Sentences with phrase «ice discharge by»

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120013495.pdf During 2003 to 2008, the mass gain of the Antarctic ice sheet from snow accumulation exceeded the mass loss from ice discharge by 49 Gt / yr (2.5 % of input), as derived from ICESat laser measurements of elevation change.

Mass Gains of the Antarctic Ice Sheet Exceed Losses http://ntrs.nasa.gov/search.jsp?R=20120013495 SCAR ISMASS Workshop, July 14, 2012 «During 2003 to 2008, the mass gain of the Antarctic ice sheet from snow accumulation exceeded the mass loss from ice discharge by 49 Gt / yr (2.5 % of input), as derived from ICESat laser measurements of elevation change

Although Zwally calculated the net «mass gains from snow accumulation exceeded losses from ice discharge by about 112 and 82 Gt / year respectively during the 1992 - 2001 and 2003 - 08 measurement periods», he also reported that the rate of ice loss along the west Antarctic coast and the peninsula had increased from 64 GT / year to 135 GT / year during those same periods.

Not exact matches

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.

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

A recent study by Mouginot and colleagues detected acceleration and increased ice discharge.

From 2008 to 2015, continent - wide rates of ice discharge increased by about 36 billion tons per year.

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.

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.

The environmental changes brought on by ocean acidification could pose a significant threat to Arctic ecosystems that are already facing challenges from changes in sea ice distribution, warming and increased freshwater discharge.

Ice discharge is controlled by three major factors: ice thickness, glacier valley shape and ice velociIce discharge is controlled by three major factors: ice thickness, glacier valley shape and ice velociice thickness, glacier valley shape and ice velociice velocity.

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 (*).

These approaches, however, haven't taken into account some physical processes that can quickly increase ice sheet discharge, such as the collapse of terminal ice cliffs and the breakup of floating ice shelves caused by a process known as hydrofracturing.

Ice, Cloud and land Elevation Satellite (ICESat) data (2003 — 08) show mass gains from snow accumulation exceeded discharge losses by 82 ± 25 Gt a − 1, reducing global sea - level rise by 0.23 mm a − 1.

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.

... Most projections for the Antarctic Ice Sheet since IPCC AR5 limit the sea - level contribution as a result of dynamic discharge and the potential onset of the marine ice sheet instability to 0.3 m by the end of this centuIce Sheet since IPCC AR5 limit the sea - level contribution as a result of dynamic discharge and the potential onset of the marine ice sheet instability to 0.3 m by the end of this centuice sheet instability to 0.3 m by the end of this century.

The recent, marked increase in ice discharge from many of Greenland» slarge outlet glaciers has upended the conventional view that variations in ice - sheet mass balance are dominated on short time scales by variations in surface balance, rather than ice dynamics.

The modest increase in ice discharge over the past 7 years is contrasted by high rates of ice sheet mass loss and distinct spatial patters of elevation lowering.

The thermocline adjacent in the sea adjacent to the glacier calving front (where ice is discharged) lowered by 250 meters in the austral summer of 2012.

While these streams appear buttressed by the shelves in front of them, it is currently unknown whether a reduction or failure of this buttressing of relatively limited areas of the ice sheet could actually trigger a widespread discharge of many ice streams and hence a destabilisation of the entire West Antarctic Ice Sheice sheet could actually trigger a widespread discharge of many ice streams and hence a destabilisation of the entire West Antarctic Ice Sheice streams and hence a destabilisation of the entire West Antarctic Ice SheIce Sheet.

From this point our WV molecule can, by hapstance, either re-evaporate with a recharge of thermal energy, or discharge (with greater temperature reduction and another loss of «radiant energy» during «change of phase») further to ice.

Pepijn Bakker and colleagues combine observational records of iceberg - rafted debris with climate models to show that the climate fluctuations seen during the Holocene may have been driven by small variations in the discharge of freshwater from the Antarctic Ice Sheet, amplified through the climate system.

Such accelerated flow leads to increased ice discharge into the ocean, but the relevant dynamical processes are not properly understood nor included in continental ice - sheet models, the main difficulty being the treatment of grounding - line migration in response to increased melting of ice by the ocean.

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