Storms.ERA40 {cyclones}R Documentation

North Atlantic cyclone statistics.

Description

Counts of low-pressure systems every 12hr over the North Atlantic region (00.00 and 12.00 UTC), derived from the NMC (now National Centers for Environmental Prediction, NCEP, http://www.ncep.noaa.gov/) or ECMWF re-analysis ERA40 6-hr or 24-hr slp fields ('x1' is once a day).

Usage

data(Storms.ERA40)
       data(Storms.ERA40x1)
       data(Storms.NMC) 

Format

'Storms.ERA40' - a list of lon (longitude in degrees), lat (latitude in degrees), psl (central sea level pressure in hPa), yy (year), mm (month), dd (day), max.dpsl (max pressure gradient), tim (time index), max.speed (estimated maximum geostropic speed), radius (radius of low pressure system in km), rad.max.dpsl, dx, dy, version, scale.factor.x, scale.factor.y. 'storms' - a list of lon, lat, psl, yy, mm, dd. See CCI.

Source

The Norwegian Meteorological Institute, Climatology division.

References

EMS04-A-00146, Benestad, R.E.; Sorteberg, A.; Chen, D. 'Storm statistics derived using a calculus-based cyclone identification method', http://www.cosis.net/members/meetings/sessions/oral_programme.php?p_id=110&s_id=1845, European Meteorological Society AC2, Nice, Sept 28, 2004.


[Package cyclones version 1.2-0 Index]