Influence of snow making on albedo and local radiative forcing in an alpine area

摘要: Abstract In the present paper, climate cooling potential of technical snow making on ski slopes is investigated with regard to radiative forcing. It well-known, that shows a higher degree reflection compared other ground surfaces. During snow-poor winters, guaranteeing covered by using may therefore lead an increase in albedo mountainous region. Since increasing engenders negative forcing, production particular relevance context current debate. Investigations were however generally performed for flat Several studies nevertheless demonstrated topography leads substantial decrease mean given This attributable shading effects and slope inclinations. The study was dedicated accurate simulation impact resulting change shortwave budget chosen We used state art 3-dimensional transfer model. investigations carried out skiing area Saalbach-Hinterglemm Austria. Broadband values between 0.61 0.62 cloudless conditions 0.64 0.65 cloudy solar zenith angle (sza) 30 80 degrees simulations. An uncertainty ±0.17 taken into account. First sensitivity performed, showed as function inclination. A strong surrounding trees up 40% 14% respectively found at high sza under clear sky conditions. Compared free 0.18 0.36 observed, smaller assuming no surroundings. Only related forcing −7 −35 W/m2 obtained. If long-term cover account, albedo, only, March April. just below 0.10 April 0.02 March, around −12 W/m2 −1.5 W/m2 respectively. Though, order analyze eventual effect whole carbon footprint shall be determined.