Uncertainties of monthly ocean bottom pressure from Gravity Recovery and Climate Experiment (GRACE): a case study at the Drake Passage

被引：0
作者：
Chengcheng Yang
Xuhua Cheng
Jianhuang Qin
机构：
[1] Hohai University,Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources
[2] Hohai University,College of Oceanography
来源：
Geoscience Letters | / 10卷
关键词：
Ocean bottom pressure; GRACE; Drake Passage; Eddy kinetic energy;
D O I：
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摘要：
Several studies reported some aliasing errors of Ocean bottom pressure (OBP) data from Gravity Recovery and Climate Experiment (GRACE), although this data have been widely used to estimate the oceanic transports. In this study, the performances of monthly OBP data from six GRACE products with two different solutions are evaluated by comparisons with the observed records at the Drake Passage. Result shows that spherical harmonic products have a better ability to capture monthly OBP variability than mascon products at the Drake Passage. In all GRACE products, higher skills occur to the south of Polar Front than those in the northern Drake Passage, and the correlations with observations reach minimum in the Local Dynamics Array (LDA) region. Such spatial differences are mainly attributed to local mesoscale processes, accompanied with high-frequency bottom eddy kinetic energy (EKE). It indicates that the monthly OBP variations from GRACE products are not reliable in the eddy-rich regions.
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[31]  
Donohue KA(2004)GRACE measurements of mass variability in the Earth system Science undefined undefined-undefined
[32]  
Tracey KL(2012)Jets and topography: jet transitions and the impact on transport in the Antarctic circumpolar current J Phys Oceanogr undefined undefined-undefined
[33]  
Watts DR(2015)Mass-induced sea level variations in the Gulf of Carpentaria J Oceanogr undefined undefined-undefined
[34]  
Chidichimo MP(2023)Validation and evaluation of GRACE-FO estimates with in situ bottom pressure array measurements in the South China Sea Remote Sensing undefined undefined-undefined
[35]  
Chereskin TK(2015)Improved methods for observing Earth's time variable mass distribution with GRACE using spherical cap mascons J Geophys Res Solid Earth undefined undefined-undefined
[36]  
Dufour CO(1982)The net transport of the antarctic circumpolar current through Drake Passage J Phys Oceanogr undefined undefined-undefined
[37]  
Griffies SM(2020)Antarctic circumpolar current transport through Drake Passage: what can we learn from comparing high-resolution model results to observations? J Geophys Res Oceans. undefined undefined-undefined
[38]  
de Souza GF(2022)Weakening trend of luzon strait overflow transport in the past two decades Geophys Res Lett undefined undefined-undefined
[39]  
Frenger I(undefined)undefined undefined undefined undefined-undefined
[40]  
Morrison AK(undefined)undefined undefined undefined undefined-undefined
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