大地测量与地球动力学2011，Vol.31Issue(3)：42-46,5.
基于GRACE时变重力场反演南极冰盖质量变化
INVESTIGATION ON MASS CHANGE OF ICE SHEET IN ANTARCTIC FROM GRACE TIME-VARIABLE GRAVITY DATA
摘要
Abstract
The rates of Antarctic ice mass change have been estimated by use of the gravity solutions from GRACE level-2 RL04 for the period of January 2003 to August 2008 released by UTCSR. Because C20 of GRACE is not accurate enough, C20 from Satellite Laser Ranging (SLR) is adopted instead. The decorrelation filter technique is used for the stripe shape signal presenting in the longitude direction. Antarctic ice mass change rates are investigated again when the gravity in some one month has been chosen to get rid of, and the results are that the rates of Antarctic ice mass do not change a lot in the same area. Gravity model, filtering technique and ICE-5G postglacial rebound model are combined to observe the ice loss in the west Amundsen Sea Embayment and the northern Antarctic Peninsula, the rates are -5.28 ±0.95 cm/a and -1.82 ±0.77cm/a respectively. Whereas ice mass rates in Southern Ronne Ice Shelf and Enderby land in east Antarctic are positive, and the rates are 1.42 ± 0.69 cm/a and 1.43 ± 0.72 cm/a respectively. Compared with the existing research results, the mass in the west Amundsen Sea Embayment is melting fast, whereas the mass rates in Southern Ronne Ice Shelf and Enderby land in east Antarctic change a little.关键词
GRACE/南极/重力场/相关误差滤波/质量变化率Key words
GRACE/ Antarctica/ gravity field/ correlated error filter/ mass rate分类
天文与地球科学引用本文复制引用
李军海,刘焕玲,文汉江,朱广彬,方爱平..基于GRACE时变重力场反演南极冰盖质量变化[J].大地测量与地球动力学,2011,31(3):42-46,5.基金项目
国家863计划重点项目(2009AA121402) （2009AA121402）
国家自然科学基金(40874012) （40874012）
