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Balloons and equipment
Instruments and data
Some features of the observed temperature distribu
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actinometer advection albedo amplitude anemometers annual variation Antarctic approximately April ascents atmosphere average Chapt circumscribed halo circumzenithal arc Cist clear sky clear-sky cloud amount coefficients computed connection considered correlation corresponding curves daily decrease dense overcast diagram diurnal variation drifting snow easterly Figure flux formula frequency distribution frost-mist halo height horizon ice-crystals increase insolation instrument interdiurnal intervals January July knots latter layer levels long-wave radiation lower lowest ly min-1 m/sec magnitude March Maudheim maximum mean temperature mean values measurements meteorological metres monthly mean months obtained parhelia parhelic circle period plates polar potential temperature pressure probably pyrgeometer radiosonde seasonal Sept snow-surface solar altitude solar radiation southerly winds Spitsbergen standard deviation stations stratosphere Subpart surface inversion Table tangential arc Temp thermometers tion tropopause troposphere turbulent heat transfer upper vertical pillar visibility weather wind direction wind speed winter half-year