Greenland ice sheet mass variations based on GRACE satellite gravity data

Feng Guiping; Wang Qimao; Song Qingtao

doi:10.3969/j.issn.0253-4193.2018.11.008

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Feng Guiping, Wang Qimao, Song Qingtao. Greenland ice sheet mass variations based on GRACE satellite gravity data[J]. Haiyang Xuebao, 2018, 40(11): 73-84. doi: 10.3969/j.issn.0253-4193.2018.11.008

Citation:

Feng Guiping, Wang Qimao, Song Qingtao. Greenland ice sheet mass variations based on GRACE satellite gravity data[J]. Haiyang Xuebao, 2018, 40(11): 73-84. doi: 10.3969/j.issn.0253-4193.2018.11.008

Feng Guiping, Wang Qimao, Song Qingtao. Greenland ice sheet mass variations based on GRACE satellite gravity data[J]. Haiyang Xuebao, 2018, 40(11): 73-84. doi: 10.3969/j.issn.0253-4193.2018.11.008

Citation:

Feng Guiping, Wang Qimao, Song Qingtao. Greenland ice sheet mass variations based on GRACE satellite gravity data[J]. Haiyang Xuebao, 2018, 40(11): 73-84. doi: 10.3969/j.issn.0253-4193.2018.11.008

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Greenland ice sheet mass variations based on GRACE satellite gravity data

doi: 10.3969/j.issn.0253-4193.2018.11.008

1.
National Satellite Ocean Application Service, Beijing 100081, China;Key Laboratory of Ocean Space Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China;Center for Earth System Science, Tsinghua University, Beijing 100084, China;College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
2.
National Satellite Ocean Application Service, Beijing 100081, China;Key Laboratory of Ocean Space Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China

Received Date: 2018-06-15
Rev Recd Date: 2018-07-16

Abstract

Abstract

The Gravity Recovery and Climate Experiment (GRACE) mission launched in 2002 provided a new opportunity to estimate the global mass variations with high temporal-spatial resolution. We use the GRACE RL05 data from January 2003 to December 2014 to estimate the Greenland ice mass variations. We applied 500 km Gaussian smoothing, a decorrelation filtering and a forward modelling to reduce the land-ocean leakage effects to obtain the time series of Greenland's ice sheet mass, analyzes the long-term trend of Greenland ice sheet, and compared with the ICESat results. Results show that the mass change rate of the Greenland ice sheet from January 2003 to December 2014 is (-260±43) Gt/a, equivalent to (0.72±0.12) mm/a of the global sea level change, which occupied the 25.8% contribution to sea level rise. And the Greenland ice sheet melting has a very strong regional differences, mainly concentrated in the edge of the area, while for the central region, the central inland ice sheet has a tendency to increase. And we further compared with the ICESat result to verify our results. The result of the ICESat show hat the mass change rate of the Greenland ice sheet is from (-174±43) Gt/a to (-184.8±28.2) Gt/a, and the result of GRACE is about (-209.4±26.3) Gt/a, and have a good consistency, and the characteristics of regional distribution have also a good agreement.
- GRACE,
- ICESat,
- Greenland ice sheet,
- mass changes

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References(36)

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