplayer

January 20, 2010 – Bahia Aguirre, Argentina
By Herb McCormick

Herb's Headshot

At 0300 today, 3 a.m. in the morning, the first purplish hint of dawn was visible to the southeast, and the looming, inaugural presence of Isla de los Estados – Staten Island – was cloaked in shadowy mist to the northwest. Here and there: light and land. For the crew of Ocean Watch, it was the start of a long day, and an important one. It was the day we’d cross under the Strait of Le Maire, enter the Beagle Channel, and begin the task of negotiating what had been one of the express goals of the Around the Americas expedition – one of the primary points of the entire exercise – since leaving Seattle last May. Namely, it was the real, honest-to-goodness start to a rounding of Cape Horn.

But first we had to “get strait.” In other words, we needed to get beyond the short, narrow, and potentially highly hostile Strait of Le Maire, the 16-nautical mile entranceway to the wonders of Tierra del Fuego and beyond.

Isla de los Estados, or Staten Island, was given its name by the Dutch merchant mariner Willem Schouten, master of a ship called Eeendracht, in 1616, who named the isle and the surrounding territory Her Staten Land (literally: the Land of their Lords) after his sovereign patrons and benefactors. (One can assume the New York City borough that shares the title was tagged for similar reasons.) Likewise, the Strait of Le Maire was named for another backer of the same expedition, ship owner Isaac Le Maire. Schouten will also go down in history as the man who gave Cape Horn its handle: the Hoorn was one of the ships in his armada, and was also the name of the town from which he’d departed eight months before.

But Cape Horn is still on the figurative horizon, whereas Staten Island was right there off the bow.

We’d made pretty fair time on the trip from East Falkland Island to the eastern flank of Staten, but that was about to end. By 0430, we were pounding dead upwind in a sneaky westerly of 30-knots; bucking a foul current of a half-knot or more; and making just over three knots through the water and two-something over the ground. We passed beneath a big, dark cloud and the breeze eased somewhat, but the numbers still weren’t famous – 4’s and 5’s through the water, 3’s and 4’s on velocity made good (VMG).

Yes, it was the beginning of a very long day.

Skipper Mark Schrader and mate Dave Logan had concocted a plan to hug the southern shore of Staten, relatively speaking, as opposed to sailing around the more exposed northern shoreline. The immediate upshot was that we got a good, close look at the 33-mile long island in the emerging morning light.

“Craggy,” said Logan. I was thinking more along the lines of “saw-toothed,” but you get the idea. By whatever description, there was a good bit more elevation compared to our most recent visuals at East Falkland; on the chart, we identified a peak of some 2,500 feet, but it had yet to peek out from the clouds. In any event, compared to Stanley, we were now in the Himalayas. The bad news was, we weren’t making much headway towards the Strait (which, technically speaking, we weren’t sailing “through,” but just to its south). The good news was, at least we had something to check out, even if the view wasn’t changing very fast.

Still, looking at the bright side, it was getting brighter out. I mentioned to Logan that pounding to weather in 30 knots in sunshine is better than pounding to weather in 30 knots in rain.

He answered, rather obliquely, “We’re making 3.3 knots against 2.5 knots of current.” Well, yes; anyway, so much for optimism.

Whatever one’s outlook, sunrise was rather spectacular. The reflected light on the jagged mountains cast a rosy hue across their peaks, some of which were flecked with patches of snow. Our latest crewmember is Sailors for the Sea boardmember Ned Cabot, who has sailed his own yacht, a J/46 called Cielita, across the Atlantic and into the high latitudes. Staten Island reminded him of certain ranges in Western Newfoundland, also around the 50th parallel, in the Northern Hemisphere summer.

“If it wasn’t for the fact we weren’t moving, I’d think this was kind of pretty,” he said. “I think I’ll go get my camera to cheer me up.”

Yesterday, while poring over the charts, Mark had looked at our next port of call in Puerto Williams, Chile, and said, “We’ve got a very interesting 150 miles ahead.” We were now just over halfway there. Extremely short, steep, breaking waves were foaming all around Ocean Watch. The deck was awash, awesome sheets of spray were flying over the boat, and solid walls of water were crashing into the windshield of the hard dodger. The motion down below was horrendous. At 0600, at the change of watch, I fell into my pitching bunk, thinking it must be what it feels like to go over Niagara Falls in a barrel. It was all so interesting, in fact, that I was reminded of that old Chinese proverb: “May you live in interesting times.” I’ve been told it’s actually a curse, not a blessing.

