UV albedo of arctic snow in spring
نویسندگان
چکیده
UV albedo of arctic snow in spring O. Meinander, A. Kontu, K. Lakkala, A. Heikkilä, L. Ylianttila, and M. Toikka Finnish Meteorological Institute, P.O. BOX 503, 00101 Helsinki, Finland Radiation and Nuclear Safety Authority, P.O. Box 14, 00881, Helsinki, Finland Toikka Engineering Ltd., Hannuntie 18, 02360 Espoo, Finland Received: 3 January 2008 – Accepted: 9 January 2008 – Published: 29 February 2008 Correspondence to: O. Meinander ([email protected]) Published by Copernicus Publications on behalf of the European Geosciences Union.
منابع مشابه
Diurnal variations in the UV albedo of arctic snow
The relevance of snow for climate studies is based on its physical properties, such as high surface reflectivity. Surface ultraviolet (UV) albedo is an essential parameter for various applications based on radiative transfer modeling. Here, new continuous measurements of the local UV albedo of natural Arctic snow were made at Sodankylä (6722N, 2639E, 179 m a.s.l.) during the spring of 2007. The...
متن کاملArctic and Antarctic diurnal and seasonal variations of snow albedo from multiyear Baseline Surface Radiation Network measurements
[1] This study analyzes diurnal and seasonal variations of snow albedo at four Baseline Surface Radiation Network stations in the Arctic and Antarctica from 2003 to 2008 to elucidate similarities and differences in snow albedo diurnal cycles across geographic zones and to assess how diurnal changes in snow albedo affect the surface energy budget. At the seasonal scale, the daily albedo for the ...
متن کاملSpectral albedo of seasonal snow during intensive melt period at Sodankylä, beyond the Arctic Circle
We have measured spectral albedo, as well as ancillary parameters, of seasonal European Arctic snow at Sodankylä, Finland (6722 N, 2639 E). The springtime intensive melt period was observed during the Snow Reflectance Transition Experiment (SNORTEX) in April 2009. The upwelling and downwelling spectral irradiance, measured at 290–550 nm with a double monochromator spectroradiometer, revealed al...
متن کاملThe biogeography of red snow microbiomes and their role in melting arctic glaciers
The Arctic is melting at an unprecedented rate and key drivers are changes in snow and ice albedo. Here we show that red snow, a common algal habitat blooming after the onset of melting, plays a crucial role in decreasing albedo. Our data reveal that red pigmented snow algae are cosmopolitan as well as independent of location-specific geochemical and mineralogical factors. The patterns for snow...
متن کاملArctic reindeer extend their visual range into the ultraviolet.
The Arctic has extreme seasonal changes in light levels and is proportionally UV-rich because of scattering of the shorter wavelengths and their reflection from snow and ice. Here we show that the cornea and lens in Arctic reindeer do not block all UV and that the retina responds electrophysiologically to these wavelengths. Both rod and cone photoreceptors respond to UV at low-intensity stimula...
متن کامل