气候变化领域集成服务门户(CCPortal): Replacing GRACE/GRACE-FO C30 With Satellite Laser Ranging: Impacts on Antarctic Ice Sheet Mass Change

CCPortal

DOI	10.1029/2019GL085488
	Replacing GRACE/GRACE-FO C30 With Satellite Laser Ranging: Impacts on Antarctic Ice Sheet Mass Change
	Loomis B.D.; Rachlin K.E.; Wiese D.N.; Landerer F.W.; Luthcke S.B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Satellite laser ranging (SLR) observations have long been relied upon for measuring changes in Earth's dynamic oblateness, (Formula presented.). This major component of Earth's time-variable gravity field is not well observed by the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) missions, leading to the common practice of replacing their values with those obtained by SLR. The (Formula presented.) coefficient, which has a large impact on the recovered Antarctic Ice Sheet mass changes, is shown here to be poorly observed by GRACE/GRACE-FO when either mission is operating without two fully functional accelerometers. The GRACE spacecraft pair operated nominally until October 2016 when one accelerometer was powered off due to battery limitations, while GRACE-FO is currently excluding one accelerometer from the data processing due to elevated noise levels. Beginning with the launch of Laser Relativity Satellite in 2012, SLR-derived (Formula presented.) values are suitable for replacing any problematic GRACE/GRACE-FO estimates, enabling the accurate recovery of Antarctic Ice Sheet mass changes, among others. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Accelerometers; Data handling; Earth (planet); Glaciers; Ice; Recovery; Tracking (position); Antarctic ice sheets; GRACE-FO; Gravity recovery and climate experiments; Mass change; Noise levels; Oblateness; Satellite laser ranging; Time-variable gravity; Geodetic satellites
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170728
作者单位	Geodesy and Geophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; KBRwyle, Greenbelt, MD, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Loomis B.D.,Rachlin K.E.,Wiese D.N.,et al. Replacing GRACE/GRACE-FO C30 With Satellite Laser Ranging: Impacts on Antarctic Ice Sheet Mass Change[J],2020,47(3).
APA	Loomis B.D.,Rachlin K.E.,Wiese D.N.,Landerer F.W.,&Luthcke S.B..(2020).Replacing GRACE/GRACE-FO C30 With Satellite Laser Ranging: Impacts on Antarctic Ice Sheet Mass Change.Geophysical Research Letters,47(3).
MLA	Loomis B.D.,et al."Replacing GRACE/GRACE-FO C30 With Satellite Laser Ranging: Impacts on Antarctic Ice Sheet Mass Change".Geophysical Research Letters 47.3(2020).