气候变化领域集成服务门户(CCPortal): Revisiting the Global Patterns of Seasonal Cycle in Sea Surface Salinity

CCPortal

DOI	10.1029/2020JC016789
	Revisiting the Global Patterns of Seasonal Cycle in Sea Surface Salinity
	Yu L.; Bingham F.M.; Lee T.; Dinnat E.P.; Fournier S.; Melnichenko O.; Tang W.; Yueh S.H.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Argo profiling floats and L-band passive microwave remote sensing have significantly improved the global sampling of sea surface salinity (SSS) in the past 15 years, allowing the study of the range of SSS seasonal variability using concurrent satellite and in situ platforms. Here, harmonic analysis was applied to four 0.25° satellite products and two 1° in situ products between 2016 and 2018 to determine seasonal harmonic patterns. The 0.25° World Ocean Atlas (WOA) version 2018 was referenced to help assess the harmonic patterns from a long-term perspective based on the 3-year period. The results show that annual harmonic is the most characteristic signal of the seasonal cycle, and semiannual harmonic is important in regions influenced by monsoon and major rivers. The percentage of the observed variance that can be explained by harmonic modes varies with products, with values ranging between 50% and 72% for annual harmonic and between 15% and 19% for semiannual harmonic. The large spread in the explained variance by the annual harmonic reflects the large disparity in nonseasonal variance (or noise) in the different products. Satellite products are capable of capturing sharp SSS features on meso- and frontal scales and the patterns agree well with the WOA 2018. These products are, however, subject to the impacts of radiometric noises and are algorithm dependent. The coarser-resolution in situ products may underrepresent the full range of high-frequency small scale SSS variability when data record is short, which may have enlarged the explained SSS variance by the annual harmonic. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	argo; L-band passive microwave radiometer; remote sensing; sea surface salinity; seasonal cycle; water cycle
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/186409
作者单位	Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Chapman University, Orange, CA, United States; International Pacific Research Center, University of Hawaii, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Yu L.,Bingham F.M.,Lee T.,et al. Revisiting the Global Patterns of Seasonal Cycle in Sea Surface Salinity[J],2021,126(4).
APA	Yu L..,Bingham F.M..,Lee T..,Dinnat E.P..,Fournier S..,...&Yueh S.H..(2021).Revisiting the Global Patterns of Seasonal Cycle in Sea Surface Salinity.Journal of Geophysical Research: Oceans,126(4).
MLA	Yu L.,et al."Revisiting the Global Patterns of Seasonal Cycle in Sea Surface Salinity".Journal of Geophysical Research: Oceans 126.4(2021).