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.

 

2014 Arctic sea ice minimum sixth lowest on record
Arctic sea ice coverage continued its below-average trend this year as the ice declined to its annual minimum on Sept. 17, according to new research.
Publ.Date : Tue, 23 Sep 2014 09:02:48 EDT

Antifreeze proteins in Antarctic fishes prevent freezing ... and melting
Antarctic fishes that manufacture their own 'antifreeze' proteins to survive in the icy Southern Ocean also suffer an unfortunate side effect, researchers report: The protein-bound ice crystals that accumulate inside their bodies resist melting even when temperatures warm.
Publ.Date : Mon, 22 Sep 2014 15:28:46 EDT

Arctic sea ice helps remove carbon dioxide from atmosphere, study shows
Climate change is a fact, and most of the warming is caused by human activity. The Arctic is now so warm that the extent of sea ice has decreased by about 30 percent in summer and in winter, sea ice is getting thinner. New research has shown that sea ice removes carbon dioxide from the atmosphere. If Arctic sea ice is reduced, we may therefore be facing an increase of atmospheric concentration of carbon dioxide, researchers warn.
Publ.Date : Mon, 22 Sep 2014 11:04:24 EDT

Changes in coastal upwelling linked to temporary declines in marine ecosystem
In findings of relevance to both conservationists and the fishing industry, new research links short-term reductions in growth and reproduction of marine animals off the California Coast to increasing variability in the strength of coastal upwelling currents -- currents which historically supply nutrients to the region's diverse ecosystem.
Publ.Date : Thu, 18 Sep 2014 14:14:44 EDT

August and June-August global temperatures each reach record high, driven largely by record warm global oceans
According to NOAA scientists, the globally averaged temperature over land and ocean surfaces for August 2014 was the highest for August since record keeping began in 1880. It also marked the 38th consecutive August with a global temperature above the 20th century average. The last below-average global temperature for August occurred in 1976.
Publ.Date : Thu, 18 Sep 2014 11:19:17 EDT

Tropical rabbitfish a threat to Mediterranean Sea ecosystems
The tropical rabbitfish, which have devastated algal forests in the eastern Mediterranean Sea, pose a major threat to the entire Mediterranean basin if their distribution continues to expand as the climate warms, a new study warns. Researchers surveyed more than 1000 kilometers of coastline in Turkey and Greece, where two species of plant-eating rabbitfish have become dominant, and found regions with abundant rabbitfish had become rocky barrens.
Publ.Date : Thu, 18 Sep 2014 10:16:35 EDT

Nemo can travel great distances to connect populations: Baby clownfish travel hundreds of kilometers across open ocean
Clownfish spend their entire lives nestling in the protective tentacles of host anemones, but new research shows that as babies they sometimes travel hundreds of kilometres across the open ocean. Although the process of long-distance dispersal by reef fish has been predicted, this is the first time that the high level exchange of offspring between distant populations has been observed.
Publ.Date : Wed, 17 Sep 2014 14:14:25 EDT

Effect of ocean acidification: Coral growth rate on Great Barrier Reef plummets in 30-year comparison
Researchers working in Australia's Great Barrier Reef have documented that coral growth rates have plummeted 40 percent since the mid-1970s. The scientists suggest that ocean acidification may be playing an important role in this perilous slowdown.
Publ.Date : Wed, 17 Sep 2014 12:12:25 EDT

Great Barrier Reef is an effective wave absorber
The Great Barrier Reef is a remarkably effective wave absorber, despite large gaps between the reefs, a study concludes. The Great Barrier Reef in Australia is the largest coral reef system in the world, extending 2,300 km alongshore. The reef matrix is a porous structure consisting of thousands of individual reefs.
Publ.Date : Wed, 17 Sep 2014 07:31:08 EDT

Study on global carbon cycle may require reappraisal of climate events in Earth's history
A recent study of the global carbon cycle offers a new perspective of Earth's climate records through time. Scientists suggest that one of the current methods for interpreting ancient changes in the concentration of carbon dioxide in the atmosphere and oceans may need to be re-evaluated.
Publ.Date : Tue, 16 Sep 2014 13:25:21 EDT

