Satellite and ground based estimates for ice surface velocities in the part of central Dronning Maud Land, East Antarctica: Implications for ice flux calculations

Thakur, Praveen K.; Swain, Ashit K.; Dhote, Pankaj R.; Kumar, P. K. Vinod; Kaushik, Suvrat; Gajbhiye, Deepak; Mahagaonkar, Anirudha; Sharma, Vishal; Dharwadkar, Amit; Beg, Javed; Chauhan, Prakash; Kumar, Anil

doi:10.1016/j.polar.2021.100737

Cited by 4 publications

(2 citation statements)

References 68 publications

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“…According to the locations of the ice gates determined above, the total SMB of the upstream region of G1, the region between G1 and G2, the region between G2 and G3, and the whole glacier in Lambert Glacier were calculated, respectively. The total SMB was equal to the corresponding annual average accumulation rate multiplied by the region's area, and the error was 20% of the SMB [42,43]. Finally, the subtraction with the output ice flux was used to estimate the net accumulation of the corresponding area within the Lambert Glacier.…”

Section: Surface Mass Balance Processingmentioning

confidence: 99%

Revisiting Ice Flux and Mass Balance of the Lambert Glacier–Amery Ice Shelf System Using Multi-Remote-Sensing Datasets, East Antarctica

Tang

Yang

et al. 2022

Remote Sensing

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Due to rapid global warming, the relationship between the mass loss of the Antarctic ice sheet and rising sea levels are attracting widespread attention. The Lambert–Amery glacial system is the largest drainage system in East Antarctica, and its mass balance has an important influence on the stability of the Antarctic ice sheet. In this paper, the recent ice flux in the Lambert Glacier of the Lambert–Amery system was systematically analyzed based on recently updated remote sensing data. According to Landsat-8 ice velocity data from 2018 to April 2019 and the updated Bedmachine v2 ice thickness dataset in 2021, the contribution of ice flux approximately 140 km downstream from Dome A in the Lambert Glacier area to downstream from the glacier is 8.5 ± 1.9, and the ice flux in the middle of the convergence region is 18.9 ± 2.9. The ice mass input into the Amery ice shelf through the grounding line of the whole glacier is 19.9 ± 1.3. The ice flux output from the mainstream area of the grounding line is 19.3 ± 1.0. Using the annual SMB data of the regional atmospheric climate model (RACMO v2.3) as the quality input, the mass balance of the upper, middle, and lower reaches of the Lambert Glacier was analyzed. The results show that recent positive accumulation appears in the middle region of the glacier (about 74–78°S, 67–85°E) and the net accumulation of the whole glacier is 2.4 ± 3.5. Although the mass balance of the Lambert Glacier continues to show a positive accumulation, and the positive value in the region is decreasing compared with values obtained in early 2000.

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Section: Surface Mass Balance Processingmentioning

confidence: 99%

Revisiting Ice Flux and Mass Balance of the Lambert Glacier–Amery Ice Shelf System Using Multi-Remote-Sensing Datasets, East Antarctica

Tang

Yang

et al. 2022

Remote Sensing

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“…However, due to its relatively low spatial resolution (approximately 300 km) and susceptibility to glacier dynamic adjustments, GRACE/GRACE-FO cannot provide accurate and high-precision estimations of ice sheet mass changes. The altimetry method, another important monitoring approach, utilizes radar or laser altimeters mounted on satellites to measure changes in the surface elevation of ice sheets and convert them into mass changes [9][10][11][12]. Data from satellites such as ERS (European Remote Sensing) and Envisat of the European Space Agency, as well as ICESat (The Ice, Clouds, and Land Elevation Satellite), have provided valuable observations for researchers [13].…”

Section: Introductionmentioning

confidence: 99%

Estimating the Mass Balance of the Antarctic Ice Sheet from 1985 to 2021 using the Input-Output Method

Yang,

Sun

2024

ACETR

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Accurate monitoring of the Antarctic ice sheet's mass balance is crucial for comprehending its contribution to global sea level rise and climate patterns. We estimate the Antarctic mass balance from 1985 to 2021 using an input-output method. Ice discharge is estimated using an automated algorithm, while surface mass balance data is obtained from the RACMO2.3p2 model. We find a recent decrease in the rate of ice mass loss in Antarctica, consistent with the recent studies. The West Antarctic Ice Sheet (WAIS) drives the increase in ice discharge and mass loss, influenced by rising ocean temperatures and extreme weather events. The East Antarctic Ice Sheet (EAIS) shows stability in mass balance, except for an increase in discharge and mass loss in the Cp-D sub-region. The Antarctic Peninsula experiences increased ice discharge and mass loss, while the islands maintain a positive mass balance. The findings contribute to our understanding of the ongoing changes in ice mass and highlight the sensitivity of different regions to external factors.

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Mapping Samudra Tapu glacier: A holistic approach utilizing radar and optical remote sensing data for glacier radar facies mapping and velocity estimation

Sood

Thakur²,

Stein³

et al. 2022

Advances in Space Research

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Satellite and ground based estimates for ice surface velocities in the part of central Dronning Maud Land, East Antarctica: Implications for ice flux calculations

Cited by 4 publications

References 68 publications

Revisiting Ice Flux and Mass Balance of the Lambert Glacier–Amery Ice Shelf System Using Multi-Remote-Sensing Datasets, East Antarctica

Revisiting Ice Flux and Mass Balance of the Lambert Glacier–Amery Ice Shelf System Using Multi-Remote-Sensing Datasets, East Antarctica

Estimating the Mass Balance of the Antarctic Ice Sheet from 1985 to 2021 using the Input-Output Method

Mapping Samudra Tapu glacier: A holistic approach utilizing radar and optical remote sensing data for glacier radar facies mapping and velocity estimation

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