Cloud optical depth measurement comparison between a Raman-Mie and Mie elastic lidar

Yonghua Wu; Shuki Chaw; Barry Gross; Fred Moshary; Sam Ahmed

doi:10.1117/12.800401

20 October 2008 Cloud optical depth measurement comparison between a Raman-Mie and Mie elastic lidar

Yonghua Wu, Shuki Chaw, Barry Gross, Fred Moshary, Sam Ahmed

Proceedings Volume 7111, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IV; 71110Q (2008) https://doi.org/10.1117/12.800401
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

In this paper, the properties of Low-level clouds are explored with a Raman-elastic lidar. In particular, we examine two complementary methods to measure thin cloud optical depth (COD). The first is direct integration of Raman Derived extinction while the second method utilizes a regression technique. We show that if we correct for aerosol influences the regression method for low cloud optical depth can be dramatically improved. Furthermore, estimates of extinction to backscatter ratio can be made within the cloud. We find that when the lidar ratio in cloud is averaged over the vertical extent, an S ratio on the order of 20 sr is found which is consistent with conventional water phase cloud droplet models.

Citation Download Citation

Yonghua Wu, Shuki Chaw, Barry Gross, Fred Moshary, and Sam Ahmed "Cloud optical depth measurement comparison between a Raman-Mie and Mie elastic lidar", Proc. SPIE 7111, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IV, 71110Q (20 October 2008); https://doi.org/10.1117/12.800401

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