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Preview: EurekAlert! - Oceanography

EurekAlert! - Oceanography

The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.

Last Build Date: Thu, 19 Jan 2017 13:51:01 EST

Copyright: Copyright 2017 American Association for the Advancement of Science (AAAS); All rights reserved.

New regional sea level scenarios help communities prepare for future economic risks

Thu, 19 Jan 2017 00:00:00 EST

(NOAA Headquarters) New US regional sea level scenarios developed by NOAA and its partners will give coastal communities better, more localized data to help them plan for and adapt to the risk of rising sea levels to their economies and infrastructure. These new scenarios integrate updated global sea level rise scenarios with regional factors, such as changes in land elevations and ocean circulation, that influence sea level regionally.

Regional sea-level scenarios will help Northeast plan for faster-than-global rise

Thu, 19 Jan 2017 00:00:00 EST

(Rutgers University) Sea level in the Northeast and in some other US regions will rise significantly faster than the global average, according to a report released by the National Oceanic and Atmospheric Administration. In a worst-case scenario, global sea level could rise by about 8 feet by 2100, according to the report, which lays out six scenarios intended to inform national and regional planning.

UCI researchers map oceanic troughs below ice sheets in West Antarctica

Wed, 18 Jan 2017 00:00:00 EST

(University of California - Irvine) University of California, Irvine glaciologists have uncovered large oceanic valleys beneath some of the massive glaciers flowing into the Amundsen Sea in West Antarctica. Carved by earlier advances of ice during colder periods, the subsurface troughs enable warm, salty water to reach the undersides of glaciers, fueling their increasingly rapid retreat.

Mighty river, mighty filter

Wed, 18 Jan 2017 00:00:00 EST

(American Society of Agronomy) Researchers are reviving one of the Mississippi River's main filters: the floodplain. The result is a unique environment that removes nitrogen, a contributor to the Gulf of Mexico's dead zone.

International effort announced to try to save the world's most endangered marine mammal

Wed, 18 Jan 2017 00:00:00 EST

(National Marine Mammal Foundation) An ambitious, emergency plan to help save the vaquita porpoise from extinction in the northern Gulf of California has been recommended by the International Committee for the Recovery of the Vaquita (CIRVA). The plan involves relocating some of the remaining vaquitas to a temporary sanctuary, while crucial efforts aimed at eliminating illegal fishing and removing gillnets from their environment continue.

Researchers find seafloor valleys below West Antarctic glaciers

Wed, 18 Jan 2017 00:00:00 EST

(American Geophysical Union) Glaciologists have uncovered large valleys in the ocean floor beneath some of the massive glaciers flowing into the Amundsen Sea in West Antarctica. Carved by earlier advances of ice during colder periods, the troughs enable warm, salty water to reach the undersides of glaciers, fueling their increasingly rapid retreat.

Vitamin B-12, and a knockoff version, create complex market for marine vitamins

Wed, 18 Jan 2017 00:00:00 EST

(University of Washington) A new study shows that vitamin B-12 exists in two different, incompatible forms in the oceans. An organism thought to supply essential vitamin B-12 in the marine environment is actually churning out a knockoff version.

NASA's Aqua satellite sees Tropical Depression 01W ending near Southern Vietnam

Tue, 17 Jan 2017 00:00:00 EST

(NASA/Goddard Space Flight Center) NASA's Aqua satellite provided a visible-light image of Tropical Depression 01W as it headed toward southern Vietnam for a brief landfall on Jan. 16. By Jan. 17 the depression had dissipated.

How China is poised for marine fisheries reform

Mon, 16 Jan 2017 00:00:00 EST

(Stanford's School of Earth, Energy & Environmental Sciences ) China has introduced an unprecedented policy platform for stewarding its fisheries and other marine resources; in order to achieve a true paradigm shift a team of international scientists from within and outside of China recommend major institutional reform.

Genome sequence of polar alga explains evolutionary adaptation to extreme variable climate

Mon, 16 Jan 2017 00:00:00 EST

(University of East Anglia) An international team of researchers has identified the genetic mutations which allowed microalgae (phytoplankton) from the Southern Ocean to adapt to extreme and highly variable climates -- a step towards understanding how polar organisms are impacted by climate change.

NASA's Terra Satellite sees a spark of life in former Tropical Depression 01W's remnants

Fri, 13 Jan 2017 00:00:00 EST

(NASA/Goddard Space Flight Center) NASA's Terra satellite recently analyzed the remnant low pressure area previously known as Tropical Depression 01W in infrared light as it showed a spark of new activity.

Deep mantle chemistry surprise: Carbon content not uniform

Fri, 13 Jan 2017 00:00:00 EST

(Carnegie Institution for Science) Even though carbon is one of the most-abundant elements on Earth, it is actually very difficult to determine how much of it exists below the surface in Earth's interior. Analysis by Carnegie's Marion Le Voyer and Erik Hauri of crystals containing completely enclosed mantle magma with its original carbon content preserved has doubled the world's known finds of mantle carbon.