Interesting.

Three hours later, I blinked awake after my longest snooze since leaving the Falklands. Sometimes on a passage you need a watch change to change the energy. But there was more than a psychic change here: It was calm.

David Thoreson was at the nav station studying the computer, and summed up the situation succinctly: “No wind. But it’s coming.” He pointed at the Strait. “Right here. Right about the time we get there.”

On another screen he’d called up the forecast from www.buoyweather.com. At that precise moment, the prediction was spot on: “Light winds with a slight chop. Small short-period waves. Winds: NNW 9 to 12 knots. Seas: WNW 4 feet @ 6 seconds.”

It was the afternoon report that was troublesome: “Gale warning with dangerous seas. Small craft advisory. Use extreme caution. Moderate short-period wind waves. Winds: NNW 27 to 36 knots. Seas: NNW 6 feet @ 5 seconds.”

In the still conditions, Staten was an arresting visage; tiny penguins of a variety we hadn’t seen before bobbed in and out of the water, while our new friends, the albatrosses, were everywhere in sight. David correctly noted that it looked like a wild place to explore. “The climbing and hiking would be pretty rugged,” he said. “First ascents. Big walls. But how do you get there?” The safe anchorages that do exist, we knew, were on the northern side of Staten, nowhere in sight.

David explained that while I was sleeping they’d cut inside a trio of rocky outcroppings right at the moment our ever-reliable Lugger diesel showed slight signs of overheating. They’d shut it down and sailed out of trouble while Logan worked his magic and got it purring once again. All was well: we’d just lost some valuable time.

“We were hoping we’d be across by now,” said David. “We were one oomph short.”

Back on deck, the sky to the west was beginning to look bleak. The barometer was falling, now registering a low 991 millibars. But we could see the end of west Staten Island – it looked like a mini Cape Horn – and a gray promontory farther beyond.

“There’s the other side,” said David. “The Beagle Channel. Tierra del Fuego. Let’s get there.”

By 1115, with breath bated, we were clear of Staten Island and finally getting into the Strait.

Once out of the lee of Staten, we unrolled the jib and stuck our toe in. The wind was building but from a good direction, to the north of west, permitting a fast reach. About a third of the way across, the breeze had risen into the mid-20s and we were careening along at a somewhat frantic 10-knots, so we rolled up the genoa in what was now a cold rain and replaced it with the staysail. We were, as we’re wont to say here on Ocean Watch, hauling the mail.

For most of the trip across the Strait, a big cell of precipitation that hovered right over us followed our track. On the radar screen, it was bright yellow and symmetrical, and looked exactly like the cover of an old Iron Butterfly album. Inna-gada-davida, baby.

Meanwhile, the land to the west – South America! – loomed larger and larger. “An hour and ten minutes to go,” said Logan. “Fifty minutes to the forecast gale,” said Ned. “If we make it out of here in this…” said the skipper, letting the thought dangle for a moment, and then, “…I’ll be quite pleased.”

An hour later, I was down in the cabin with Mark when David’s head appeared in the companionway. “A couple of shots of breeze rolling down the coast,” he said. “Just an FYI.”

Seconds later, the boat lurched on its side and I had to grab my computer before it flew off the table. “Third reef!” called David.

Down went the staysail, in went the third reef in the main. On deck, the breeze was now in the mid-30s, the air was cold and wet. The well-known Patagonian williwaws, powerful gusts of wind that rocket down the face of the steep mountains were coursing down the channel just as we tucked out of the Strait of Le Maire and into the shadow of the peninsula. We’d just sailed south of 55º S. “One way or the other, we were going to get our gale,” said David.

The last hour, naturally, was the wildest. A Force 9 gale came pummeling down the channel, blowing the tops of waves sideways in estimated gusts of 50-knots, the most breeze we’d seen in seven months and 18,000 miles of sailing. We yanked down the main and made for a deep cove recommended by seasoned Patagonia cruisers David and Candy Masters, who we met in the Falklands. In the small-world department, the Masters had sailed their purposeful 46-ketch, Endeavor, all the way from – where else? – Seattle.

