Validation and Evaluation of GRACE-FO Estimates with In Situ Bottom Pressure Array Measurements in the South China Sea

doi:10.3390/rs15112804

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Validation and Evaluation of GRACE-FO Estimates with In Situ Bottom Pressure Array Measurements in the South China Sea
	Wang, Xuecheng 1,2; Zheng, Hua 1,3; Zhu, Xiao-Hua 1,2,3,4; Zhao, Ruixiang 1; Wang, Min 1,3; Chen, Juntian 1,2; Ma, Yunlong 1; Nan, Feng 5,6,7; Yu, Fei 5,6,7,8
刊名	REMOTE SENSING
	2023-05-28
卷号	15 期号:11 页码:17
关键词	Gravity Recovery and Climate Experiment pressure-recording inverted echo sounder abyssal circulation ocean bottom pressure South China Sea
DOI	10.3390/rs15112804
通讯作者	Zhu, Xiao-Hua(xhzhu@sio.org.cn)
英文摘要	The Gravity Recovery and Climate Experiment (GRACE), and its follow-on mission (GRACE-FO), provides a novel measurement of the variations in ocean bottom pressure (OBP) at global and basin scales, including those in marginal seas. However, these measurements have not yet been validated rigorously for the South China Sea (SCS). In this study, the accuracy in the monthly GRACE-FO mascon solutions in the SCS from the Jet Propulsion Laboratory (JPL), Center for Space Research (CSR), and Goddard Space Flight Center (GSFC) was validated with the results of the comparison with the in situ OBP records from an array of 25 pressure-recording inverted echo sounders (PIESs) that are located west of the Luzon Strait (LS). The correlation coefficient (Cor) and root mean square difference (RMSD) between the 10-month period of GSFC and PIES, spanning from July 2018 to June 2019 (with missing satellite data for August and September 2018), were 0.77 (p-value = 0.005) and 0.41 mbar (1 mbar = 100 Pa), respectively. These values suggest that the accuracy of GSFC in the SCS in this period was substantially better than that of JPL (Cor = 0.35, p-value = 0.16; RMSD = 0.74 mbar) and CSR (Cor = 0.25, p-value = 0.24; RMSD = 0.89 mbar). Moreover, the volume transport anomaly of the SCS abyssal circulation was estimated and compared based on the OBP records from GSFC and PIES observations, indicating that the GRACE-FO OBP (GSFC) can be used to monitor seasonal or longer-period variations in the SCS abyssal volume transport. Additionally, the variations in OBP from GRACE-FO were significantly overestimated on the continental shelf of the SCS, which may be attributed to signal leakage. Our findings provide reliable evidence for the application of long-term, fully covered OBP records from GRACE-FO in the SCS, and also offer a valuable reference for the application of GRACE-FO in other regions.
资助项目	National Natural Science Foundation of China[41920104006] ; National Natural Science Foundation of China[41906024] ; Scientific Research Fund of Second Institute of Oceanography, MNR[JZ2001] ; Scientific Research Fund of Second Institute of Oceanography, MNR[QNYC2102] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2106] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2207] ; Oceanic Interdisciplinary Program of Shanghai Jiao Tong University[SL2021MS021] ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311020004] ; Global Climate Changes and Air-sea Interaction Program[GASI-02-PAC-ST-Wwin]
WOS关键词	ATMOSPHERIC SURFACE PRESSURE ; CIRCULATION ; VARIABILITY ; WAVES
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:001005380200001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/182321]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Zhu, Xiao-Hua
作者单位	1.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Peoples R China 2.Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China 3.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai 200240, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 6.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao 266237, Peoples R China 8.Univ Chinese Acad Sci, Beijing 101408, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuecheng,Zheng, Hua,Zhu, Xiao-Hua,et al. Validation and Evaluation of GRACE-FO Estimates with In Situ Bottom Pressure Array Measurements in the South China Sea[J]. REMOTE SENSING,2023,15(11):17.
APA	Wang, Xuecheng.,Zheng, Hua.,Zhu, Xiao-Hua.,Zhao, Ruixiang.,Wang, Min.,...&Yu, Fei.(2023).Validation and Evaluation of GRACE-FO Estimates with In Situ Bottom Pressure Array Measurements in the South China Sea.REMOTE SENSING,15(11),17.
MLA	Wang, Xuecheng,et al."Validation and Evaluation of GRACE-FO Estimates with In Situ Bottom Pressure Array Measurements in the South China Sea".REMOTE SENSING 15.11(2023):17.