作者: J. B. Ørbæk , T. Svenøe , D. O. Hessen
DOI: 10.1007/978-3-642-56075-0_3
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摘要: Arctic biota has during the evolutionary process adapted to an extreme geophysical environment with low temperatures, extensive snow cover and a large annual variation in solar radiation. During recent years, it become evident that climatic stratospheric changes impose new challenges for ecosystems expected major increased variability of parameters, as well significant increases biologically damaging UV radiation, especially (IPCC 2000). Since Antarctic ozone hole was discovered (Farman et al. 1985), depletion events have been detected within polar vortex years (Rex 1997). As consequence, surface radiation also (Madronich 1994, 1998).