We had one last bit of drama when the engine again sputtered and coughed, but the skipper and mate changed the fuel filter on the fly and Ocean Watch was again a seriously going concern. At the end of the day, literally, the sun broke through, revealing a vast, arresting landscape of hills and estancias, as we motored into the bay, escorted by a quartet of dolphins. Sweet.

For every one of the four permanent crew on the boat – Mark, Dave, David and I – we were returning to a place where he had some personal history, a place we weren’t sure we’d ever see again. David T summed up it up for all of us: “This is big. I appreciate it more now that I’m older. I’m not so naïve.”

I was hankering for some old Mark Knopfler, some old Dire Straits. It was time for a brief celebration, and it seemed appropriate. On a long, strange, wonderful day, we’d gotten past the dire Straits of Le Maire.

- Herb McCormick with photographs by David Thoreson

This crew log submitted by Iridium OpenPort and Stratos

Crew Log 164 – Status Report

Jan 8th, 2010
by Herb McCormick.
No comments yet
Get the flash player here: http://www.adobe.com/flashplayer

Open the above images full-screen in Flickr

January 8, 2010 – At Sea, 46º 08’S, 057º 38’W
By Herb McCormick

Herb's HeadshotThere are days on almost every long ocean passage when there is nothing special to report, and today, quite happily, is one of those days. The crew of Ocean Watch enjoyed a fast and sometimes peppy night of sailing, running wing-and-wing before breezes that hovered in the 20-25 knot range until the wee hours, when the northwesterly wind began to falter and back to the west. We reset the sails accordingly and continued making good progress to the Falklands on a beam reach through much of the morning before the breeze eased even more and the engine was kicked back over. Still, having now reached the 46th parallel, Ocean Watch has closed to within 350 nautical miles of the Falkland Islands/Islas Malvinas, with an anticipated arrival late this weekend.

By either name, the archipelago just ahead looks like a fascinating destination and a rarely visited cruising ground for long-range voyagers. Both skipper Mark Schrader and first mate Dave Logan have spent much of the afternoon poring over charts and guidebooks for the area in advance of our arrival. “There looks like so many interesting places,” said Logan. “You could spend a year checking it all out.” Our time will be vastly limited, but we’re all eager to have a good look around.

The other notable news to report, after a long stretch with very few wildlife sightings, is the welcome return of sea life along the track. We’ve mentioned the birds, but not the pair of orcas that came slipping past earlier today, or what we can only guess was a basking shark yesterday afternoon. One of the great lures of the Falklands/Malvinas, the guidebooks unanimously agree, is the great variety of critters that wait. Again, we’re ready to check it all out.

On what is clearly a slow news day on Ocean Watch, we’ll take the opportunity to update a couple of climate-related events of note on our route Around the Americas, one behind us, and one ahead.

Though a recent glance at the forecast for Cambridge Bay, in the Northwest Passage above the Arctic Circle – where Ocean Watch was berthed before the final stages of her successful transit of the Passage last summer – showed temperatures hovering at a nippy -20ºF, the National Snow and Ice Date Center (NSIDC) has reported that the November 2009 Northern Hemisphere sea-ice extent was the third lowest since satellite measurements began in 1979. The findings remain consistent with the 2009 summer readings, also the third lowest extent of sea ice in recent history. In ’09, for the record-setting third consecutive summer, every yacht that attempted to negotiate the Northwest Passage was successful. Will the trend continue in 2010? Stay tuned.

Ocean Watch, of course, won’t be in the Arctic to discover the answer firsthand, but it appears the crew will have a different set of meteorological challenges ahead of them. That’s because the National Oceanographic and Atmospheric Administration’s Climate Prediction Center is maintaining an El Niño Advisory for early next year along Ocean Watch’s proposed route up the west coast of South America.

The Australian Bureau of Meteorology has confirmed that “strong El Niño conditions (currently) continue over the tropical Easter Pacific. Ocean temperatures in the area 5º N to 5º S, 120º W to 170º W – also called the Niña 3.4 region, were at 1.6ºC above average on December 15th, just above the 1.5ºC threshold for a strong El Niño.” NOAA states that current conditions and model forecasts favor continued El Niño conditions lasting through the Northern Hemisphere spring of 2010…precisely when Ocean Watch will be sailing along the coasts of Chile, Peru and Ecuador.

