| Issue |
EPJ Web of Conferences
Volume 119, 2016
The 27th International Laser Radar Conference (ILRC 27)
|
|
|---|---|---|
| Article Number | 25007 | |
| Number of page(s) | 4 | |
| Section | Poster Session (Advances in Lidar Technologies and Techniques III) | |
| DOI | https://doi.org/10.1051/epjconf/201611925007 | |
| Published online | 07 June 2016 | |
https://doi.org/10.1051/epjconf/201611925007
Independent Calibration of Water Vapor Raman Lidar by using Additional Elastic Measurements at Water Vapor Raman Wavelength
1 Department of Atmospheric Sciences, University of Wyoming, WY 82070, USA
2 Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui 230031, China
* Email: dwu5@uwyo.edu
Published online: 7 June 2016
A new method for independent calibration of water vapor Raman lidar by using additional measurements of elastic signals at water vapor Raman wavelength was introduced. The water vapor mixing ratio calibration constant was derived from nitrogen mixing ratio calibration constant and Rayleigh to water vapor Raman backscattering cross section ratio. The nitrogen mixing ratio calibration constant with uncertainties of 1~2% can be determined from the nitrogen mixing ratio measurement in an aerosolfree zone in the upper troposphere with the additional elastic measurement and nitrogen Raman measurement, the Rayleigh to water vapor Raman backscattering cross section ratio can be calculated with uncertainties of about 8%, or can be determined experimentally with uncertainties of less than 5%. Using the experimental cross section ratio, a total uncertainty of the water vapor calibration less than 6% is possible to achieve. Because this calibration method utilizes actual lidar signals in nitrogen and water vapor detection channels, the calibration can fully capture lidar state changes.
© Owned by the authors, published by EDP Sciences, 2016
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