Oceanus Online Archive
Scientists Unearth Long Record of Past Hurricanes
Reaching down into the muck below a lagoon off Puerto Rico, two geologists at Woods Hole Oceanographic Institution reached back 5,000 years to compile the longest record of strong hurricanes…
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Cell-sized Thermometers
Climate shifts are a repeating feature in Earth’s history, but humans have added so much greenhouse gas (especially carbon dioxide) to the atmosphere that climate is warming in our lifetimes.…
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Letter from Kangiqsujuaq
Charlie’s Motel was a welcome break from Kangiqsujuaq’s airport in northernmost Quebec, where we had just spent six hours uselessly waiting for the plane that would take us home. But…
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Dead Corals Do Tell Tales
Sometime around the beginning of the 17th century, a tiny drifting larva found the perfect piece of real estate to settle down, on the shallow seafloor off the island of…
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Why the West Wind Wobbles
Winds and temperatures in Earth’s atmosphere vary from month to month and year to year in countless ways. Decades of monitoring the weather and climate have revealed a few simple…
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Sunspots, Sea Changes, and Climate Shifts
Natural materials such as shells, ice, corals, and tree rings contain clues to help scientists piece together how our oceans, atmosphere, and land have changed in the past. The history…
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Lakes and Climates Have Their Ups and Downs
Between 5,400 and 3,000 years ago, something happened to New England’s climate. The region became drier. Water levels in lakes dropped. Several droughts persisted for hundreds of years, changing the…
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How Long Can the Ocean Slow Global Warming?
It is 4:30 a.m., far from land. A group of scientists clad in bright yellow foul-weather gear gathers in the open bay of a research ship. They wait in the…
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Ocean Circulation and a Clam Far From Home
In my first year of graduate school, I was stumped by a big question on my final exam in biological oceanography. Maybe I had missed the relevant lecture or an…
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The Once and Future Circulation of the Ocean
The short history of modern oceanographic observations—less than a century’s worth, really—doesn’t give us a long track record to evaluate how the ocean’s circulation has operated and changed in the…
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What Other Tales Can Coral Skeletons Tell?
In 2003, we traveled by ship to the New England Seamounts—a chain of extinct, undersea volcanoes about 500 miles off the East Coast of North America—to help collect dead corals…
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The Coral-Climate Connection
Are the climate changes we perceive today just part of the Earth system’s natural variability, or are they new phenomena brought about by human activities? One way to find out…
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Analyzing Ancient Sediments at Warp Speed
Like a toy out of a science fiction story, the X-ray fluorescence core scanner reveals intimate details of the composition of ancient mud and sediment–which can contain a variety of clues about past climate and environmental conditions on Earth–without breaking the surface. In a matter of hours, the XRF simultaneously captures digital photographs and X-ray images of every millimeter of a core sample, while detecting the presence of any of 80 chemical elements.
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An Ocean Warmer Than a Hot Tub
Scientists have found evidence that tropical Atlantic Ocean temperatures may have once reached 107°F (42°C)—about 25°F (14°C) higher than today. The surprisingly high ocean temperatures occurred millions of years ago…
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The Flywheel of the Arctic Climate Engine
A key component of the Arctic climate clockworks is the Beaufort Gyre?a bowl of cold, icy, relatively fresh waters north of Alaska that is swept by prevailing winds into a circular swirl larger than the Gulf of Mexico.
Read MoreIs Global Warming Changing the Arctic?
In the Arctic, the air, sea ice, and underlying ocean all interact in a delicately balanced system. Four ambitious Arctic projects are pulling back the icy veil that shrouds our understanding of the Arctic Ocean?s role in our climate system. (First of a five-part series.)
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Fresher Ocean, Cooler Climate
Large and climatically sensitive regions of the North Atlantic Ocean have become less salty since the late 1960s, a trend that could alter global ocean circulation and spur climate changes by the 21st century.
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Joyce, Evans Give Testimony on Oceans to Congress
WHOI scientists Rob Evans and Terry Joyce testified June 8 before the House Subcommittee on Fisheries and Oceans, chaired by Wayne Gilchrest (R-Md.) in a continuing effort to help educate the U.S. House of Representatives on the oceans.
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The Great Flood of New York
An ice dam forming a large Ice Age lake collapsed 13,350 years ago, sending a flood down the Hudson River Valley and causing dramatic climate changes.
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Rising Sea Levels and Moving Shorelines
Changes to the shoreline are inevitable and inescapable. Shoals and sandbars become islands and then sandbars again. Ice sheets grow and shrink, causing sea level to fall and rise as water moves from the oceans to the ice caps and back to the oceans. Barrier islands rise from the seafloor, are chopped by inlets, and retreat toward the mainland. Even the calmest of seas are constantly moving water, sand, and mud toward and away from the shore, and establishing new shorelines.
How the Isthmus of Panama Put Ice in the Arctic
The long lag time has always puzzled scientists: Why did Antarctica become covered by massive ice sheets 34 million years ago, while the Arctic Ocean acquired its ice cap only about 3 million year ago?
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Shifting Continents and Climates
Sixty-five millions years ago, dinosaurs had just become extinct, and mammals were starting to dominate the planet.
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Moving Earth and Heaven
The mountains rise, are lashed by wind and weather, and erode. The rivers carry mud and debris from the mountains into the ocean, where they settle onto the relatively tranquil seafloor and are preserved. The sediments bear evidence about where they came from, what happened to them, and when. By analyzing, measuring, and dating these seafloor sediments, scientists can piece together clues to reconstruct when and how fast their mountain sources rose to great heights millions of years ago, and how the climate and other environmental conditions may have changed in response.
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