Meteorological observation with Doppler and Raman lidars and comparison with numerical weather simulations

Hidetoshi Tamura; Naoto Kihara; Takashi Fujii; Tetsuo Fukuchi; Koji Wada; Hiromaru Hirakuchi

doi:10.1117/12.977360

19 November 2012 Meteorological observation with Doppler and Raman lidars and comparison with numerical weather simulations

Hidetoshi Tamura, Naoto Kihara, Takashi Fujii, Tetsuo Fukuchi, Koji Wada, Hiromaru Hirakuchi

Author Affiliations +

Proceedings Volume 8526, Lidar Remote Sensing for Environmental Monitoring XIII; 852611 (2012) https://doi.org/10.1117/12.977360
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

Meteorological observation data such as temperature, humidity, wind speed and wind direction are important for validating and improving numerical weather simulation models. Lidar is an effective method for acquiring such data with high range resolution and short time intervals. In this study, we carried out a field observation with coherent Doppler Lidar and Raman Lidar systems at the coastal area of Yokosuka, Japan, and compared the observed data with the results of numerical weather simulations. We obtained the vertical profiles of horizontal wind speeds and wind directions by Doppler Lidar with 65 m vertical range resolution, and the vertical profiles of the water vapor mixing ratio by Raman Lidar with 20 m vertical range resolution at the lower atmospheric boundary layer (200-600 m height from ground level). These data were acquired at time intervals of 10 minutes. We found an interesting phenomenon from observed data indicating that, under weak wind conditions, water vapor in the atmosphere significantly increased just after a definite change in wind direction from land breeze to sea breeze. A similar phenomenon was also predicted by the numerical weather simulation with the same meteorological and terrestrial conditions. We analyzed the numerical results and found that the change in water vapor mentioned above is mainly caused by the difference between the evaporation from land and sea surfaces, which were located upwind of the land and sea breezes, respectively.

Citation Download Citation

Hidetoshi Tamura, Naoto Kihara, Takashi Fujii, Tetsuo Fukuchi, Koji Wada, and Hiromaru Hirakuchi "Meteorological observation with Doppler and Raman lidars and comparison with numerical weather simulations", Proc. SPIE 8526, Lidar Remote Sensing for Environmental Monitoring XIII, 852611 (19 November 2012); https://doi.org/10.1117/12.977360

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KEYWORDS

LIDAR

Doppler effect

Raman spectroscopy

Computer simulations

Data modeling

Environmental sensing

Meteorology

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