One Year of Measurements with a POM-02 Sky Radiometer at an Alpine EuroSkyRad Station

Journal of the Meteorological Society of Japan. Ser. II

Monica CAMPANELLI¹  Henri DIÉMOZ³  Víctor ESTELLÉS² 

[1] Institute of Atmospheric Sciences and Climate, Italian National Research Council, Roma Tor Vergata, Italy;Dept. Física de la Terra i Termodinámica, Universitat de València, Burjassot, Spain;Environmental Protection Agency (ARPA), Saint-Christophe, Italy

关键词: atmospheric aerosol;    sun-sky radiometer;    mountain;    Saharan dust;    fires;    skyrad;   

DOI  :  10.2151/jmsj.2014-A01

学科分类：大气科学

来源: Meteorological Society of Japan

【 摘 要 】

 Aerosol optical properties at the Alpine station of Saint-Christophe, northern Italy are measured with a POM-02 sky radiometer. Diffuse radiances from the sky and direct sun irradiances are processed with SKYRAD and SUNRAD algorithms, respectively, providing consistent results. The aerosol optical depth at the station is generally very low (0.10 at a wavelength of 500 nm); however, spikes (up to 0.75) can occur due to the transport of Saharan dust and smoke clouds moving on an intercontinental scale, according to NAAPS and HYSPLIT models. In addition, the aerosol microphysical properties are analyzed by means of the Ångström exponent and its spectral variation, which allows discrimination between different types of particles and the assessment of possible contamination by clouds. Influence by local meteorology and anthropogenic emissions is investigated, providing useful information to understand the pollution dynamics in mountainous regions. Finally, we highlight some algorithmic and instrumental issues that are still poorly understood.

【 授权许可】

Unknown