气候变化领域集成服务门户(CCPortal): Frontal ablation and mass loss of the Patagonian icefields

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DOI	10.1016/j.epsl.2021.116811
	Frontal ablation and mass loss of the Patagonian icefields
	Minowa M.; Schaefer M.; Sugiyama S.; Sakakibara D.; Skvarca P.
发表日期	2021
ISSN	0012821X
卷号	561
英文摘要	The complex dynamics of calving glaciers is a major uncertainty in projecting global glacial mass loss. We present frontal ablation and ice mass change for the 38 major calving glaciers in the Patagonian icefields based on remote-sensing observations of ice-front positions, surface speeds and elevation changes. The frontal ablation from 2000 to 2019 was −24.1 ± 1.7 Gt a−1, which represents 34 ± 6% of the total ablation of the icefields. The fraction of frontal ablation was close to half in the southern icefield and about one fifth in the northern icefield. The rate of the mass loss from the icefields during the period of study was 15.2 ± 3.5 Gt a−1, which is generally explained by surface mass balance but was accelerated as a result of increasing frontal ablation. The frontal ablation and mass change values suggest surface mass balance to be −1.5 ± 0.9 Gt a−1 for the northern icefield and +11.5 ± 2.7 Gt a−1 for the southern icefield during this period. Our study demonstrates that a strong increase in frontal ablation at several glaciers drives the mass loss in the southern icefield, whereas increasingly negative surface mass balance drives the mass loss in the northern icefield. © 2021 Elsevier B.V.
关键词	calving glacier frontal ablation ice mass loss Patagonia
英文关键词	Remote sensing; Complex dynamics; Ice-mass changes; Mass change; Mass loss; Surface mass balance; Surface speed; Ablation; ablation; elevation; glacier dynamics; glacier mass balance; glaciology; ice cover; ice field; ice movement; uncertainty analysis; Patagonia
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203223
作者单位	Instituto de Ciencias Físicas y Matemáticas, Universidad Austral de Chile, Campus Isla Teja, Edificio Emilio Pugín, Valdivia, Chile; Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819, Japan; Glaciarium—Centro de Interpretación de Glaciares, RP11, El Calafate, Santa Cruz Z9405, Argentina
推荐引用方式 GB/T 7714	Minowa M.,Schaefer M.,Sugiyama S.,et al. Frontal ablation and mass loss of the Patagonian icefields[J],2021,561.
APA	Minowa M.,Schaefer M.,Sugiyama S.,Sakakibara D.,&Skvarca P..(2021).Frontal ablation and mass loss of the Patagonian icefields.Earth and Planetary Science Letters,561.
MLA	Minowa M.,et al."Frontal ablation and mass loss of the Patagonian icefields".Earth and Planetary Science Letters 561(2021).