DOI: 10.1002/jgrd.50570
论文题名: Improved boundary layer depth retrievals from MPLNET
作者: Lewis J.R. ; Welton E.J. ; Molod A.M. ; Joseph E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 17 起始页码: 9870
结束页码: 9879
语种: 英语
英文关键词: lidar
; mixing layer
; MPLNET
; PBL depth
Scopus关键词: Image processing
; Optical radar
; Radiosondes
; Goddard earth observing systems
; Micro-pulse lidar networks
; Mixing layers
; MPLNET
; Operational algorithms
; PBL depth
; Planetary boundary layers
; Radiosonde measurements
; Algorithms
; algorithm
; boundary layer
; data set
; EOS
; image processing
; lidar
; mixing
; observational method
; radiosonde
; seasonal variation
; wavelet
; Greenbelt
; Maryland
; United States
英文摘要: Continuous lidar observations of the planetary boundary layer (PBL) depth have been made at the Micropulse Lidar Network (MPLNET) site in Greenbelt, Maryland, since April 2001. However, because of issues with the operational PBL depth algorithm, the data are not reliable for determining seasonal and diurnal trends. Therefore, an improved PBL depth algorithm has been developed which uses a combination of the wavelet technique and image processing. The new algorithm is less susceptible to contamination by clouds and residual layers and, in general, produces lower PBL depths. A 2010 comparison shows the operational algorithm overestimates the daily mean PBL depth when compared to the improved algorithm (1.85 and 1.07 km, respectively). The improved MPLNET PBL depths are validated using radiosonde comparisons, which suggests the algorithm performs well to determine the depth of a fully developed PBL. A comparison with the Goddard Earth Observing System version 5 (GEOS-5) model suggests that the model may underestimate the maximum daytime PBL depth by ∼410 m during the spring and summer. The best agreement between MPLNET and GEOS-5 occurred during the fall and they differed the most in the winter. Key Points An improved PBL depth algorithm has been developed for MPLNETThe algorithm shows good agreement to radiosonde measurements of the PBLThe algorithm shows reasonable agreement to the GEOS-5 mode ©2013. 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/63368
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, United States; NASA Goddard Space Flight Center, Code 612, Greenbelt, MD 20771, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Global Modeling and Assimilation Office, Greenbelt, MD, United States; Beltsville Center for Climate System Observation, Howard University, Washington, DC, United States
Recommended Citation:
Lewis J.R.,Welton E.J.,Molod A.M.,et al. Improved boundary layer depth retrievals from MPLNET[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(17)