An El Niño – the literal translation is “the child” – is a climate event involving equatorial currents that occur roughly every two- to five-years and typically last as long as a year. In an El Niño cycle, the tropical water temperatures in the central and eastern Pacific rise significantly and can wreak havoc on global weather patterns, ocean currents and conditions, and marine fisheries. A typical El Niño weakens the trade winds, increases rainfall over the central Pacific and decreases it in Indonesia. All of these phenomena play roles in El Niño’s effects on worldwide climates and weather.

We’ll be keeping what sailors call a “weather eye” on the Arctic sea ice and the 2010 El Niño in the weeks and months ahead. But first things first: It’s time to make hay for the Falklands.

- Herb McCormick with photographs by David Thoreson

This crew log submitted by Iridium OpenPort and Stratos

Crew Log 162 – Roaring Forties

Jan 6th, 2010
by Herb McCormick.
No comments yet
Get the flash player here: http://www.adobe.com/flashplayer

January 6, 2010 – At Sea, 40º 22’S, 056º 56’W
By Herb McCormick

Herb's HeadshotLess than twelve hours after leaving Mar del Plata, Argentina, bound for the Falkland/Malvinas Islands, the southwester really kicked in and slapped us upside our silly heads. I came to the complete realization that things were going sideways in a big stinking hurry while sandwiched between skipper Mark Schrader and fellow crew David Thoreson on the pitching, heaving deck of Ocean Watch as the three of us straddled the boom and tied in the third reef point in the mainsail.

It was pretty sporty out.

At that precise moment, David turned to me, and with what I can only describe as a slightly maniacal, rather disturbing grin, said simply, “Welcome to the Roaring Forties.”

Ah yes, the Roaring Forties. Ironically enough, we were still about twenty-miles shy of 40º S. But as the old saying goes, it was close enough for government work.

Today, the crew of Ocean Watch continued south into the teeth of the fabled Roaring Forties, that 600 nautical-mile band of latitude between 40º S and 50º S in the Southern Hemisphere where tightly wound fronts of low pressure roll endlessly on like stampeding herds, spinning the seas into frothy mayhem and leaving the sailors tossed upon them hanging on for dear life.

Ladies and gentlemen, your Roaring Forties!

It’s not like we didn’t know they were coming.

Only yesterday, chatting with the great French sailor Christophe Auguin on a sunny Mar del Plata morning, we learned that just two day before he’d been swathed in fleece and foul-weather gear as he sailed north from the coast of Chile…winterish weather in the Roaring Forties. Also, we’d been tracking the forecast for days, and it was abundantly clear that our course towards the Falklands would intercept with an approaching cold front sometime late Tuesday afternoon or evening. As much as we hoped otherwise, there’d be no way around it.

Still, the first few hours out of Mar del Plata brought delightful sailing, with bright sunshine and a following breeze. But just before six p.m. local time, the sky to the west darkened and we took the opportunity to shorten our mainsail down to the second reef. We didn’t have to wait long before the dramatic, clearly defined, cigar-shaped front was upon us. It was a dozen shades of gray, swirling and alive, beautiful and awesome, scary and imposing.

Welcome to the Roaring Forties.

For a few hours, it was benign enough, but just before midnight, the wind began to whistle and shriek. I was in my cabin, wide awake, when David’s mug appeared at the door: “Mark and I are going to throw in the third reef. Want to run the cockpit?”

I was hoping you’d ask.

It was the beginning of a very, very long night.

The wind instruments aboard Ocean Watch provide wind strengths not only in true and apparent measurements, but also according to the Beaufort Scale, so named for Admiral Sir Francis Beaufort of the Royal Navy, who in 1808 devised a system to grade wind strengths on a scale of Force 1-12 (though it was later extended to Force 17, an apocalyptic event only seen in James Cameron movies). Beaufort’s scale, based largely on visual sightings, was originally conceived to help frigate sailing masters determine how much canvas they could carry. Last night, Ocean Watch sailed into a solid Force 8 gale (winds of 34-40 knots), flirting at times with Force 9 “strong gale” territory (41-47 knots, the top gust we registered).

