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"Golabal Temperatures havent risen in Ten Years"

Discussion in 'Political Discussion' started by Wildo7, Apr 22, 2008.

  1. Wildo7

    Wildo7 Totally Full of It

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    http://data.giss.nasa.gov/gistemp/2007/

    The quasi-regularity of some natural climate forcing mechanisms, combined with knowledge of human-made forcings, allows projection of near-term global temperature trends with reasonably high confidence. Prediction for a specific year is a bit hazardous, as evidenced by an incorrect prediction of record global warmth made by the British climate analysis group for 2007. Such speculations are useful, as they draw attention to the mechanisms, and allow testing of understanding. Presumably part of the basis for their prediction was an assumption of a continued warming contribution from the 2006 El NiƱo. However, evidence of El NiƱo warmth disappeared very early in 2007.

    Solar irradiance will still be on or near its flat-bottomed minimum in 2008. Temperature tendency associated with the solar cycle, because of the Earth's thermal inertia, has its minimum delayed by almost a quarter cycle, i.e., about two years. Thus solar change should not contribute significantly to temperature change in 2008.

    La NiƱa cooling in the second half of 2007 (Figure 2) is about as intense as the regional cooling associated with any La NiƱa of the past half century, as shown by comparison to Plate 9 in Hansen et al. (Hansen et al. 1999) and updates to Plate 9 on the GISS web site. Effect of the current La NiƱa on global surface temperature is likely to continue for at least the first several months of 2008. Based on sequences of Pacific Ocean surface temperature patterns in Plate 9, a next El NiƱo in 2009 or 2010 is perhaps the most likely timing. But whatever year it occurs, it is a pretty safe bet that the next El NiƱo will help carry global temperature to a significantly higher level.

    Competing with the short-term solar and La NiƱa cooling effects is the long-term global warming effect of human-made GHGs. The latter includes the trend toward less Arctic sea ice that markedly increases high latitude Northern Hemisphere temperatures. Although sea ice cover fluctuates from year to year, the large recent loss of thick multi-year ice implies that this warming effect at high latitudes should persist.
     
  2. patsfan13

    patsfan13 Hall of Fame Poster PatsFans.com Supporter

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    NASA still doesn't acknowledge that their Partial Differential Eq boundaries used in their models are incorrect and giving garbage data.
     

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