In response to the barrage of recent posts by a certain member of this board, the vast majority of which reflect, and discuss nothing more than the output of computer models, I am going to post some recently published papers based on actual observation. The contrast is remarkable.
Reexamining the warming in the tropical upper troposphere: Models versus radiosonde observations
This paper, recently published in Geophysical Research Letters once again, proves that the hot spot, predicted, and required in order to validate the AGW hypothesis is still conspicuously missing. Without a hot spot, the AGW hypothesis is, and remains dead in the water insofar as the scientific method is concerned.
No, that is not what it says at all. It points out that the present data indicates that while the models predict correctly that the upper troposphere would warm, the warming was not as great as the what the models predicted. Hardly invalidates the models, simply says that some factors have not been taken into account.
Reexamining the warming in the tropical upper troposphere: Models versus radiosonde observations
Reexamining the warming in the tropical upper troposphere: Models versus radiosonde observations
Key PointsWarming amplification in models exceeds satellite-observed
Comparisons of models with radiosonde data only partially support this finding
Results are sensitive to dataset choice and upper tropospheric level analyzed
Dian J. Seidel
Air Resources Laboratory, NOAA, College Park, Maryland, USA
Melissa Free
Air Resources Laboratory, NOAA, College Park, Maryland, USA
James S. Wang
Air Resources Laboratory, NOAA, College Park, Maryland, USA
Universities Space Research Association, Columbia, Maryland, USA
A recent study of 19792010 tropical tropospheric temperature trends in climate model simulations and satellite microwave sounding unit (MSU) observations concluded that, although both showed greater warming in the upper than lower troposphere, the vertical amplification of warming was exaggerated in most models. We repeat that analysis of temperature trends, vertical difference trends, and trend ratios using five radiosonde datasets. Some, but not all, comparisons support the notion that vertical amplification in models exceeds that observed. However, larger ranges of radiosonde trends compared with those for MSU, and the sensitivity of results to the upper-tropospheric level analyzed, make it difficult to conclude unambiguously that models are inconsistent with radiosonde observations
. The larger ranges are due to the availability of more radiosonde datasets with different approaches for adjusting measurement biases. Together these two studies highlight challenges of using imperfect observations of tropical tropospheric temperature over a few decades to assess climate model performance