Here’s what a Force 8 gale looks like in Beaufort Scale terms: “Moderately high waves, longer (periods), edges of crests begin to break into spindrift. Well marked streaks of foam.” And Force 9: “High waves, dense streams of foam. Crests begin to topple, tumble and roll over. Spray may affect visibility.”

Luckily, it was dark out. Then, after a while, inevitably and sadly, it wasn’t.

As always in these matters, dawn was a double-edged sword. Yes, we’d made it though the night without breaking anything, including ourselves. But now, we could actually see what the heck was going on. In fact, the skies had cleared and were blue and sunny – a fair-weather gale – putting everything into sharp focus. And frankly, Sir Beaufort seemed understated.

Then, to top it off, at one point I drew a deep breath, looked at my watchmate, Dave Logan, and said, “I smell smoke.” Logan, of course, is our engineer, and as you might imagine, this comment had the desired effect: It was like I’d struck him with a cattle prod. Luckily, it took only a moment to discover the power adapter for the 12-volt drink cooler in the cockpit – a fitting that looks and works exactly like a car’s cigarette lighter – had been walloped by a wave and shorted out. In the grand scheme of things, it was hardly grand.

There was to all this, in those brief philosophical moments that somehow come forth when frayed nerves are exposed to the raw power of nature, a wild yet serene beauty to the scene: the wayward seas, the piercing light, the striking blue sky (this was what you call a fair-weather gale), the unflappable albatross. And as Wednesday progressed, the breeze settled into the 20-knot range and the seas subsided somewhat. We’d weathered the worst of it.

So, yes, it was a miserable night in the South Atlantic. It’s what you don’t ever want to see and what you came to see, pieces of the whole. It was our first – and surely not our last – taste of the Roaring Forties.

- Herb McCormick with photographs by David Thoreson

This crew log submitted by Iridium OpenPort and Stratos

Crew Log 160 – S. Atlantic Currents: Battling the N. Brazil Current

Dec 29th, 2009
by Dr. Michael Reynolds.
No comments yet
Get the flash player here: http://www.adobe.com/flashplayer
December 29, 2009 – Mar del Plata, Uruguay
By Dr. Michael Reynolds

Michael Reynolds, Ph.D.Background
With apologies, this document is about three weeks late. Ocean Watch is now in the much colder waters of Mar de Plata where the temperature is in the mid 20’s,–that’s in degrees Celsius. In Fahrenheit it is in the upper 70’s ºF. See my note on units below. It is partly cloudy, and the Nuevo Año celebrations are cranking up. Life is good-today.

However, we were not such happy sailors on December 4. We were into probably the most depressing part of the voyage. Those of you who followed our daily situation, especially the courageous daily blogs that Herb and David delivered with a stamina worthy of the best war correspondents, are aware of the situation. Hindsight is the best viewpoint and misery is so quickly forgotten. But this report was written in the heart of the drive to Rio. To fully appreciate it, read this in a sauna.

December 4, 2009. We are currently at 2º-35′S,40º-50′W plowing along the north coast of Brazil. We are trying to progress in a southeast direction along the coast, then round the corner and head south down to Rio. In San Juan we began to hear about the difficulties of this portion of our voyage. The current and winds would likely be against us and the going would be very slow and very uncomfortable. Well, there was nothing to do but press on and so we departed Puerto Rico on November 8. After a short visit to the island nation of St. Lucia, we began the push south and, just as expected, the going was tough. The slow going required a fuel stop and we selected Cayenne, French Guyana as the best option. A visit to this French territory with its good food and pleasant people was fun but put us further behind schedule. On November 22, at 6:30 in the morning we weighed anchor and sailed out for seven very tough days.

In this report I want to give you a picture of our world that week. Herb and Mark have made numerous references to this difficult sailing situation. They talked of the heat, rough seas, and head winds, but my report will talk about the oceanography and might give some insight into the sort of oceanography going on in this little corner of the Atlantic ocean. So, take a breath and dig in. Stay with me for a two-minute course in tropical oceanography and to paraphrase Betty Davis, wear your seat belts; it’s going to be a bumpy ride.

Global Winds
Fig 1. The wind regions if there were no continents. If the Earth were not rotating the heating from the sun would force a single convection cell from the equator to both poles. The rotation forces the flow into smaller cells; the trade wind easterlies, the westerlies, and the polar easterlies. The continents add to the complexity.

