Abstracts for the 6th International GAME Conf.
3-5 December 2004
Kyoto Japan
Surface Heat Balance using Flux Measurement Array during Catch A Plume by SATs (CAPS) IOP
Sachinobu ISHIDA (1), Kenji TANAKA (2), Atsushi HIGUCHI (3), Ichiro TAMAGAWA (4), Dai MATUSHIMA (5), CAPS2002-2003 observation group (6)
(1) Department of Earth and Environmental Sciences, Hirosaki University
(2) Disaster Prevention Research Institute, Kyoto University
(3) Hydrospheric Atmospheric Research Center, Nagoya University
(4) River Basin Research Center, Gifu University
(5) Graduate school of Science, Tohoku University
(6) Many Affiliations
The intensive meteorological observation, CAPS (Catch A Plume by SATs), was carried out twice over postharvest paddy field in northern Shiga prefecture, JAPAN in 2002, 2003. The objective of this project is to understand 1) the distribution of the sensible heat flux over homogeneous surface, and 2) it's influence for surface heat balance; 3) the behavior of the plume, which affects the temporal and spatial distribution of the sensible heat flux. The SATs array and the scintillometers were installed to measure the heterogeneity of the heat flux, with other instruments to complete the surface energy balance. Also surface temperature images were taken by the infrared camera from airplane. And the upper ABL sounding was held using a radio sonde, two SODARs and a lidar. This study is focused on the objective 1) and 2). In CAPS2002, the distance of each SAT was O(100m), and the array was extended 500x1500m horizontally using 16 SATs. The heat balance closure ratio was about 60%. The difference between max. and min. sensible heat flux was almost equal to the random error, and was about 30% of mean flux (77W/m^2) during 9-15 local time in clear condition, and the difference seems to be correspond to the surface temperature distribution. But this difference still does not explain the absence of heat. In CAPS2003, the distance of each SAT was O(10m), and the array was extended 100x200m horizontally using 17 SATs. The difference ratio of the sensible heat flux was smaller than CAPS2002. And the heat balance closure ratio was about 100% by averaging data of the multiple measurement sites.
Submittal Information
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Department of Earth and Environmental Sciences, Hirosaki University | |
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Bunkyo-cho 3, Hirosaki, Aomori 036-8561 | |
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ishida@cc.hirosaki-u.ac.jp | |