Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B8, 549-553, 2016
https://doi.org/10.5194/isprs-archives-XLI-B8-549-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
23 Jun 2016
ANTARCTIC ICE SHEET SURFACE MASS BALANCE ESTIMATES FROM 2003 TO 2015 USING ICESAT AND CRYOSAT-2 DATA
Huan Xie1,2, Gang Hai1,2, Lei Chen1,2, Shijie Liu1,2, Jun Liu1,2, Xiaohua Tong1,2, and Rongxing Li1,2 1College of Surveying and Geo-Informatics, Tongji University, 1239 Siping Road, Shanghai, China
2Center for Spatial Information Science and Sustainable Development, Tongji University, 1239 Siping Road, Shanghai, China
Keywords: Antarctica, Mass Balance, ICESat, CryoSat-2 Abstract. An assessment of Antarctic ice sheet surface mass balance from 2003 to 2015 has been carried out using a combination of ICESat data from 2003 to 2009 and CryoSat-2 data from 2010 to 2015. Both data sets are of L2 and are currently processed separately using different models. First, a repeat-track processing method that includes terms accounting for the trend and the first order fit of topography is applied to repeat-track measurements of all ICESat Campaigns. It uses the Least Squares fitting of the model to all observations in a box of 500 m x 500 m. The estimated trends in these boxes are then averaged inside a 30 km x 30 km cell. Similarly, the cells are used to estimate basin and ice sheet level surface elevation change trends. Mass balance calculating is performed at the cell level by multiplying the ice density by the volume change and then extended to the basin and the ice sheet level. Second, in CryoSat-2 data processing we applied a model within a cell of 5 km x 5 km considering that CryoSat-2 does not maintain repeated tracks. In this model the elevation trend, and a higher order topography are solved in an iterative way using the least squares technique. The mass change is computed at the cell level in the same way as the ICESat data. GIA correction is applied for both ICESat and CryoSat-2 estimates. Detailed information about the data processing, elevation and mass balance changes, and comparison with other studies will be introduced.
Conference paper (PDF, 1058 KB)


Citation: Xie, H., Hai, G., Chen, L., Liu, S., Liu, J., Tong, X., and Li, R.: ANTARCTIC ICE SHEET SURFACE MASS BALANCE ESTIMATES FROM 2003 TO 2015 USING ICESAT AND CRYOSAT-2 DATA, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B8, 549-553, https://doi.org/10.5194/isprs-archives-XLI-B8-549-2016, 2016.

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