Trade Winds Drive the Equatorial Currents (See Fig. 1.)
We begin with the trade winds. In a world without continents, the global wind systems, shown in Fig. 1, is one of the most efficient means of transporting heat from < ;script type=”text/javascript”> // –> the equator where the sun-light is direct to the much colder north and south poles. The rotation of the Earth guides the air flow into cells; the trade winds, the westerlies, and the polar easterlies. The continents complicate things considerably but the basic patterns still exist.

The trade winds are steady winds, about 15-20 knots, that are directed to the equator. In the northern hemisphere they are directed to the south and in the southern hemisphere they are directed to the north. Due to the rotation of the Earth, they tilt to the west in both hemispheres. The resulting wind fields (by convention winds are described by the direction they come from) are the NE trades above the equator and the SE trades below the equator, or simply the Easterlies. In Oceanographic terms “forcing” is the push the winds give to the surface currents. The direction of the forcing is in the direction toward which the wind blows. The trade winds produce a constant westward forcing across all the tropical ocean. Bear in mind, this is all a very general “average” picture of a turbulent fluid field.

The doldrums are a region near the equator where the north and south trade winds converge. North and south of the equator the trade winds flow toward each other and along the way they take up water by evaporation, becoming thick with humidity. When they meet they rise up into the atmosphere and lose their water by precipitation. Therefore the doldrums are the narrow band of towering clouds, squalls, and high humidity. (Actually the trade winds do not meet exactly at the equator, but usually within a few degrees north.) The name doldrums, meaning low spirits, a feeling of boredom or depression, is well suited. The doldrums lie between two and seven degrees north, approximately. Clouds in this region reflect the high humidity and the sudden release of energy that accompanies the rainfall. An example of towering cumulus clouds and an anvil cloud where the tower reaches the stable top of the atmospheric troposphere is given in Fig. 2 (Please refer to main photo above. This photograph was taken at sunset as Ocean Watch makes its way south to the doldrums. The convergence creates towering cumulus clouds that precipitate and grow to the top of the atmosphere.)

The westward wind forcing creates ocean currents called the equatorial currents that flow along the equator to the

Atlantic Tropical Currents
Fig 3. A sketch of the major ocean currents in the central Atlantic Ocean. A red dot shows the location of interest. The system of equatorial currents is well defined in the east and the North Brazil Current, fed from the different south equatorial currents, dominates the west. This current is the primary way surface water is exchanged between the north and south Atlantic Oceans.

west. The two wind-driven equatorial currents push quite a bit of water toward Brazil where it piles up and looks for somewhere to go. One result of the western currents is a thin counter current, the equatorial counter current, that snakes between the north and south equatorial currents.

The equatorial currents meet Brazil (See Fig. 3.)
Most importantly, the North Brazil Current is formed and pushes huge amounts of water northward into the north Atlantic where it joins the Gulf Stream. The North Brazil Current is much smaller than the Gulf Stream, about 1/4 the volume, but it is important because almost all of the exchange of surface water from the southern to the northern hemisphere takes place here. Without the North Brazil current the North Atlantic Ocean would be an almost closed body of water.

Gyres in the current (See Fig. 4.)
Like eddies in a stream, the North Brazil Current, Gulf Stream, and all the other boundary currents often form swirls called rings. Fig. 4 shows the currents we faced leaving Cayenne on November 22. It was not a good picture. A huge ring (also called a gyre) was sitting right in front of us. Currents in the gyre were as high as 4 knots to the north. We considered two choices. Either we could leave Cayenne and turn south to hug the coast and push against the constant 1-2 knot currents or we could try sailing well offshore to the other side of the ring and then catch a ride south. This was a good plan but it required conditions to cooperate.

Ocean Watch Track Currents
Fig 4. Currents during our Cayenne-Sao Luis passage. A large gyre dominates the area. The current direction in the gyre is clockwise. The plan for as Ocean Watch was to go well offshore and into the low velocity core then turn south and catch the south currents. East winds and slower than expected going force a compromise to the plan then a dive into Sao Luis. The current map is a product of the University of Miami called HYCOM. It is available for any location through http://buoyweather.com.

