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RAS Earth ScienceИзвестия Российской академии наук. Физика атмосферы и океана Izvestiya, Atmospheric and Oceanic Physics

  • ISSN (Print) 0002-3515
  • ISSN (Online) 3034-6487

ON EDDY HEAT FLUXES AND ENTROPY PRODUCTION IN THE JET FLOW REGION AND ON THE EARTH'S SURFACE IN THE CLIMATE MODEL INM RAS

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PII
S30346487S0002351525030054-1
DOI
10.7868/S3034648725030054
Publication type
Article
Status
Published
Authors
V.N. Krupchatnikov
  • Affiliation:
    Institute of Computational Mathematics and Mathematical Geophysics SB RAS
    Obukhov Institute of Atmospheric Physics, RAS
A.V. Gochakov
  • Affiliation: Siberian Regional Research Hydrometeorological Institute
O.Yu. Antokhina
  • Affiliation: Zuev Institute of Atmospheric Optics SB RAS
V.S. Gradov
  • Affiliation: Institute of Computational Mathematics and Mathematical Geophysics SB RAS
I.V. Borovko
  • Affiliation: Institute of Computational Mathematics and Mathematical Geophysics SB RAS
Volume/ Edition
Volume 61 / Issue number 3
Pages
340-351
Abstract
This paper discusses some results of the study of eddy heat fluxes in the vicinity of a subtropical jet stream. Many large-scale dynamical phenomena in the Earth's atmosphere are associated with Rossby wave propagation and collapse processes. Here we focus on regions of counter-gradient eddy heat fluxes in the region of the subtropical jet stream in the Northern Hemisphere associated with Rossby wave overturning. In these regions, we observe meridional energy transfer on the northern flank of the jet stream in the equatorial direction from the ERA-5 reanalysis data and simulation data with the INM-CM4-8 climate model of the G.I. Marchuk Institute of Computational Mathematics of the Russian Academy of Sciences. The entropy production due to horizontal heat transfer becomes negative, since heat is transferred against the temperature gradient, but this is not a violation of the second law of thermodynamics, since the main part of entropy production occurs due to the processes of vertical heat transfer, such as convection, and other irreversible processes. Entropy production is sensitive to land cover, the entropy balance being most related to radiation at the surface. Quantifying the thermodynamic balance of entropy and entropy production is a useful metric for evaluating the interactions of the atmosphere-surface system. Some estimates of entropy production by the surface are presented in this paper. The traditional approach to studying the climate system focuses on the dynamic mechanisms and physical processes responsible for the conversion of energy from one form to another, but an approach based on analyzing the entropy balance of the climate system and especially entropy production is also important.
Keywords
турбулентность обрушение волн Россби струйные течения вихревые потоки тепла моделирование климата баланс и производство энтропии
Date of publication
01.03.2025
Year of publication
2025
Number of purchasers
0
Views
51

References

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