气候变化领域集成服务门户(CCPortal): In Situ Observations of the Diurnal Variation in the Boundary Layer of Mature Hurricanes

CCPortal

DOI	10.1029/2019GL086206
	In Situ Observations of the Diurnal Variation in the Boundary Layer of Mature Hurricanes
	Zhang J.A.; Dunion J.P.; Nolan D.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Recent studies have suggested that the structure of tropical cyclones (TCs), especially the upper-level clouds as indicated by satellite infrared brightness temperatures and precipitation, fluctuates with the diurnal cycle. The diurnal cycle of the low-level structure, including the boundary layer, has not yet been investigated with observations. This study analyzes data from 2242 GPS dropsondes collected in mature hurricanes to investigate the diurnal variation of the mean boundary layer structure. A composite analysis is conducted to compare the kinematic and thermodynamic structure during nighttime (0–6 local time) vs in the afternoon (12–18 local time). The composites show that much stronger inflow occurs during nighttime and the moist entropy is also larger than that in the daytime. Grouping the dropsonde data into 6-h time windows relative to the local time shows a clear diurnal signal of boundary layer inflow. The amplitude of the diurnal signal is largest at a radius of 250–500 km. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Hurricanes; Precipitation (meteorology); Storms; Boundary layer structure; Composite analysis; Diurnal cycle; In-situ observations; Infrared brightness temperature; Low-level structures; Thermodynamic structures; Tropical cyclone; Boundary layers; boundary layer; brightness temperature; diurnal variation; GPS; hurricane; Hurricane Andrew 1992; in situ measurement; observational method; thermodynamics; tropical cyclone
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170797
作者单位	Hurricane Research Division, NOAA/AOML, Miami, FL, United States; Cooperative Institute for Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States; Department of Atmospheric Sciences, University of Miami, Miami, FL, United States
推荐引用方式 GB/T 7714	Zhang J.A.,Dunion J.P.,Nolan D.S.. In Situ Observations of the Diurnal Variation in the Boundary Layer of Mature Hurricanes[J],2020,47(3).
APA	Zhang J.A.,Dunion J.P.,&Nolan D.S..(2020).In Situ Observations of the Diurnal Variation in the Boundary Layer of Mature Hurricanes.Geophysical Research Letters,47(3).
MLA	Zhang J.A.,et al."In Situ Observations of the Diurnal Variation in the Boundary Layer of Mature Hurricanes".Geophysical Research Letters 47.3(2020).