No help from the winds
Such was not the case. Fig. 4 shows our location each day from November 22 to November 29. Winds seldom allowed good sailing. Instead of the nice NE trade winds we expected and hoped for, we faced winds that were almost directly from east or even southeast. Do you remember I said above that the doldrums, the place where the north and south trades converge is just above the equator? It so happens this line was almost exactly at 3 degrees N. As a result our tack out was depressing (the doldrums), gray, thick with squalls and dotted with severe wind shifts. Head winds prevented any pure sailing except for short durations. Fuel was low. We were in the middle of nowhere. It was time to head to a port and so on November 29 we entered the harbor of Itaqui.

Around the horn with a new plan
We left Itaqui, the port for Sao Luis, Brazil on December 1. This time we had a different plan. We would sail as close to the coast as possible. There was no secret for escaping this situation altogether — we had to choose the better of bad options. We ended up heading in a SE direction into SE winds and NE currents. Southbound boaters to Rio, beware the North Brazil Current.

Michael Reynolds, Ph.D.
michael@rmrco.com
Remember: all views, ideas, and comments here are ad hoc, off the cuff, minimally researched, and subject to revision at any moment.
Reference for Figures 1 & 3.
Regional Oceanography: An Introduction. M.Tomczak and S.Godfrey
(2001) http://www.es.flinders.edu.au/~mattom/regoc/pdfversion.html

Notes on Units:
Knot: A knot is the universal maritime measure of distance. It is based on the spherical Earth where a nautical mile is one minute of latitude, that is 1/60 of a degree. A knot is one nautical mile per hour. Therefore, is we are headed due south averaging 5 kts for a full day we will cross two degrees of latitude. Roughly a knot is half a meter per second and a little bit more than one mile per hour.
1 kt = 0.5144 m/s = 1.15 mph.
Centigrade: In America we cling to the old Fahrenheit degree while the rest of the world and the world of science has been using the Celsius (or Centigrade) degree for the past decades. Americans will adapt, they must, so why not now? A quick rule for converting from ºC to ºF: double the temperature, subtract 10%, and add 32.

For me I remember that 0C = 32F, 10C = 50F, and 28C ~= 82F. Then you get an idea of the rest.

This crew log submitted by Iridium OpenPort and Stratos

Newer Posts →
  • S/V Ocean Watch Live Tracking

    S/V Ocean Watch Live Tracking
  • Upcoming Port Calls

    Seattle, Washington - Return June 17

  • Our Mission

    Around the Americas is a 28,000 mile sailing circumnavigation of the American continents with the mission of inspiring, educating and engaging the citizens of the Americas to protect our fragile oceans. Read more...
  • Recent Posts

    • Crew Log 253 – Dorothy Was Right
    • Crew Log 252 – Wrapping Things Up
    • Crew Log 251 – Closing the Circle
    • Education Log 4 – Ocean Watch and Mars
    • Crew Log 250 – Two Tales in One
    • Education Log 3 – Reflections on a Voyage of Discovery
    • Crew Log 249 – Around the Corner
    • Crew Log 248 – One Last Nosebleed
    • Crew Log 247 – Rolling Down the River
    • Crew Log 246 – Up the River
  • Browse the Archives

    Organized by category:
    Crew Logs
    Science
    Education

  • Categories

    • Crew Log
    • Education
    • For the Media
    • Port Calls
    • Recent Media Coverage
    • S/V Ocean Watch
    • Science
    • Uncategorized
    • Video
  • Tags

    aerosols APL-UW aquaculture arctic buoys Around the Americas ata Chihuly clouds coastal erosion corals current educator el niño environment floating debris friends history hydrophone jellyfish JISAO met package MIT Sea Perch NASA S'COOL ocean acidification ocean education ocean health onboard scientist plastic debris runoff sailors tourism weather wildlife
  • Search

  • Archives

    • June 2010
    • May 2010
    • April 2010
    • March 2010
    • February 2010
    • January 2010
    • December 2009
    • November 2009
    • October 2009
    • September 2009
    • August 2009
    • July 2009
    • June 2009
    • May 2009
    • April 2009
    • March 2009
  • Share this Blog

    Share |
 
Principal Partners
 
 
Major Funding From
 
 

© 2012 Around the Americas | Powered by WordPress Home | Blog | Contact Us | Original Site WordPress theme by Frank MacNeil