Comparisons of the Raman lidar measurements of the tropospheric water vapor profiles with radiosondes, meteorological observation tower, and GPS at Tsukuba, Japan

Tetsu Sakai; Tomohiro Nagai; Masahisa Nakazato; Takatsugu Matsumura; Narihiro Orikasa; Yoshinori Shoji

doi:10.1117/12.689734

3 October 2006 Comparisons of the Raman lidar measurements of the tropospheric water vapor profiles with radiosondes, meteorological observation tower, and GPS at Tsukuba, Japan

Tetsu Sakai, Tomohiro Nagai, Masahisa Nakazato, Takatsugu Matsumura, Narihiro Orikasa, Yoshinori Shoji

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Proceedings Volume 6367, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing II; 63670D (2006) https://doi.org/10.1117/12.689734
Event: SPIE Remote Sensing, 2006, Stockholm, Sweden

Abstract

The vertical distributions of the water vapor mixing ratio (w) were measured by Raman lidar at the Meteorological Research Institute, Japan, in 2000 to 2004. The measured values were compared with those obtained with radiosondes, hygrometers on the meteorological observation tower, and Global Positional System (GPS) antennas. The values of w obtained with the lidar agreed within 9% with those obtained with the Meisei RS2-91 radiosonde for w > 0.5 g/kg^-1. However, they were systematically higher than those obtained with the Vaisala RS80-A radiosonde for that region. The vertical variations of w obtained with the lidar were similar to those obtained with the Meisei RS-01G and Meteolabor Snow White radiosondes for w > 0.3 g/kg^-1. The temporal variations of w obtained with the lidar were similar to those obtained with the hygrometers at heights between 50 and 213 m on the tower, although the absolute values differed systematically due to the incomplete overlap of the laser beam and the receiver's field of view at the lower heights. The precipitable water vapor content obtained with the lidar generally agreed with those obtained with GPS, except for the period when the large spatial inhomogeneity of w was present.

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Tetsu Sakai, Tomohiro Nagai, Masahisa Nakazato, Takatsugu Matsumura, Narihiro Orikasa, and Yoshinori Shoji "Comparisons of the Raman lidar measurements of the tropospheric water vapor profiles with radiosondes, meteorological observation tower, and GPS at Tsukuba, Japan", Proc. SPIE 6367, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing II, 63670D (3 October 2006); https://doi.org/10.1117/12.689734

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KEYWORDS

LIDAR

Raman spectroscopy

Sensors

Global Positioning System

Calibration

Environmental sensing

Humidity

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