气候变化领域集成服务门户(CCPortal): Assessing the influence of large-scale environmental conditions on the rainfall structure of atlantic tropical cyclones: An observational study

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DOI	10.1175/JCLI-D-20-0376.1
	Assessing the influence of large-scale environmental conditions on the rainfall structure of atlantic tropical cyclones: An observational study
	KIM D.; HO C.-H.; MURAKAMI H.; PARK D.-S.R.
发表日期	2021
ISSN	08948755
起始页码	2093
结束页码	2106
卷号	34 期号:6
英文摘要	Understanding the mechanisms related to the variations in the rainfall structure of tropical cyclones (TCs) is crucial in improving forecasting systems of TC rainfall and its impact. Using satellite precipitation and reanalysis data, we examined the influence of along-track large-scale environmental conditions on inner-core rainfall strength (RS) and total rainfall area (RA) for Atlantic TCs during the TC season (July-November) from 1998 to 2019. Factor analysis revealed three major factors associated with variations in RS and RA: Large-scale low and high pressure systems [factor 1 (F1)]; environmental flows, sea surface temperature, and humidity [factor 2 (F2)]; and maximum wind speed of TCs [factor 3 (F3)]. Results from our study indicate that RS increases with an increase in the inherent primary circulation of TCs (i.e., F3) but is less affected by large-scale environmental conditions (i.e., F1 and F2), whereasRAis primarily influenced by large-scale low and high pressure systems (i.e., F1) over the entire North Atlantic and partially influenced by environmental flows, sea surface temperature, humidity, and maximum wind speed (i.e., F2 and F3). A multivariable regression model based on the three factors accounted for the variations of RS and RA across the entire basin. In addition, regional distributions of mean RS and RA from the model significantly resembled those from observations. Therefore, our study suggests that large-scale environmental conditions over the North Atlantic Ocean are important predictors for TC rainfall forecasts, particularly with regard to RA. © 2021 American Meteorological Society. All rights reserved.
英文关键词	Atlantic Ocean; Atmosphere; Rainfall; Satellite observations; Tropical cyclones
语种	英语
scopus关键词	Atmospheric temperature; Hurricanes; Oceanography; Regression analysis; Storms; Submarine geophysics; Surface properties; Surface waters; Tropics; Weather forecasting; Wind; Environmental conditions; High pressure system; Multivariable regression model; North Atlantic Ocean; Rainfall structures; Regional distribution; Satellite precipitation; Sea surface temperature (SST); Rain; atmosphere; environmental conditions; precipitation (climatology); rainfall; satellite data; tropical cyclone; weather forecasting; Atlantic Ocean
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/178687
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Department of Earth Science Education, Kyungpook National University, Daegu, South Korea
推荐引用方式 GB/T 7714	KIM D.,HO C.-H.,MURAKAMI H.,et al. Assessing the influence of large-scale environmental conditions on the rainfall structure of atlantic tropical cyclones: An observational study[J],2021,34(6).
APA	KIM D.,HO C.-H.,MURAKAMI H.,&PARK D.-S.R..(2021).Assessing the influence of large-scale environmental conditions on the rainfall structure of atlantic tropical cyclones: An observational study.Journal of Climate,34(6).
MLA	KIM D.,et al."Assessing the influence of large-scale environmental conditions on the rainfall structure of atlantic tropical cyclones: An observational study".Journal of Climate 34.6(2021).