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Global fisheries to be, on average, 20 percent less productive in 2300, UCI study finds

Science Daily - Thu, 03/08/2018 - 13:31
Scientists expect the world's fisheries to be, on average, 20 percent less productive in the year 2300, with those in the North Atlantic down nearly 60 percent and those in much of the western Pacific experiencing declines of more than 50 percent.

Desertification and monsoon climate change linked to shifts in ice volume and sea level

Science Daily - Wed, 03/07/2018 - 09:08
The East Asian summer monsoon and desertification in Eurasia is driven by fluctuating Northern Hemisphere ice volume and global sea level during the Ice Age, as shown in a new study. Today, two thirds of the world’s population is dependent on agriculture sustained by rains of the East Asian summer monsoon, and future climate change in this region can therefore have a major impact on global food production.

Glaciers in Mongolia's Gobi Desert actually shrank during the last ice age

Science Daily - Tue, 03/06/2018 - 07:54
High in Mongolia's Gobi Desert, the climate is so dry and cold that glaciers shrank during the last ice age. Dating of rock deposits shows how glaciers in this less-studied region behave very differently as the climate shifts.

Snowpack levels show dramatic decline in western states, U.S.

Science Daily - Fri, 03/02/2018 - 11:48
A new study of long-term snow monitoring sites in the western United States found declines in snowpack at more than 90 percent of those sites -- and one-third of the declines were deemed significant.

Thawing permafrost causing the 'browning' of northern lakes

Science Daily - Fri, 03/02/2018 - 11:46
As ice the melts, the organic carbon found in permafrost is being released once again after ages of confinement in the soil. It is making its way into Arctic and subarctic lakes and ponds, and modifying their composition.

Previously unknown 'supercolony' of Adélie penguins discovered in Antarctica

Science Daily - Fri, 03/02/2018 - 08:09
In a paper released on March 2nd in the journal Scientific Reports, the scientists announced the discovery of a previously unknown 'supercolony' of more than 1,500,000 Adélie Penguins in the Danger Islands, a chain of remote, rocky islands off of the Antarctic Peninsula's northern tip.

Fossilised plant leaf wax provides new tool for understanding ancient climates

Science Daily - Fri, 03/02/2018 - 08:09
New research has outlined a new methodology for estimating ancient atmospheric water content based on fossil plant leaf waxes.

Lake Montcortès in Spain reveals the ecological footprint of climate change from the last 500 years

Science Daily - Wed, 02/28/2018 - 14:36
Oxygen decline in water masses is an environmental problem in lakes and ponds around the world. This phenomenon, which alters the conditions of continental water ecosystems, seems to be linked to global warming.

Land partnerships have high potential to preserve biodiversity as climate shifts

Science Daily - Wed, 02/28/2018 - 13:44
Conservation partnerships between protected lands and their non-protected neighbors could significantly improve a region's ability to accommodate species migration in response to shifting climates, according to a new study.

As summers get warmer, more rain may not be better than less

Science Daily - Wed, 02/28/2018 - 12:41
Warm, wet summers are historically unusual and could bring unexpected disruptions to ecosystems and society, according to new research.

Complete genomes of extinct and living elephants sequenced

Science Daily - Mon, 02/26/2018 - 14:27
Researchers have produced one of the most comprehensive evolutionary pictures to date by looking at one of the world's most iconic animal families - namely elephants, and their relatives mammoths and mastodons-spanning millions of years.

King penguins may be on the move very soon

Science Daily - Mon, 02/26/2018 - 11:25
More than 70 percent of the global King penguin population, currently forming colonies in Crozet, Kerguelen and Marion sub-Antarctic islands, may be nothing more than a memory in a matter of decades, as global warming will soon force the birds to move south, or disappear.

Surprising new study redraws family tree of domesticated and 'wild' horses

Science Daily - Thu, 02/22/2018 - 13:51
New research overturns a long-held assumption that Przewalski's horses, native to the Eurasian steppes, are the last wild horse species on Earth.

Stagnation in the South Pacific

Science Daily - Thu, 02/22/2018 - 13:49
A team led by geochemist has discovered important evidence that the rise in atmospheric carbon dioxide levels at the end of the last ice age was triggered by changes in the Antarctic Ocean.

Extinct lakes of the American desert west

Science Daily - Thu, 02/22/2018 - 12:34
The vestiges of lakes long extinct dot the landscape of the American desert west. These fossilized landforms provide clues of how dynamic climate has been over the past few million years.

First evidence of surprising ocean warming around Galápagos corals

Science Daily - Wed, 02/21/2018 - 12:18
A new analysis of the natural temperature archives stored in coral reefs shows the ocean around the Galápagos Islands has been warming since the 1970s. The finding surprised the research team, because the sparse instrumental records for sea surface temperature for that part of the eastern tropical Pacific Ocean did not show warming. Scientists thought strong upwelling of colder deep waters spared the region from the warming seen in other parts of the Pacific.

Beluga whales dive deeper, longer to find food in Arctic

Science Daily - Tue, 02/20/2018 - 15:12
Beluga whales that spend summers feeding in the Arctic are diving deeper and longer to find food than in earlier years, when sea ice covered more of the ocean for longer periods, according to a new analysis.

Sea-level legacy: 20 cm more rise by 2300 for each 5-year delay in peaking emissions

Science Daily - Tue, 02/20/2018 - 11:30
Peaking global carbon dioxide emissions as soon as possible is crucial for limiting the risks of sea-level rise, even if global warming is limited to well below 2 degrees C. A new study analyzes for the first time the sea-level legacy until 2300 within the constraints of the Paris Agreement.

Oil-eating microbes are challenged in the Arctic

Science Daily - Tue, 02/20/2018 - 09:41
Bacteria play a major role in cleaning up oil spills and mitigating its environmental impacts. In a new paper, researchers examine the major limiting factors for microbial degradation in Arctic environments.

Nitrate flux in the Arctic not following the decreasing NOx emissions in neighboring countries

Science Daily - Tue, 02/20/2018 - 08:49
Nitrate deposits in the Arctic remains high even after the turn of the century, despite environmental policies adopted by neighboring countries in the late 20th century to cut nitrogen oxide (NOx) emissions.

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