Sentences with phrase «on ice mass balance»

Nicolas Bergeot from the Royal Observatory of Belgium talks about the interesting research on ice mass balance and Earth's geomagnetic field he and his colleagues are carrying out...

Nicolas Bergeot from the Royal Observatory of Belgium talks about the interesting research on ice mass balance and Earth's geomagnetic field he and his colleagues are carrying out at the Princess Elisabeth Antarctica research station.

Not exact matches

David Ullman, a postdoctoral researcher at Oregon State University and lead author on the study, said there are two mechanisms through which ice sheets diminish — dynamically, from the jettisoning of icebergs at the fringes, or by a negative «surface mass balance,» which compares the amount of snow accumulation relative to melting.

Detailed net mass balance of the ice plain on Ice Stream B, Antarctica: A GIS Approach, Journal of Glaciology, Vice plain on Ice Stream B, Antarctica: A GIS Approach, Journal of Glaciology, VIce Stream B, Antarctica: A GIS Approach, Journal of Glaciology, Vol.

Negative mass balances on tributary glaciers can lead to thinning of the glaciers and ice shelves.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

Overall, I estimate the mass balance of the Greenland ice sheet to be about -80 + / -10 cubic km of ice per year in 2000 and -110 + / -15 cubic km of ice per year in 2004, i.e. more negative than based on partial altimetry surveys of the outlet glaciers.

[Response: Surface mass balance on the ice sheets is a good example.

[Response: Rain on the flanks is not that uncommon, but enough rain on the bulk of the ice sheet to affect the surface mass balance as much as you suggest is not on.

So I had to back up the story of my trip to Alaska with satellite data on sea ice, and I had to justify my pictures of disappearing glaciers in the Andes with long - term records of mass balance of mountain glaciers.

The overall global glacier mass balance trend is shown on the National Snow and Ice Data Center (NDIS) graph here.

The findings reinforce suggestions that strong positive ice — temperature feedbacks have emerged in the Arctic15, increasing the chances of further rapid warming and sea ice loss, and will probably affect polar ecosystems, ice - sheet mass balance and human activities in the Arctic...» *** This is the heart of polar amplification and has very little to do with your stated defintion of amplifying the effects of warming going on at lower latitudes.

We quantify sea - level commitment in the baseline case by building on Levermann et al. (10), who used physical simulations to model the SLR within a 2,000 - y envelope as the sum of the contributions of (i) ocean thermal expansion, based on six coupled climate models; (ii) mountain glacier and ice cap melting, based on surface mass balance and simplified ice dynamic models; (iii) Greenland ice sheet decay, based on a coupled regional climate model and ice sheet dynamic model; and (iv) Antarctic ice sheet decay, based on a continental - scale model parameterizing grounding line ice flux in relation to temperature.

Annual net balance on eight North Cascades glaciers during the 1984 - 1994 period has been determined by measurement, of total mass loss from firn and ice melt and, of residual snow depth at the end of the summer season.

«A high - resolution record of Greenland mass balance» «Antarctica, Greenland and Gulf of Alaska land - ice evolution from an iterated GRACE global mascon solution» «Greenland and Antarctica ice sheet mass changes and effects on global sea level»

«(F) the cryosphere, including effects on ice sheet mass balance, mountain glacier mass balance, and sea - ice extent and volume;

Both the observations of mass balance and the estimates based on temperature changes (Table 11.4) indicate a reduction of mass of glaciers and ice caps in the recent past, giving a contribution to global - average sea level of 0.2 to 0.4 mm / yr over the last hundred years.

His presentation has some very interesting results on sea ice mass balance that are unpublished, which I didn't use, but I did include and some slides from Perovich's RS presentation illustrating some previously published field observations (labeled «courtesy of Don Perovich»).

The magnitude and importance of snowfall on ice sheet mass balance is illustrated by the story of Glacier Girl.

The key factor w / r / t sea - level rise is grounded ice mass balance, especially in the world's two (or three, depending on how you count) remaining large ice sheets: Greenland and Antarctica.

Secondary objectives: Four secondary objectives have been defined: - To assess the effect of a more accurate simulation of sea ice drift and deformation on the Arctic sea ice mass balance and distribution properties of sea ice age.

The most recent data from ice mass balance buoys in Storfjroden, Svalbard and on iceberg - fast ice in Fram Strait show that the melt season has started.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

Whether a glacier retreats or advances each year largely depends on its mass balance — the difference between how much snow it receives and the amount of its ice that melts away.

Just a short list: — you go on and on about SMB causing a net reduction of sea level in Antarctica (and sometimes Greenland), completely ignoring that SMB is not the total ice mass balance — you routinely mentioned that human emissions aren't increasing the CO2 concentration because those emissions didn't increase for several years in a row, but concentration did.

Only a detailed analysis of buoy data and field observations will help resolve this question, but an ice mass balance buoy placed on 1.4 meter thick first - year ice north of Barrow in April has managed to survive into the late melt season, drifting 1,000 kilometers to the North over the course of the summer.

The surface mass balance of the glacier is the difference of accumulating snow on the ice sheet (its income) and snow and ice losses from melting and calving (its expenditures).

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.

In fact, there are now well over 150 individual assessments of ice sheet mass balance based on measurements acquired by at least 15 different satellite missions.

Glacier mass balance is measured once or twice annually on numerous stakes on the several ice caps in Iceland by the National Energy Authority.

Annual mass balance is the difference between winter snow and ice accumulation on a glacier, and summer snow and ice loss from a glacier during a given year.

The papers do not address the total mass balance of the ice sheets, and the authors admit that the ablation at the edges may offset the gains on the interior.

To quote from AR5 WG1: «While surface melting will remain small, an increase in snowfall on the Antarctic ice sheet is expected (medium confidence), resulting in a negative contribution to future sea level from changes in surface mass balance.»

Padman, L., D. P. Costa, M. S. Dinniman, H. A. Fricker, M. E. Goebel, L. A. Huckstadt, A. Humbert, I. Joughin, J. T. M. Lenaerts, S. R. M. Ligtenberg, T. Scambos and M. R. van den Broeke «Oceanic controls on the mass balance of Wilkins Ice Shelf, Antarctica.»

These observations reveal a widespread, dynamic subglacial water system which may exert an important control on ice flow and mass balance.

Studies based on satellite observations do not provide unequivocal evidence concerning the mass balance of the East Antarctic ice sheet; some appear to indicate marginal thickening (Davis et al., 2005), while others indicate little change (Zwally et al., 2005; Velicogna and Wahr, 2006; Wingham et al., 2006).