Sea Ice Loss and Arctic Cyclone Activity from 1979 to 2014
Tóm tắt
Extensive summer sea ice loss has occurred within the Beaufort, Chukchi, East Siberian, and Laptev Seas over the last decade. Associated anomalies in sensible and latent heat fluxes in autumn have increased Arctic atmospheric precipitable water and air temperatures, with the potential to impact autumn and winter cyclone activity. To examine if a connection exists between recent Arctic sea ice loss and cyclone activity, several cyclone metrics from 60° to 90°N are analyzed. Results show that following years with less September sea ice, there is a subsequent increase in moisture availability, regional baroclinicity, and changes in vertical stability that favor cyclogenesis. However, tracking of individual cyclones indicates no coherent increase in cyclone frequency or intensity associated with sea ice loss. Furthermore, no robust northward progression of extreme cyclones is observed.
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Tài liệu tham khảo
Noer, G., and M. Ovhed, 2003: Forecasting of polar lows in the Norwegian and the Barents Sea. Proc. Ninth Meeting of the EGS Polar Lows Working Group, Cambridge, United Kingdom, European Geophysical Society. [Available online at https://web.archive.org/web/20051122020825/https://www2.meteo.uni-bonn.de/mitarbeiter/GHeinemann/eplwg/newl03/noer/wplwg-2003-forecasting_polar_lows.html.]
Rasmussen, E., and J. Turner, 2003: Polar Lows: Mesoscale Weather Systems in the Polar Regions. Cambridge University Press, 612 pp.
Rogers, R. R., 1978: Short Course in Cloud Physics. 3rd ed. Butterworth-Heinemann, 304 pp.
Serreze, M. C., and R. G. Barry, 2014: The Arctic Climate System. 2nd ed. Cambridge University Press, 404 pp., doi:10.1017/CBO9781139583817.
Serreze M. C., 2015, Philos. Trans. Roy. Soc. London, 373
Wallace, J. M., and P. V. Hobbs, 2006: Atmospheric Science: An Introductory Survey. 2nd ed. Vol. 92, International Geophysics Series, Academic Press, 504 pp.