气候变化领域集成服务门户(CCPortal): Hydrographic effects of an intense “medicane” over the central-eastern Mediterranean Sea in 2018

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DOI	10.1016/j.dynatmoce.2020.101185
	Hydrographic effects of an intense “medicane” over the central-eastern Mediterranean Sea in 2018
	Kassis D.; Varlas G.
发表日期	2021
ISSN	03770265
卷号	93
英文摘要	The formation of cyclones over the sea surface is driven by air-sea interaction with feedbacks on wave generation, thermohaline structures, and biochemical properties of upper-ocean layers. In the Mediterranean basin, strong cyclonic systems having tropical-like characteristics are called “medicanes”. The consequences of such events are usually assessed over the land, however, hydrographic effects are particularly difficult to be quantified mostly due to the rarity of oceanographic in-situ monitoring systems. In this study, the hydrographic effects of a high-impact medicane, crossing the central-eastern Mediterranean in late September 2018 are investigated mainly based on Argo float measurements. We traced its hydrographic fingerprint and examined its effects on the upper-layer physical properties by analyzing temperature and salinity profiles from floats that overlapped with its track. Float data is supported by satellite sea surface temperature reanalysis data and meteorological records. The synergistic effects of intense evaporation and vertical mixing mechanisms triggered by the medicane, resulted in abrupt surface cooling, especially in the Ionian and Aegean Seas. A relatively homogenous decrease of temperature in the upper 50-m-depth layer followed, along with the deepening of the mixed-layer depth, corresponding to an estimated per profile average deficit of (-2.72 ± 1.23) x 108 J m−2 in the ocean heat content. Simultaneously, significant upper-layer freshening occurred because of vertical mixing and heavy rainfall. However, a salinity increase in the subsurface waters was observed after the medicane event, which is associated with both horizontal advection and vertical mixing which followed the weakening of the Atlantic Water signal and the dominance of the Levantine Surface Water in this zone. Our findings highlight strong, short-scale hydrographic alterations made available due to the expansion of the marginal seas operational oceanographic network. © 2020 Elsevier B.V.
英文关键词	Air-sea interaction; Argo floats; Cyclones; Oceanic processes; Regional seas; Upper-ocean cooling
语种	英语
scopus关键词	Atmospheric temperature; Mixing; Oceanography; Storms; Surface waters; Air sea interactions; Biochemical properties; Eastern Mediterranean; Eastern Mediterranean sea; Horizontal advection; Meteorological records; Sea surface temperature (SST); Thermohaline structures; Hydrographic surveys; advection; air-sea interaction; Argo; cooling; cyclone; hydrograph; mixed layer; rainfall; upper ocean; vertical mixing; Aegean Sea; Ionian Sea; Mediterranean 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/178282
作者单位	Institute of Oceanography, Hellenic Centre for Marine Research, PO Box 712, Anavyssos, Attica GR-190 13, Greece; Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, Anavyssos, Attica GR-190 13, Greece
推荐引用方式 GB/T 7714	Kassis D.,Varlas G.. Hydrographic effects of an intense “medicane” over the central-eastern Mediterranean Sea in 2018[J],2021,93.
APA	Kassis D.,&Varlas G..(2021).Hydrographic effects of an intense “medicane” over the central-eastern Mediterranean Sea in 2018.Dynamics of Atmospheres and Oceans,93.
MLA	Kassis D.,et al."Hydrographic effects of an intense “medicane” over the central-eastern Mediterranean Sea in 2018".Dynamics of Atmospheres and Oceans 93(2021).