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Facilitating Access to Global Observing Systems Data and Information

Global Surface Network (GSN)

Data Access

Data availability: Near Real Time data are available at the GCOS Surface Network Monitoring Centre (GSNMC) products. Historical GCOS Surface Network (GSN) data are available online from the National Climatic Data Center (NCDC) in Asheville, North Carolina. NCDC also maintains supporting metadata submitted by WMO Members. Annual and Monthly Global Average Surface Temperature Anomalies are available at the Japan Meteorological Agency. For data access see links below.

GSN Program Overview

Updated September 23, 2009

Access Near Real Time Data

GCOS Surface Network Monitoring Centre (GSNMC) at the Deutcher Wetterdienst (DWD)

    Monthly averages/totals of certain surface meteorological variables at the GSN stations are reported via the GTS shortly after the end of the month.

    The GSNMC data set is available online at the Deutcher Wetterdienst (DWD). The final GSNMC data set is sent on a monthly basis to the NOAA/National Climatic Data Center (NCDC) in Asheville, NC, USA, after the QC of the CLIMAT temperature and precipitation data has been completed (in general about 2 months after the end of the observation month). This data set is available at NOAA/NCDC through a user interface (GSN-Monthly). In order to offer earlier access to the GSN data, a so called "quick" GSN data set is provided as soon as it becomes available (about day 23 of the following month). This data set is marked by a 'Q' and does NOT include any information about data quality.

    Data sets and products available at the GSNMC:

  • Access GSNMC Monthly data (Final and Quick data)
  • Format description of the GSNMC data set files
  • Monthly monitoring products
  • Annual monitoring reports
  • Changes in the GSN
  • Monitoring Methods

Japan Meteorological Agency

Global Average Surface Temperature Anomalies are available at the Japan Meteorological Agency web site:

Access Historical Data

NOAA National Climatic Data Center (NCDC)

In addition to the monthly data derived from the CLIMAT messages and forwarded by the monitoring centers, NCDC also acquires historical monthly and daily observations for the GSN stations. Parameters available typically include minimum, maximum, and mean temperatures, station and sea level pressures, winds, and precipitation.

Access NCDC data through a Data Access Matrix:

Access NCDC data through individual Datasets:

Access GSN Overlap Data Archive on the GOSIC Portal:

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