The Gulf Stream kept going during the last Ice Age
The warm Atlantic water continued to flow into the icy Nordic seas during the coldest periods of the last Ice Age. An ice age may sound as a stable period of cold weather, but the name deceives. In the high latitudes of the Northern Hemisphere, the period was characterized by significant climate changes. Cold periods (stadials) switched abruptly to warmer periods (interstadials) and back.
Publ.Date : Tue, 16 Sep 2014 08:48:21 EDT

New producer of crucial vitamin B12 discovered
A single group of microorganisms may be responsible for much of the world's vitamin B12 production in the oceans, with implications for the global carbon cycle and climate change, researchers have discovered. Thaumarchaeota, they say, are likely dominant vitamin B12 producers.
Publ.Date : Mon, 15 Sep 2014 16:52:21 EDT

Small algae with great potential
The single most important calcifying algae of the world's oceans is able to simultaneously adapt to rising water temperatures and ocean acidification through evolution. A unique long-term experiment with the species Emiliania huxleyi shows that the evolutionary potential of the algae is much greater than previously thought. In their laboratory evolution experiment, the scientists have shown for the first time that evolutionary adaptations to multiple stress factors do not necessarily interfere with each other.
Publ.Date : Mon, 15 Sep 2014 13:29:41 EDT

Glaciers in northern Antarctic Peninsula melting faster than ever despite increased snowfall
Increased snowfall will not prevent the continued melting of glaciers in the northern Antarctic Peninsula, according to new research. Scientists have discovered that small glaciers that end on land around the Antarctic Peninsula are highly vulnerable to slight changes in air temperature and may be at risk of disappearing within 200 years.
Publ.Date : Sun, 14 Sep 2014 21:10:24 EDT

Ahoy, offshore wind: Advanced buoys bring vital data to untapped energy resource
Two large buoys that are decked out with advanced scientific instruments will help more accurately predict offshore wind’s power-producing potential.
Publ.Date : Fri, 12 Sep 2014 13:48:02 EDT

Microbes evolve faster than ocean can disperse them
Scientists have created an advanced model aimed at exploring the role of neutral evolution in the biogeographic distribution of ocean microbes. Over the past sev­eral decades, ecol­o­gists have come to under­stand that both natural selec­tion and neu­tral evolution -- that vari­a­tion within and between species is caused by genetic drift and random mutations -- play a role in the bio­geo­graphic pat­terns of ocean microbes. New results flew in the face of the long held notion that microbes are infi­nitely mobile.
Publ.Date : Thu, 11 Sep 2014 18:07:31 EDT

Last decade's slowdown in global warming enhanced by an unusual climate anomaly
A hiatus in global warming ongoing since 2001 is due to a combination of a natural cooling phase, known as multidecadal variability (MDV) and a downturn of the secular warming trend. The exact causes of the latter, unique in the entire observational record going back to 1850, are still to be identified, according to a new article.
Publ.Date : Thu, 11 Sep 2014 09:29:05 EDT

New study reconstructs mega-earthquakes timeline in Indian Ocean
A new study on the frequency of past giant earthquakes in the Indian Ocean region shows that Sri Lanka, and much of the Indian Ocean, is affected by large tsunamis at highly variable intervals, from a few hundred to more than 1,000 years. The findings suggest that the accumulation of stress in the region could generate as large, or even larger tsunamis than the one that resulted from the 2004 magnitude-9.2 Sumatra earthquake.
Publ.Date : Wed, 10 Sep 2014 09:32:27 EDT

Indian Ocean expedition pioneers citizen oceanography
Recreational sailors are being called upon to become 'citizen oceanographers' and help provide vital scientific knowledge about the world's oceans by sampling and testing remote waters from their yachts. In 2013, a microbiologist and sailing champion, led an international scientific expedition across the Indian Ocean to pioneer this cost-effective method of data collection. With the right equipment, citizen scientists could gather large quantities of information too, his team says.
Publ.Date : Tue, 09 Sep 2014 15:27:44 EDT

Shift in Arabia sea plankton may threaten fisheries
The rapid rise of an unusual plankton in the Arabian Sea has been documented by researchers who say that it could be disastrous for the predator fish that sustain 120 million people living on the sea's edge. "These blooms are massive, appear year after year, and could be devastating to the Arabian Sea ecosystem over the long-term," said the study's lead author.
Publ.Date : Tue, 09 Sep 2014 09:38:33 EDT