气候变化领域集成服务门户(CCPortal): Accuracy of the deep convection intensity from a limited number of casts

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DOI	10.1016/j.dynatmoce.2020.101164
	Accuracy of the deep convection intensity from a limited number of casts
	Fedorov A.M.; Bashmachnikov I.L.
发表日期	2020
ISSN	03770265
卷号	92
英文摘要	Deep convection is one of the key components of the Atlantic Meridional Overturning Circulation. The intensity of deep convection (DC) is traditionally estimated as the maximum mixed layer depth (MMLD). In this study, we developed a criterion of the minimum number of casts needed for obtaining the MMLD in the Greenland Sea with a pre-defined accuracy. The criterion depends on convection intensity. For gridded datasets, we introduce a complementary measure for the DC intensity: the area of the region with the mixed layer depth over a predefined value (800 m for the Greenland Sea, notated as S800). For a weak or a moderate DC, variations of its intensity is more clear from variations of the MMLD (cluster 1 in the MMLD - S800 parameter space). Then the MMLD can be obtained with the 25 % accuracy for at minimum 40 casts during winter. For a well developed DC (cluster 2), variations of the DC intensity are better accessed from variations of S800 and minimum 10 casts are required. In the central Greenland Sea, the number of casts is sufficient for obtaining the interannual variations of the convection intensity only since 1986. If only Argo floats are available, minimum 4 floats should simultaneously operate in the Greenland Sea gyre during winter to reach the abovementioned accuracy. Up to present, the number of floats has been insufficient during most of the winters. © 2020 Elsevier B.V.
英文关键词	Accuracy of the estimates; Argo profilers; Deep convection intensity; The Greenland Sea
语种	英语
scopus关键词	Oceanography; Argo float; Atlantic meridional overturning circulations; Deep convection; Greenland Sea; Interannual variation; Mixed layer depths; Parameter spaces; Natural convection; accuracy assessment; annual variation; atmospheric convection; gyre; meridional circulation; mixed layer; winter; Arctic Ocean; Greenland Sea; Norwegian Sea
来源期刊	Dynamics of Atmospheres and Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178290
作者单位	Saint Petersburg State University, Department of Oceanography, Universitetskaya nab., 7-9, Saint Petersburg, 199034, Russian Federation; Nansen International Environmental and Remote Sensing Centre, 14-th Line V.O.,7, office 49, Saint Petersburg, 199034, Russian Federation
推荐引用方式 GB/T 7714	Fedorov A.M.,Bashmachnikov I.L.. Accuracy of the deep convection intensity from a limited number of casts[J],2020,92.
APA	Fedorov A.M.,&Bashmachnikov I.L..(2020).Accuracy of the deep convection intensity from a limited number of casts.Dynamics of Atmospheres and Oceans,92.
MLA	Fedorov A.M.,et al."Accuracy of the deep convection intensity from a limited number of casts".Dynamics of Atmospheres and Oceans 92(2020).