Approximate number of petition signatories=19,700
Identity confirmed by independent entity rate=90%
Revised number verified signatories=17,730
Signatories in direct, related fields rate=13%
Number in direct, related fields=2304
Signatories in extended, related fields rate=25%
Number in extended, related fields=4432
Total verified, qualified rate=38%
Total number verified, qualified=6736
The Scientific American provided these data. 26 of 1400 PhD level climate scientists listed on the petition (<2%) were contacted.
Of this pitifully small and non-representative sample fully 42% (11/26) stated they sill agreed with the petition statement.
26/6376=sample/Total nunber verified, qualified=0.4%
Compare this with the similar figures for the IPCC:
Qualified members in direct, related fields=70 (<3%) -From Patrick J. Michaels, Meltdown