Measurements of Radiation Components at Mizuho Station, East Antarctica in 1979

元データ 国立極地研究所

概要

Radiation budget measurements were made at Mizuho Station under the program of POLEX-South. Global and reflected shortwave down-ward and upward longwave radiations were measured at the snow surface and at the top of a 30m tower. Direct solar radiation was also measured at the snow surface. The spectral measurements of shortwave radiation divided into four wavelength regions were made. Sensitivity constants of the pyranometers used for the measurement of global and reflected radiations showed large deviation from the cosine law response at a low solar elevation. Field calibration of the pyranometers was made extensively and some realistic equation to derive the global radiation under a broken sky from several calibration factors was proposed. As for the longwave radiation measurements, the pyrgeometer was equipped with a simple shading ring in order to eliminate the heating effect of the hemispherical dome due to solar radiation. Diurnal and seasonal variations of radiation components are shown and those of the net radiation are also given. Daily totals of the net radiation remain negative even in the summer for the clear sky, on account of high albedo of the snow surface and large upward longwave radiation compared with the downward. Downward longwave radiation was much more sensitive than the global radiation to the cloud amount and controlled the daily variations of the net balance.

著者

Kawaguchi Sadao Nagaoka National College Of Technology
Wada Makoto National Institute For Polar Research
Morimoto S National Institute Of Polar Research Organization Of Information And Systems
Mae Shinji National Institute Of Polar Research Research Organization Of Information And Systems
KAWAGUCHI Sadao National Institute of Polar Research
Yamanouchi Takashi National Institute For Polar Research
Morimoto S National Inst. Polar Res. Tokyo Jpn
Satow K Nagaoka National College Of Technology
Mae S National Institute Of Polar Research Research Organization Of Information And Systems
Tsukamura Koji Japan Meteorological Agency
Mae Shinji Department Of Applied Physics Hokkaido University
Mae Shinji National Institute Of Polar Research
Koga S National Inst. Resources And Environment Tsukuba
Yamada T Geosystems Inc.
Kawaguchi Sadao Nagoya University
Yamanouchi Takashi National Inst. Of Polar Res. And Dep. Of Polar Sci. The Graduate Univ. For Advanced Studies 10-3 Mid
Mae Shinji National Institute For Resources And Environment
Koga S Nagaoka National College Of Technology
Wada Makoto National Inst. Polar Res. Tokyo

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