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NOAA Paleoclimatology Reconstructions Network -

Merged Land-Ocean Surface Temperature Analysis(MLOST v3b)

The instrumental data section of the PCN includes the MLOST combined global land and ocean gridded (5°x5°) surface temperature data sets at annual and seasonal time resolution. MLOST extends from 1880-2010 and is derived from two independent analyses, an extended reconstructed sea surface temperature (ERSSTv3b) analysis and a land surface temperature (LST) analysis using the global historical climatology network (GHCN) temperature database. The ERSST analysis on a 2 deg grid is degraded to a 5 deg resolution to match the LST analysis. The current v3b ERSST analysis used for this product uses no satellite SST data, so the merged product is now also referred to as MLOST v3b. The MLOST anomalies are computed relative to a 1971-2000 baseline. These data sets could be used for calibration and validation of regional and large-scale last 2+ millennium temperature reconstructions, once annualized or seasonalized from their native monthly time step.

Download PCN INSTRUMENTAL- MLOST v3b data from the NOAA/WDC Paleo archive:
NOAA Paleoclimatology created annual and seasonal averages of the MLOST gridded monthly instrumental temperature data for 1880-2010 for the Paleoclimate Network. These averaged data are available here in Text, Excel, and netCDF format. Click here for the PCN Data Description and Format

Gridded annually averaged data:
MLOST v3b gridded annual anomaly data- TextExcel or netCDF
A sample script to open the netCDF MLOST files in the R programming environment is also provided.

Seasonal averages of the data are also available. In parallel to the PCN Reconstruction data, there are two seasonal splits available for the MLOST data. One set splits the seasons based on the calendar year. This set contains January-March (winter), April-June (spring), July-September (summer) and October-December (fall) periods. The other set contains the traditional meteorological seasonal splits starting with the December of the previous year. The meteorological seasons set contains December-February (winter), March-May (spring), June-August (summer) and September-November (fall) periods.
[For a given grid cell, seasonal averages were computed when at least 2 out of 3 months data values. For annual averages all 12 months were required to compute an average.]

Seasonal averages:
MLOST v3b Calendar Winter (JFM), Text, Excel or netCDF
MLOST v3b Meteorological Winter (DJF), Text, Excel or netCDF
MLOST v3b Calendar Spring (AMJ), Text, Excel or netCDF
MLOST v3b Meteorological Spring (MAM), Text, Excel or netCDF
MLOST v3b Calendar Summer (JAS), Text, Excel or netCDF
MLOST v3b Meteorological Summer (JJA), Text, Excel or netCDF
MLOST v3b Calendar Fall (OND), Text, Excel or netCDF
MLOST v3b Meteorological Fall (SON), Text, Excel or netCDF

Citation for Data Source:
Smith, T.M., R.W. Reynolds, T.C. Peterson, and J. Lawrimore. 2008.
Improvements to NOAA's historical merged land-o cean surface temperature analysis (1880-2006). J. Climate, 21, 2283-2296. doi:10.1175/2007JCLI2100.1
Original Data available at NCDC's MLOST page.
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Last Updated Thursday, 19-Jan-2012 07:56:08 EST by
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