File:Common Era Temperature.svg
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Summary
| Description |
English: Temperatures with respect to the 1850-1900 mean as per IPCC definition of pre-industrial temperatures over the last 2 millennia and observational values ranging from 1880 to 2020. All data is smoothed using a 5 year moving average.
The 2000 year record is computed in https://www.nature.com/articles/s41561-019-0400-0 using a wide set of proxies that have been vetted by the Pages2k Consortium [1]. They include tree ring data, data from corals and ice core data. A direct link to data is at https://figshare.com/articles/Reconstruction_ensemble_median_and_95_range/8143094 The observational data set is pulled from NASA: https://climate.nasa.gov/vital-signs/global-temperature/ NASA data is adjusted up by 0.188 degrees C since the IPCC says 2006 to 2015 is 0.87 degrees warmer than 1850 to 1900 and NASA averages 0.682 in that time frame. The 2000 year temperature is adjusted up by 0.287667, which is the NASA adjustment from above plus 0.099667 for the NASA average from 1961 to 1990 (the baseline for the 2000 year data set). |
| Date | |
| Source | Own work |
| Author | Efbrazil |
| Other versions |
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| SVG development | The SVG code is valid. This vector image was created with an unknown SVG tool. This file uses embedded text that can be easily translated using a text editor. |
Work is derived from [Temperature reconstruction last two millennia.svg] by Femke Nijsse
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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- ↑ Pages2k Consortium (2017). "A global multiproxy database for temperature reconstructions of the Common Era". Scientific Data 4: 170088. DOI:10.1038/sdata.2017.88. ISSN 2052-4463.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:31, 20 March 2024 | 960 × 720 (118 KB) | 이강철 (WMKR) | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ko. | |
| 09:41, 21 August 2022 | 960 × 720 (116 KB) | TAKAHASHI Shuuji | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ja. | ||
| 13:01, 17 January 2021 | 960 × 720 (114 KB) | Efbrazil | Updated with 2020 data | ||
| 21:36, 21 August 2020 | 960 × 720 (114 KB) | Efbrazil | Fixed background to fill image | ||
| 19:27, 31 July 2020 | 960 × 720 (114 KB) | Efbrazil | Added fahrenheit to far side of graph for easier consumption by US audiences | ||
| 15:54, 13 May 2020 | 960 × 701 (111 KB) | Nyq | Decapitalized common noun | ||
| 17:56, 2 April 2020 | 960 × 701 (111 KB) | Efbrazil | All data is now a 5 year moving average (indirect measurement was a 30 year average) | ||
| 00:11, 2 April 2020 | 960 × 701 (110 KB) | Efbrazil | fixing year 0 offset bug | ||
| 23:40, 30 March 2020 | 960 × 701 (110 KB) | Efbrazil | Rebuilt from the bottom up to eliminate the confidence intervals. Also re-baselined as per the description in the text- that the 2000 year temperatures are relative to the 1961 to 1990 average, which means adjusting them up by 0.288 C so they match the IPCC definition of the 1850 to 1900 average (the common baseline used on all climate change temp graphs). Previous baseline was about 0.1 degrees different because I used the 1860 to 1890 average from the data itself. | ||
| 19:55, 25 February 2020 | 960 × 701 (304 KB) | Efbrazil | Subtle tweaks |
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