Chart showing changes in global average surface temperature annually during the month of October
Uploader's note: Tentatively, uploader envisions this chart as being specific to the time period ending in 2023, designed for use mainly in articles about 2023 in particular. Please don't update this chart with future years' data, at least without discussion. You can upload a separate file for your other purposes.
Source data: Copernicus: October 2023 - Exceptional temperature anomalies; 2023 virtually certain to be warmest year on record. climate.Copernicus.eu. The Copernicus Programme (8 November 2023). Archived from the original on 8 November 2023. "Globally averaged surface air temperature anomalies relative to 1991–2020 for each October from 1940 to 2023. Data Source: ERA5. Credit: C3S/ECMWF."(downloaded data file should be: era5_monthly_series_anomaly_all_2t_global_1940-2023.csv )For graphical simplicity, uploader changed the "floor" from which the bars extend upward to be from "-1.0" rather than upward and downward from "0.0". Data itself has not been changed.
Technical note: most SVG code was automatically generated by the "Vertical bar charts" spreadsheet linked at User:RCraig09/Excel to XML for SVG. Minor additions and adjustments were made in a text editor.

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Own work
RCraig09