Nineteen days at sea in the 'graveyard of the Atlantic' to study the confluence of southward- and northward-flowing currents that meet at Cape Hatteras. Here the mighty Gulf Stream—warm and salty—breaks away from the that carries cold, relatively fresh water from the Arctic and North Atlantic Oceans. Which property of soil is determined by the parent rock? (c) Area where warm ocean currents and cold currents meet (d) Area of ocean currents Ans: (a) Q Yoongi Both parents feed young. Young fledges ahout 60 days after hatching, goes out to sea. migration Not strongly migratory, with Widespread at sea, concentrating around upwellings and areas where cold and warm currents meet.
Together, they form the ENSO cycle. Most of the time, we are not experiencing ENSO conditions. Each phase can persist for decades. Cooler surface waters supported big sardine populations, while anchovy numbers dropped.
Where Currents Collide
Warm phases caused the opposite: Current events A few years ago, Kyle noticed a similar ebb and flow in the numbers of adult loggerhead sea turtles. Photo by Charlene Boarts Both are cold-blooded creatures sensitive to water temperatures. That gave Kyle an idea. In other words, hatchlings born into certain ocean conditions had a better chance of surviving into adulthood. That suggests loggerhead turtle populations are linked to climate cycles.
Baby loggerhead turtle survival depends on ocean circulation—specifically the Kuroshio Current, which zips past loggerhead nesting areas in southern Japan. During negative PDO phases, the Kuroshio Current sweeps the tiny turtles into warm, unproductive waters to the south where there is little food. In other words, decades of negative PDO conditions can devastate loggerhead populations—simply because they were born at the wrong time. Cooler ocean conditions give baby loggerhead sea turtles a better chance of survival.
Positive PDO phases, on the other hand, are good times for these turtles. The powerful Kuroshio Current weakens, allowing hatchlings to swim to cooler, more productive waters at higher latitudes.
These lucky turtles have better changes of finding food, getting strong and growing up. The carbon-current connection The helicopter parents of the ocean world are better able to shelter their young from the dramatic impacts of climatic shifts. We deployed a variety of moored instruments: The moorings were placed at strategic locations and will be picked up at the end of the two-week cruise.
Each deployment requires a slightly different procedure. Some take 15 minutes, others several hours. Water sloshed across the deck continually as we worked—attaching instruments to the mooring lines, moving heavy anchors, testing acoustic release equipment. My duty involved standing at the starboard rail holding the acoustic release transducer cable over the side while Craig Marquette, an engineer from the WHOI Physical Oceanography Department, tested the releases.
Where Currents Collide : Oceanus Magazine
For whatever reason, the waves seemed to be drawn to that location. My survival suit was soaked with salt water by the end of the day.
We have commenced towed vehicle operations, the heart of the project. A wing-shaped vehicle, 2 meters 6 feet long, called the Scanfish will collect temperature and salinity data as we tow it behind us. Brian Kidd from the University of Delaware is our Scanfish expert.
Brian has bags under his eyes. I go outside to feel a cold wind in my face. A thick fog billows over the waves, caused by the cold northerly air passing over the balmy waters of the Gulf Stream.
The wind whips the fog over the wave crests as dolphins surf the foot rollers.
I fight my way up to the bridge for a better look. As the sun sets, the waves and mist turn gold. The wave crests look like distant mountain ridges. I feel like the sea has given us a little reward for our determination. We pulled into Morehead City, N. Thirty-five foot waves are forecast for the Gulf Stream. Or perhaps it is a morale-boosting decision by the captain and chief scientist? The familiar hum of the engines was absent when I woke up.
- Think your parents are tough? Try being a sea turtle
After two weeks on the ship, you become attuned to every sound and motion. The hum and whir of the propellers started up again.
Labrador Current - Wikipedia
The sound of waves slamming into the side of the ship resumed, as did our wild rolls from side to side. Hmm, we must have just finished a CTD cast and are moving on to another station. The last thing you want in rough weather is for the CTD to become a wrecking ball. It made for a long night, but the constant activity made time go faster. He replied that the ingredients would slide off in the oven.
Our definition of bad weather has changed. No pizza for us tonight. I was heading up to the main lab today when I heard a series of faint whistles and clicks. I watched them until sunset. They seemed delighted to find something to play with out in the cold dark ocean. Winds have increased to storm force—again.
Too rough for Scanfish, too rough for CTDs, too rough for pizza, and too rough for reading in my bunk. As the ship rolled heavily in the swell, portholes in the main lab alternated between views of the sky and views beneath the waves. As the water swirled around the round porthole, I had an uncanny feeling like I was in a giant steel washing machine.
With just the right pillow placement, I have managed to wedge myself into my bunk.