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`, `xxx`, `climxxx`, and `i` 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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