气候变化领域集成服务门户(CCPortal): Pronounced impact of salinity on rapidly intensifying tropical cyclones

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DOI	10.1175/BAMS-D-19-0303.1
	Pronounced impact of salinity on rapidly intensifying tropical cyclones
	Balaguru K.; Foltz G.R.; Ruby Leung L.; Kaplan J.; Xu W.; Reul N.; Chapron B.
发表日期	2020
ISSN	00030007
起始页码	E1497
结束页码	E1511
卷号	101 期号:9
英文摘要	Tropical cyclone (TC) rapid intensification (RI) is difficult to predict and poses a formidable threat to coastal populations. A warm upper ocean is well known to favor RI, but the role of ocean salinity is less clear. This study shows a strong inverse relationship between salinity and TC RI in the eastern Caribbean and western tropical Atlantic due to near-surface freshening from the Amazon-Orinoco River system. In this region, rapidly intensifying TCs induce a much stronger surface enthalpy flux compared to more weakly intensifying storms, in part due to a reduction in SST cooling caused by salinity stratification. This reduction has a noticeable positive impact on TCs undergoing RI, but the impact of salinity on more weakly intensifying storms is insignificant. These statistical results are confirmed through experiments with an ocean mixed layer model, which show that the salinity-induced reduction in SST cold wakes increases significantly as the storm's intensification rate increases. Currently, operational statistical-dynamical RI models do not use salinity as a predictor. Through experiments with a statistical RI prediction scheme, it is found that the inclusion of surface salinity significantly improves the RI detection skill, offering promise for improved operational RI prediction. Satellite surface salinity may be valuable for this purpose, given its global coverage and availability in near-real time. © 2020 American Meteorological Society For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy.
语种	英语
scopus关键词	Forecasting; Hurricanes; Oceanography; Tropics; Inverse relationship; Ocean mixed layers; Prediction schemes; Rapid intensification; Salinity stratification; Statistical-dynamical; Surface enthalpies; Western tropical atlantic; Storms
来源期刊	Bulletin of the American Meteorological Society
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177935
作者单位	Pacific Northwest National Laboratory, Richland, WA, United States; NOAA, Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; Laboratoire d'Océanographie Physique et Spatiale, Ifremer, Brest, France
推荐引用方式 GB/T 7714	Balaguru K.,Foltz G.R.,Ruby Leung L.,et al. Pronounced impact of salinity on rapidly intensifying tropical cyclones[J],2020,101(9).
APA	Balaguru K..,Foltz G.R..,Ruby Leung L..,Kaplan J..,Xu W..,...&Chapron B..(2020).Pronounced impact of salinity on rapidly intensifying tropical cyclones.Bulletin of the American Meteorological Society,101(9).
MLA	Balaguru K.,et al."Pronounced impact of salinity on rapidly intensifying tropical cyclones".Bulletin of the American Meteorological Society 101.9(2020).