DNMI.t2m {clim.pact} | R Documentation

## Gridded monthly mean climate data

### Description

Gridded monthly mean 2-meter temperature [T(2m)], sea level pressure (SLP), and sea surface temperature (SST) analysis for the North Atlantic region covering the period 1873 – 1998. The actual data is filtered though 20 EOFs (see `EOF2field`), and stored as eof products in order to save space. The lines listed in the example shows how these data have been generated (NB. old objects with the name 'eof' may be overwritten).

### Usage

    data(DNMI.t2m)
           data(DNMI.slp)
           data(DNMI.sst)

### Format

The data is a 'field' object (see `retrieve.nc`).

### Source

The data is also avaialble from http://noserc.met.no.

### References

Benestad, R.E. and Melsom, A. (2002) Is there a link between the unusually wet autumns autumns in southeastern Norway and SST anomalies?, Climate Research Vol 23, 67-79. \ Melsom E. and Benestad, R.E. : Is there a link between the unusually wet autumns in southeastern Norway and SST anomalies? PDF-version available on-line from http://www.dams.dk/nmm2002/Melsom%20and%20Benestad.pdf \ Benestad, R.E.: Analysis of gridded sea level pressure and 2-meter temperature for 1873-1998 based on UEA and NCEP re-analysis II (RegClim), DNMI KLIMA Report 03/00 PDF-version available on-line from http://noserc.met.no/DS/klima0300.html. For SST, see http://noserc.met.no/DS/dnmisst.html. The analysis of the SST was the same as the T(2m) and SLP.

### Examples

    ## Not run:
    library(clim.pact)
    t2m <- retrieve.nc("~/data/analysis/DNMI_t2m.nc")
    eof <- EOF(t2m)
    save(file="clim.pact/data/eof_DNMI_t2m.Rdata",eof)
    t2m.eof <- EOF2field(eof)

    # Check if the EOF reconstruction reproduces the original field:
    newFig()
    plotField(t2m,lat=60,lon=10)
    plotField(t2m.eof,lat=60,lon=10,add=TRUE,lty=2,col="red")  # Very similar time series

    newFig()
    mapField(t2m.eof)
    mapField(t2m,add=TRUE,col="red",lty=2,lwd=1)  # Very similar spatial pattern/contours

    sst <- retrieve.nc("~/data/analysis/DNMI_sst.nc")
    eof <- EOF(sst)
    save(file="clim.pact/data/eof_DNMI_sst.Rdata",eof)

    slp <- retrieve.nc("~/data/analysis/DNMI_slp.nc")
    eof <- EOF(slp)
    save(file="clim.pact/data/eof_DNMI_slp.Rdata",eof)
    ## End(Not run)

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