Arctic excursion explores how sea life copes with continuous winter darkness
When the North Pole tilts away from the sun during the winter, the Arctic region plunges into weeks of continuous darkness. The sun never peeks above the horizon, casting only a twinge of blue twilight at midday, and the moon dimly illuminates the landscape at night if conditions are clear.
People living in this “polar night” have adapted to the darkness using artificial light, but how ocean inhabitants cope remains to be seen. (more…)
New remotely operated vehicle to aid UD marine research efforts
UD researchers discuss a new underwater robot that will assist in marine research.
An underwater robot made a splash at a University of Delaware swimming pool recently in a test of the new equipment, which will soon be used in field research by College of Earth, Ocean and Environment (CEOE) scientists.
The device, called a remotely operated vehicle (ROV), can dive deep below the ocean surface to record video, create sonar images and retrieve objects. (more…)
*Damaged deep-sea corals discovered months after Deepwater Horizon spill*
Scientists are reporting new evidence that the Deepwater Horizon oil spill has affected marine life in the Gulf of Mexico, this time species that live in dark ocean depths–deepwater corals.
The research used a range of underwater vehicles, including the submarine Alvin, to investigate the corals. The findings are published this week in the journal Proceedings of the National Academy of Sciences (PNAS). (more…)
A new study provides a composite picture of the environmental distribution of oil and gas from the 2010 Deepwater Horizon spill in the Gulf of Mexico. It amasses a vast collection of available atmospheric, surface and subsurface chemical data to assemble a “mass balance” of how much oil and gas was released, where it went and the chemical makeup of the compounds that remained in the air, on the surface, and in the deep water.
The study, “Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution,” is published online in the journal Proceedings of the National Academy of SciencesUSA. (more…)
ANN ARBOR, Mich.— Under the cold clear waters of Lake Huron, University of Michigan researchers have found a five-and-a-half foot-long, pole-shaped piece of wood that is 8,900 years old. The wood, which is tapered and beveled on one side in a way that looks deliberate, may provide important clues to a mysterious period in North American prehistory.
“This was the stage when humans gradually shifted from hunting large mammals like mastodon and caribou to fishing, gathering and agriculture,” said anthropologist John O’Shea. “But because most of the places in this area that prehistoric people lived are now under water, we don’t have good evidence of this important shift itself– just clues from before and after the change. (more…)
When a group of five high school students embarked on Project Shiphunt, an expedition in search of lost shipwrecks, in May in Lake Huron, the Woods Hole Oceanographic Institution’s Advanced Imaging and Visualization Lab (AIVL) was there, surveying and capturing 3D footage of the finds. The work was conducted as part of Project Shiphunt, an initiative developed by Sony and Intel Corp and led by National Oceanic and Atmospheric Association (NOAA).
“It was gratifying to be a part of a project that engages kids in the excitement of exploration and discovery,” said Bill Lange, director of AIVL. Lange led a crew of videographers, divers and pilots of two remotely operated vehicles (ROV) during the expedition. “Our Sony cameras gave the students the ability to have that experience in real time and in some cases to direct the cameras to investigate specific features of the wreck. The high-definition footage we collected will be invaluable to scientists and marine archaeologists working to learn from the wrecks.” (more…)
It may take years before scientists determine the full impact of the 2010 Deepwater Horizon oil spill in the Gulf of Mexico. But, utilizing the human-occupied submersible Alvin and the autonomous underwater vehicle (AUV) Sentry, researchers are about to investigate—and view first-hand—the possible effects of the spill at the bottom of the Gulf.
And, from Dec. 6-14, the mission will be relayed to the public as it happens on the Woods Hole Oceanographic Institution’s (WHOI) Dive and Discover website (https://divediscover.whoi.edu). (more…)
