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Coherence of Deep Convection in the Irminger Sea with Oceanic Heat Advectionстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 мая 2024 г.
- Авторы: Iakovleva D.A., Bashmachnikov I.L., Diansky N.A.
- Журнал: Oceanology
- Том: 63
- Номер: S1
- Год издания: 2023
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: S1
- Последняя страница: S10
- DOI: 10.1134/s0001437023070214
- Аннотация: The interannual variability of deep convection in the Irminger Sea is considered essential for regulation of the Atlantic Meridional Overturning Circulation (AMOC). Based on the ARMOR-3D oceanic dataset and the Era-Interim atmospheric reanalysis, we suggest that the convergence of oceanic heat, transported in the sea with the Irminger Current, governs the interdecadal variability of deep convection of the Irminger Sea by changing the heat content of the upper water layers in the basin. This forms a negative feedback that stabilizes the AMOC; e.g., an increase in the advection of oceanic heat in the Irminger Sea leads to a decrease in the convection depth, which further reduces northward heat transport by the AMOC.We suggest that, on interdecadal time scales, the effect of ocean–atmosphere heat exchange on deep convection is relatively small due to a much lower interannual variability of the former compared to that of the oceanic heat convergence. During the positive phase of the North Atlantic Oscillation (NAO), the Irminger Current becomes colder, which allows an alternative explanation for the spasmodically observed intensification of convection in the Irminger Sea with an increase in the NAO index. Thus, the long-period variability of the convection intensity in the Irminger Sea is associated not with local atmospheric influence, but rather with remote atmospheric forcing.
- Добавил в систему: Дианский Николай Ардальянович