@parados,
Parados, you missed my point. I was giving you evidence that AAGT is not directly proportional to SI within a Texas summer's 24 hour period. Therefore, you should conclude there is no reason to require that an X% increase in SI must produce an X% increase in AAGT in order to validly conclude that SI variations are the major cause of AAGT variations..
SI has had an increasing trend since 1900 up to about 2000. AAGT has had an increasing trend since 1900 up to about 1998. Since 1998 AAGT has had a decreasing trend and since 2000, SI has had a decreasing trend. On the otherhand, CAD has had a steadily increasing trend ever since 1900. The fact that the percent changes in SI are not equal to the percent changes in AAGT does not support the farfetched conclusion that CAD increases are the major cause of AAGT increases just because CAD.has had a far far bigger percent change over 1900 to 2008 than has AAGT.
YEAR .CAD /\ ..SI \/..A-AAGT \/.
1998 367.61 1366.11 0.546
1999 368.59 1366.39 0.296
2000 370.33 1366.67 0.270
2001 371.83 1366.40 0.409
2002 374.45 1366.37 0.464
2003 376.71 1366.07 0.473
2004 378.23 1365.91 0.447
2005 380.78 1365.81 0.482
2006 382.55 1365.72 0.422
2007 384.60 1365.66 0.405
2008 386.20 1365.60 0.325
AAGT= ANNUAL AVERAGE GLOBAL TEMPERATURE in °K
A-AAGT = ANOMALIES of AAGT = AAGT - CAGT in °K
SI = SOLAR IRRADIANCE in W/M^2
CAD = CO2 ATMOSPHERIC DENSITY in PPM