气候变化领域集成服务门户(CCPortal): Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco

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DOI	10.1016/j.rse.2018.11.004
	Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco
	Jiang, Liguang; Andersen, Ole Baltazar; Nielsen, Karina; Zhang, Guoqing; Bauer-Gottwein, Peter
通讯作者	Jiang, LG (通讯作者)
发表日期	2019
ISSN	0034-4257
EISSN	1879-0704
起始页码	65
结束页码	79
卷号	221
英文摘要	Water surface elevation (WSE) is an essential quantity for water resource monitoring and hydrodynamic modeling. Satellite altimetry has provided data for inland water bodies. The height that is derived from altimetry measurement is ellipsoidal height. In order to convert the ellipsoidal height to orthometric height, which has physical meaning, accurate estimates of the geoid are needed. This paper evaluates the suitability of geodetic altimetric measurements for improvement of global geoid models over a large lake in the Tibetan Plateau. CryoSat-2 and SARAL/AltiKa are used to derive the high-frequency geoid correction. A validation of the local geoid correction is performed with data from in-situ observations, a laser altimetry satellite (ICESat), a Ka-band radar altimetry satellite (SARAL) and a SAR radar altimetry satellite (Sentinel-3). Results indicate that the geodetic altimetric dataset can capture the high-resolution geoid information. By applying local geoid correction, the precision of ICESat, SARAL and Sentinel-3 retrievals are significantly improved. We conclude that using geodetic altimetry to correct for local geoid residual over large lakes significantly decreases the uncertainty of WSE estimates. These results also indicate the potential of geodetic altimetry missions to determine local geoid residual with centimeter-level accuracy, which can be used to improve global and regional geopotential models.
关键词	TIBETAN PLATEAU SATELLITE RADAR SARIN MODE LEVEL RIVER ICE ATMOSPHERE ACCURACY CRYOSAT
英文关键词	Satellite altimetry; CryoSat-2; Water level; Local geoid; Lake Namco
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000456640700006
来源期刊	REMOTE SENSING OF ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259426
推荐引用方式 GB/T 7714	Jiang, Liguang,Andersen, Ole Baltazar,Nielsen, Karina,et al. Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco[J]. 中国科学院青藏高原研究所,2019,221.
APA	Jiang, Liguang,Andersen, Ole Baltazar,Nielsen, Karina,Zhang, Guoqing,&Bauer-Gottwein, Peter.(2019).Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco.REMOTE SENSING OF ENVIRONMENT,221.
MLA	Jiang, Liguang,et al."Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco".REMOTE SENSING OF ENVIRONMENT 221(2019).