Characterization of meteorological parameters, solar radiation and effect of clouds at two antarctic sites, and comparison with satellite estimates Caracterización de parámetros meteorológicos, radiación solar y efecto de las nubes en dos sitios antárticos, y comparación con estimaciones satelitales

• Main Authors: Eduardo A. Luccini, Hugo Grossi Gallegos, Rubén D. Piacentini, Pablo O. Canziani
• Format: Article in Journal/Newspaper
• Language: English; Spanish
• Published: Centro Argentino de Meteorólogos 2005
• Subjects: Climatología; Península Antártica; Radiación solar; Meteorología; Nubes; Climatology; Antarctic Peninsula; Solar radiation; Meteorology; Clouds; Meteorology. Climatology; QC851-999; Antarctic; Arctic; Corto; Invierno; The Antarctic; Antarc*; Antártica
• Online Access: https://doaj.org/article/1e3e06c3d1b64c3eadadae206748988d

The analysis of measurements of daily mean temperature, daily mean relative humidity and daily total solar irradiation for the period 1979-1985, at the Antarctic stations Almirante Brown (64.9ºS, 62.9ºW, 10m a.s.l., West of Antarctic Peninsula), and BelgranoII (77.9ºS, 34.6ºW, 250m a.s.l., East of Antarctic Peninsula) is presented. A short-term characterization of monthly averages was established. Typical temperatures for summer and winter were 2ºC and -7ºC respectively at Brown, and -2ºC and -20ºC at BelgranoII. Relative humidity was always above 60% at both stations. Both measured parameters enter also as input variables in model calculations of the equivalent clear-sky daily total irradiation for each day, to determine the effective cloud transmittance of solar radiation. The effect of cloudiness was stronger at Brown, where an average cloud transmittance of 49% was determined, while it was of 71% at BelgranoII. Average daily irradiation of 27.4MJ/m² in December at BelgranoII is within the highest reported world-wide. Also, some days show increases in the daily irradiation over 20% than that expected for clear-sky conditions. Antarctic solar irradiation levels are considerably higher than in the Arctic. Ground-based data are compared with the satellite database from NASA Surface Meteorology and Solar Energy Data Set. Se presenta el análisis de mediciones de temperatura media diaria, humedad relativa media diaria e irradiación solar total diaria, realizadas en el periodo 1979-1985 en las Bases Antárticas Almirante Brown (64.9ºS, 62.9ºO, 10m s.n.m., Oeste de Península Antártica) y BelgranoII (77.9ºS, 34.6ºO, 250m s.n.m., Este de Península Antártica). Se estableció una caracterización de corto plazo sobre medias mensuales. Las temperaturas típicas en verano e invierno fueron 2ºC y -7ºC respectivamente en Brown, y -2ºC y ‑20ºC en BelgranoII. La humedad relativa fue siempre sobre 60% en ambas estaciones. Estos dos parámetros entran como variables en cálculos de la irradiación solar diaria equivalente a cielo ...