Climatology and Changes of Extratropical Cyclone Activity: Comparison of ERA-40 with NCEP-NCAR Reanalysis for 1958-2001 From: Journal of Climate | Date: July 1, 2006| Author: Wang, Xiaolan L; Swail, Val R; Zwiers, Francis W | Copyright American Meteorological Society Jul 1, 2006. Provided by ProQuest LLC.Copyright information

ABSTRACT

In this study, a cyclone detection/tracking algorithm was used to identify cyclones from two gridded 6-hourly mean sea level pressure datasets: the 40-yr ECMWF Re-Analysis (ERA-40) and the NCEP-NCAR reanalysis (NNR) for 1958-2001. The cyclone activity climatology and changes inferred from the two reanalyses are intercompared. The cyclone climatologies and trends are found to be in reasonably good agreement with each other over northern Europe and eastern North America, while E...

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