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Trends in Northern Hemisphere Surface Cyclone Frequency and Intensity
Ist Teil von
Journal of climate, 2001-06, Vol.14 (12), p.2763-2768
Ort / Verlag
Boston, MA: American Meteorological Society
Erscheinungsjahr
2001
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
One of the hypothesized effects of global warming from increasing concentrations of greenhouse gases is a change in the frequency and/or intensity of extratropical cyclones. In this study, winter frequencies and intensities of extratropical cyclones in the Northern Hemisphere for the period 1959–97 are examined to determine if identifiable trends are occurring. Results indicate a statistically significant decrease in midlatitude cyclone frequency and a significant increase in high-latitude cyclone frequency. In addition, storm intensity has increased in both the high and midlatitudes. The changes in storm frequency correlate with changes in winter Northern Hemisphere temperature and support hypotheses that global warming may result in a northward shift of storm tracks in the Northern Hemisphere.