CMIP3 and CMIP5 Wind Stress Climatology
Lee, T., Waliser, D.E., Li, J.-L.F., Landerer, F.W. and Gierach, M.M. 2013. Evaluation of CMIP3 and CMIP5 wind stress climatology using satellite measurements and atmospheric reanalysis products. Journal of Climate 26: 5810-5826.
Describing their findings, the five researchers say that (1) "generally speaking, there is a lack of significant improvement of CMIP5 over CMIP3," that (2) "the CMIP ensemble-average zonal wind stress has eastward biases at mid-latitude westerly wind regions (30°-50°N and 30°-50°S, with CMIP being too strong by as much as 55%)," that (3) there are "westward biases in subtropical-tropical easterly wind regions (15°-25°N and 15°-25°S)," that (4) there are "westward biases at high-latitude regions (poleward of 55°S and 55°N)" that "correspond to too strong anticyclonic (cyclonic) wind stress curl over the subtropical (subpolar) ocean gyres," that (5) "in the equatorial Atlantic and Indian Oceans, CMIP ensemble zonal wind stresses are too weak and result in too small of an east-west gradient of sea level," that (6) "in the equatorial Pacific Ocean, CMIP zonal wind stresses are too weak in the central and too strong in the western Pacific," and that (7) "the CMIP [models] as a whole overestimate the magnitude of seasonal variability by almost 50% when averaged over the entire global ocean."
Even the most up-to-date CMIP5 models are still a long, long way from where they need to be for mankind to place much faith in what they predict in the way of CO2-induced global warming and its imagined negative consequences.
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