Seasonality and trend of the global upper-ocean vertical velocity over 1998-2017

doi:10.1016/j.pocean.2022.102804

IOCAS-IR > 海洋环流与波动重点实验室

	Seasonality and trend of the global upper-ocean vertical velocity over 1998-2017
	Liao, Fanglou 1,2; Gao, Guandong 3,4,5; Zhan, Peng 6,7; Wang, Yan 1,2
	2022-06-01
发表期刊	PROGRESS IN OCEANOGRAPHY
ISSN	0079-6611
卷号	204 页码:19
通讯作者	Liao, Fanglou([email protected]) ; Gao, Guandong([email protected]) ; Wang, Yan([email protected])
摘要	The ocean vertical circulation has been historically underappreciated compared to the lateral circulation, largely due to the poor availability of the ocean vertical-velocity information. With the advent of high-performance ocean models, especially those constrained by the most available observations, it is now possible and incentive to dig into the vertical branch of ocean circulation. In this study, we used a state-of-the-art and dynamically-consistent ocean state estimate to investigate the seasonal variations and trend of the global upper-ocean (in the top 200 m) vertical velocity, with emphasis on the widely recognized upwelling and downwelling systems. Significant seasonal variations were noted. All around the global ocean, the North Indian Ocean and the Equator exhibited the strongest seasonality. There existed an equatorial Rossby wave propagating the equatorial Pacific upwelling at a phase speed of approximately -0.60 m/s (westward). Over 1998-2017, there were not basin-scale patterns of statistically-significant trend in the upper-ocean vertical velocity. In addition, our results did not support the classical Bakun's 1990 hypothesis on the upwelling intensification along the major eastern boundary upwelling systems in the context of global warming. This, however, may be due to the short period considered in this study. Four extended datasets were also examined. Patterns of seasonal variations were largely robust among these datasets. Results from these extended datasets further confirmed that there were not basin-scale patterns of statistically significant intensification or weakening of vertical circulations in the top 200 m of the global ocean during 1998-2017.
关键词	Ocean vertical velocity Upwelling Downwelling Seasonality Rossby wave
DOI	10.1016/j.pocean.2022.102804
收录类别	SCI
语种	英语
资助项目	Research Grants Council of Hong Kong[ECS26307720]; Research Grants Council of Hong Kong[GRF16305321]; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[SMSEGL20SC01]; National Natural Science Foundation of China[42006004]; National Natural Science Foundation of China[42090044]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000830148700001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179827
专题	海洋环流与波动重点实验室
通讯作者	Liao, Fanglou; Gao, Guandong; Wang, Yan
作者单位	1.Hong Kong Univ Sci & Technol, Dept Ocean Sci, Hong Kong, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 3.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Ctr Mega Sci, Qingdao 266071, Peoples R China 6.Southern Univ Sci & Technol SUSTech, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China 7.King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal 23955, Saudi Arabia
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Liao, Fanglou,Gao, Guandong,Zhan, Peng,et al. Seasonality and trend of the global upper-ocean vertical velocity over 1998-2017[J]. PROGRESS IN OCEANOGRAPHY,2022,204:19.
APA	Liao, Fanglou,Gao, Guandong,Zhan, Peng,&Wang, Yan.(2022).Seasonality and trend of the global upper-ocean vertical velocity over 1998-2017.PROGRESS IN OCEANOGRAPHY,204,19.
MLA	Liao, Fanglou,et al."Seasonality and trend of the global upper-ocean vertical velocity over 1998-2017".PROGRESS IN OCEANOGRAPHY 204(2022):19.