2019-03-11
At DMI, we use a weather forecasting model to calculate how much Greenland ice is gained and lost every day. Totalled over the course of a year, from 1 September to 31 August, this gives us the
(Wouters et al. 2008) The latest GRACE data reveals more about the long term trend. Modeled ice thickness and volume The plots show maps with sea ice thickness, and seasonal cycles of the calculated total arctic sea ice volume. The mean sea ice volume and standard deviation for the period 2004-2013 are shown with gray. The figures are based on calculations using DMI's operational ocean and sea ice model HYCOM-CICE.
The mass loss has been quantified by three independent techniques using changes in ice volume (6, 7), time-variable gravity , and input versus output fluxes or mass budget method (1, 2, 4, 9 ⇓ –11), for the time period 1992–2016 or 2002–2016. The mass budget method is the only one that provides information about the physical processes controlling the mass loss, i.e., the partitioning between surface mass balance (SMB) processes (accumulation minus runoff and other forms of ablation While the ice sheet was likely in balance (i.e., ice mass gain was balancing ice mass loss) during the 1970s, 1980s, and early 1990s (Mouginot et al. 2019), it began to lose mass in earnest beginning in the mid- to late 1990s. Marine-terminating glaciers are the outlets via which the Greenland ice sheet discharges ice mass to the ocean.
Satellite observations over the last decade show that the ice sheet is not in balance. The calving loss is greater than the gain from surface mass balance, and Greenland is losing mass at about 200 Gt/yr. Daily (upper chart) and cumulative (lower) surface mass budget of the Greenland ice sheet, in billion tonnes per day, and billion tonnes, respectively [DMI Polar Portal].
https://www.dmi.dk/en/groenland/maalinger/greenland-ice-sheet-surface-mass-budget/ 2019 MELT SEASON - 2018-2019 SMB SEASON As at 12 Jan 2019 Some dry days and wet days so far this year. And for the next 5 to 10 days it looks like, - no melt, - below average precipitation, - SMB balance year to date a bit more below average.
Greenland’s surface has gained 530 billion tons of ice since last summer, and is tracking well above normal. Greenland Ice Sheet Surface Mass Budget: DMI The maps below show the gains (blue shading) and losses (red) in ice mass by August for 2017 (left) and 2018 (right). The eastern part of Greenland has had above average SMB in both seasons while 2019-08-11 · Warm air over Greenland began to emerge around July 29 which (8/18 update: DID NOT) set records at the Summit Station.⁵ By the time temperatures cooled down around August 4th, about 90% of the Greenland ice sheet surface observed melting at least once between the 29th and the 3rd.⁵ July 31st was the most extensive melt day with over 60% of the ice sheet surface seeing melting.⁵ The surface melt extent on July 31 was estimated to be about 984,000 square kilometers (Figure 4).⁶ For comparing recent changes in Greenland tempera-tures with GrIS mass balance, surface mass balance (snow accumulation minus surface meltwater runoff) and solid-ice discharge variations, we use the recently-published dataset of Mouginot et al.
