Sentences with phrase «by huge ice sheets»

Not exact matches

The icebergs that find their way into the paths of transatlantic liners come down from the coast of Greenland; for the interior of Greenland is a huge ice sheet fringed by mountains and promontories.

During the last ice age, much of North America was covered by a giant ice sheet that many scientists believe underwent several catastrophic collapses, causing huge icebergs to enter the North Atlantic — phenomena known as Heinrich events.

The beginning of the last glacial period was characterized in the Northern hemisphere by significant accumulation of snow at high latitudes and the formation of a huge polar ice sheet.

We have fairly high confidence that we observe the history of Heinrich events (huge discharges of ice - rafted debris from the Laurentide ice sheet through Hudson Bay that are roughly coincident with large southern warming, southward shift of the intertropical convergence zone, extensive sea ice in the north Atlantic, reduced monsoonal rainfall in at least some parts of Asia, and other changes), and also cold phases of the Dansgaard / Oeschger oscillations that lack Heinrich layers and are characterized by muted versions of the other climate anomalies I just mentioned.

Some programs were huge, mobilizing cooperation among a dozen or more nations to provide data from weather stations, research ships, and (by far the most expensive) satellites to monitor temperatures, clouds, ocean currents, ice sheets and more.

The new results indicate that the similar and seemingly unstoppable melting of huge swaths of the West Antarctic Ice Sheet (WAIS) today by relatively warm ocean waters has precedent in an earlier era, members of the research team and other scientists said.

These authors postulated an extended Barents Sea Ice Sheet, the western part of the huge Eurasian Ice Sheet51, 55, that had reached the shelf edge causing polynya - like open - water conditions (triggered by strong katabatic winds) with phytoplankton and sea ice algae production, subglacial meltwater outflow and the deposition of suspended material on the slope at site PS2138 -Ice Sheet, the western part of the huge Eurasian Ice Sheet51, 55, that had reached the shelf edge causing polynya - like open - water conditions (triggered by strong katabatic winds) with phytoplankton and sea ice algae production, subglacial meltwater outflow and the deposition of suspended material on the slope at site PS2138 -Ice Sheet51, 55, that had reached the shelf edge causing polynya - like open - water conditions (triggered by strong katabatic winds) with phytoplankton and sea ice algae production, subglacial meltwater outflow and the deposition of suspended material on the slope at site PS2138 -ice algae production, subglacial meltwater outflow and the deposition of suspended material on the slope at site PS2138 - 2.

To leap from that to the claimed 3 - 7ºC warming requires that the changes in the ice sheets and vegetation arising from the current and (medium term) committed warming would increase the radiative imbalance by another ~ 2 W / m2 — and that is extreme (for reference, the changes between the last ice age and now from these factors is only about 4 W / m2 (Kohler et al, 2010) with the huge impact of the N. American and European ice sheets included).