Oceanography News

Courtesy of Science Daily

Welcome to Sea and Sky's Oceanography News. Here you can find links to the latest ocean news headlines in the topic of oceanography. Click on any yellow title below to view the full news article. The news article will open in a new browser window. Simply close the browser window when you are finished reading the article to return to the news article listing. You can use the "Click for More" link to go to a page with more news headlines.

 

Life on the floor of the Arctic Ocean, with rigor and in detail
In an extensive and rigorous study of animal life on the Central Arctic Ocean floor, researchers have shown that water depth and food availability influence the species composition, density, and biomass of benthic communities.
Publ.Date : Wed, 17 Oct 2018 14:10:11 EDT

Arctic ice sets speed limit for major ocean current
Scientists have now identified a key mechanism, which they call the 'ice-ocean governor,' that controls how fast the Beaufort Gyre spins and how much fresh water it stores. Researchers report that the Arctic's ice cover essentially sets a speed limit on the gyre's spin.
Publ.Date : Wed, 17 Oct 2018 14:09:25 EDT

World Heritage Sites threatened by rising sea levels
In the Mediterranean region, there are numerous UNESCO World Heritage Sites in low-lying coastal areas. In the course of the 21st century, these sites will increasingly be at risk by storm surges and increasing coastal erosion due to sea-level rise.
Publ.Date : Wed, 17 Oct 2018 11:10:22 EDT

Antarctic ice shelf 'sings' as winds whip across its surface
Winds blowing across snow dunes on Antarctica's Ross Ice Shelf cause the massive ice slab's surface to vibrate, producing a near-constant set of seismic 'tones' scientists could potentially use to monitor changes in the ice shelf from afar, according to new research.
Publ.Date : Tue, 16 Oct 2018 15:06:54 EDT

Arctic sea ice decline driving ocean phytoplankton farther north
A new study reveals phytoplankton spring blooms in the Arctic Ocean, which were previously nonexistent, are expanding northward at a rate of one degree of latitude per decade. Although blooms did not previously occur in this area, phytoplankton were present in the Arctic's central basin at low biomass. The study also found the primary productivity of the phytoplankton, or the rate at which phytoplankton convert sunlight into chemical energy, is increasing during the spring blooms.
Publ.Date : Mon, 15 Oct 2018 14:15:14 EDT

Scientists find missing piece in glacier melt predictions
A new method for observing water within ice has revealed stored meltwater that may explain the complex flow behavior of some Greenland glaciers, an important component for predicting sea-level rise in a changing climate.
Publ.Date : Mon, 15 Oct 2018 10:05:08 EDT

Predicting an El Niño or La Niña year 17 months in advance
El Niño-Southern Oscillation (ENSO) leads to extreme climatic variations called El Niño and La Niña that cause dangerous weather conditions in many regions throughout the world. Currently, a reliable forecast of the ENSO phases can be made about a year beforehand. This study details a novel method that allows for the accurate forecast of its phases up to 17 months in advance.
Publ.Date : Mon, 15 Oct 2018 08:46:33 EDT

Sea snail shells dissolve in increasingly acidified oceans
Shelled marine creatures living in increasingly acidified oceans face a fight for survival as the impacts of climate change spread, a new study suggests.
Publ.Date : Mon, 15 Oct 2018 08:46:11 EDT

Does climate vary more from century to century when it is warmer?
Century-scale climate variability was enhanced when the Earth was warmer during the Last Interglacial period (129,000-116,000 years ago) compared to the current interglacial (the last 11,700 years), according to a new study.
Publ.Date : Fri, 12 Oct 2018 08:26:58 EDT

GeoSEA array records sliding of Mount Etna's southeastern flank
The southeast flank of Mount Etna slowly slides towards the sea. A team of scientists showed for the first time movement of Etna's underwater flank using a new, sound-based geodetic monitoring network. A sudden and rapid descent of the entire slope could lead to a tsunami with disastrous effects for the entire region.
Publ.Date : Wed, 10 Oct 2018 14:17:47 EDT

