Research Papers

Lidar and microwave radiometer observations of planetary boundary layer structure under light wind weather

[+] Author Affiliations
Ning Zhang, Wenjing Zhao

Nanjing University, School of Atmospheric Sciences, Nanjing 210093, China

Yan Chen

Jiangsu Climate Center, Nanjing 210008, China

J. Appl. Remote Sens. 6(1), 063513 (Apr 11, 2012). doi:10.1117/1.JRS.6.063513
History: Received September 15, 2011; Revised February 14, 2012; Accepted February 15, 2012
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Abstract.  The planetary boundary layer (PBL) structures on four light wind days at Suzhou city, China were analyzed with both micropulse lidar (MPL) and passive microwave radiometer (MWR). The planetary boundary layer height (PBLH) was estimated with the first-derivation method from the lidar observations. The lidar-observed PBLH and microwave radiometer observations were used to estimate the lapse rate in a simple encroachment model. Under light wind conditions in this area, the nocturnal PBLH is about 300 to 400 m. The maximum of PBLH was about 800 to 1000 m. The daytime PBL development could be divided into three periods: growing, maintenance, and decay. The PBLH is nearly linear in the growing period with a growth ratio of about 110 to 120m/h. The encroachment model lapse rate was calculated from the MPL and MWR observations. The lapse rate γ is estimated in the four days and the average is about 0.0010K/m. The vertical structure of air temperature and humidity were also analyzed with the microwave radiometer observations. Diurnal variations of relative humidity in the boundary layer partly explain the light fog appearing at night during this period.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Topics

LIDAR ; Humidity

Citation

Ning Zhang ; Yan Chen and Wenjing Zhao
"Lidar and microwave radiometer observations of planetary boundary layer structure under light wind weather", J. Appl. Remote Sens. 6(1), 063513 (Apr 11, 2012). ; http://dx.doi.org/10.1117/1.JRS.6.063513


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