Can climate trends explain the damage in central Swedish lowland forests?
1991
Joensson, P. (Lund Univ. (Sweden). Naturgeografiska Inst.)
In recent years forest damage has increased in Sweden because of air pollution, possibly in combination with climatic effects. In this study, the climatic influence on forestry was investigated using linear regression analysis. The study included lowland terrain in central Sweden during 1948-1987. Data were collected from Stockholm, Observatoriekullen (temperature and precipitation) and the coastal stations Landsort, Svenska Hoegarna, and Soederarm (storm frequency). Very weak, though statistically insignificant, trends of increased storm frequency and number of frost-change days annually and during April-May were found. Precipitation, however, both over the year and during summer, showed no trends at all. Trends in isolated climate variables do not fully explain the relationship between climate and forest vigour. Infrequent "catastrophic" situations, often with several factors co-operating, are also of importance.
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