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Antarctic has seen widespread change in last 50 years, moss study reveals

Science Daily - Thu, 05/18/2017 - 13:03
In 2013, researchers studying mosses and microbes growing at the southern end of the Antarctic Peninsula documented unprecedented ecological change over the last 50 years, driven by warming temperatures. Now, the same research group has confirmed that those striking changes in the Antarctic are widespread, occurring all across the Peninsula.

A recipe for concrete that can withstand road salt deterioration

Science Daily - Thu, 05/18/2017 - 09:41
Engineers have known for some time that calcium chloride salt, commonly used as deicer, reacts with the calcium hydroxide in concrete to form a chemical byproduct that causes roadways to crumble. A civil engineer is working on a new recipe for concrete, using cast-off products from furnaces, that can hold its own against the forces of chemical erosion.

Temperatures in the Arctic are

Science Daily - Thu, 05/18/2017 - 07:30
Temperatures in the Arctic are increasing twice as fast as in the rest of the globe, while the Antarctic is warming at a much slower rate. A new study shows that land height could be a 'game changer' when it comes to explaining why temperatures are rising at such different rates in the two regions.

Earth's atmosphere more chemically reactive in cold climates

Science Daily - Wed, 05/17/2017 - 12:26
A Greenland ice core providing a first glimpse at the history of reactive oxidants shows that for big temperature swings in the past 100,000 years, reactive oxidants are actually higher in cold climates. This means that new mechanisms -- not just water vapor, plant and soil emissions -- must affect the concentration of ozone and other oxidants in the atmosphere.

Porewater salinity: Key to reconstructing 250,000 years of Lake Van’s history

Science Daily - Tue, 05/16/2017 - 08:11
The sediments of Lake Van in Eastern Anatolia (Turkey) are a valuable climate archive. Now, using the salinity measured in sediment porewater, scientists have reconstructed the huge lake-level fluctuations that occurred over the past 250,000 years. This approach – based on simple physical concepts – is likely to be more widely applied in the future.

NASA's EPIC view spots flashes on Earth

Science Daily - Mon, 05/15/2017 - 12:30
One million miles from Earth, a NASA camera is capturing unexpected flashes of light reflecting off our planet.

Saying goodbye to glaciers

Science Daily - Thu, 05/11/2017 - 13:19
Glaciers around the world are disappearing before our eyes, and the implications for people are wide-ranging and troubling, a glacier expert concludes in a new study.

Teleconnection between the tropical Pacific and Antarctica

Science Daily - Thu, 05/11/2017 - 08:50
The higher the seawater temperature in the tropical Pacific, the more likely ice breakup will occur in East Antarctica, according to researchers.

Irreversible ocean warming threatens the Filchner-Ronne Ice Shelf

Science Daily - Thu, 05/11/2017 - 08:50
By the second half of this century, rising air temperatures above the Weddell Sea could set off a self-amplifying meltwater feedback cycle under the Filchner-Ronne Ice Shelf, ultimately causing the second-largest ice shelf in the Antarctic to shrink dramatically.

Shelf sediments reveal climate shifts through the eons

Science Daily - Wed, 05/10/2017 - 16:49
Climate change around Antarctica can severely affect Australia's rainfall and even influence the distribution of wet and dry zones across southeast Asia, an international study has revealed.

Glaciers rapidly shrinking and disappearing: 50 years of glacier change in Montana

Science Daily - Wed, 05/10/2017 - 12:19
The warming climate has dramatically reduced the size of 39 glaciers in Montana since 1966, some by as much as 85 percent. On average, the glaciers have reduced by 39 percent and only 26 glaciers are now larger than 25 acres, which is used as a guideline for deciding if bodies of ice are large enough to be considered glaciers.

How do snowflakes form? Chemist sees ice crystal formation in new light

Science Daily - Wed, 05/10/2017 - 12:19
New research by chemist has shed new light on ice crystal formation by combining an electron backscatter with a large single crystal ice model. Scientists discovered that an ice crystal's flat sides are formed by a hexagon that is larger and consists of a central water molecule surrounded by six others in the same layer.

African lions under same threats as extinct sabre-toothed tigers faced

Science Daily - Wed, 05/10/2017 - 10:52
African lions are under the same threats extinct sabre-toothed tigers faced.

Rising temperatures threaten stability of Tibetan alpine grasslands

Science Daily - Wed, 05/10/2017 - 06:55
A warming climate could affect the stability of alpine grasslands in Asia's Tibetan Plateau, threatening the ability of farmers and herders to maintain the animals that are key to their existence, and potentially upsetting the ecology of an area in which important regional river systems originate, says a new study.

Oversized landforms discovered beneath the Antarctic ice sheet

Science Daily - Tue, 05/09/2017 - 08:35
Scientists have now discovered an active hydrological system of water conduits and sediment ridges below the Antarctic ice sheet.

Different places warm at different paces

Science Daily - Tue, 05/09/2017 - 07:39
One of the robust features of global warming under increasing greenhouse gas concentrations is that different places warm at different paces. It turns out that the fast warming in each region has its own cause. Ocean heat transport links subpolar and Arctic warming, but that is not the whole story.

Growth of East Antarctic Ice Sheet was less than previously suggested

Science Daily - Fri, 05/05/2017 - 09:36
Scientists have known for over a decade that the West Antarctic Ice Sheet has been losing mass and contributing to sea level rise.

Antarctic study shows central ice sheet is stable since milder times

Science Daily - Fri, 05/05/2017 - 09:36
Central parts of Antarctica's ice sheet have been stable for millions of years, from a time when conditions were considerably warmer than now, research suggests.

Policies to curb short-lived climate pollutants could yield major health benefits

Science Daily - Thu, 05/04/2017 - 15:14
A commitment to reducing global emissions of short-lived climate pollutants (SLCPs) such as methane and black carbon could slow global warming while boosting public health and agricultural yields, aligning the Paris Climate Agreement with global sustainable development goals, a new analysis by an international panel of scientists shows.

Decades of data on world's oceans reveal a troubling oxygen decline

Science Daily - Thu, 05/04/2017 - 09:43
The amount of dissolved oxygen contained in the water -- an important measure of ocean health -- has been declining for more than 20 years, reveals a new analysis of decades of data on oceans across the globe.


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