  | 
          
            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
           | 
         
        
        
       
        
         
          
           | Description | 
           This image shows the instrumental record of global average  w:temperatures as compiled by the  w:NASA's  w:Goddard Institute for Space Studies. The  data set used follows the methodology outlined by Hansen, J., et al. (2006) "Global temperature change". Proc. Natl. Acad. Sci. 103: 14288-14293. Following the common practice of the  w:IPCC, the zero on this figure is the mean temperature from 1961-1990. The graph shows an overall  long-term warming trend. In the 1880s, the global temperature anomaly was on average slightly below -0.4 °C, while in the first decade of the 21st century, the anomaly was on average almost +0.5 °C. This figure was originally prepared by  Robert A. Rohde from publicly available data and is incorporated into the Global Warming Art project. | 
          
          
           | Date | 
           2010-06-20 14:41 (UTC) | 
          
          
           | Source | 
           
            
            | 
          
          
           | Author | 
           
            
             
             - derivative work:  Autopilot ( talk)
 
             
            | 
          
         
         
        
         
          
           | 
            
            | 
           This  vector image was created with  gnuplot. | 
          
         
         
        
         
            | 
          This is a  retouched picture, which means that it has been digitally altered from its original version. Modifications: Generated as svg. The original can be viewed here:  Instrumental_Temperature_Record.png. Modifications made by  Autopilot. 
              
           | 
         
        
        Source 
        Data set is:
        
set term svg size 2048,1536 fsize 60
set output "temp.svg"
set border 1
set xtics nomirror
set ytics nomirror
set grid y2 lc rgb "#c0c0c0"
set grid x lc rgb "#c0c0c0"
unset xlabel
set y2label "Global Temperature Anomaly °C"
set key reverse top left #at 1970,0.4 Left
set y2tics 0.2
unset ytics
offset=0.07
plot [1880:2010] [-0.49:0.6] \
 "Fig.A2.txt" \
        using 1:($2-offset) \
        title "Annual Average" \
        lc rgb "blue" \
        lw 5 \
        pt 5 \
        ps 0.5 \
        with linespoints, \
 "" \
        using 1:($3-offset) \
        title "Five Year Average" \
        smooth csplines \
        lc rgb "red" \
        lw 20 \
        with lines
         
          
           I, the copyright holder of this work, hereby publish it under the following licenses:
           
           
            
               | 
             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.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
              | 
             
            
           
            
             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. 
             
            
             
                | 
              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.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
               | 
              
             
            
            
           You may select the license of your choice.
           | 
         
        
        
       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
       This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
        
       
      SOS Children's Villages aims to make Wikipedia suitable for young learners. SOS Children is a global charity founded in 1949 to give children who have lost everything the childhood they deserve. Have you heard about child sponsorship? Visit our web site to find out.