Imminent calving accelerated by increased instability of the Brunt Ice Shelf, in response to climate warming

Cheng, Yuhua; Xia, Menglian; Qiao, Gang; Lv, Die; Li, Yanjun; Hai, Gang

doi:10.1016/j.epsl.2021.117132

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…However, the average length of the fractures shows an opposite pattern, being shorter in the RIS with a length of ∼6.19 km and longer in the FIS with a length of ∼11.76 km. In the propagation process, the length of some of the fractures can reach tens or even hundreds of kilometers, eventually forming an iceberg's detachment boundary (Cheng, Xia, Qiao, Li, et al., 2021; Cheng, Xia, Qiao, Lv, et al., 2021; Fricker, 2005; Walker & Gardner, 2019). As Figure 9a indicates, the longest fractures throughout the ice shelf appear in band 4 of the RIS and bands 11 and 12 of the FIS, both near the front of the ice shelf.…”

Section: Scientific Application In the Frismentioning

confidence: 99%

“…This comes at the cost of efficiency, leading to hysteresis in monitoring the instability of large ice shelves. Given the current increasing instability of parts of the Antarctic ice shelves, such as the Pine Island, Thwaites, and Ninnis glaciers in West Antarctica (Cheng, Xia, Qiao, Li, et al., 2021; Cheng, Xia, Qiao, Lv, et al., 2021; Favier et al., 2014; Lhermitte et al., 2020), the Totten Glacier and Brunt Ice Shelf in East Antarctica (Cheng, Xia, Qiao, Li, et al., 2021; Cheng, Xia, Qiao, Lv, et al., 2021; X. Li et al., 2015; Rintoul Stephen et al., 2016) and the Larsen Ice Shelf in the Antarctic Peninsula (Khazendar et al., 2015; McGrath et al., 2012), we propose an automatic extraction framework to extract fractures with open source code and libraries. This framework can filter out most non‐fractures under the constraints of the glaciological property set by existing external data sets without any manual intervention.…”

Section: Introductionmentioning

confidence: 99%

“…(2021) and Cheng, Xia, Qiao, Lv, et al. (2021) extracted and analyzed a critical chasm in Brunt Ice Shelf from Landsat images and predicted its imminent calving. R. Li et al.…”

Section: Introductionmentioning

confidence: 99%

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A Framework for Fracture Extraction Under Glaciological Property‐Based Constraints: Scientific Application on the Filchner–Ronne Ice Shelf of Antarctica

Cheng

Xiao

et al. 2022

Earth and Space Science

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Antarctica's ice shelves play an important role in the ice sheet mass balance and associated global sea level changes (Fürst et al., 2016;R. Li et al., 2021). The calving and collapse of these ice shelves will accelerate Antarctic ice flow and mass loss, which will increase the rate of sea level rise (Alley et al., 2016;Levermann et al., 2012). Fractures are structural features influencing the ice shelf stability, which include surface crevasses, basal crevasses, and rifts. A surface crevasse is a type of crack that opens when surface stresses and strain rates meet or exceed one of several criteria for failure, including von Mises criterion, Coulomb criterion, Griffith's criterion, and the maximum strain-energy dissipation criterion (Vaughan, 1993). Particularly large surface crevasses are often the surface expression of basal crevasses, caused when hydrostatic equilibrium in the crevassed ice column generates a surface depression (Luckman et al., 2012) by modifying buoyancy and gravity. Bending stresses from the modified shape will drive surface crevassing (McGrath et al., 2012). Both surface and basal crevasses can propagate

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Section: Scientific Application In the Frismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Framework for Fracture Extraction Under Glaciological Property‐Based Constraints: Scientific Application on the Filchner–Ronne Ice Shelf of Antarctica

Cheng

Xiao

et al. 2022

Earth and Space Science

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Calving cycle of Ninnis Glacier over the last 60 years

Cheng¹,

Xia²,

Qiao³

et al. 2021

International Journal of Applied Earth Observation and Geoinfor

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Mass Balance of the Antarctic Ice Sheet in the Early 21st Century

et al. 2023

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Mass loss from the Antarctic Ice Sheet (AIS) is an important contributor to global sea level rise. To examine the recent ice loss, we estimated the mass budget of the AIS from 2000 to 2020 using multiple ice velocity datasets, state-of-the-art ice thickness datasets, and extended surface mass balance (SMB) records. The AIS lost mass at an average rate of −89 ± 99 Gt/yr over the study period. The East Antarctic Ice Sheet (EAIS) showed a slightly positive mass balance, while the West Antarctic Ice Sheet (WAIS) experienced a significant acceleration in mass loss. The ice discharge from the AIS increased from 1792 ± 47 Gt/yr in 2000 to 1940 ± 37 Gt/yr in 2017–2020, with the increase in the discharge from the WAIS being three to four times higher than that from the EAIS. Moreover, the average mass balance for 2017–2020 was −99 ± 93 Gt/yr, slightly more negative than the average for the early 21st Century. During this recent period, the ice discharge decreased in the East Indian Ocean sector, in contrast to its rapid increase from 2000 to 2013–2017. However, the discharge in the Amundsen Sea sector still greatly increased from 2013–2017 to 2017–2020. Overall, our results are in agreement with recent mass balance estimates for the AIS based on gravimetry and altimetry. Our assessments of the recent AIS mass balance with the mass budget method (input-output method) will contribute to the understanding of ice dynamic processes and provide insights into the stability of the AIS.

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Imminent calving accelerated by increased instability of the Brunt Ice Shelf, in response to climate warming

Cited by 3 publications

References 36 publications

A Framework for Fracture Extraction Under Glaciological Property‐Based Constraints: Scientific Application on the Filchner–Ronne Ice Shelf of Antarctica

A Framework for Fracture Extraction Under Glaciological Property‐Based Constraints: Scientific Application on the Filchner–Ronne Ice Shelf of Antarctica

Calving cycle of Ninnis Glacier over the last 60 years

Mass Balance of the Antarctic Ice Sheet in the Early 21st Century

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