Joel could you please give me a direct yes or no answer to the following question — Do you believe that strong
vertical tropospheric convective circulation would continue without radiative gases?
Could you please give me a direct yes or no answer to the following question — Do you believe that strong
vertical tropospheric convective circulation would continue without radiative gases?
David, could I please have a yes or no answer to the following — Do you believe that strong
vertical tropospheric convective circulation would continue without radiative gases?
An atmosphere without radiative gases will not exhibit strong
vertical tropospheric convective circulation.
Konrad; Could you please give me a direct yes or no answer to the following question — Do you believe that strong
vertical tropospheric convective circulation would continue without radiative gases?
Not exact matches
In addition, both internal variability and aerosol forcing are likely to affect tropical storms in large part though changes in ocean temperature gradients (thereby changing ITCZ position and
vertical shear), while greenhouse gases likely exert their influence by more uniformly changing ocean and
tropospheric temperatures, so the physics of the problem may suggest this decomposition as more natural as well.
The AWP - induced changes related to tropical cyclones that we emphasize here include a dynamical parameter of
tropospheric vertical wind shear and a thermodynamical parameter of convective instability.
For the validity of Fu et al. (2004) in the tropics, you might also read our recent paper entitled «Satellite - derived
vertical dependence of tropical
tropospheric temperature trends» by Fu and Johanson (2005, Geophysical Research Letter, in press).
For example, nearly all recent model intercomparisons show that AOGCMs poorly reproduce precipitation in 30 ° S - 30 ° N, they still diverge for cloud cover evolution at different levels of the
vertical column, and I don't clearly understand for my part how we can speculate on long term trends of
tropospheric T without a good understanding of these convection - condensation - precipitation process.
First, for changing just CO2 forcing (or CH4, etc, or for a non-GHE forcing, such as a change in incident solar radiation, volcanic aerosols, etc.), there will be other GHE radiative «forcings» (feedbacks, though in the context of measuring their radiative effect, they can be described as having radiative forcings of x W / m2 per change in surface T), such as water vapor feedback, LW cloud feedback, and also, because GHE depends on the
vertical temperature distribution, the lapse rate feedback (this generally refers to the
tropospheric lapse rate, though changes in the position of the tropopause and changes in the stratospheric temperature could also be considered lapse - rate feedbacks for forcing at TOA; forcing at the tropopause with stratospheric adjustment takes some of that into account; sensitivity to forcing at the tropopause with stratospheric adjustment will generally be different from sensitivity to forcing without stratospheric adjustment and both will generally be different from forcing at TOA before stratospheric adjustment; forcing at TOA after stratospehric adjustment is identical to forcing at the tropopause after stratospheric adjustment).
For example, most recently in Klotzbach et al 2009, we find a significant divergence between the lower
tropospheric and surface temperature trends, which can be explained in part by the more limited
vertical sampling of temperature trends using just the surface temperature data.
North American, annual - mean OMI (Ozone Monitoring Instrument)
tropospheric NO2 VCDs (
vertical column density)(2005 — 2010) averaged onto a 0.25 ° x 0.25 ° grid.
Qiang Fu and Celeste M. Johanson (26 May 2005) Satellite - derived
vertical dependence of tropical
tropospheric temperature trends, Geophysical Research Letters, Vol.
In summary, the debate in this field revolves around the idea of discrepancy in surface and
tropospheric trends in the tropics where
vertical convection dominates heat transfer.
Radiative cooling at altitude is critical for continued
vertical circulation in the Hadley, Ferrel and Polar
tropospheric convection cells.
However strong
vertical convective circulation in the Hadley, Ferrel and Polar
tropospheric cells is continuing for all regions of the globe you could point to at this time.
The «basic physics» of the «settled science» never correctly modelled the role of radiative gases in
tropospheric vertical convection.
The story behind mid-to-upper
tropospheric warming strongly involves the
vertical energy flow, which will be the focus of the discussion.
This has resulted in a modest suppression of 200 mb upper
tropospheric easterly wind anomalies in the tropical Atlantic, thereby increasing
vertical wind shear in the western Atlantic.