Sentences with phrase «driven ice sheet changes»

It matters whether the forcing agent is GHG or tectonic activity or orbit - driven ice sheet changes.

Not exact matches

Climate change is driving the Greenland Ice Sheet to melt, which is contributing to sea level rise.

While some may see evidence of rapid glacier thinning in the past and again today as evidence that the West Antarctic Ice Sheet is nearing a collapse driven by human - caused climate change, Steig said at this point, scientists just don't know whether that is the case.

We determine that this difference is driven by the growth and retreat of large continental ice sheets that are present in the cold ice - age climates; these ice sheets reflect a lot of sunlight and their growth consequently amplifies the impact of CO2 changes.»

«Thus the increased snowfall we report here has not led to thickening of the ice sheet, but is in fact another symptom of the changes that are driving contemporary ice sheet loss.»

Slow feedbacks, such as change of ice sheet area and climate - driven changes of greenhouse gases, are not included.

Here we show that fluctuations in Antarctic Ice Sheet discharge caused by relatively small changes in subsurface ocean temperature can amplify multi-centennial climate variability regionally and globally, suggesting that a dynamic Antarctic Ice Sheet may have driven climate fluctuations during the Holocene.

It seems that every day scientists are telling us how climate change is causing the Antarctic ice sheet to melt, threatening to raise sea levels and drive the region's iconic penguins into extinction.

The ice ages appear to relate to a change in that ice sheet driven by variations in the earth's orbit.

Although the surface of the Greenland ice sheet can react rapidly to day - to - day weather changes, the melting of the volume of ice below is actually an inert process — driven by climatic changes instead of single meteorological events.

Presenting such alternative figures confuses and undermines the public understanding of the actual science, which is an understanding about the driving mechanisms of sea level rise: thermal expansion of ocean water, melting of mountain glaciers and complex dynamics of large ice sheets — in correspondence again with projected temperature rise, that is in turn a product of projected rises of greenhouse gas concentrations using calculated estimates of climate sensitivity, together creating a net disturbance in Earth's energy balance, the very root cause of anthropogenic climate change.

The observed effects of cryosphere reduction include modification of river regimes due to enhanced glacial melt, snowmelt advance and enhanced winter base flow; formation of thermokarst terrain and disappearance of surface lakes in thawing permafrost; decrease in potential travel days of vehicles over frozen roads in the Arctic; enhanced potential for glacier hazards and slope instability due to mechanical weakening driven by ice and permafrost melting; regional ocean freshening; sea - level rise due to glacier and ice sheet shrinkage; biotic colonisation and faunal changes in deglaciated terrain; changes in freshwater and marine ecosystems affected by lake - ice and sea - ice reduction; changes in livelihoods; reduced tourism activities related to skiing, ice climbing and scenic activities in cryospheric areas affected by degradation; and increased ease of ship transportation in the Arctic.

However, detecting acceleration is difficult because of (i) interannual variability in GMSL largely driven by changes in terrestrial water storage (TWS)(7 ⇓ — 9), (ii) decadal variability in TWS (10), thermosteric sea level, and ice sheet mass loss (11) that might masquerade as a long - term acceleration over a 25 - y record, (iii) episodic variability driven by large volcanic eruptions (12), and (iv) errors in the altimeter data, in particular, potential drifts in the instruments over time (13).

from Rahmstorf: Some of the AMOC's disruption may be driven by the melting ice sheet of Greenland, another consequence of climate change that is altering the region's water composition and interrupts the natural processes.

Quigley: «The ice sheet and gas changes tend to follow temperature change, because a warmer planet melts ice and drives gases into the air.