Oscillations in deep-open-cells during winter Mediterranean cyclones

Abstract Open cloud cells can be described in ideal form as connected clouds that surround spots of isolated clear skies in their centers. This cloud pattern is typically associated with marine stratocumulus (MSc) that form in the oceanic boundary layer. However, it can form in deeper convective clo...

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Autores principales:	Huan Liu, Ilan Koren, Orit Altaratz, Reuven H. Heiblum, Pavel Khain, Xiaoran Ouyang, Jianping Guo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/aee649c5fb31486ba75087aa1c1c5c6e
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spelling	oai:doaj.org-article:aee649c5fb31486ba75087aa1c1c5c6e2021-12-02T15:52:37ZOscillations in deep-open-cells during winter Mediterranean cyclones10.1038/s41612-021-00168-92397-3722https://doaj.org/article/aee649c5fb31486ba75087aa1c1c5c6e2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41612-021-00168-9https://doaj.org/toc/2397-3722Abstract Open cloud cells can be described in ideal form as connected clouds that surround spots of isolated clear skies in their centers. This cloud pattern is typically associated with marine stratocumulus (MSc) that form in the oceanic boundary layer. However, it can form in deeper convective clouds as well. Here, we focus on deep-open-cells (with tops reaching up to ~5–7 km) that form in the post-frontal regions of winter Mediterranean cyclones, and examine their properties and evolution. Using a Lagrangian analysis of satellite data, we show that deep-open-cells have a larger equivalent diameter (~58 ± 18 km) and oscillate with a longer periodicity (~3.5 ± 1 h) compared to shallow MSc. A numerical simulation of one Cyprus low event reveals that precipitation-generated convergence and divergence dynamic patterns are the main driver of the open cells’ organization and oscillations. Thus, our findings generalize the mechanism attributed to the behavior of shallow marine cells to deeper convective systems.Huan LiuIlan KorenOrit AltaratzReuven H. HeiblumPavel KhainXiaoran OuyangJianping GuoNature PortfolioarticleEnvironmental sciencesGE1-350Meteorology. ClimatologyQC851-999ENnpj Climate and Atmospheric Science, Vol 4, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
spellingShingle	Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Huan Liu Ilan Koren Orit Altaratz Reuven H. Heiblum Pavel Khain Xiaoran Ouyang Jianping Guo Oscillations in deep-open-cells during winter Mediterranean cyclones
description	Abstract Open cloud cells can be described in ideal form as connected clouds that surround spots of isolated clear skies in their centers. This cloud pattern is typically associated with marine stratocumulus (MSc) that form in the oceanic boundary layer. However, it can form in deeper convective clouds as well. Here, we focus on deep-open-cells (with tops reaching up to ~5–7 km) that form in the post-frontal regions of winter Mediterranean cyclones, and examine their properties and evolution. Using a Lagrangian analysis of satellite data, we show that deep-open-cells have a larger equivalent diameter (~58 ± 18 km) and oscillate with a longer periodicity (~3.5 ± 1 h) compared to shallow MSc. A numerical simulation of one Cyprus low event reveals that precipitation-generated convergence and divergence dynamic patterns are the main driver of the open cells’ organization and oscillations. Thus, our findings generalize the mechanism attributed to the behavior of shallow marine cells to deeper convective systems.
format	article
author	Huan Liu Ilan Koren Orit Altaratz Reuven H. Heiblum Pavel Khain Xiaoran Ouyang Jianping Guo
author_facet	Huan Liu Ilan Koren Orit Altaratz Reuven H. Heiblum Pavel Khain Xiaoran Ouyang Jianping Guo
author_sort	Huan Liu
title	Oscillations in deep-open-cells during winter Mediterranean cyclones
title_short	Oscillations in deep-open-cells during winter Mediterranean cyclones
title_full	Oscillations in deep-open-cells during winter Mediterranean cyclones
title_fullStr	Oscillations in deep-open-cells during winter Mediterranean cyclones
title_full_unstemmed	Oscillations in deep-open-cells during winter Mediterranean cyclones
title_sort	oscillations in deep-open-cells during winter mediterranean cyclones
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/aee649c5fb31486ba75087aa1c1c5c6e
work_keys_str_mv	AT huanliu oscillationsindeepopencellsduringwintermediterraneancyclones AT ilankoren oscillationsindeepopencellsduringwintermediterraneancyclones AT oritaltaratz oscillationsindeepopencellsduringwintermediterraneancyclones AT reuvenhheiblum oscillationsindeepopencellsduringwintermediterraneancyclones AT pavelkhain oscillationsindeepopencellsduringwintermediterraneancyclones AT xiaoranouyang oscillationsindeepopencellsduringwintermediterraneancyclones AT jianpingguo oscillationsindeepopencellsduringwintermediterraneancyclones
_version_	1718385591313235968

Oscillations in deep-open-cells during winter Mediterranean cyclones

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