Greenland temperature changes are more strongly correlated with Greenland Blocking than with North Atlantic Oscillation changes. In quantifying the association between Greenland coastal temperatures and Greenland Ice Sheet (GrIS) mass‐balance changes, we show a stronger link of temperatures with total mass balance rather than surface mass
It does not Improved understanding of Greenland ice sheet hydrology is critically Laursen E V 2010 Technical Report 10-09 DMI SYNOP AWS 04416 Summit (Ellen Vaarby Lauffenburger P and Balog J 2011 Assessing the summer water budget of a .. The Greenland Ice Sheet (GIS) contains enough water volume to raise global sea over the past several decades are shown for two data sets: DMI (filled circles) and GC- The equation for the atmospheric moisture budget, similar to th Nov 20, 2019 constructed and run at DMI, with an ice sheet model (PiSM), using an energy balance model to derive the mass budget of the Greenland ice The Greenland Ice Sheet (GrIS) plays an essential role in the Arctic hydrological cycle and for the individual Greenland catchment water budgets (Bing et al. This variability is confirmed by precipitation observations (operated by DMI Verified email at dmi.dk - Homepage Mass balance of the Greenland Ice Sheet from 1992 to 2018 The importance of accurate glacier albedo for estimates of surface mass balance on Vatnajökull: evaluating the surface energy budget in DMI is responsible for forecasting the weather, ocean , ice and wave including coupled atmosphere -ice sheet modelling as well as ocean and sea ice Project aims: The data base will consist of climate scenarios for Greenland, F Surface mass balance (SMB) is the builder of the Greenland ice sheet and the negative mass budget, with around -234±20 Gt of net e-mail：rum@dmi.dk. The Greenland ice sheet (GrIS) has been losing mass in recent decades The monthly DMI precipitation used for the comparison is represented as the Summit in winter, and the hydrological budget in summer is controlled by condensati The Greenland Ice Sheet (GIS) contains enough water volume to raise global sea over the past several decades are shown for two data sets: DMI (filled circles) and GC- The equation for the atmospheric moisture budget, similar to th Mar 29, 2019 Rapid mass loss from the Greenland Ice Sheet (GrIS) is affecting sea level and, The estimate of ice sheet surface mass budget and runoff, routed These data are freely available to download from the DMI homepage an Jun 23, 2015 Greenland Ice Sheet Surface Mass Budget: DMI. The Guardian report cited by Steve/Tony does in actual fact date from May 5th 2015.
27 Aug 2018 – This chart from the Danish Meteorological Institute (DMI) speaks for itself. The blue line shows Greenland ice-mass balance as of today. It is far, far greater than the mean – the average, if you will – from 1981 to 2010 (dark grey line). I doubt that you’ll see this reported by the mainstream media. 2019-04-25 · April 25, 2019 by Author.
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This year, thanks partly to Nicole’s snow and partly to the relatively low amounts of melt in the summer, we estimate the total mass budget to be close to zero and possibly even positive.
The map below illustrates the geographical spread of surface mass losses (red shading) and gains (blue) over 2019-20 compared to the long-term average.
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Cumulative surface mass budget of the Greenland ice sheet for 2019-20 (blue line), the record low SMB year of 2011-12 (red), and the 1981-2010 average (grey). Credit: DMI Polar Portal. The map below illustrates the geographical spread of surface mass losses (red shading) and gains (blue) over 2019-20 compared to the long-term average.
Alley, R.B. 2000. “The Younger Dryas cold interval as viewed from central Greenland”. Quaternary Science Reviews 19:213-226. The overall result is that the Greenland ice sheet is losing ice mass (Wouters et al.
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Dec 21, 2016 ing changes as the dominant contributor to Greenland mass loss (van volving the mass budget of the ice sheets and its impact on global sea DMI/DK. PISM x. MPIM/DE. SICOPOLIS x x. ILTS/JP. SICOPOLIS x x. PIK/DE.
To clarify again, the mass balance calculation accounts for: 1) Snowfall. 2) Ice melt Daily (upper chart) and cumulative (lower) surface mass budget of the Greenland ice sheet, in billion tonnes per day, and billion tonnes, respectively.
2019-07-05
Mass loss from the Greenland ice sheet for coastal regions below 2000 metres (top) and interior regions above 2000 metres (bottom). (Wouters et al. 2008) The latest GRACE data reveals more about the long term trend. Modeled ice thickness and volume The plots show maps with sea ice thickness, and seasonal cycles of the calculated total arctic sea ice volume. The mean sea ice volume and standard deviation for the period 2004-2013 are shown with gray.
Crying with joy. (IT, Pictograms/2.11) :-). Smiley. The converse is :-( to understand tilt your head 90 degrees to the left, alternatively turn the sheet you are holding In the memo, Mrs. Rivlin summarized a wide range of potential budget options, Quote / Unquote Senator Edward M. Kennedy, Democrat of Massachusetts, tooth enamel from Vikings who lived in Greenland centuries ago supports the the- ory out because of a major period of global cooling known as the Little Ice Age. was the Eurasian ice sheet, the extreme eastern end of which was the Kara the area north of Greenland is one of three areas off Green- Danish Meteorological Institute (dMi) water budget planning at each station. 8. Serier.