Changes in polar jet circulation bring more dust from Sahara Desert to the Arctic
Poleward transport of warm, moist, and dust-laden air masses from the Sahara Desert results in ice melting in southeast Greenland, scientists have found.
Publ.Date : Wed, 10 Oct 2018 10:56:15 EDT

Oceans are changing
New research finds that when westerly winds in the Antarctic Ocean strengthen during the austral summer (October to February), surface waters in the region acidify faster than can be accounted for by increases in carbon dioxide from the atmosphere alone.
Publ.Date : Tue, 09 Oct 2018 17:56:43 EDT

Polar bears gorged on whales to survive past warm periods; won't suffice as climate warms
A new study found that while dead whales are valuable sources of fat and protein for some polar bears, this resource will likely not be enough to sustain most bear populations in the future when the Arctic becomes ice-free in summers.
Publ.Date : Tue, 09 Oct 2018 17:56:39 EDT

Rapid, widespread changes may be coming to Antarctica's Dry Valleys
Antarctica's sandy polar desert, the McMurdo Dry Valleys, has undergone changes over the past decade and the recent discovery of thawing permafrost, thinning glaciers and melting ground ice by a research team are signs that rapid and widespread change could be on the horizon.
Publ.Date : Tue, 09 Oct 2018 13:58:22 EDT

High-res data offer most detailed look yet at trawl fishing footprint around the world
A new analysis that uses high-resolution data for 24 ocean regions in Africa, Europe, North and South America and Australasia shows that 14 percent of the overall seafloor shallower than 1,000 meters (3,280 feet) is trawled. The analysis shows that the footprint of bottom-trawl fishing on continental shelves and slopes across the world's oceans often has been substantially overestimated.
Publ.Date : Mon, 08 Oct 2018 18:34:13 EDT

Global sea level could rise 50 feet by 2300, study says
Global average sea-level could rise by nearly 8 feet by 2100 and 50 feet by 2300 if greenhouse gas emissions remain high and humanity proves unlucky, according to a review of sea-level change and projections.
Publ.Date : Mon, 08 Oct 2018 08:34:56 EDT

'Turbidity currents' are not just currents, but involve movement of the seafloor itself
Turbidity currents in submarine canyons often involve large-scale movement of the seafloor. This discovery could help ocean engineers avoid damage to pipelines, communications cables, and other seafloor structures.
Publ.Date : Fri, 05 Oct 2018 14:19:08 EDT

Ground shaking during devastating flood offers new insights
Scientists were able to record a sudden outburst of a glacial lake with seismometers deployed the year before in the wake of the catastrophic Ghorka earthquake in April 2015. The authors of a new study argue that such major flood events have a greater impact on erosion rates than the annual monsoon rainfalls. The reason is that the water masses mobilize large boulders and coarse sediment which usually protect the riverbed.
Publ.Date : Thu, 04 Oct 2018 14:39:58 EDT

Seagrass meadows in Guam have decreased by 22 percent, new analysis shows
As the oceans warm and humans migrate to or grow in numbers in coastal areas of the world, scientists are increasingly keeping an eye on ocean seagrasses and their decline. A new analysis shows that seagrass meadows in Guam have decreased by 22 percent.
Publ.Date : Thu, 04 Oct 2018 10:00:02 EDT

Climate change efforts should focus on ocean-based solutions
The first broad-scale assessment of ocean-based measures to reduce atmospheric carbon dioxide, counteract ocean warming and/or reduce ocean acidification and sea-level rise shows their high potential to mitigate climate change and its impacts. The study identifies ocean-based renewable energy as the most promising, and several local marine conservation and restoration options as 'no-regret measures', that should be scaled-up and implemented immediately, but concludes all other measures are still too uncertain to recommend without further research.
Publ.Date : Thu, 04 Oct 2018 08:53:46 EDT