气候变化领域集成服务门户(CCPortal): Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014

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DOI	10.5194/tc-9-1535-2015
	Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014
	Papasodoro C.; Berthier E.; Royer A.; Zdanowicz C.; Langlois A.
发表日期	2015
ISSN	19940416
卷号	9 期号:4
英文摘要	Grinnell and Terra Nivea Ice Caps are located on the southern Baffin Island, Nunavut, in the Canadian Arctic Archipelago. These relatively small ice caps have received little attention compared to the much larger ice masses further north. Their evolution can, however, give valuable information about the impact of the recent Arctic warming at lower latitudes (i.e. ∼ 62.5° N). In this paper, we measure or estimate historical and recent changes of area, elevation and mass of both ice caps using in situ, airborne and spaceborne data sets, including imagery from the Pléiades satellites. The area of Terra Nivea Ice Cap has decreased by 34 % since the late 1950s, while that of Grinnell Ice Cap has decreased by 20 % since 1952. For both ice caps, the areal reduction accelerated at the beginning of the 21st century. The estimated glacier-wide mass balance was -0.37 ± 0.21 m a-1 water equivalent (w.e.) over Grinnell Ice Cap for the 1952-2014 period, and -0.47 ± 0.16 m a-1 w.e. over Terra Nivea Ice Cap for the 1958/59-2014 period. Terra Nivea Ice Cap has experienced an accelerated rate of mass loss of -1.77 ± 0.36 m a-1 w.e. between 2007 and 2014. This rate is 5.9 times as negative when compared to the 1958/59-2007 period (-0.30 ± 0.19 m a-1 w.e.) and 2 times as negative when compared to the mass balance of other glaciers in the southern parts of Baffin Island over the 2003-2009 period. A similar acceleration in mass loss is suspected for the Grinnell Ice Cap, given the calculated elevation changes and the proximity to Terra Nivea Ice Cap. The recent increase in mass loss rates for these two ice caps is linked to a strong near-surface regional warming and a lengthening of the melt season into the autumn that may be indirectly strengthened by a later freezing of sea ice in the Hudson Strait sector. On a methodological level, our study illustrates the strong potential of Pléiades satellite data to unlock the under-exploited archive of old aerial photographs. © Author(s) 2015.
学科领域	airborne survey; data set; elevation; historical record; ice cap; ice mechanics; in situ measurement; mass balance; Pleiades; satellite imagery; snow water equivalent; spatiotemporal analysis; warming; Baffin Island; Canada; Canadian Arctic; Hudson Strait; Nunavut
语种	英语
scopus关键词	airborne survey; data set; elevation; historical record; ice cap; ice mechanics; in situ measurement; mass balance; Pleiades; satellite imagery; snow water equivalent; spatiotemporal analysis; warming; Baffin Island; Canada; Canadian Arctic; Hudson Strait; Nunavut
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119842
作者单位	Centre d'Applications et de Recherches en Télédétection, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre d'Études Nordiques, Québec City, QC, Canada; Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Centre National de la Recherche Scientifique (LEGOS - CNRS, UMR5566), Université de Toulouse, Toulouse, 31400, France; Department of Earth Sciences, Uppsala University, Uppsala, 75236, Sweden
推荐引用方式 GB/T 7714	Papasodoro C.,Berthier E.,Royer A.,et al. Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014[J],2015,9(4).
APA	Papasodoro C.,Berthier E.,Royer A.,Zdanowicz C.,&Langlois A..(2015).Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014.Cryosphere,9(4).
MLA	Papasodoro C.,et al."Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014".Cryosphere 9.4(2015).