Long-Term Monitoring and Change Analysis of Pine Island Ice Shelf Based on Multi-Source Satellite Observations during 1973-2020

被引：5

作者：

Liu, Shijie ^{[1
,2
]}

Su, Shu ^{[1
]}

Cheng, Yuan ^{[1
,2
]}

Tong, Xiaohua ^{[1
,2
]}

Li, Rongxing ^{[1
,2
]}

机构：

[1] Tongji Univ, Coll Surveying & Geoinformat, Siping Rd 1239, Shanghai, Peoples R China

[2] Tongji Univ, Ctr Spatial Informat Sci & Sustainable Dev, Siping Rd 1239, Shanghai, Peoples R China

来源：

JOURNAL OF MARINE SCIENCE AND ENGINEERING | 2022年 / 10卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Pine Island Glacier Ice Shelf; ice flow velocity; ocean water temperature; ice shelf disintegration; multi-source remote sensing; AMUNDSEN SEA EMBAYMENT; RIFT PROPAGATION; WEST ANTARCTICA; MELT RATES; GLACIER; RETREAT; OCEAN; THWAITES; SHEET; VARIABILITY;

D O I：

10.3390/jmse10070976

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Pine Island Glacier (PIG) is one of the largest contributors to sea level rise in Antarctica. Continuous thinning and frequent calving imply significant destabilization of Pine Island Glacier Ice Shelf (PIGIS). To understand the mechanism of its accelerated disintegration and its future development, we conducted a long-term monitoring and comprehensive analysis of PIGIS, including ice flow velocity, ice shelf fronts, ocean water temperature, rifts, and surface strain rates, based on multi-source satellite observations during 1973-2020. The results reveal that: (1) ice flow velocities of PIGIS increased from 2.3 km/yr in 1973 to 4.5 km/yr in 2020, with two rapid acceleration periods of 1995-2009 and 2017-2020, and its change was highly correlated to the ocean water temperature variation. (2) At least 13 calving events occurred during 1973-2020, with four unprecedented successive retreats in 2015, 2017, 2018, and 2020. (3) The acceleration of ice shelf rifting and calving may correlate to the destruction of shear margins, while this damage was likely a response to the warming of bottom seawater. The weakening southern shear margin may continue to recede, indicating that the instability of PIGIS will continue.

引用

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