Shallowness of tropical low clouds as a predictor of climate models’ response to warming

@article{Brient2015ShallownessOT,
  title={Shallowness of tropical low clouds as a predictor of climate models’ response to warming},
  author={Florent Brient and Tapio Schneider and Zhihong Tan and Sandrine Bony and Xin Qu and Alex D. Hall},
  journal={Climate Dynamics},
  year={2015},
  volume={47},
  pages={433-449}
}
How tropical low clouds change with climate remains the dominant source of uncertainty in global warming projections. An analysis of an ensemble of CMIP5 climate models reveals that a significant part of the spread in the models’ climate sensitivity can be accounted by differences in the climatological shallowness of tropical low clouds in weak-subsidence regimes: models with shallower low clouds in weak-subsidence regimes tend to have a higher climate sensitivity than models with deeper low… 
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References

SHOWING 1-10 OF 108 REFERENCES
Interpretation of the positive low-cloud feedback predicted by a climate model under global warming
The response of low-level clouds to climate change has been identified as a major contributor to the uncertainty in climate sensitivity estimates among climate models. By analyzing the behaviour of
Marine boundary layer clouds at the heart of tropical cloud feedback uncertainties in climate models
The radiative response of tropical clouds to global warming exhibits a large spread among climate models, and this constitutes a major source of uncertainty for climate sensitivity estimates. To
Subtropical Low Cloud Response to a Warmer Climate in a Superparameterized Climate Model. Part I: Regime Sorting and Physical Mechanisms
The subtropical low cloud response to a climate with SST uniformly warmed by 2 K is analyzed in the SP‐CAM superparameterized climate model, in which each grid column is replaced by a two‐dimensional
How may low‐cloud radiative properties simulated in the current climate influence low‐cloud feedbacks under global warming?
The influence of cloud modelling uncertainties on the projection of the tropical low‐cloud response to global warming is explored by perturbing model parameters of the IPSL‐CM5A climate model in a
The role of shallow convection in the water and energy cycles of the atmosphere
The Canadian Centre for Climate Modelling and Analysis atmospheric general circulation model (AGCM4) is used to study the role of shallow convection in the hydrologic and energy cycles of the
Mechanisms of marine low cloud sensitivity to idealized climate perturbations: A single‐LES exploration extending the CGILS cases
Climate change sensitivities of subtropical cloud‐topped marine boundary layers are analyzed using large‐eddy simulation (LES) of three CGILS cases of well‐mixed stratocumulus, cumulus under
Spread in model climate sensitivity traced to atmospheric convective mixing
TLDR
The mixing inferred from observations appears to be sufficiently strong to imply a climate sensitivity of more than 3 degrees for a doubling of carbon dioxide, significantly higher than the currently accepted lower bound of 1.5 degrees, thereby constraining model projections towards relatively severe future warming.
Marine Boundary Layer Cloud Feedbacks in a Constant Relative Humidity Atmosphere
AbstractThe mechanisms that govern the response of shallow cumulus, such as found in the trade wind regions, to a warming of the atmosphere in which large-scale atmospheric processes act to keep
CGILS: Results from the first phase of an international project to understand the physical mechanisms of low cloud feedbacks in single column models
CGILS—the CFMIP‐GASS Intercomparison of Large Eddy Models (LESs) and single column models (SCMs)—investigates the mechanisms of cloud feedback in SCMs and LESs under idealized climate change
An important constraint on tropical cloud ‐ climate feedback
Tropical convective anvil clouds detrain preferentially near 200 hPa. It is argued here that this occurs because clear‐sky radiative cooling decreases rapidly near 200 hPa. This rapid decline of
...
...