Sentences with phrase «past volume of ice»

Scientists estimate the past volume of ice - sheets in the following way: As water freezes, different isotopes (types of chemicals) tend to freeze out at different rates.

Not exact matches

In fact, for temperature the major step toward the ice ages that have characterised the past two to three million years was a cooling event at 2.7 million years ago, but for ice - volume the crucial step was the development of the first intense ice age at around 2.15 million years ago.

During a record melting jag this past summer, the Greenland ice sheet lost 552 billion tons (19 billion tons lower than the previous low), and the volume of sea ice fell to half the volume it had four years ago.

There has been a lot of discussion over the past few years on the use of sea ice volume as a better index than sea ice extent for use in Outlooks.

Already 80 per cent by volume of summer sea - ice has been lost, and regional warming of up to 5 ˚C may have already pushed the Greenland ice - sheet past its tipping point.

It sounds like you have no clue about the details of sea ice loss over the past few decades, nor the most critical of all the metrics — see ice volume, which is directly impacted by the warmth of both the ocean water as well as the atmosphere.

In just the past 5 years the minimum volume of ice in the Arctic was slashed in half.

But he also noted, «There is some indication from the QuickScat data that 2nd and 3rd year ice has increased somewhat in the past couple of years which may imply not so linear decline of arctic ice volume.»

6) There are still insufficient observations of ice thickness to quantify the basin - wide and long - term rate of ice - volume change over the past several decades.