Cyclonic and anticyclonic contributions to atmospheric energetics

Abstract Migratory cyclones and anticyclones account for most of the day-to-day weather variability in the extratropics. These transient eddies act to maintain the midlatitude jet streams by systematically transporting westerly momentum and heat. Yet, little is known about the separate contributions...

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Autores principales:	Satoru Okajima, Hisashi Nakamura, Yohai Kaspi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5fbc0288a1f041abb0adb30da4fbc2a4
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spelling	oai:doaj.org-article:5fbc0288a1f041abb0adb30da4fbc2a42021-12-02T18:02:44ZCyclonic and anticyclonic contributions to atmospheric energetics10.1038/s41598-021-92548-72045-2322https://doaj.org/article/5fbc0288a1f041abb0adb30da4fbc2a42021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92548-7https://doaj.org/toc/2045-2322Abstract Migratory cyclones and anticyclones account for most of the day-to-day weather variability in the extratropics. These transient eddies act to maintain the midlatitude jet streams by systematically transporting westerly momentum and heat. Yet, little is known about the separate contributions of cyclones and anticyclones to their interaction with the westerlies. Here, using a novel methodology for identifying cyclonic and anticyclonic vortices based on curvature, we quantify their separate contributions to atmospheric energetics and their feedback on the westerly jet streams as represented in Eulerian statistics. We show that climatological westerly acceleration by cyclonic vortices acts to dominantly reinforce the wintertime eddy-driven near-surface westerlies and associated cyclonic shear. Though less baroclinic and energetic, anticyclones still play an important role in transporting westerly momentum toward midlatitudes from the upper-tropospheric thermally driven jet core and carrying eddy energy downstream. These new findings have uncovered essential characteristics of atmospheric energetics, storm track dynamics and eddy-mean flow interaction.Satoru OkajimaHisashi NakamuraYohai KaspiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Satoru Okajima Hisashi Nakamura Yohai Kaspi Cyclonic and anticyclonic contributions to atmospheric energetics
description	Abstract Migratory cyclones and anticyclones account for most of the day-to-day weather variability in the extratropics. These transient eddies act to maintain the midlatitude jet streams by systematically transporting westerly momentum and heat. Yet, little is known about the separate contributions of cyclones and anticyclones to their interaction with the westerlies. Here, using a novel methodology for identifying cyclonic and anticyclonic vortices based on curvature, we quantify their separate contributions to atmospheric energetics and their feedback on the westerly jet streams as represented in Eulerian statistics. We show that climatological westerly acceleration by cyclonic vortices acts to dominantly reinforce the wintertime eddy-driven near-surface westerlies and associated cyclonic shear. Though less baroclinic and energetic, anticyclones still play an important role in transporting westerly momentum toward midlatitudes from the upper-tropospheric thermally driven jet core and carrying eddy energy downstream. These new findings have uncovered essential characteristics of atmospheric energetics, storm track dynamics and eddy-mean flow interaction.
format	article
author	Satoru Okajima Hisashi Nakamura Yohai Kaspi
author_facet	Satoru Okajima Hisashi Nakamura Yohai Kaspi
author_sort	Satoru Okajima
title	Cyclonic and anticyclonic contributions to atmospheric energetics
title_short	Cyclonic and anticyclonic contributions to atmospheric energetics
title_full	Cyclonic and anticyclonic contributions to atmospheric energetics
title_fullStr	Cyclonic and anticyclonic contributions to atmospheric energetics
title_full_unstemmed	Cyclonic and anticyclonic contributions to atmospheric energetics
title_sort	cyclonic and anticyclonic contributions to atmospheric energetics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5fbc0288a1f041abb0adb30da4fbc2a4
work_keys_str_mv	AT satoruokajima cyclonicandanticycloniccontributionstoatmosphericenergetics AT hisashinakamura cyclonicandanticycloniccontributionstoatmosphericenergetics AT yohaikaspi cyclonicandanticycloniccontributionstoatmosphericenergetics
_version_	1718378869749186560

Cyclonic and anticyclonic contributions to atmospheric energetics

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