气候变化领域集成服务门户(CCPortal): Physical Mechanisms Controlling the Offshore Propagation of Convection in the Tropics: 1. Flat Island

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DOI	10.1029/2019MS001793
	Physical Mechanisms Controlling the Offshore Propagation of Convection in the Tropics: 1. Flat Island
	Coppin D.; Bellon G.
发表日期	2019
ISSN	19422466
起始页码	3042
结束页码	3056
卷号	11 期号:9
英文摘要	An idealized convection-permitting simulation is performed to investigate the physical mechanisms responsible for the nighttime offshore propagation of convection around tropical islands. An idealized island is placed in the middle of a long, nonrotating channel oceanic domain with constant sea surface temperature. A strong diurnal cycle typical of a tropical island is simulated, with a thermally forced sea breeze in daytime and the associated inland propagation of precipitation. Offshore propagation of a land breeze and its associated convection is simulated every night but with varying extent. Gravity waves of first and second baroclinic modes trigger convection far from the coast if the offshore conditions are favorable. This accelerates the propagation speed of the land breeze as it reduces the onshore wind associated with the lower branch of the overturning large-scale circulation. Higher-order modes may trigger convection or reinforce existing convection but less systematically. The distance of propagation is particularly sensitive to humidity and temperature at the top of the boundary layer, with occasional incursions of a dry anomaly at the top of the boundary layer near the island preventing convection from developing far from the island. ©2019. The Authors.
英文关键词	convection; gravity waves; land breeze; offshore propagation; sea breeze; tropical islands
语种	英语
scopus关键词	Atmospheric movements; Boundary layers; Gravity waves; Heat convection; Oceanography; Offshore oil well production; Surface waters; Tropics; Humidity and temperatures; Land breezes; Large-scale circulation; Offshore conditions; Physical mechanism; Sea breeze; Sea surface temperature (SST); Tropical island; Landforms; atmospheric convection; boundary layer; gravity wave; land breeze; oceanic circulation; precipitation (climatology); sea breeze; sea surface temperature; tropical region
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156857
作者单位	Department of Physics, University of Auckland, Auckland, New Zealand
推荐引用方式 GB/T 7714	Coppin D.,Bellon G.. Physical Mechanisms Controlling the Offshore Propagation of Convection in the Tropics: 1. Flat Island[J],2019,11(9).
APA	Coppin D.,&Bellon G..(2019).Physical Mechanisms Controlling the Offshore Propagation of Convection in the Tropics: 1. Flat Island.Journal of Advances in Modeling Earth Systems,11(9).
MLA	Coppin D.,et al."Physical Mechanisms Controlling the Offshore Propagation of Convection in the Tropics: 1. Flat Island".Journal of Advances in Modeling Earth Systems 11.9(2019).