Composite Maps (North America and Asia)
Northern Hemisphere Anticyclone Climatology
NCEP-NCAR Global Reanalysis (1948-2007)
ERA-40 Global Reanalysis (1958-2001)
Comparison plots
1040 hPa (1958-2001) NCEP/NCAR ERA-40
1050 hPa (1958-2001) NCEP/NCAR ERA-40
1060 hPa (1958-2001) NCEP/NCAR ERA-40
By Decade
1040 hPa
NCEP/NCAR 1948-1957 1958-1967 1968-1977 1978-1987 1988-1997 1998-2007
ERA-40 1958-1967 1968-1977 1978-1987 1988-1997
Histograms of maximum count by year
NCEP/NCAR: 1040 hPa 1050 hPa (Coming soon!)
Link to MSLP plots from 1973 using ERA-40 (0000 UTC only)*
*This was used as a reference to confirm the maximum counts (values used for histograms) obtained for certain years in previous research were incorrect.
Last updated: 31 July 2008
