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- W4384155066 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Ice shelves influence the mass balance of the Antarctic Ice Sheet by restricting the flow of ice across the grounding zone. Their ability to restrict ice flow is sensitive to changes in their extent or thickness. Full thickness fractures, known as rifts, create tabular icebergs which reduce ice shelf extent. We present a method for measuring rift width using ICESat-2 laser altimetry, as part of a larger effort to detect, catalog and measure various characteristics of Antarctic rifts. We validate the results using optical satellite imagery and data from Global Navigation Satellite System (GNSS) receivers around Halloween Crack on Brunt Ice Shelf, East Antarctica. During the study period a further rift, North Rift formed and rapidly calved a ~1270 km<sup>2</sup> iceberg. In response to this second rift, the opening of Halloween Crack approached stagnation before returning to opening at a reduced rate. We suggest the opening rate is controlled by the ice shelf geometry and degree of contact with a pinning point at McDonald Ice Rumples, and its influence on the large-scale ice flow field. We replicate the general pattern of opening using an inverse finite element model, and discuss the response of the ice shelf to the calving. We use historical satellite imagery and previously published ice-front positions to demonstrate the importance of McDonald Ice Rumples to the long-term calving and advance cycle of Brunt Ice Shelf." @default.
- W4384155066 created "2023-07-14" @default.
- W4384155066 date "2023-07-13" @default.
- W4384155066 modified "2023-09-29" @default.
- W4384155066 title "Comment on tc-2023-63" @default.
- W4384155066 doi "https://doi.org/10.5194/tc-2023-63-rc1" @default.
- W4384155066 hasPublicationYear "2023" @default.
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