气候变化领域集成服务门户(CCPortal): Systematic Patterns in Land Precipitation Due to Convection in Neighboring Islands in the Maritime Continent During MJO Propagation

CCPortal

DOI	10.1029/2020JD033465
	Systematic Patterns in Land Precipitation Due to Convection in Neighboring Islands in the Maritime Continent During MJO Propagation
	Tan H.; Ray P.; Barrett B.; Dudhia J.; Moncrieff M.W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	The land-sea contrast in the Maritime Continent (MC) has been found to influence the Madden–Julian Oscillation (MJO). However, the specific contribution from individual islands to the precipitation over the surrounding islands during MJO propagation is not well known. We found that when an island is removed in the presence of lower-tropospheric westerlies, precipitation increases over islands that are located to its east due to the strengthening of the westerlies. Frictional convergence of the stronger westerlies, aided by Coriolis, leads to an increase in vertical advection of moisture and precipitation over an island located to the east. On the other hand, the reduced heating over the removed island reduces the westerlies and precipitation to the west of the removed island and is consistent with the response of large-scale circulation to tropical heating. During background easterlies prior to MJO arrival, a systematic decrease in precipitation was found in the surrounding islands to the west side of the removed island. But, on the eastern side of the removed island, no systematic change in precipitation was found. The results imply that changes in large-scale circulation in response to convection (or a lack thereof) over a removed island may significantly influence precipitation in the neighboring islands. Therefore, biases in model precipitation over an island in the MC may arise from bias in precipitation over a neighboring island. Moreover, the presence of different island chains in the MC has led to a more conducive environment for more overall precipitation over the islands in the MC. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	land–sea contrast; Madden–Julian Oscillation; Maritime Continent; westerly winds
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/185483
作者单位	Meteorology, Ocean Engineering and Marine Sciences, Florida Institute of Technology, Melbourne, FL, United States; Oceanography Department, US Naval Academy, Annapolis, MD, United States; Mesoscale & Microscale Meteorology Lab, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Tan H.,Ray P.,Barrett B.,et al. Systematic Patterns in Land Precipitation Due to Convection in Neighboring Islands in the Maritime Continent During MJO Propagation[J],2021,126(4).
APA	Tan H.,Ray P.,Barrett B.,Dudhia J.,&Moncrieff M.W..(2021).Systematic Patterns in Land Precipitation Due to Convection in Neighboring Islands in the Maritime Continent During MJO Propagation.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Tan H.,et al."Systematic Patterns in Land Precipitation Due to Convection in Neighboring Islands in the Maritime Continent During MJO Propagation".Journal of Geophysical Research: Atmospheres 126.4(2021).