Entropy flux through the oceanatmosphere boundary as an integral indicator of the ocean climate change
https://doi.org/10.26428/1606-9919-2025-205-728-736
EDN: MDSIMQ
Abstract
Climatic trend of the entropy flux across the water-air boundary is determined for the oceanographic section along 180o meridian in the Pacific Ocean. The flux is calculated on the average annual data for SST and components of heat balance with 4-degree spatial resolution for 1979–2024. The flux is negative with the value ~3 . 10–2 W/m2K and has a tendency toward zero. Mean rate of the turbulent energy dissipation per unit mass is evaluated as ~2.10–7 m2/s3. Different trends in thermal conditions for the «closed» and «open» polar areas in the Southern and Northern Hemispheres, respectively, are discussed. Possible feedback of the parameters toward climate stability is noted: the lower the entropy flux, the weaker water dynamics, and the higher SST difference between tropical and polar zones, that leads to reverse process of increasing the entropy flux and returns the ocean back to its previous stationary state.
Supporting agencies: The authors are thankful to anonymous reviewers for their valuable comments useful for the article. The study was funded from the budget of Pacific Oceanological Institute, Far-Eastern branch of Russian Ac. Sci. in the frameworks of two state assignments, as «Study of climatic aspects of natural gas distribution in marine waters and coastal areas, as well as related phenomena and processes» (registration number 125051406034-3) and «Study of the structure and dynamics of the waters of the World Ocean under conditions of modern climate change» (registration number 124022100079-4).
About the Authors
T. R. Kilmatov
Pacific Oceanological Institute; Maritime State University
Russian Federation
Russian Federation
Talgat R. Kilmatov, D.Phys.-Math., professor
43, Baltiyskaya Str., Vladivostok, 690041;
50, Verkhneportovaya Str., Vladivostok, 690003
N. I. Rudykh
Pacific Oceanological Institute
Russian Federation
Russian Federation
Natalia I. Rudykh, Ph.D., senior researcher
43, Baltiyskaya Str., Vladivostok, 690041
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Review
For citations:
Kilmatov T.R., Rudykh N.I. Entropy flux through the oceanatmosphere boundary as an integral indicator of the ocean climate change. Izvestiya TINRO. 2025;205(4):728-736. (In Russ.) https://doi.org/10.26428/1606-9919-2025-205-728-736. EDN: MDSIMQ
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