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Disintegration and acceleration of Thwaites Ice Shelf on the Amundsen Sea revealed from remote sensing measurements

Cited 2 time in scopus
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Title
Disintegration and acceleration of Thwaites Ice Shelf on the Amundsen Sea revealed from remote sensing measurements
Other Titles
위성관측에 의한 아문젠해 쓰웨이트 빙붕의 감소에 관한 연구
Authors
Jin-Woo Kim
Lee, Sang H.
Ho Kyung Ha
Seung Hee Kim
Duk-jin Kim
Keywords
Landsat; Thwaites Ice Shelf; airborne SAR; disintegration; hidden crevasses
Issue Date
2015
Citation
Jin-Woo Kim, et al. 2015. "Disintegration and acceleration of Thwaites Ice Shelf on the Amundsen Sea revealed from remote sensing measurements". GISCIENCE & REMOTE SENSING, 52(4): 498-509.
Abstract
Thwaites Ice Shelf in the Amundsen Sea is one of the biggest ice shelves in West Antarctica and is well known for significant mass changes. In the shear zone between Thwaites Glacier Tongue and its eastern ice shelf, shear stress forced by different flow rates of the ice shelves is causing the ice to break apart. A time series analysis of remote sensing data obtained by Landsat 7 Enhanced Thematic Mapper Plus (ETM+), TerraSAR-X, and airborne synthetic aperture radar (SAR) revealed that the shear zone has extended since 2006 and eventually disintegrated in 2008. We quantified the acceleration of Thwaites Ice Shelf with time by using the feature tracking method. The buttressing loss induced by the extension of the shear zone and progressive disintegration accelerated the flow of Thwaites Glacier Tongue, which in turn increased the shear stress on its eastern ice shelf. We determine causes of disintegration in the newly formed shear zone to be oceanic basal melting and structural weakening induced by Circumpolar Deep Water intrusion beneath the eastern ice shelf since 2000. The structural weakening was examined by using the density distribution of rifts and crevasses on the ice shelf, which were well identified from high-resolution SAR and optical satellite images.
URI
http://repository.kopri.re.kr/handle/201206/7349
DOI
http://dx.doi.org/10.1080/15481603.2015.1041766
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