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DOI | 10.1007/s12040-019-1209-3 |
Volume loss of the Greenland ice sheet revealed by SARAL/AltiKa repeat passes radar altimetry | |
Suryawanshi, Maya Raghunath1,2; Chander, Shard1; Oza, Sandip R.1; Bahuguna, I. M.1 | |
发表日期 | 2019 |
ISSN | 2347-4327 |
EISSN | 0973-774X |
卷号 | 128期号:7 |
英文摘要 | The Greenland ice sheet (GrIS) is one of the drivers of global sea level rise and plays a crucial role in understanding the global climate changes. Here, we have estimated and analysed the decadal (between 2013-2016 and 2003-2005) and annual (2014-2015, 2015-2016) volume discharge of ice from the entire GrIS. The 40Hz Geophysical Data Record product of the unique Ka band (AltiKa) radar altimeter were utilised to derive the elevation, elevation changes and volume changes over the GrIS. To test the first-level accuracy of the result, AltiKa and NASA's ice, cloud and land elevation satellite digital elevation model (ICESat DEM)-derived elevation were compared, which yielded a correlation value of 0.95. Thereafter, decadal volume changes obtained over the entire GrIS, from the differencing of the AltiKa and ICESat DEM elevation revealed a decreasing rate of 247km(3)/year. Moreover, basin-wise analysis indicated the maximum decrease in elevation of basin located in the north and north-west region of GrIS. Annual changes obtained by differencing the AltiKa cycle of the same month (so that the surface condition will remain same) between the two consecutive years, specifically during 2014-2015 and 2015-2016 over the entire GrIS contributed volume loss of 187 and 210km(3), respectively, indicating an enhanced decrease for a later period. |
WOS研究方向 | Geology ; Science & Technology - Other Topics |
来源期刊 | JOURNAL OF EARTH SYSTEM SCIENCE |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/103171 |
作者单位 | 1.Space Applicat Ctr ISRO, Ahmadabad, Gujarat, India; 2.Gujarat Univ, Dept Phys Elect & Space Sci, Ahmadabad, Gujarat, India |
推荐引用方式 GB/T 7714 | Suryawanshi, Maya Raghunath,Chander, Shard,Oza, Sandip R.,et al. Volume loss of the Greenland ice sheet revealed by SARAL/AltiKa repeat passes radar altimetry[J],2019,128(7). |
APA | Suryawanshi, Maya Raghunath,Chander, Shard,Oza, Sandip R.,&Bahuguna, I. M..(2019).Volume loss of the Greenland ice sheet revealed by SARAL/AltiKa repeat passes radar altimetry.JOURNAL OF EARTH SYSTEM SCIENCE,128(7). |
MLA | Suryawanshi, Maya Raghunath,et al."Volume loss of the Greenland ice sheet revealed by SARAL/AltiKa repeat passes radar altimetry".JOURNAL OF EARTH SYSTEM SCIENCE 128.7(2019). |
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