GHCN_CAMS Gridded 2m Temperature (Land)

Brief Description:

• GHCN CAMS is a high resolution (0.5x0.5) analyzed global land surface temperatures from 1948 to near present.

Temporal Coverage: Monthly means from 1948 to Aug 2021 . Long term monthly means using 1981-2010. Spatial Coverage: 0.5 degree latitude x 0.5 degree longitude global grid (360x720). 89.75S - 89.75N, 0.25E - 359.75E.

Levels:

• Surface

Update Schedule:

• Monthly

Download/Plot Data: (FTP Access)

(variable).(time).(statistic).nc

Variable	Statistic	Level	Download File	Create Plot/Subset
Temperature	Mean	Surface	air.mon.mean.nc
Temperature	Long Term Mean	Surface	air.mon.1981-2010.ltm.nc

Usage Restrictions:

• None.

Detailed Description:

• See the NCDC's GHCN_CAMS ftp page. According to the journal article on the dataset: A global monthly land surface temperature analysis for 1948-present.
  "This data set is different from some existing surface airtemperature data sets in: (1) using a combination of two large individual data sets of station observations collected from the Global Historical Climatology Network version 2 and the Climate Anomaly Monitoring System (GHCN + CAMS), so it can be regularly updated in near real time with plenty of stations and (2) some unique interpolation methods, such as the anomaly interpolation approach with spatially-temporally varying temperature lapse rates derived from the observation-based Reanalysis for topographic adjustment.".
  
  Also see the webpage http://www.cpc.ncep.noaa.gov/cgi-bin/gl_Temperature-Monthly.sh for plots (total, monthly, percentile) and links to related datasets.
• Related Datasets at PSL
  • U Delaware (air temperature).

Caveats:

• None.

Related File Naming & Structure Information:

File Names: (get via ftp at ftp.cdc.noaa.gov)

• air.mon.mean.nc   (In directory: /Datasets/ghcncams/)
• air.mon.1981-2010.ltm.nc   (In directory: /Datasets/ghcncams/Derived)

Dataset Format and Size:

• PSL standard NetCDF: ~403 Mbyte file size.
• PSL standard NetCDF: 187 Mbyte file size LTM.

Missing Data:

• -9.96921e+36f

Citation:

• Please note: If you acquire GHCN Gridded V2 data products from PSL, we ask that you acknowledge us in your use of the data. This may be done by including text such as GHCN Gridded V2 data provided by the NOAA/OAR/ESRL PSL, Boulder, Colorado, USA, from their Web site at / in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSL to justify keeping the GHCN Gridded V2 data set freely available online in the future. Thank you!
• Fan, Y., and H. van den Dool (2008), A global monthly land surface air temperature analysis for 1948-present, J. Geophys. Res., 113, D01103, doi:10.1029/2007JD008470.

References:

• Fan, Y., and H. van den Dool (2008), A global monthly land surface air temperature analysis for 1948-present, J. Geophys. Res., 113, D01103, doi:10.1029/2007JD008470.

FGDC metadata:

• http://www.ncddc.noaa.gov/approved_recs/cpc_xml/GHCN_CAMS_MLY.xml

Original Source:

• NOAA/NCEP CPC Webpage: http://www.cpc.ncep.noaa.gov/cgi-bin/gl_Temperature-Monthly.sh for plots, links to related data.
• NOAA/NCEP CPC: ftp://ftp.cpc.ncep.noaa.gov/wd51yf/GHCN_CAMS/ (grib).

Contact:

• Physical Sciences Laboratory: Data Management
  NOAA/ESRL/PSL
  325 Broadway
  Boulder, CO 80305-3328
  psl.data@noaa.gov