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Research suggests that the sun's magnetic field has strengthened since 1900, weakening the cosmic-ray flow and reducing average cloud cover – which allows temperatures to rise. The experiments could show that the sun, not greenhouse gases, explains most global warming
reply to post by melatonin
There is no significant trend in the GCR data
Originally published in Science Express on 11 August 2005
Science 2 September 2005:
Vol. 309. no. 5740, pp. 1551 - 1556
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Amplification of Surface Temperature Trends and Variability in the Tropical Atmosphere
B. D. Santer,1* T. M. L. Wigley,2 C. Mears,3 F. J. Wentz,3 S. A. Klein,1 D. J. Seidel,4 K. E. Taylor,1 P. W. Thorne,5 M. F. Wehner,6 P. J. Gleckler,1 J. S. Boyle,1 W. D. Collins,2 K. W. Dixon,7 C. Doutriaux,1 M. Free,4 Q. Fu,8 J. E. Hansen,9 G. S. Jones,5 R. Ruedy,9 T. R. Karl,10 J. R. Lanzante,7 G. A. Meehl,2 V. Ramaswamy,7 G. Russell,9 G. A. Schmidt9
The month-to-month variability of tropical temperatures is larger in the troposphere than at Earth's surface. This amplification behavior is similar in a range of observations and climate model simulations and is consistent with basic theory. On multidecadal time scales, tropospheric amplification of surface warming is a robust feature of model simulations, but it occurs in only one observational data set. Other observations show weak, or even negative, amplification. These results suggest either that different physical mechanisms control amplification processes on monthly and decadal time scales, and models fail to capture such behavior; or (more plausibly) that residual errors in several observational data sets used here affect their representation of long-term trends.
The new data fit nicely with the models, particularly in the problematic tropics where the extra warming of the atmosphere is greatest. ''This study is significant because it removes one of the arguments that the climate skeptics have used," said Chiang.
Santer hopes his results will help move the climate change debate forward. ''Most reasonable scientists believe that we know enough now, that we've found strong causal links between human activity and the global warming we've already experienced," he said.
We examine the sensitivity of modeled and observed tropical tropospheric temperature trend amplification (the ratio of T2LT “lower troposphere” to surface changes) to several sources of uncertainty. Model behaviour is robust across a large perturbed physics ensemble of HadCM3, yielding a smaller amplification range (1.44 ± 0.06) than a previous multi-model ensemble (1.41 ± 0.24). The uncertainty of inter-satellite calibration implied by available MSU T2 (mid-troposphere) estimates (σ = 0.035K) is much greater than that required to adequately resolve the trend (σ < 0.01K), or the amplification behaviour (implied amplification range ±0.95). Trend amplification uncertainty in both models and observations decreases as the timescale increases. Depending upon choice of dataset and time period, uncertainty in trend amplification estimates over 21 years lies between ±1.5 and ±0.2.
Do you really think there would be a time when these people would say - 'yes, we have enough evidence, lets act'? I doubt it...
Originally posted by Terrapop
Well, even the pope is now taking side against Gore & Co. puppets
Originally posted by IMAdamnALIEN
Everyone knows global warming is caused by the sun!
What the H E L L are we supposed to do about the sun getting hotter?
I know I know!!!
Lets nuke the sun........