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Politics : Formerly About Advanced Micro Devices
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To: Bilow who wrote (764669)1/20/2014 11:36:16 AM
From: Wharf Rat  Read Replies (1) of 1573221
 
"You really meant to reference the 2013 IPCC report didn't you?"

Couldn't get into that; didn't think you would like this, cuz I don't think you liked it the first time.

IPCC model global warming projections have done much better than you think
Global warming since 1990 has fallen within the range of IPCC climate model projections



Models that simulate the Earth's climate are constantly improving. Photograph: NASA/Corbis

The figure below from the 2013 Intergovernmental Panel on Climate Change (IPCC) report compares the global surface warming projections made in the 1990, 1995, 2001, and 2007 IPCC reports to the temperature measurements.

IPCC AR5 Figure 1.4. Solid lines and squares represent measured average global surface temperature changes by NASA (blue), NOAA (yellow), and the UK Hadley Centre (green). The colored shading shows the projected range of surface warming in the IPCC First Assessment Report (FAR; yellow), Second (SAR; green), Third (TAR; blue), and Fourth (AR4; red). Since 1990, global surface temperatures have warmed at a rate of about 0.15°C per decade, within the range of model projections of about 0.10 to 0.35°C per decade. As the IPCC notes,

"global climate models generally simulate global temperatures that compare well with observations over climate timescales ... The 1990–2012 data have been shown to be consistent with the [1990 IPCC report] projections, and not consistent with zero trend from 1990 ... the trend in globally-averaged surface temperatures falls within the range of the previous IPCC projections."



theguardian.com
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