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Temperatur och nederbörd i Sverige 1860 -2001
SMHI.
2002 (svensk)Rapport (Annet vitenskapelig)
Abstract [en]

Swedish temperature and precipitation series from 1860-2001 are analysed  in this report. Sweden  is divided into four regions. These are defined according to the drainage basins: Gulf of Bothnia (Bv), Bothnian Sea (Bh), Proper Baltic Sea (EÖ) and Kattegatt and Skagerrak (Vh). Annual series of  temperature and precipitation as well as series for the traditional  seasons  winter (December  previous year, January, February), spring (March, April, May), summer (June, July, August) and autumn (Sep­ tember, October, November) are presented. All series have been homgenised and all missing values for incomplete series have been filled out by    interpolation.

 

Generally the analyses show that Sweden has become warmer  and wetter  in this centennial  perspective.  As a rule changes and trends are larger in the two northerly regions (Bv and Bh). The increase of annual temperature amounts to 0.9° (Bv), 0.8° (Bh), 0.5° (EÖ) and 0.5° (Vh) when data from the colder period 1860-1925 is compared with the warmer period 1926-2001. Annual precipitation <luring the drier period 1860-1920  is compared  with the wetter  period  1921-2001. The  relative changes  are 23% (Bv), 15% (Bh), 7% (EÖ) and 7% (Vh). Spring temperature  and winter precipitation  show especially !arge    mcreases.

 

Comparisons with runoff data indicate that evapotranspiration has become much larger. It is argued that the substantial increase of forest biomass could be one explanation and higher temperatures could be another. The increase of forest biomass leads to larger interception and then larger evaporation and as a rule also larger transpiration. The warming in spring and autumn leads to a longer active season for the vegetation.

sted, utgiver, år, opplag, sider
2002. , s. 28
Serie
Meteorologi, ISSN 0283-7730 ; 104
HSV kategori
Forskningsprogram
Meteorologi
Identifikatorer
URN: urn:nbn:se:smhi:diva-3915OAI: oai:DiVA.org:smhi-3915DiVA, id: diva2:1068421
Tilgjengelig fra: 2017-01-25 Laget: 2017-01-25 Sist oppdatert: 2017-01-25bibliografisk kontrollert

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