DOI: 10.1029/2017JD028060
Scopus记录号: 2-s2.0-85047493499
论文题名: Characteristics of Water Vapor Turbulence Profiles in Convective Boundary Layers During the Dry and Wet Seasons Over Darwin
作者: Osman M.K. ; Turner D.D. ; Heus T. ; Newsom R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 10 起始页码: 4818
结束页码: 4836
语种: 英语
英文关键词: coefficient of the structure function
; Darwin
; Oklahoma
; Raman lidar
; water vapor turbulence
; wet and dry seasons
英文摘要: This study explores water vapor turbulence in the convective boundary layer (CBL) using the Raman lidar observations from the Atmospheric Radiation Measurement site located at Darwin, Australia. An autocovariance technique was used to separate out the random instrument error from the atmospheric variability during time periods when the CBL is cloud-free, quasi-stationary, and well mixed. We identified 45 cases, comprising of 8 wet and 37 dry seasons events, over the 5-year data record period. The dry season in Darwin is known by warm and dry sunny days, while the wet season is characterized by high humidity and monsoonal rains. The inherent variability of the latter resulted in a more limited number of cases during the wet season. Profiles of the integral scale, variance, coefficient of the structure function, and skewness were analyzed and compared with similar observations from the Raman lidar at the Atmospheric Radiation Measurement Southern Great Plains (SGP) site. The wet season shows larger median variance profiles than the dry season, while the median profile of the variance from the dry season and the SGP site are found to be more comparable particularly between 0.4 and 0.75 zi. The variance and coefficient of the structure function show qualitatively the same vertical pattern. Furthermore, deeper CBL, larger gradient of water vapor mixing ratio at zi, and the strong correlation with the water vapor variance at zi are seen during the dry season. The median value in the skewness is mostly positive below 0.6 zi unlike the SGP site. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113841
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Institute for Mesoscale Meteorological Studies, The University of Oklahoma, and NOAA/National Severe Storms Laboratory, Norman, OK, United States; NOAA Earth System Research Laboratory, Global Systems Division, Boulder, CO, United States; Department of Physics, Cleveland State University, Cleveland, OH, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Osman M.K.,Turner D.D.,Heus T.,et al. Characteristics of Water Vapor Turbulence Profiles in Convective Boundary Layers During the Dry and Wet Seasons Over Darwin[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)