Lêer:Common Era Temperature.svg

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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).
Datum
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Outeur Efbrazil
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Work is derived from [Temperature reconstruction last two millennia.svg] by Femke Nijsse

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  1. 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.

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Global temperature reconstruction of the last two millennia with instrumental temperature from 1880 to 2020

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(nuutste | oudste) Wys (nuwer 10 | ) (10 | 20 | 50 | 100 | 250 | 500).
Datum/TydDuimnaelDimensiesGebruikerOpmerking
huidig03:31, 20 Maart 2024Duimnaelskets vir weergawe vanaf 03:31, 20 Maart 2024960 × 720 (118 KG)이강철 (WMKR)File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ko.
09:41, 21 Augustus 2022Duimnaelskets vir weergawe vanaf 09:41, 21 Augustus 2022960 × 720 (116 KG)TAKAHASHI ShuujiFile uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ja.
13:01, 17 Januarie 2021Duimnaelskets vir weergawe vanaf 13:01, 17 Januarie 2021960 × 720 (114 KG)EfbrazilUpdated with 2020 data
21:36, 21 Augustus 2020Duimnaelskets vir weergawe vanaf 21:36, 21 Augustus 2020960 × 720 (114 KG)EfbrazilFixed background to fill image
19:27, 31 Julie 2020Duimnaelskets vir weergawe vanaf 19:27, 31 Julie 2020960 × 720 (114 KG)EfbrazilAdded fahrenheit to far side of graph for easier consumption by US audiences
15:54, 13 Mei 2020Duimnaelskets vir weergawe vanaf 15:54, 13 Mei 2020960 × 701 (111 KG)NyqDecapitalized common noun
17:56, 2 April 2020Duimnaelskets vir weergawe vanaf 17:56, 2 April 2020960 × 701 (111 KG)EfbrazilAll data is now a 5 year moving average (indirect measurement was a 30 year average)
00:11, 2 April 2020Duimnaelskets vir weergawe vanaf 00:11, 2 April 2020960 × 701 (110 KG)Efbrazilfixing year 0 offset bug
23:40, 30 Maart 2020Duimnaelskets vir weergawe vanaf 23:40, 30 Maart 2020960 × 701 (110 KG)EfbrazilRebuilt 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 Februarie 2020Duimnaelskets vir weergawe vanaf 19:55, 25 Februarie 2020960 × 701 (304 KG)EfbrazilSubtle tweaks
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