Uncertainty analysis of aerosol wavelength exponent measured by Raman-Mie lidars
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Center of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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Corresponding author:
HU Huan-ling, hlhu@aiofm.ac.cn
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Received Date:
2007-07-04
Accepted Date:
2007-10-09
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Abstract
In order to improve the measuring accuracy of aerosol wavelength exponent measured by Raman-Mie lidar(RML),the uncertainty propagation formula was used to analyze the uncertainty in detail.The uncertainties of signal,transmission ratio and assumed scattering ratio Rc were calculated based on the data measured over the west suburb of the city of Hefei.Commonly,below 6km,assuming the relative uncertainty of reference value of the scattering ratio Rc was dfined by the difference between the reference and real valves,the uncertainty of the signal and the transmission ratio was less than 30% and 4% respectively.The analytical results showed that the uncertainty of aerosol wavelength exponent could be reduced by increasing pulsed laser energy,prolonging signal collecting time and more accurately demarcating assumed Rc.
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References
[1]
|
OKADA Y,MUKAI S,SINGH R P.Changes in atmospheric aerffsol parameters after Gujarat earthquake of January 26,2001[J].Advances in Space Research,2004,33(3):254-258. |
[2]
|
WANG Y S,XIN J Y,LI Zh Q,et al.Aod and angstrom parameters of aerosol observed by the Chinese sun hazemeter Network from august to december 2004[J].Environmental Science,2006,27(9):1703-1710(in Chinese). |
[3]
|
ZHAO X J,CHEN Ch H,YUAN T,et al.Lanzhou aerosol optical depth in winter and their relation with visibility[J].Plateau Meteorology,2005,24(4):617-622(in Chinese). |
[4]
|
BAI Y B,SHI G Y,KOICHI T,et al.Lidar observations of atmospheric aerosol properties over Lhasa[J].Chinese Journal of Atmospheric Sciences,2000,24(4):559-567(in Chinese). |
[5]
|
WHITEMAN D N,MELFI S H,FERRARE R A.Raman lidar system for the measurements of water and aerosols in the earth's atmosphere[J].Appl Opt,1992,31(16):3068-3082. |
[6]
|
ZHONG Zh Q,ZHOU J,SUN D S,et al.The research of error analysis and simulation of aerosol detected by MPL[J].Laser Technology,2006,30(3):232-234(in Chinese). |
[7]
|
COLLINS R L,BROWN K P,GARDNER C S.Polar stratospheric clouds at the south pole in 1990s:lidar observation and analysis[J].Journal of Geophysical Research,1993,98(1):1001-1010. |
[8]
|
KLETT J.Stable analytical inversion solution for processing lidar returns[J].Appl Opt,1981,20(2):211-220. |
[9]
|
RUSSEL P B,SWISSER T J,MCCORMICK M P.Methodology for error analysis and simulation of lidar aerosol measurements[J].Appl Opt,1979,18(22):3783-3797. |
[10]
|
YIN H.Atmospheric radiation basic[M].Beijing:Meteorological Press,1993:144-145(in Chinese). |
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Proportional views
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