Protecting the Ocean

Thu, 12 Jan 2017 00:00:00 EST

(University of California - Santa Barbara) Benjamin Halpern, director of NCEAS, to receive the 2017 Peter Benchley Ocean Award for Excellence in Science.

Release of water shakes Pacific Plate at depth

Wed, 11 Jan 2017 00:00:00 EST

(Washington University in St. Louis) A team of seismologists analyzing the data from 671 earthquakes that occurred between 30 and 280 miles beneath the Earth's surface in the Pacific Plate as it descended into the Tonga Trench were surprised to find a zone of intense earthquake activity in the downgoing slab. The pattern of the activity along the slab provided strong evidence that the earthquakes are sparked by the release of water at depth.

Airborne thermometer to measure Arctic temperatures

Tue, 10 Jan 2017 00:00:00 EST

(Moscow Institute of Physics and Technology) The radiometry techniques in use for remote sensing of water temperature currently are only precise up to about a half degree. Russian scientists have compared the effectiveness of several techniques of remote water temperature detection based on laser spectroscopy and evaluated various approaches to spectral profile interpretation. Authors developed the technique that is precise up to 0.15 degrees Celsius. The research findings will support further development of sea surface temperature remote sensing solutions.

Rapid Arctic warming has in the past shifted Southern Ocean winds

Tue, 10 Jan 2017 00:00:00 EST

(University of Washington) Ice core records from the two poles show that during the last ice age, sharp spikes in Arctic temperatures shifted the position of winds around Antarctica.

Short-lived greenhouse gases cause centuries of sea-level rise

Mon, 09 Jan 2017 00:00:00 EST

(Massachusetts Institute of Technology) Even if there comes a day when the world completely stops emitting greenhouse gases into the atmosphere, coastal regions and island nations will continue to experience rising sea levels for centuries afterward, according to a new study by researchers at MIT and Simon Fraser University.

NASA spots short-lived Tropical Depression 01W

Mon, 09 Jan 2017 00:00:00 EST

(NASA/Goddard Space Flight Center) In just 24 hours after Tropical Depression 01W formed in the Philippine Sea it was already falling apart. NASA-NOAA's Suomi NPP satellite passed over the depression and saw the large, weakening depression being affected by wind shear.

El Niño, Pacific Decadal Oscillation implicated in domoic acid shellfish toxicity

Mon, 09 Jan 2017 00:00:00 EST

(Oregon State University) Researchers today reported in Proceedings of the National Academy of Sciences a strong correlation between toxic levels of domoic acid in shellfish and the warm-water ocean conditions orchestrated by two powerful forces -- El Niño events and the Pacific Decadal Oscillation. They say the findings are particularly timely, given the potential for greater domoic acid outbreak occurrences as oceans continue to warm due to climate change.

Great Barrier Reef almost drowned; climate implications

Thu, 05 Jan 2017 00:00:00 EST

(University of Sydney) The first comprehensive analysis of the Great Barrier Reef at a time of rapid sea-level rise during the beginning of the Last Interglacial found it almost died. The Ph.D. research shows the reef can be resilient but questions remain about cumulative impacts. The research also provides an accurate identification of the age of the fossil reef that grew before the modern Great Barrier Reef, some 129,000-121,000 years ago.

Arctic sea ice loss impacts beluga whale migration

Thu, 05 Jan 2017 00:00:00 EST

(University of Washington) A new University of Washington study finds the annual migration of some beluga whales in Alaska is altered by sea ice changes in the Arctic, while other belugas do not appear to be affected.

NOAA in 2017 to award up to $100 million for oil, chemical spill restoration projects

Thu, 05 Jan 2017 00:00:00 EST

(NOAA Headquarters) In 2017, NOAA Fisheries will award up to $100 million to restoration partners to implement projects addressing habitats and coastlines damaged by oil and chemical spills. The funds used for these awards come from settlements with responsible parties.

Climate change could trigger strong sea level rise

Thu, 05 Jan 2017 00:00:00 EST

(University of Bonn) About 15,000 years ago, the ocean around Antarctica has seen an abrupt sea level rise of several meters. It could happen again. An international team of scientists with the participation of the University of Bonn is now reporting its findings in the magazine Scientific Reports.

High-tech mooring will measure beneath Antarctic ice

Thu, 05 Jan 2017 00:00:00 EST

(Virginia Institute of Marine Science) Professor Elizabeth Shadwick of William & Mary's Virginia Institute of Marine Science has deployed a high-tech mooring beneath the seasonally ice-covered waters around Antarctica to better understand ocean acidification in polar regions.

More frequent hurricanes not necessarily stronger on Atlantic coast

Wed, 04 Jan 2017 00:00:00 EST

(University of Wisconsin-Madison) Active Atlantic hurricane periods, like the one we are in now, are not necessarily a harbinger of more, rapidly intensifying hurricanes along the US coast, according to new research performed at the University of Wisconsin-Madison.