Sentences with phrase «ice changes throughout»

Polyak et al. (2010) looked at Arctic sea ice changes throughout geologic history and noted that the current rate of loss appears to be more rapid than natural variability can account for in the historical record.

Not exact matches

Throughout most of the current geological era North America was a sheet of ice, but the global climate changed; mostly due to solar activity.

The finding provides insight into how radiation can change the chemistry of water ice throughout the solar system.

In addition to such ice changes — accelerated melting in Greenland, western Antarctica and from mountain glaciers throughout the world — scientists have improved their understanding of the atmosphere's workings.

In the study, researchers analyzed a series of transient Coupled General Circulation Model simulations forced by changes in greenhouse gases, orbital forcing, meltwater discharge and the ice - sheet history throughout the past 21,000 years.

The shifting coastline is a sobering reminder that Greenland's ice sheet is changing, as well, in ways that could have dramatic consequences throughout the rest of the world.

That's a process playing out throughout the Southern Ocean, but scientists don't have a good grasp on it or how sudden changes like the loss of a huge hunk of ice will alter carbon uptake.

Ice sheets have waxed and waned throughout Earth history in response to changes in temperature and insolation.

But in the context of what's happened in the last several years and throughout the satellite record, it's an indication that the Arctic sea ice cover is fundamentally changing.

There is no empirical evidence to support assertions and computer models that claim carbon dioxide drives climate change or to suggest that greenhouse gases have supplanted the complex natural forces that have produced big and little ice ages, floods and droughts, and stormy and quiescent periods throughout Earth's history.

Walt Meier, from the National Snow and Ice Data Center that collaborates in the measurements, said: «In the context of what's happened in the last several years and throughout the satellite record, it's an indication that the Arctic sea ice cover is fundamentally changing.&raqIce Data Center that collaborates in the measurements, said: «In the context of what's happened in the last several years and throughout the satellite record, it's an indication that the Arctic sea ice cover is fundamentally changing.&raqice cover is fundamentally changing.»

Rather, the ice core record shows clearly that changes in temperature precede changes in carbon dioxide throughout the glacial - interglacial cycle (Mudelsee, 2001), and that for the last half million years the climate system has oscillated in a self - limiting way between glacials and interglacials by about 6 deg.

-LSB-...] In fact, the global sea - ice record shows virtually no change throughout the past 30 years, because the quite rapid loss of Arctic sea ice since the satellites were watching has been matched by a near - equally rapid gain of Antarctic sea ice.

Visual inspection of the northern hemisphere sea - ice data [1] shows that there are periods of about a week in length having alternating greater and lesser rates of change throughout most of the year.

Less ice cover leads to more solar heating throughout the Arctic Ocean, and ocean photosynthesis increases as more light penetrates into the water, ultimately resulting in «changes at the base of the ocean food chain,» according to the video.

The report tracks patterns, changes, and trends of the global climate system, including: greenhouse gases; temperatures throughout the atmosphere, ocean, and land; cloud cover; sea level; ocean salinity; sea ice extent; and snow cover.

Scientists are finding that they are well distributed throughout their range and adapting well to changes in sea ice.

And why CO2 changes never preceded temperature changes throughout the ice core history.

«In the context of what's happened in the last several years and throughout the satellite record, it's an indication that the Arctic sea ice cover is fundamentally changing,» National Snow and Ice Data Center research scientist Walt Meier said in a statement in Auguice cover is fundamentally changing,» National Snow and Ice Data Center research scientist Walt Meier said in a statement in AuguIce Data Center research scientist Walt Meier said in a statement in August.

«Fs», the fixed SST forcing, is a combination of the flux change at the top of (and throughout) the atmosphere and of the global surface air temperature change after the forcing and with observed sea surface temperature (SST) and sea ice (SI) held fixed.

Several vulnerable elements in the climate system, such as continental ice sheets, Amazon rainforest, West African monsoon, and others, could be pushed towards abrupt or irreversible change if warming continues in a business - as - usual way throughout this century.