High resolution Greenland ice sheet inter-annual mass variations combining GRACE gravimetry and Envisat altimetry
High resolution Greenland ice sheet inter-annual mass variations combining GRACE gravimetry and Envisat altimetry
复制标题
结合 GRACE 重力测量和 Envisat 高度测量的高分辨率格陵兰冰盖年际质量变化
DOI:
10.1016/j.epsl.2015.04.016
复制
发表时间:
2015-07
影响因子:
5.3
通讯作者:
Yi Yuchan
中科院分区:
文献类型:
--
作者:
Su Xiaoli;Shum C. K.;Guo Junyi;Duan Jianbin;Howat Ian;Yi Yuchan
Inter-annual mass variations of the Greenland ice sheet (GrIS) are important for improving mass balance estimates, validation of atmospheric circulation models and their potential improvement. By combining observed inter-annual variations from Gravity Recovery and Climate Experiment (GRACE) and Environmental Satellite (Envisat) altimetry data over the period from January 2003 to December 2009, we are able to estimate the nominal density, with the objective of obtaining higher resolution mass changes using altimeter data at the inter-annual scale. We find high correlations between these two inter-annual variations on the order of 0.7 over 60% of the GrIS, in particular over the west side along the central ice divide. Significant negative correlations are found in parts of Northeast and Southeast GrIS, where negative inter-annual variation correlations were also found between mass change from GRACE and snow depth from ECMWF reanalysis in a previous study. In the regions of positive correlation, the estimated nominal densities range from 383.7±50.9 to 596.2±34.1 kg m− 3. We demonstrate the feasibility of obtaining high-resolution inter-annual mass variation over Southwest GrIS, one of the regions with positive correlations, based on density-corrected Envisat altimetry, 2003–2009. A definitive explanation for the existence of regions of negative correlation remains elusive.
登录
查看更多内容
影响因子:
3.4
作者:
H. Zwally;Jun Li;A. Brenner;M. Beckley;H. Cornejo;J. Dimarzio;M. Giovinetto;T. Neumann;J. Rob
通讯作者:
H. Zwally;Jun Li;A. Brenner;M. Beckley;H. Cornejo;J. Dimarzio;M. Giovinetto;T. Neumann;J. Rob
影响因子:
3.9
作者:
Inga Bergmann;G. Ramillien;F. Frappart
通讯作者:
Inga Bergmann;G. Ramillien;F. Frappart
影响因子:
5.2
作者:
I. Velicogna
通讯作者:
I. Velicogna
影响因子:
5.2
作者:
Enderlin, Ellyn M.;Howat, Ian M.;van den Broeke, Michiel R.
通讯作者:
van den Broeke, Michiel R.
影响因子:
5.2
作者:
R. Thomas;E. Frederick;W. Krabill;S. Manizade;C. Martin
通讯作者:
R. Thomas;E. Frederick;W. Krabill;S. Manizade;C. Martin