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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.

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.

Long-term picture offers little solace on climate change

Science Daily - Mon, 02/08/2016 - 10:30
Climate change projections that look ahead one or two centuries show a rapid rise in temperature and sea level, but say little about the longer picture. A new looks at the next 10,000 years, and finds that the catastrophic impact of another three centuries of carbon pollution will persist millennia after the carbon dioxide releases cease.

Long-term picture offers little solace on climate change

Science Daily - Mon, 02/08/2016 - 10:30
Climate change projections that look ahead one or two centuries show a rapid rise in temperature and sea level, but say little about the longer picture. A new looks at the next 10,000 years, and finds that the catastrophic impact of another three centuries of carbon pollution will persist millennia after the carbon dioxide releases cease.

Old trees reveal Late Antique Little Ice Age (LALIA) around 1,500 years ago

Science Daily - Mon, 02/08/2016 - 10:29
A dendroclimatologist and his fellow researchers were able for the first time to precisely reconstruct the summer temperatures in central Asia for the past 2,000 years. This was made possible by new tree-ring measurements from the Altai mountains in Russia. The results complement the climatological history of the European Alps, stretching back 2,500 years, that the research team has published in the past.

Old trees reveal Late Antique Little Ice Age (LALIA) around 1,500 years ago

Science Daily - Mon, 02/08/2016 - 10:29
A dendroclimatologist and his fellow researchers were able for the first time to precisely reconstruct the summer temperatures in central Asia for the past 2,000 years. This was made possible by new tree-ring measurements from the Altai mountains in Russia. The results complement the climatological history of the European Alps, stretching back 2,500 years, that the research team has published in the past.

Scientists map movement of Greenland Ice during past 9,000 years

Science Daily - Thu, 02/04/2016 - 14:09
Scientists have created the first map that shows how the Greenland Ice Sheet has moved over time, revealing that ice in the interior is moving more slowly toward the edges than it has, on average, during the past 9,000 years.

Scientists map movement of Greenland Ice during past 9,000 years

Science Daily - Thu, 02/04/2016 - 14:09
Scientists have created the first map that shows how the Greenland Ice Sheet has moved over time, revealing that ice in the interior is moving more slowly toward the edges than it has, on average, during the past 9,000 years.

DNA evidence uncovers major upheaval in Europe near end of last Ice Age

Science Daily - Thu, 02/04/2016 - 14:06
DNA evidence lifted from the ancient bones and teeth of people who lived in Europe from the Late Pleistocene to the early Holocene -- spanning almost 30,000 years of European prehistory -- has offered some surprises, according to researchers. Perhaps most notably, the evidence shows a major shift in the population around 14,500 years ago, during a period of severe climatic instability.

DNA evidence uncovers major upheaval in Europe near end of last Ice Age

Science Daily - Thu, 02/04/2016 - 14:06
DNA evidence lifted from the ancient bones and teeth of people who lived in Europe from the Late Pleistocene to the early Holocene -- spanning almost 30,000 years of European prehistory -- has offered some surprises, according to researchers. Perhaps most notably, the evidence shows a major shift in the population around 14,500 years ago, during a period of severe climatic instability.

In the Southern Ocean, a carbon-dioxide mystery comes clear

Science Daily - Wed, 02/03/2016 - 14:01
Twenty thousand years ago, low concentrations of carbon dioxide in the atmosphere allowed the earth to fall into the grip of an ice age. But despite decades of research, the reasons why levels of the greenhouse gas were so low then have been difficult to piece together. New research shows that a big part of the answer lies at the bottom of the world.

In the Southern Ocean, a carbon-dioxide mystery comes clear

Science Daily - Wed, 02/03/2016 - 14:01
Twenty thousand years ago, low concentrations of carbon dioxide in the atmosphere allowed the earth to fall into the grip of an ice age. But despite decades of research, the reasons why levels of the greenhouse gas were so low then have been difficult to piece together. New research shows that a big part of the answer lies at the bottom of the world.

Consistency of Earth's magnetic field history surprises scientists

Science Daily - Wed, 02/03/2016 - 12:44
Earth's magnetic field occasionally reverses its polarity -- the magnetic north and south poles swap places. When magnetic polarity remains stable in one orientation for more than 10 million years the interval is dubbed a 'superchron.' Within the last 540 million years there are three known superchron periods. New work identifies up to 10 additional superchrons over 1.3 billion years during the Proterozoic Eon, Earth's middle age, which occurred 2.5 to 0.54 billion years ago.

Consistency of Earth's magnetic field history surprises scientists

Science Daily - Wed, 02/03/2016 - 12:44
Earth's magnetic field occasionally reverses its polarity -- the magnetic north and south poles swap places. When magnetic polarity remains stable in one orientation for more than 10 million years the interval is dubbed a 'superchron.' Within the last 540 million years there are three known superchron periods. New work identifies up to 10 additional superchrons over 1.3 billion years during the Proterozoic Eon, Earth's middle age, which occurred 2.5 to 0.54 billion years ago.

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