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Atmosphere 2015, 6(4), 521-533; doi:10.3390/atmos6040521

Long-Term Measurement for Low-Tropospheric Water Vapor and Aerosol by Raman Lidar in Wuhan

1
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1,2,3
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4,5,* and 3,6
1
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430079, China
2
Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China
3
Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy, Wuhan 430079, China
4
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China
5
School of Resource and Environmental Science of Wuhan University, Wuhan 430079, China
6
School of Science, Hubei University of Technology, Wuhan 430068, China
*
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 14 February 2015 / Revised: 26 March 2015 / Accepted: 30 March 2015 / Published: 3 April 2015
View Full-Text   |   Download PDF [933 KB, uploaded 3 April 2015]   |  

Abstract

A Raman Lidar (RL) system is developed to measure the water vapor mixing ratio (WVMR) and aerosol optical property in Wuhan with high temporal-spatial resolution during rainless nights. The principle of the self-developed lidar system and data processing method are discussed. WVMR profiles of a representative case retrieved by RL, Radiosonde (RS), and microwave radiometer (MR) are in good agreement. The relationship of WVMR and aerosol optical depth (AOD) indicates that water vapor dramatically reduces with the decline of the AOD. Moreover, the mean relative difference of mean WVMRs at low-troposphere obtained by RL and RS (MR) is about 5.17% (9.47%) during the analyzed year. The agreement certifies that the self-developed RL system can stably provide accurate and high temporal-spatial resolution data for the fundamental physical studies on water vapor. Furthermore, the maximum AOD from 0.5 km to 3 km is 0.41 at night in spring, which indicates that the air quality in Wuhan is heavily influenced by aerosols that are transported by air mass from the north during this time. Moreover, abundant rainfall led to relatively low AOD in summer (0.22), which demonstrates that water vapor is crucial for air purification. View Full-Text
Keywords: aerosol optical depth; water vapor; Raman Lidar; microwave radiometer aerosol optical depth; water vapor; Raman Lidar; microwave radiometer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, W.; Gong, W.; Mao, F.; Zhang, J. Long-Term Measurement for Low-Tropospheric Water Vapor and Aerosol by Raman Lidar in Wuhan. Atmosphere 2015, 6, 521-533.

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