![]() Tables of Global and Hemispheric Monthly Means and Zonal Annual Means Combined Land-Surface Air and Sea-Surface Water Temperature Anomalies The programs assume a Unix-like operating system and require familiarity with Python for installation and use. Programs used in the GISTEMP analysis and documentation on their use are AIR DOC NASA UPDATEThe update incorporates reportsįor the previous month as well as late reports and corrections for earlier months. Middle of every month using the latest GHCN and ERSST data. The GISTEMP analysis is updated regularly. We also maintain a running record of modifications made to the analysis on our Several papers describing updates to the analysis followed over the following decades,Īs well as the uncertainty quantification ofįor further details, please see the GISTEMP The analysis method was fully documented in Of estimating global temperature change was needed for comparison with one-dimensional global climate The basic GISS temperature analysis scheme was defined in the late 1970s by James Hansen when a method Zyss, 2019: Improvements in the GISTEMP uncertainty model. NASA Goddard Institute for Space Studies. GISS Surface Temperature Analysis (GISTEMP), version 4. In citing the webpage, be sure to include the date of access. Please cite both this webpage and also our most recent When referencing the GISTEMP v4 data provided here, AIR DOC NASA CODEat the Clear Climate Code project for their contributions. Past members on the GISTEMP team have included The GISTEMP analysis was initiated by Dr. Other researchers currently participating in the GISTEMP analysis include If the FAQ does not answer your question, Updates to Analysis page for detailed update information about GISTEMP v4.īefore contacting us, please check if your question about the GISTEMP analysis is already answered in GISTEMP News page for a list of announcements and NASA articles related to the GISTEMP analysis.Īnnouncements when our monthly updates are released are posted to the NASA/GISS Twitter feed. That page discusses why the GISTEMP analysis investigates temperature anomalies (deviations from the normal temperature for a given location and time of year) rather than absolute temperatures. The Elusive Absolute Temperature webpage has been completely overhauled. We'd like to thank Ivo Welch for bringing this to our attention. Links to the Clear Climate Code Project's first implementation of GISTEMP in pure Python have been updated to point to their Github repo. Our displays of AIRS v7 data are now based on the reprocessed data. The gridded anomaly data are now also available in Zarr format below.ĭue to a calibration maneuver in late 2021, the AIRS team had to adapt their algorithm and reprocess the AIRS v7 data starting with September 2021. This will make it easier to spot potential outliers, the main reason for providing that option. The 250km smoothing option of the maps utility no longer interpolates the gridded data. These updated files incorporate reports for the previous month and also late reports V4 (meteorological stations) and ERSST v5 (ocean areas), combined as Graphs and tables are updated around the middle of every month using current data files from NOAA GHCN 4 (GISTEMP v4) is an estimate of global surface temperature change. The GISS Surface Temperature Analysis ver. GISS Surface Temperature Analysis (GISTEMP v4) ![]()
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