Sentences with phrase «ice discharge at»

The data indicated that large glaciers can alter their ice discharge at timescales less than a decade, much faster than previously thought (Joughin et al. 2004).

Thus, could ice discharge at Greenland destabilise ice in Antarctica?

Not exact matches

Publication: Antarctic ice shield discharge driven by atmosphere - ocean feedbacks at the Last Glacial Termination, DOI: 10.1038 / srep39979

Freshening of the ocean can result from numerous factors — the melting of ice, freshwater discharge from rivers, or increased precipitation at high latitudes.

Hunter and Brown calculated an average acceleration in the central projection of the IPCCs AR4 A1FI emission scenario (including scaled - up ice sheet discharge) of 0.002 mm per year over the period 1990 — 2010 (see the value plotted at 2000 in their Fig. 1, ref.

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.

We assess atmospheric versus oceanic influences on glacial discharge at this location, using analyses of diatom geochemistry to reconstruct atmospherically forced glacial ice discharge and diatom assemblage ecology to investigate the oceanic environment.

In the future, high - end estimates of ice discharge and regional effects, such as local thermal expansion and coastal subsidence, place the upper limits of relative sea - level rise for the Netherlands at 0.65 to 1.3 m by 2100, excluding gravitational effects.

Scenarios of deglaciation (Meehl et al., 2007 Section 10.7.4.4) assume that any such increase would be outweighed by accelerated discharge of ice following weakening or collapse of an ice shelf due to melting at its surface or its base (*).

Loss of glacial volume in Alaska and neighboring British Columbia, Canada, currently contributes 20 % to 30 % as much surplus freshwater to the oceans as does the Greenland Ice Sheet — about 40 to 70 gigatons per year, 66,78,63,57,64,58 comparable to 10 % of the annual discharge of the Mississippi River.79 Glaciers continue to respond to climate warming for years to decades after warming ceases, so ice loss is expected to continue, even if air temperatures were to remain at current leveIce Sheet — about 40 to 70 gigatons per year, 66,78,63,57,64,58 comparable to 10 % of the annual discharge of the Mississippi River.79 Glaciers continue to respond to climate warming for years to decades after warming ceases, so ice loss is expected to continue, even if air temperatures were to remain at current leveice loss is expected to continue, even if air temperatures were to remain at current levels.

Scientists have recently observed major changes in these glaciers: several have broken up at the ocean end (the terminus), and many have doubled the speed at which they are retreating.2, 5 This has meant a major increase in the amount of ice and water they discharge into the ocean, contributing to sea - level rise, which threatens low - lying populations.2, 3,5 Accelerated melting also adds freshwater to the oceans, altering ecosystems and changing ocean circulation and regional weather patterns.7 (See Greenland ice sheet hotspot for more information.)

It is driven by poorly understood processes occurring at the ice - ocean interface, such as subglacial discharge into the ocean, turbulent plume dynamics, submarine melting, and iceberg calving.

The floating ice shelf at the glacier's tip has been melting and thinning for the past four decades, causing the glacier to speed up and discharge more ice.

«The 14.7 ka b2k event followed Heinrich event H1 at a time when the ice sheets in the North were still extensive whereas the North was more deglaciated at 11.7 ka b2k (34), reducing the amount of ice discharge available to change the density of North Atlantic ocean waters and thereby the THC before the warming onset.»

We see that the new estimate is about 60 % higher than the old standard estimate, and also a lot higher than the AR4 attempt at including rapid ice sheet discharge.

I can only list a few regular «goings on'that I KNOW affect sea level; I'm certain that there are others: Change in overall temperature of the oceans (a few millidegrees / mm), plate tectonics, slit from rivers, erosion of seashores, extraction of ground water which ultimately returns to the oceans, marine life and its products building up the ocean floors, melting land ice, undersea discharges of a variety of «stuff» from literally hundreds of thousands of sources, often at temperatures in the 1 - 2 thousand degree range, which we are only now beginning to notice, wind carrying dust from the land and dropping it on the ocean.