Physics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3702803m&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 2, CiteID L02803
Physics
1
Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Global Change: Global Climate Models (3337, 4928), Global Change: Climate Dynamics (0429, 3309)
Scientific paper
Future changes in the frequency of Australia-New Zealand (AU; winter and summer) and Andes (AN; winter) blockings are investigated via present-day (1979-2003) and future (2075-2099) simulations using 20-, 60-, and 180-km-mesh atmospheric general circulation models (AGCMs) under the IPCC SRES A1B emission scenario. The present-day climate simulations reveal that the AGCM with the highest horizontal resolution is required to accurately simulate AU and AN blockings in both winter and summer. The future climate simulation predicts a significant decrease in AU blocking frequency in both summer and winter, mainly on the west side of the peak in present-day blocking frequency, where the westerly jet is predicted to increase in strength. The decrease in the AU blocking frequency during winter is more remarkable than that during summer. The number of long-lived AU blocking events is predicted to decrease with the possibility that events ≥13 days will disappear altogether. In contrast, no significant changes are predicted in AN blocking frequency and duration.
Endo Hirokazu
Matsueda Mio
Mizuta Ryo
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