气候变化领域集成服务门户(CCPortal): Towards a Mechanistic Understanding of Precipitation Over the Far Eastern Tropical Pacific and Western Colombia, One of the Rainiest Spots on Earth

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DOI	10.1029/2020JD033415
	Towards a Mechanistic Understanding of Precipitation Over the Far Eastern Tropical Pacific and Western Colombia, One of the Rainiest Spots on Earth
	Mejía J.F.; Yepes J.; Henao J.J.; Poveda G.; Zuluaga M.D.; Raymond D.J.; Fuchs-Stone Ž.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	According to Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) satellite precipitation composites, a broad maritime area over the far eastern tropical Pacific and western Colombia houses one of the rainiest spots on Earth. This study aims to present a suite of mechanistic drivers that help create such a world-record-breaking rainy spot. Previous research has shown that this oceanic and nearly continental precipitation maximum has a strong early morning precipitation peak and a high density of mesoscale convective systems. We examined new and unique observational evidence highlighting the role of both dynamical and thermodynamical drivers in the activation and duration of organized convection. Results showed the existence of a rather large combination of mechanisms, including: (1) dynamics of the Choco (ChocoJet) and Caribbean Low-Level Jets along their confluence zone, including the Panama semi-permanent low; (2) ChocoJet deceleration offshore is favored by land breeze, enhancing the nighttime and early morning low-level convergence; (3) a wind sheared environment that conforms to the long-lived squall line theory; (4) action of mid-level gravity waves, which further support the strong diurnal variability; and (5) mesoscale convective vortices related to subsidence in the stratiform region and top-heavy mass flux profiles. This study emphasizes the multiscale circulation and thermodynamics mechanisms associated with the formation of one of the rainiest spots on Earth and showcases new observations gathered during the Organization of Tropical East Pacific Convection field campaign (OTREC; August–September, 2019) that support the outlined mechanisms. © 2021. The Authors.
英文关键词	gravity waves; mesoscale convective systems; mesoscale convective vortex; OTREC; Shear; vorticity
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185439
作者单位	Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, United States; Department of Geosciences and Environment, Universidad Nacional de Colombia, Medellín, Colombia; GIGA, Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia, Medellín, Colombia; Climate and Water Consortium, New Mexico Tech, Socorro, NM, United States; Physics Department, New Mexico Tech, Socorro, NM, United States
推荐引用方式 GB/T 7714	Mejía J.F.,Yepes J.,Henao J.J.,et al. Towards a Mechanistic Understanding of Precipitation Over the Far Eastern Tropical Pacific and Western Colombia, One of the Rainiest Spots on Earth[J],2021,126(5).
APA	Mejía J.F..,Yepes J..,Henao J.J..,Poveda G..,Zuluaga M.D..,...&Fuchs-Stone Ž..(2021).Towards a Mechanistic Understanding of Precipitation Over the Far Eastern Tropical Pacific and Western Colombia, One of the Rainiest Spots on Earth.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Mejía J.F.,et al."Towards a Mechanistic Understanding of Precipitation Over the Far Eastern Tropical Pacific and Western Colombia, One of the Rainiest Spots on Earth".Journal of Geophysical Research: Atmospheres 126.5(2021).