Open AccessFeature of formation of the Black Sea surface layer temperature during air cold intrusions
Author(s) -
А. А. Сизов,
А. А. Сизов,
T. M. Bayankina,
Т М Баянкина
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524874443-447
Subject(s) - thermocline , mesoscale meteorology , mixed layer , geology , climatology , sink (geography) , drifter , atmospheric sciences , oceanography , geography , physics , cartography , lagrangian , mathematical physics
Application of the results of the drifter observations performed in the western Black Sea permitted to show that during air cold intrusions (CI) in winter accompanied by the wind (10 m/c and more), the upper mixed layer (UML) was cooled by 0,1-0,2 °C in course of a day. At that the seasonal thermocline (ST) and the cold intermediate water (CIW) sink deeper; after CI is over these layers rise to the depths smaller than their previous ones. It results in decrease of temperature in UML and its increase, as compared to the period preceding CI, in the layer below ST. The process of the sea upper layer mixing is explained by the fact that anti-cyclonic mesoscale vortices are involved in it.