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Comparison of CALIPSO and ground-based lidar profiles over Chung-Li, Taiwan |
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| Authors: | Chih-Wei Chiang Subrata Kumar Das Huang-Shih Liao |
| Affiliation: | a Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan b Department of Physics, National Central University, Chung-Li, Taiwan c Department of Chemistry, National Central University, Chung-Li, Taiwan |
| Abstract: | We report the first inter-comparison of vertical profiles of aerosols and clouds derived from space (CALIPSO) and ground based lidar over Chung-Li, Taiwan. Results show that inter-comparison is closer in case of aerosols than clouds. The strength/shortcoming of the comparison has been also discussed. An iterative calculation to retrieve extinction-to-backscatter ratio (lidar ratio) by using sun-photometer and CALIPSO data is also documented. By using the mentioned method, a mean lidar ratio of 23.5±8.2 sr was found. The derived lidar ratios are lower than former studies. The possible reasons for the difference have been discussed in this paper. The discussed methodology will be helpful to reduce the uncertainty of optical parameters derived from lidar data especially near the surface where the atmosphere is inhomogeneous. |
| Keywords: | CALIPSO Lidar Aerosol Extinction-to-backscatter ratio |
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