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File:The Escalator (global warming).gif

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The_Escalator_(global_warming).gif (500 × 340 pixels, file size: 618 KB, MIME type: image/gif, looped, 66 frames, 14 s)

Summary

Description
English: How Skeptics view Global Warming

One of the most common misunderstandings amongst climate change "skeptics" is the difference between short-term noise and long-term signal. This animation shows how the same temperature data (green) that is used to determine the long-term global surface air warming trend of 0.16°C per decade (red) can be used inappropriately to "cherrypick" short time periods that show a cooling trend simply because the endpoints are carefully chosen and the trend is dominated by short-term noise in the data (blue steps). Isn't it strange how five periods of cooling can add up to a clear warming trend over the last 4 decades? Several factors can have a large impact on short-term temperatures, such as oceanic cycles like the El Niño Southern Oscillation (ENSO) or the 11-year solar cycle. These short-term cycles don't have long-term effects on the Earth's temperature, unlike the continuing upward trend caused by global warming from human greenhouse gas emissions.

The data (green) are the average of the NASA GISS, NOAA NCDC, and HadCRUT4 monthly global surface temperature anomaly datasets from January 1970 through November 2012, with linear trends for the short time periods Jan 1970 to Oct 1977, Apr 1977 to Dec 1986, Sep 1987 to Nov 1996, Jun 1997 to Dec 2002, and Nov 2002 to Nov 2012 (blue), and also showing the far more reliable linear trend for the full time period (red).
Date
Source

http://www.skepticalscience.com/graphics.php?g=47

http://www.skepticalscience.com/graphics/Escalator_2012_1024.gif
Author [Skeptical Science http://www.skepticalscience.com]

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w:en:Creative Commons
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This file is licensed under the Creative Commons Attribution 3.0 Unported 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.
This file, which was originally posted to http://www.skepticalscience.com/graphics.php?g=47, was reviewed on 27 April 2021 by reviewer Natuur12, who confirmed that it was available there under the stated license on that date.

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7 May 2013

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Date/TimeThumbnailDimensionsUserComment
current01:23, 24 May 2013Thumbnail for version as of 01:23, 24 May 2013500 × 340 (618 KB)SagredoThe large version did not work, so uploaded the small version
02:34, 8 May 2013Thumbnail for version as of 02:34, 8 May 20131,024 × 697 (2.03 MB)SagredoUser created page with UploadWizard

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