The Role of Nonlocal Processes in Upper Layer Heat Budget in the North Atlantic

International science and technology conference "Earth science"

Polonsky, A.B.^1 ; Sukhonos, P.A.^1

Institute of Natural and Technical Systems, Lenin Street, 28, Sevastopol

299011, Russia^1

关键词: Advection and diffusions;    Decadal variability;    Decadal variations;    Mixed layer temperature;    Ocean-atmosphere interactions;    Physical process;    Relative contribution;    Spatiotemporal variability;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022169/pdf
DOI  :  10.1088/1755-1315/272/2/022169

来源: IOP

【 摘 要 】

The physical processes that determine spatio-temporal variability of the upper mixed layer (UML) temperature in the North Atlantic have been investigated. The study of physical processes is based on the closed UML heat budget. The components for the mixed layer temperature balance are computed using the monthly data from ORA-S3 ocean reanalysis over the period 1959 - 2011. This paper deals with the relative contribution of heat budget terms into generating the both intra-annual and interannual-to-decadal variations of the UML temperature. The result of the study shows that the local heat flux on the ocean surface plays a major role in the intra-annual cycle of the UML temperature, while the nonlocal processes, such as advection and diffusion of heat, affect the interannual-decadal variability of the UML temperature. The obtained results are vital for studying the physics of ocean-atmosphere interactions.