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New evidence confirms human activities drive global warming

Science Daily - Mon, 02/22/2016 - 08:11
A new statistical technique, analyzing data records since measuring started 150 years ago, independently confirms that human-made carbon dioxide and methane emissions have led to global warming, according to a recent article. The analysis also shows that the most pronounced consequences of such emissions are being felt in localized regions around the globe, such as Europe, North America, China, Siberia, the Sahel zone in Africa, and Alaska.

'Ice age blob' of warm ocean water discovered south of Greenland

Science Daily - Fri, 02/19/2016 - 12:48
Greenland experienced several abrupt and brutal climate changes during the last ice age. But even during the coldest periods a blob of warm surface water existed nearby.

Arctic opposite to North Atlantic

Science Daily - Fri, 02/19/2016 - 08:26
For long time freshwater has been seen as one potential cause for rapid climate change in the North Atlantic – Arctic region – probably most people have heard about the ‘Gulf Stream is slowing down’ scenarios with freshwater leading to sluggish currents and less heat being transported to northern high latitudes. In our two recent studies we were able to show that while such a scenario is plausible in the North Atlantic, the ocean response in the Arctic is quite the opposite.

New study is 'a leap forward' in our understanding of ice sheet behavior

Science Daily - Wed, 02/17/2016 - 13:04
In recent years, climate scientists have grown increasingly concerned that massive rivers of ice flowing into the ocean from Greenland and Antarctica could accelerate as the planet warms, leading to a catastrophic collapse of Earth's ice sheets. But a new article presents an alternative narrative of the manner in which an ice sheet can disappear.

Ice sheet modeling of Greenland, Antarctica helps predict sea-level rise

Science Daily - Tue, 02/16/2016 - 08:11
Predicting the expected loss of ice sheet mass is difficult due to the complexity of modeling ice sheet behavior. To better understand this loss, a team of researchers has been improving the reliability and efficiency of computational models that describe ice sheet behavior and dynamics.

Rare beluga data show whales dive to maximize meals

Science Daily - Fri, 02/12/2016 - 13:09
As the Arctic continues to change due to rising temperatures, melting sea ice and human interest in developing oil and shipping routes, it's important to understand belugas' baseline behavior, argue the authors of a new article.

Rare beluga data show whales dive to maximize meals

Science Daily - Fri, 02/12/2016 - 13:09
As the Arctic continues to change due to rising temperatures, melting sea ice and human interest in developing oil and shipping routes, it's important to understand belugas' baseline behavior, argue the authors of a new article.

Catastrophic failure of South American Ice Age dam changed Pacific Ocean circulation and climate

Science Daily - Fri, 02/12/2016 - 09:24
The catastrophic release of fresh water from a vast south American lake at the end of the last Ice Age was significant enough to change circulation in the Pacific Ocean according to new research. The study reveals that the lake, which was about one third the size of Wales, drained several times between 13,000 and 8,000 years ago, with devastating consequences.

Catastrophic failure of South American Ice Age dam changed Pacific Ocean circulation and climate

Science Daily - Fri, 02/12/2016 - 09:24
The catastrophic release of fresh water from a vast south American lake at the end of the last Ice Age was significant enough to change circulation in the Pacific Ocean according to new research. The study reveals that the lake, which was about one third the size of Wales, drained several times between 13,000 and 8,000 years ago, with devastating consequences.

Giant flightless bird wandered the Arctic 50 million years ago

Science Daily - Fri, 02/12/2016 - 09:23
New research confirms there really was a giant, flightless bird with a head the size of a horse's wandering about in the winter twilight of the high Arctic some 53 million years ago.

Giant flightless bird wandered the Arctic 50 million years ago

Science Daily - Fri, 02/12/2016 - 09:23
New research confirms there really was a giant, flightless bird with a head the size of a horse's wandering about in the winter twilight of the high Arctic some 53 million years ago.

Decade of rising seas slowed by land soaking up extra water

Science Daily - Thu, 02/11/2016 - 18:23
New measurements from a NASA satellite have allowed researchers to identify and quantify, for the first time, how climate-driven increases of liquid water storage on land have affected the rate of sea level rise. A new study shows that while ice sheets and glaciers continue to melt, changes in weather and climate over the past decade have caused Earth's continents to soak up and store an extra 3.2 trillion tons of water in soils, lakes and underground aquifers, temporarily slowing the rate of sea level rise by about 20 percent.

Decade of rising seas slowed by land soaking up extra water

Science Daily - Thu, 02/11/2016 - 18:23
New measurements from a NASA satellite have allowed researchers to identify and quantify, for the first time, how climate-driven increases of liquid water storage on land have affected the rate of sea level rise. A new study shows that while ice sheets and glaciers continue to melt, changes in weather and climate over the past decade have caused Earth's continents to soak up and store an extra 3.2 trillion tons of water in soils, lakes and underground aquifers, temporarily slowing the rate of sea level rise by about 20 percent.

Climate change deteriorates water quality in the Himalayas affecting 40% of world’s population

Science Daily - Wed, 02/10/2016 - 10:17
A new study on climate change and geochemical process of waters and lake sediments on the Tibetan Plateau show that global warming affects geochemical processes such as glacier melting, soil erosion and sediments release. This deteriorates water quality of rivers and lakes, thus significantly impacting the lives of 40 percent of the world’s population living in the area.

Climate change deteriorates water quality in the Himalayas affecting 40% of world’s population

Science Daily - Wed, 02/10/2016 - 10:17
A new study on climate change and geochemical process of waters and lake sediments on the Tibetan Plateau show that global warming affects geochemical processes such as glacier melting, soil erosion and sediments release. This deteriorates water quality of rivers and lakes, thus significantly impacting the lives of 40 percent of the world’s population living in the area.

Clams help date duration of ancient methane seeps in the Arctic

Science Daily - Wed, 02/10/2016 - 10:13
A bed of fossilized, methane dependent clams has for the first time been observed in the high Arctic. It tells the story of a thousand year long methane release event.

Clams help date duration of ancient methane seeps in the Arctic

Science Daily - Wed, 02/10/2016 - 10:13
A bed of fossilized, methane dependent clams has for the first time been observed in the high Arctic. It tells the story of a thousand year long methane release event.

How stable is the West Antarctic Ice Sheet?

Science Daily - Tue, 02/09/2016 - 10:01
A future warming of the Southern Ocean caused by rising greenhouse gas concentrations in the atmosphere may severely disrupt the stability of the West Antarctic Ice Sheet. The result would be a rise in the global sea level by several meters.

How stable is the West Antarctic Ice Sheet?

Science Daily - Tue, 02/09/2016 - 10:01
A future warming of the Southern Ocean caused by rising greenhouse gas concentrations in the atmosphere may severely disrupt the stability of the West Antarctic Ice Sheet. The result would be a rise in the global sea level by several meters.

How ice-shelf loss leads to faster sea-level rise: The shield is crumbling

Science Daily - Tue, 02/09/2016 - 09:54
Over the past 20 years, many ice shelves in Antarctica have shrunk and some have disappeared entirely. This has resulted in a significant acceleration of many Antarctic glaciers, contributing to rising sea levels. Researchers have used a complex model to show for the first time at what point the 'buttressing' role of ice shelves is impaired due to their decline.

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