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NOAA Merged Land Ocean Global Surface Temperature Analysis (NOAAGlobalTemp) V5

The NOAA Merged Land Ocean Global Surface Temperature Analysis Dataset (NOAAGlobalTemp) merges two dataset to form one land–ocean surface temperature analysis (formerly known as MLOST).NOAAGlobalTEmp consists of a spatially gridded (5° × 5°) global surface temperature dataset, with monthly resolution from January 1880 to present. We combine a global sea surface (water) temperature (SST) dataset with a global land surface air temperature dataset into this merged dataset of both the Earth’s land and ocean surface temperatures, currently as version v5. The Extended Reconstructed Sea Surface Temperature (ERSST) version 5 provides the foundational SST observations. The land surface air temperature observations come from the Global Historical Climatology Network Monthly (GHCN-Monthly) database, version 4.

A review paper, "The NOAA Global Surface Temperature Dataset Version 5: Employing Improved Data Coverage and Historical Homogenization" is published in AGU Eos (Zhang, et al, 2019).

We provide the NOAAGlobalTemp dataset as temperature anomalies, relative to a 1971–2000 monthly climatology, following the World Meteorological Organization convention. 

Maps of Obersvation distributions in NOAAGlobal Temp v4 on left and v5 on right

Data Access

Global Gridded 5° × 5° Data 
Monthly data are in netCDF format, from which data can also be downloaded in ASCII format from this TDS Server.

ASCII Time Series
Monthly and annual land–ocean temperature time series are available from 1880 to present for several zonal bands

Climate at a Glance
This interactive tool provides global charts and graphics using NOAAGlobalTemp data.


Smith, T.M., R.W. Reynolds, T.C. Peterson, and J. Lawrimore, 2008: Improvements to NOAA's historical merged land–ocean surface temperatures analysis (1880–2006); Journal of Climate, 21, 2283–2296, doi:10.1175/2007JCLI2100.1.

Zhang, Huai-Min, Jay H. Lawrimore, Boyin Huang, Matthew J. Menne, Xungang Yin, Ahira Sánchez-Lugo, Byron E. Gleason, Russell Vose, Derek Arndt, J. Jared Rennie, Claude N. Williams, 2019:  Updated temperature data give a sharper view of climate trends, Eos, 100, Published on 19 July 2019.

Cite dataset when used as a source. See the dataset's DOI landing page for citation details at doi:10.7289/V5FN144H.

Contact Information

Huai-Min Zhang

Boyin Huang

Jay Lawrimore