Surface meltwater drainage and ponding on Amery Ice Shelf, East Antarctica, 1973–2019
Surface meltwater drainage and ponding on Amery Ice Shelf, East Antarctica, 1973–2019
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1973 年至 2019 年东南极洲埃默里冰架表面融水排水和积水
DOI:
10.1017/jog.2021.46
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发表时间:
2021
影响因子:
3.4
通讯作者:
Fricker, Helen A.
中科院分区:
文献类型:
--
作者:
Spergel, Julian J.;Kingslake, Jonathan;Creyts, Timothy;van Wessem, Melchior;Fricker, Helen A.
Surface melting on Amery Ice Shelf (AIS), East Antarctica, produces an extensive supraglacial drainage system consisting of hundreds of lakes connected by surface channels. This drainage system forms most summers on the southern portion of AIS, transporting meltwater large distances northward, toward the ice front and terminating in lakes. Here we use satellite imagery, Landsat (1, 4 and 8), MODIS multispectral and Sentinel-1 synthetic aperture radar to examine the seasonal and interannual evolution of the drainage system over nearly five decades (1972–2019). We estimate seasonal meltwater input to one lake by integrating output from the regional climate model [Regional Atmospheric Climate Model (RACMO 2.3p2)] over its catchment defined using the Reference Elevation Model of Antarctica. We find only weak positive relationships between modeled seasonal meltwater input and lake area and between meltwater input and lake volume. Consecutive years of extensive melting lead to year-on-year expansion of the drainage system, potentially through a link between melt production, refreezing in firn and the maximum extent of the lakes at the downstream termini of drainage. These mechanisms are important when evaluating the potential of drainage systems to grow in response to increased melting, delivering meltwater to areas of ice shelves vulnerable to hydrofracture.
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影响因子:
56.9
作者:
M. Fahnestock;R. Bindschadler;R. Kwok;K. Jezek
通讯作者:
M. Fahnestock;R. Bindschadler;R. Kwok;K. Jezek
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Depoorter;J. Bamber;J. Griggs;J. Lenaerts;S. Ligtenberg;M. Broeke;G. Moholdt
通讯作者:
G. Moholdt
影响因子:
5.2
作者:
L. Montgomery;C. Miège;Julie Z. Miller;T. Scambos;B. Wallin;O. Miller;D. Solomon;R. Forster;L. Koenig
通讯作者:
L. Koenig
影响因子:
13.6
作者:
Dow CF;Lee WS;Greenbaum JS;Greene CA;Blankenship DD;Poinar K;Forrest AL;Young DA;Zappa CJ
通讯作者:
Zappa CJ
影响因子:
13.5
作者:
Gorelick, Noel;Hancher, Matt;Moore, Rebecca
通讯作者:
Moore, Rebecca