Massive destabilization of an Arctic ice cap - ScienceDirect
2018年11月15日 · Here we present the first observations of an outlet glacier at a largely cold-based ice cap, the Vavilov Ice Cap on October Revolution Island, Severnaya Zemlya archipelago in the Russian High Arctic [Fig. 1], that is undergoing extraordinary acceleration and thinning but displays no previous surface evidence of surging (Dowdeswell and Williams ...
Severe cloud contamination of MODIS Land Surface Temperatures …
2014年2月25日 · Austfonna is a ~ 7800 km 2 ice cap centered at 80° north, 24° east on the island Nordaustlandet, northeast Svalbard in the Norwegian Arctic (Moholdt & Kääb, 2012). The ice cap has a simple domed shaped geometry gently rising from sea level up to the summit at approximately 800 ma.s.l. ( Moholdt, Hagen, Eiken, & Schuler, 2010 ).
Massive destabilization of an Arctic ice cap - ScienceDirect
2018年11月15日 · Ice caps that are mostly frozen at the bedrock-ice interface are thought to be stable and respond slowly to changes in climate. We use remote sensing to measure velocity and thickness changes that occur when the margin of the largely cold-based Vavilov Ice Cap in the Russian High Arctic advances over weak marine sediments. We show that cold ...
Recent melt rates of Canadian arctic ice caps are the highest in …
2012年3月1日 · There has been rapid acceleration in Canadian Arctic ice-cap melt rates since 1995. Melt series correlate well with Devon net mass balance. Last quarter century has seen the highest melt in two millennia. The Agassiz ice-cap melt over the last 25 years highest melt in 4200 years. The Agassiz melt rates since the middle 1990s resemble those 9000 years ago.
Neoglacial ice expansion and late Holocene cold-based ice cap …
2014年5月1日 · In many Arctic regions with polythermal ice coverage, records of past ice cap expansion preserved in dead vegetation are currently being exposed along rapidly receding cold-based ice margins. The dead vegetation is composed of delicate subfossilized mosses, liverworts, willow leaves, and lichens, which are quickly eroded by wind and slope wash.
Holocene evolution of Hans Tausen Iskappe (Greenland
2017年7月15日 · During the Holocene Thermal Maximum (HTM) the southern part of the ice cap is modelled to collapse, while the northern part of the ice cap survived this warmer period. The late Holocene regrowth of the ice cap to its maximum Neoglacial extent at the end of the Little Ice Age (LIA) can be reproduced from the temperature reconstruction. The ...
Severe cloud contamination of MODIS Land Surface
2014年2月25日 · Austfonna is a ~ 7800 km 2 ice cap centered at 80° north, 24° east on the island Nordaustlandet, northeast Svalbard in the Norwegian Arctic (Moholdt & Kääb, 2012). The ice cap has a simple domed shaped geometry gently rising from sea level up to the summit at approximately 800 ma.s.l. (Moholdt, Hagen, Eiken, & Schuler, 2010).
Levels and distribution profiles of Per- and ... - ScienceDirect
2023年5月1日 · Remote ice cores spanning several years have already been used to elucidate atmospheric sources of PFAS on the Devon Ice Cap and Mt. Oxford icefield in the Canadian Arctic (Pickard et al., 2020; Pickard et al., 2018). Unlike long-term atmospheric monitoring studies, ice cores can help to retrospectively investigate atmospheric processes and ...
Changes in elevation and mass of Arctic glaciers and ice caps, …
2021年8月1日 · From these data, we produce a pan-Arctic assessment of GIC mass imbalance, and we partition their losses into signals associated with atmospheric processes and glacier dynamics. Between 2010 and 2017, Arctic GIC lost 609 ± 7 Gt of ice, contributing 0.240 ± 0.007 mm per year to global sea level rise. While surface ablation is responsible for ...
Holocene glacial history of Renland Ice Cap, East Greenland ...
2021年4月15日 · Here, in order to document past ice fluctuations and to afford data with which to test hypotheses concerning the spatial and temporal pattern of climate cycles in the Arctic, we reconstructed variations in the past extent of the southern margin of Renland Ice Cap, East Greenland, using a combination of glacial mapping and analysis of sediments ...