ON THE VERTICAL PROFILES OF LONG WAVE RADIATION AT SYOWA STATION IN ANTARCTICA
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概要
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Vertical profiles of long wave radiation have been measured with radiometersonde since 1966 at Syowa Station in Antarctica. The measurements have been carried out mainly from March to October of each year. Much data have been stored but most have not been analyzed or evaluated. Here the data from 1966 to 1988 were analyzed for respective sky conditions : cloudless, overcast and all conditions. The upward fluxes at the 100 mb and 850 mb levels, and the downward fluxes at those levels in each month, are discussed, and also the budgets of radiative flux in the atmosphere and at the ground surface for all three conditions are discussed. All downward and upward measured fluxes and those calculated are compared for cloudless conditions. The downward fluxes show good agreement with each other on average. But there are discrepancies in the case of upward flux. It can be inferred that the discrepancies might be caused by setting the ground surface temperature equal to the surface air temperature in calculation, and by the temperature change of the ground surface over location that the radiometersonde observed. There are 6 types of radiometersonde used which are basically almost the same as each other. Discrepancies among vertical profiles of the flux measured with each type are discussed by comparing with those obtained by theoretical calculations concerning only the downward flux for cloudless conditions. Generally the vertical profiles of flux measured with each type of radiometersonde agree well with those calculated except for one type.
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