气候变化领域集成服务门户(CCPortal): Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data

CCPortal

DOI	10.1029/2020JC016560
	Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data
	Ubelmann C.; Dibarboure G.; Gaultier L.; Ponte A.; Ardhuin F.; Ballarotta M.; Faugère Y.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	Two methods for the mapping of ocean surface currents from satellite measurements of sea level and future current vectors are presented and contrasted. Both methods rely on the linear and Gaussian analysis framework with different levels of covariance definitions. The first method separately maps sea level and currents with single-scale covariance functions and leads to estimates of the geostrophic and ageostrophic circulations. The second maps both measurements simultaneously and projects the circulation onto four contributions: geostrophic, ageostrophic rotary, ageostrophic divergent, and inertial. When compared to the first method, the second mapping moderately improves the resolution of geostrophic currents but significantly improves estimates of the ageostrophic circulation, in particular near-inertial oscillations. This method offers promising perspectives for reconstructions of the ocean surface circulation. Even the hourly dynamics can be reconstructed from measurements made locally every few days because nearby measurements are coherent enough to help fill the gaps. Based on numerical simulation of ocean surface currents, the proposed SKIM mission that combines a nadir altimeter and a Doppler scatterometer with a 300 km wide swath (with a mean revisit time of 3 days) would allow the reconstruction of 50% of the near-inertial variance around an 18 h period of oscillation. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186440
作者单位	Ocean Next, La Terrasse, France; Centre National d'Etudes Spatiales, Toulouse, France; Ocean Data Lab, Plouzané, France; Ifremer, Plouzané, France; Collecte Localisation Satellite, Ramonville Saint Agne, France
推荐引用方式 GB/T 7714	Ubelmann C.,Dibarboure G.,Gaultier L.,et al. Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data[J],2021,126(3).
APA	Ubelmann C..,Dibarboure G..,Gaultier L..,Ponte A..,Ardhuin F..,...&Faugère Y..(2021).Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data.Journal of Geophysical Research: Oceans,126(3).
MLA	Ubelmann C.,et al."Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data".Journal of Geophysical Research: Oceans 126.3(2021).