干旱区生态环境知识资源中心(Arid): Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach

Arid

DOI	10.1016/j.geog.2015.05.010
	Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach
	Wang, C. Q.; Xu Houze; Zhong Min; Feng Wei
通讯作者	Zhong, M
来源期刊	GEODESY AND GEODYNAMICS
ISSN	1674-9847
出版年	2015
卷号	6 期号:4 页码:253-266
英文摘要	The Gravity Recovery and Climate Experiment (GRACE) mission can significantly improve our knowledge of the temporal variability of the Earth's gravity field. We obtained monthly gravity field solutions based on variational equations approach from GPS-derived positions of GRACE satellites and K-band range-rate measurements. The impact of different fixed data weighting ratios in temporal gravity field recovery while combining the two types of data was investigated for the purpose of deriving the best combined solution. The monthly gravity field solution obtained through above procedures was named as the Institute of Geodesy and Geophysics (IGG) temporal gravity field models. IGG temporal gravity field models were compared with GRACE Release05 (RL05) products in following aspects: (i) the trend of the mass anomaly in China and its nearby regions within 2005-2010; (ii) the root mean squares of the global mass anomaly during 2005-2010; (iii) time-series changes in the mean water storage in the region of the Amazon Basin and the Sahara Desert between 2005 and 2010. The results showed that IGG solutions were almost consistent with GRACE RL05 products in above aspects (i)-(iii). Changes in the annual amplitude of mean water storage in the Amazon Basin were 14.7 +/- 1.2 cm for IGG, 17.1 +/- 1.3 cm for the Centre for Space Research (CSR), 16.4 +/- 0.9 cm for the GeoForschungsZentrum (GFZ) and 16.9 +/- 1.2 cm for the Jet Propulsion Laboratory (JPL) in terms of equivalent water height (EWH), respectively. The root mean squares of the mean mass anomaly in Sahara were 1.2 cm, 0.9 cm, 0.9 cm and 1.2 cm for temporal gravity field models of IGG, CSR, GFZ and JPL, respectively. Comparison suggested that IGG temporal gravity field solutions were at the same accuracy level with the latest temporal gravity field solutions published by CSR, GFZ and JPL. (C) 2015, Institute of Seismology, China Earthquake Administration, etc. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
英文关键词	Gravity recovery and climate experiment (GRACE) Temporal gravity field Variational equations approach Water storage changes Equivalent water height(EWH) Data weight ratio Geoid height per degree IGG temporal gravity model
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000384892600003
WOS关键词	ACCELERATIONS ; VARIABILITY ; SATELLITE ; MODEL
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331278
作者单位	[Wang, C. Q.; Xu Houze; Zhong Min; Feng Wei] Chinese Acad Sci, Inst Geodesy & Geophs, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China; [Wang, C. Q.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, C. Q.,Xu Houze,Zhong Min,et al. Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach[J],2015,6(4):253-266.
APA	Wang, C. Q.,Xu Houze,Zhong Min,&Feng Wei.(2015).Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach.GEODESY AND GEODYNAMICS,6(4),253-266.
MLA	Wang, C. Q.,et al."Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach".GEODESY AND GEODYNAMICS 6.4(2015):253-266.