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.

 

Ocean algae will cope well in varying climates
Tiny marine algae that play a critical role in supporting life on Earth may be better equipped to deal with future climate change than previously expected, research shows.
Publ.Date : Tue, 30 Jun 2015 12:17:09 EDT

New study reveals mechanism regulating methane emissions in freshwater wetlands
Though they occupy a small fraction of the Earth's surface, freshwater wetlands are the largest natural source of methane going into the atmosphere. New research identifies an unexpected process that acts as a key gatekeeper regulating methane emissions from these freshwater environments.The study describes how high rates of anaerobic methane oxidation substantially reduce atmospheric emissions of methane from freshwater wetlands.
Publ.Date : Tue, 30 Jun 2015 12:12:13 EDT

Exit dinosaurs, enter fishes
A pair of paleobiologists have determined that the world's most numerous and diverse vertebrates -- ray-finned fishes -- began their ecological dominance of the oceans 66 million years ago, aided by the mass extinction event that killed off dinosaurs.
Publ.Date : Tue, 30 Jun 2015 10:06:07 EDT

Mapping ocean noise on a round-the-world sailing trip
20,000 Sounds under the Sea is a project that aims to study ocean sounds. The Swiss ship Fleur de Passion will go around the world in four years with the aim of measuring human impact on oceans and contributing to the debate surrounding the role of humankind at sea.
Publ.Date : Tue, 30 Jun 2015 08:05:09 EDT

Microplastics entering ocean food web through zooplankton, researchers find
Tiny microscopic animals called zooplankton are ingesting plastic particles at an alarming rate, according to a new study. That could not only pose a risk to salmon but also spell trouble for the entire aquatic food web -- from zooplankton to humpback whales.
Publ.Date : Mon, 29 Jun 2015 13:38:13 EDT

Retreating sea ice linked to changes in ocean circulation, could affect European climate
Retreating sea ice in the Iceland and Greenland Seas may be changing the circulation of warm and cold water in the Atlantic Ocean, and could ultimately impact the climate in Europe, says a new study.
Publ.Date : Mon, 29 Jun 2015 12:34:28 EDT

Extreme makeover: Humankind's unprecedented transformation of Earth
Human beings are pushing the planet in an entirely new direction with revolutionary implications for its life, a new study says, and in a new article, researchers suggest a turning point for the planet and its resources.
Publ.Date : Mon, 29 Jun 2015 08:01:58 EDT

Mediterranean Sea classified as the sixth highest region for the accumulation of plastic debris on the planet
The amounts of plastic debris in the Mediterranean are comparable to those reported for the great accumulation areas located in the centers of the oceans, a new study has concluded.
Publ.Date : Mon, 29 Jun 2015 07:59:46 EDT

Iron: A biological element?
Think of an object made of iron: An I-beam, a car frame, a nail. Now imagine that half of the iron in that object owes its existence to bacteria living two and a half billion years ago. That's the upshot of a new study. Its findings have meaning for fields as diverse as mining and the search for life in space.
Publ.Date : Fri, 26 Jun 2015 08:39:19 EDT

'Hydrothermal siphon' drives water circulation through seafloor
Vast quantities of ocean water circulate through the seafloor, flowing through the volcanic rock of the upper oceanic crust. A new study explains what drives this global process and how the flow is sustained. About 25 percent of the heat that flows out of Earth's interior is transferred to the oceans through this process.
Publ.Date : Fri, 26 Jun 2015 08:34:31 EDT

Blue and fin whale distribution in waters off Southern California
A new study indicates a steady population trend for blue whales and an upward population trend for fin whales in Southern California.
Publ.Date : Thu, 25 Jun 2015 16:14:38 EDT

Corals are already adapting to global warming, scientists say
Some coral populations already have genetic variants necessary to tolerate warm ocean waters, and humans can help to spread these genes, scientists have found.
Publ.Date : Thu, 25 Jun 2015 14:48:50 EDT

Backward-moving glacier helps scientists explain glacial earthquakes
The relentless flow of a glacier may seem unstoppable, but a team of researchers from the United Kingdom and the U.S. has shown that during some calving events -- when an iceberg breaks off into the ocean -- the glacier moves rapidly backward and downward, causing the characteristic glacial earthquakes which until now have been poorly understood.
Publ.Date : Thu, 25 Jun 2015 14:39:26 EDT

Antarctic life: Highly diverse, unusually structured
In a comprehensive assessment of Antarctic biodiversity scientists have revealed the region is more diverse and biologically interesting than previously thought. The team noted several unusual ways in which patterns of biodiversity are produced in the region. Geothermal, heated areas, such as volcanoes, have played an important role as refuges from icy, glacial conditions on land. At sea, wind has an especially significant effect on diversity. Windier areas have more seabird species.
Publ.Date : Thu, 25 Jun 2015 09:11:57 EDT

Analyzing ocean mixing reveals insight on climate
A computer model that clarifies the complex processes driving ocean mixing in the vast eddies that swirl across hundreds of miles of open ocean has been developed by researchers.
Publ.Date : Wed, 24 Jun 2015 18:24:32 EDT

Understanding subduction zone earthquakes: The 2004 Sumatra earthquake
The 26 December 2004 Mw ~9.2 Indian Ocean earthquake (also known as the Sumatra-Andaman or Aceh-Andaman earthquake), which generated massive, destructive tsunamis, especially along the Aceh coast of northern Sumatra, Indonesia, clearly demonstrated the need for a better understanding of how frequently subduction zone earthquakes and tsunamis occur.
Publ.Date : Tue, 23 Jun 2015 20:00:18 EDT

Sudden shift in 'forcing' led to demise of Laurentide ice sheet
The massive Laurentide ice sheet that covered Canada during the last ice age initially began shrinking through calving of icebergs, and then abruptly shifted into a new regime where melting on the continent took precedence, ultimately leading to the sheet's demise. This is important, because it may provide a clue to how ice sheets on Greenland and Antarctica may respond to a warming climate.
Publ.Date : Tue, 23 Jun 2015 10:36:15 EDT

The Southeast Pacific produces more nitrous oxide than previously thought
In addition to carbon dioxide there are plenty of other greenhouse gases. Nitrous oxide is one of them. However, a global assessment of emissions from the oceans is difficult because the measurement methods used so far have only allowed rough estimates. Using a new technology for continuous measurements, researchers have now discovered that nitrous oxide emissions from the Southeast Pacific are much higher than previously thought.
Publ.Date : Mon, 22 Jun 2015 12:46:26 EDT

Exceptional view of deep Arctic Ocean methane seeps
Close to 30.000 high definition images of the deep Arctic Ocean floor were captured on a recent research cruise. This gives us an exclusive insight into the most remote sites of natural methane release in the world.
Publ.Date : Mon, 22 Jun 2015 08:42:12 EDT

Alaska researcher investigates multiple endangered fin whale deaths
At least nine fin whales have been discovered floating dead in waters from Kodiak to Unimak Pass since late May. 'It is an unusual and mysterious event that appears to have happened around Memorial Day weekend,' said a marine mammal specialist. 'We rarely see more than one fin whale carcass every couple of years.'
Publ.Date : Fri, 19 Jun 2015 10:35:22 EDT