HIDE THE DECLINE, PART DEUX

HIDE-THE-DELCINE-PART-DEUX

Hide the decline deja vu? Mann’s ‘little white line’ as ‘False Hope’ may actually be false hype

Foreword by Anthony Watts, wattsupwiththat.com

An essay by Monckton of Brenchley follows, but I wanted to bring this graphic from Dr. Mann’s recent Scientific American article to attention first. In the infamous “hide the decline” episode revealed by Climategate surrounding the modern day ending portion of the “hockey stick”, Mann has been accused of using “Mike’s Nature Trick” to hide the decline in modern (proxy) temperatures by adding on the surface record. In this case, the little white line from his SciAm graphic shows how “the pause” is labeled a “faux pause”, (a little play on words) and how the pause is elevated above past surface temperatures.

earth-will-cross-the-climate-danger-threshold-by-2036_large[1]
Source: http://www.scientificamerican.com/sciam/assets/Image/articles/earth-will-cross-the-climate-danger-threshold-by-2036_large.jpg

Zoom of section of SciAm's graph from Dr. Mann. The 1°C line was added for reference.

Looking at the SciAm graphic (see zoom at right), something didn’t seem right, especially since there doesn’t seem to be any citation given for what the temperature dataset used was. And oddly, the graphic shows Mann’s little white line peaking significantly warmer that the 1998 super El Niño, and showing the current temperature equal to 1998, which doesn’t make any sense.

So, over  the weekend I asked Willis Eschenbach to use his “graph digitizer” tool (which he has used before) to turn Mann’s little white line into numerical data, and he happily obliged.

Here is the result when Mann’s little white line is compared and matched to two well known surface temperature anomaly datasets:

 

mann_falsehope_vs_GISS-HAD4

Read the rest of the article here.