Abstract
Abstract. Recent research indicates that the estimated elevation changes and associated mass balance in East Antarctica are of some degree of uncertainty; a light accumulation has occurred in its vast inland regions, while mass loss in Wilkes Land appears significant. It is necessary to study the mass change trend in the context of a long period of the East Antarctic Ice Sheet (EAIS). The input-output method based on surface ice flow velocity and ice thickness is one of the most important ways to estimate the mass balance, which can provide longer-term knowledge of mass balance because of the availability of the early satellites in 1960s. In this study, we briefly describe the method of extracting ice velocity based on the historical optical images from 1960s to 1980s. Based on the draft ice velocity map of the EAIS using this method, we conduct a series of validation experiments, including comparisons with in-situ measurement, existing historical maps and rock outcrop dataset. Finally, we use the input-output method to estimate mass balance in some regions of EAIS using the generated velocity map.
Highlights
Ice flow velocity on the Antarctic Ice Sheet (AIS) is a significant indicator of its stability and change status under the global climate change conditions (Rignot et al, 2019; The IMBIE Team, 2018)
The latest research demonstrates that the East Antarctic Ice Sheet (EAIS) has been in a slightly positive mass balance state (The IMBIE Team, 2018; Rignot et al, 2019), but there exist coastal regions such as Totten Glacier with observed thinning and mass loss accelerating (McMillan et al, 2014; Paolo et al, 2015; Pritchard et al, 2009)
The results show that the ice velocity on Reeves Glacier and Priestley Glacier is in good agreement with that extracted by Frezzotti et al (1998)
Summary
Ice flow velocity on the Antarctic Ice Sheet (AIS) is a significant indicator of its stability and change status under the global climate change conditions (Rignot et al, 2019; The IMBIE Team, 2018). The latest research demonstrates that the East Antarctic Ice Sheet (EAIS) has been in a slightly positive mass balance state (The IMBIE Team, 2018; Rignot et al, 2019), but there exist coastal regions such as Totten Glacier with observed thinning and mass loss accelerating (McMillan et al, 2014; Paolo et al, 2015; Pritchard et al, 2009). Potential drivers of these phenomenon remain less clear (Alley et al, 2005; Shen et al, 2018).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
