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1 June 2004 Spatial Analysis of Extreme Precipitation in Sweden 1961–2000
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Abstract
Extreme daily precipitation in Sweden for the years 1961–2000 is analyzed with respect to spatial scale, regional variations and associated weather types. Correlograms based on a lag distance of 30 km estimated the spatial scale of variation of the annual mean precipitation, the 99th percentile of daily precipitation and the average of annual maximum daily precipitation to 100 km, 60–100 km and 40–70 km, respectively. Regions of correlation with respect to precipitation at 82 stations during days of extreme events are identified through Maximum-Likelihood Factor Analysis. Eleven factors are found to provide the optimum factor solution. Weather types for the days of extreme events are determined by an objective classification scheme, based on daily sea level pressure, which is modified by subjective inclusion of fronts. In total, 63% of the extreme events occurred during cyclonic weather types, 32% during frontal, 3% during directional and 2% during anticyclonic types. The frequency of the weather types during extreme events varied between the regions however.
Cecilia Hellström and Björn A. Malmgren "Spatial Analysis of Extreme Precipitation in Sweden 1961–2000," AMBIO: A Journal of the Human Environment 33(4), (1 June 2004). https://doi.org/10.1579/0044-7447-33.4.187
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