气候变化领域集成服务门户(CCPortal): Detecting and tracking coastal precipitation in the tropics: Methods and insights into multiscale variability of tropical precipitation

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DOI	10.1175/JCLI-D-19-0321.1
	Detecting and tracking coastal precipitation in the tropics: Methods and insights into multiscale variability of tropical precipitation
	COPPIN D.; BELLON G.; PLETZER A.; SCOTT C.
发表日期	2020
ISSN	0894-8755
起始页码	6689
结束页码	6705
卷号	33 期号:15
英文摘要	We propose an algorithm to detect and track coastal precipitation systems and we apply it to 18 years of the high-resolution (8 km and 30 min) Climate Prediction Center CMORPH precipitation estimates in the tropics. Coastal precipitation in the Maritime Continent and Central America contributes to up to 80% of the total rainfall. It also contributes strongly to the diurnal cycle over land with the largest contribution from systems lasting between 6 and 12 h and contributions from longer-lived systems peaking later in the day. While the diurnal cycle of coastal precipitation is more intense over land in the summer hemisphere, its timing is independent of seasons over both land and ocean because the relative contributions from systems of different lifespans are insensitive to the seasonal cycle. We investigate the hypothesis that coastal precipitation is enhanced prior to the arrival of the Madden-Julian oscillation (MJO) envelope over the Maritime Continent. Our results support this hypothesis and show that, when considering only coastal precipitation, the diurnal cycle appears reinforced even earlier over islands than previously reported. We discuss the respective roles of coastal and large-scale precipitation in the propagation of the MJO over the Maritime Continent. We also document a shift in diurnal cycle with the phases of the MJO, which results from changes in the relative contributions of short-lived versus long-lived coastal systems. © 2020 American Meteorological Society.
英文关键词	Climatology; Tropics; Climate prediction centers; Coastal precipitation; Large-scale precipitation; Madden-Julian oscillation; Maritime Continent; Multiscale variability; Relative contribution; Tropical precipitation; Precipitation (meteorology); algorithm; detection method; diurnal variation; Madden-Julian oscillation; precipitation assessment; rainfall; tracking; tropical environment; Central America
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171239
作者单位	Physics Department, University of Auckland, Auckland, New Zealand; New Zealand eScience Infrastructure, National Institute of Water and Atmospheric Research, Wellington, New Zealand; New Zealand eScience Infrastructure, University of Auckland, Auckland, New Zealand
推荐引用方式 GB/T 7714	COPPIN D.,BELLON G.,PLETZER A.,et al. Detecting and tracking coastal precipitation in the tropics: Methods and insights into multiscale variability of tropical precipitation[J],2020,33(15).
APA	COPPIN D.,BELLON G.,PLETZER A.,&SCOTT C..(2020).Detecting and tracking coastal precipitation in the tropics: Methods and insights into multiscale variability of tropical precipitation.Journal of Climate,33(15).
MLA	COPPIN D.,et al."Detecting and tracking coastal precipitation in the tropics: Methods and insights into multiscale variability of tropical precipitation".Journal of Climate 33.15(2020).