Water frost additionally the stability from north and you will northeast Greenland drifting glaciers

Water frost additionally the stability from north and you will northeast Greenland drifting glaciers

The newest communication between ocean frost and glaciers has been examined to possess the latest drifting language regarding Nioghalvfjerdsfjorden glacier, northeast Greenland (79°30’N, 22° W). Information out of glacial geological degree, journey reports, aerial photo and satellite pictures is employed so you’re able to document new glacier front side standing and you may prompt-freeze criteria with the millennial so you can decadal time-balances. The studies indicate that the stability of the floating glacier margin is dependent on the clear presence of a preserving fast-frost safeguards prior to the glacier. Inside episodes that have a permanent fast-ice shelter, zero calving happens, however, once quick-frost crack-within the glacier reacts having an enormous calving hobby, wherein years of obtained glacier-ice flux unexpectedly vacations away. Climate-induced alter off sea-freeze conditions on the Snowy Sea with seasonal break-upwards of your own near-shore timely frost could lead to disintegration of floating glaciers. The present prominent mass losings of the base melting do up buddygays seznamka coming so you’re able to a large the amount be used more than because of the grounding-line calving out of icebergs. Nearby increase out-of fresh water from the north Greenland glaciers to your ocean will be shorter and local iceberg creation manage improve.


Submarine and you can satellite-mainly based observations inform you a significant reduced total of the total amount and density away from this new Cold water-ice protection in the last 20?3 decades ( Source Johannessen, Shalina and you can Miles Johannessen, 1999). In the event the continued, this may bring about a markedly other freeze-ocean-conditions regime from the Cold, because of the switching temperatures and you may bulk exchanges together with water stratification. This may dictate brand new glaciation of one’s residential property areas against the fresh new Cold oceans on account of changes away from snowfall buildup and you will/otherwise facial skin melting. not, change of one’s close-shore sea-ice conditions might have a further effect on the new house-depending glaciations. Quick frost was at present common across the rim of your Cold Sea. On big weather from northern and you can northeast Greenland, timely freeze can get build up in order to a considerable thickness and you may take off entry of fjords to own s Wadhams, 1981), influencing this new mass harmony of the glaciers in the region. At this time, of a lot outlet glaciers from the north and you can northeast Greenland circles out-of the fresh Greenland ice-sheet (inland freeze) try described as prolonged floating parts. The fresh semi-permanent water-ice safety generally seems to protect new drifting glacier tongues and suppresses him or her out-of disintegrating. The big bulk losings regarding the glaciers is via intensive base melting averaging several yards regarding ice per year ( Site Rignot, Gogineni, Krabill and you may Ekholm Rignot while others, 1997; Source Thomsen Thomsen although some, 1997; Resource Reeh, Mayer, Miller, Thomsen and you will Weidick Reeh while some, 1999a). The fresh resulting new-water supply with the ocean most likely takes on a crucial role when you look at the keeping the fresh new partial-permanent punctual-ice security ahead of the glaciers ( Site Mayer, Reeh, Jung-Rothenhausler, Huybrechts and Oerter ).

At present, losing by calving when it comes to crack-up of frontal the main glaciers from inside the kilometre-size of tabular freeze countries some 10s out of yards thick comprises simply half the full mass losings. The fresh new freeze isles float off the glacier fronts only if nearby sea freeze getaways upwards, an uncommon knowledge which under present weather conditions happens during the durations all the way to numerous age ( Resource Higgins Higgins 1989, Source Higgins 1991).

Nioghalvfjerdsfjorden Glacier

Correspondence anywhere between glaciers and you can sea frost could have been learned within Nioghalvfjerdsfjorden glacier, northeast Greenland (79°30’N, 22° W). The brand new glacier is about 80 kilometer much time and 21 kilometer wide midway down its size, broadening so you can on 29 kilometer from the head frost side. A northern part of glacier, 8 kilometer large, drainage on the fjord Dijmphna Sund west of Hovgaard 0 (Fig. 1). The latest outside ? 6 0 kilometer of your own glacier are afloat, which have a great grounding area close to the Greenland ice sheet close the fresh western part of the ice-dammed lake Blaso (Fig. 1).

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