File:Rekonstrukcja Temperatury.PNG
Rekonstrukcja_Temperatury.PNG (600 × 443 pixels, file size: 35 KB, MIME type: image/png)
Captions
Captions
Summary
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  This image is a comparison of 10 different published reconstructions of mean temperature changes during the last 2000 years. More recent reconstructions are plotted towards the front and in redder colors, older reconstructions appear towards the back and in bluer colors. An instrumental history of temperature is also shown in black. The medieval warm period and little ice age are labeled at roughly the times when they are historically believed to occur, though it is still disputed whether these were truly global or only regional events. The single, unsmoothed annual value for 2004 is also shown for comparison. (Image:Instrumental Temperature Record.png shows how 2004 relates to other recent years). For the purposes of this comparison, the author is agnostic as to which, if any, of the reconstructions of global mean temperature is an accurate reflection of temperature fluctuations during the last 2000 years. However, since this plot is a fair representation of the range of reconstructions appearing in the published scientific literature, it is likely that such reconstructions, accurate or not, will play a significant role in the ongoing discussions of global climate change and global warming. For each reconstruction, the raw data has been decadally smoothed with a σ = 5 yr Gaussian weighted moving average. Also, each reconstruction was adjusted so that its mean matched the mean of the instrumental record during the period of overlap. The variance (i.e. the scale of fluctuations) was not adjusted (except in one case noted below). Except as noted below, all original data for this comparison comes from [1] and links therein. It should also be noted that many reconstructions of past climate report substantial error bars, which are not represented on this figure. ReconstructionsThe reconstructions used, in order from oldest to most recent publication are:
(black 1856-2004): Instrumental data was jointly compiled by the w:Climatic Research Unit and the UK Meteorological Office Hadley Centre. Global Annual Average data set TaveGL2v [2] was used. Documentation for the most recent update of the CRU/Hadley instrumental data set appears in: Error: journal= not stated. |
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The original version of this figure was prepared by Robert A. Rohde from publicly available data, and is incorporated into the Global Warming Art project. Image from Global Warming Art
This image is an original work created for Global Warming Art. Please refer to the image description page for more information.
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| Author | tłumaczył dla pl wiki Dobrzejest, wikipedia.pl : Adi4000[3] |
Licensing
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers. | |
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| This licensing tag was added to this file as part of the GFDL licensing update. |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:33, 5 April 2008 | | 600 × 443 (35 KB) | Adi (talk | contribs) | {{Information |Description= thumb|250px|Expansion of the last 1000 years [[Image:Holocene_Temperature_Variations.png|thumb|250px|Temperature variations during the preceding 12000 years. Note that present day |
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