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The life cycle of m...
The life cycle of meridional heat flux peaks
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- Marcheggiani, Andrea (författare)
- Department of Meteorology University of Reading Reading UK
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- Ambaum, Maarten H. P. (författare)
- Department of Meteorology University of Reading Reading UK
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- Messori, Gabriele (författare)
- Uppsala universitet,Stockholms universitet,Meteorologiska institutionen (MISU),Uppsala University, Sweden,Luft-, vatten- och landskapslära,Department of Earth Sciences and Centre of Natural Hazards and Disaster Science (CNDS); Department of Meteorology and Bolin Centre for Climate Research Stockholm University Stockholm Sweden
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(creator_code:org_t)
- 2022-02-23
- 2022
- Engelska.
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Ingår i: Quarterly Journal of the Royal Meteorological Society. - : Wiley. - 0035-9009 .- 1477-870X. ; 148:744, s. 1113-1126
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Abstract
Ämnesord
Stäng
- Covariance between meridional wind and air temperature in the lower troposphere quantifies the poleward flux of dry static energy in the atmosphere; in the midlatitudes, this is primarily realised by baroclinic weather systems. It is shown that strong covariance between temperature and meridional wind results from both enhanced correlation and enhanced variance, and that the two evolve according to a distinct temporal structure akin to a life-cycle. Starting from a state of low correlation and variance, there is first a gradual build-up to modal growth at constant, high correlation, followed by a rapid decay at relatively low correlation values. This life-cycle evolution is observed most markedly over oceanic regions, and cannot be explained on purely statistical grounds. We find that local peaks of meridional heat flux are not exclusively linked to the action of individual weather systems and can affect the atmospheric circulation on larger length-scales through wave propagation along waveguides.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Nyckelord
- atmosphere
- meridional heat flux
- midlatitudes
- Rossby waves
- synoptic
- weather regimes
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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