Why is longwave cloud feedback positive

By M. Zelinka, D. Hartmann. 2010

275 citations recorded by the source corpus.

Subfields: Atmospheric Science, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/29b17ad74a9abeacefa894d0f70acbfc4523439e

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Citations in the corpus

The Atmospheric Energy Constraint on Global-Mean Precipitation Change (2014, background): “Zelinka and Hartmann (2010) studied the LW cloud feedback (at the TOA) and showed that it is dominated by high clouds maintaining a constant cloud-top FIG.”
The vertical distribution of cloud feedback in coupled ocean‐atmosphere models (2011, background): “[3] Several studies have diagnosed climate feedbacks in GCM simulations prepared for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC‐AR4) [Bony et al., 2006; Forster and Taylor, 2006; Ringer et al., 2006; Soden and Held, 2006; Soden et al., 2008; Webb et al., 2006; Dufre”
Climate Feedbacks and Their Implications for Poleward Energy Flux Changes in a Warming Climate (2011, background): “Zelinka and Hartmann (2010) showed that the robustly positive tropical LW cloud feedback is simply due to the fact that tropical high clouds rise as the climate warms, and that models capture this because it arises as a fundamental result of radiative–convective equilibrium.”
Computing and Partitioning Cloud Feedbacks Using Cloud Property Histograms. Part II: Attribution to Changes in Cloud Amount, Altitude, and Optical Depth (2012, background): “…constraints exist on cloud altitude and its changes, namely, the location of radiatively driven divergence in the tropics (Hartmann and Larson 2002; Zelinka and Hartmann 2010), and the height of the tropopause in the extratropics (Kushner et al. 2001; Santer et al. 2003; Lorenz and DeWeaver 2007).”
Evaluation of CNRM Earth System Model, CNRM‐ESM2‐1: Role of Earth System Processes in Present‐Day and Future Climate (2019, background): “4208 CM6‐1 and CNRM‐ESM2‐1, could potentially explain the stronger longwave cloud feedback with respect to the CMIP5 ensemble, as this process dominates the (positive) longwave cloud feedback in general (Zelinka & Hartmann, 2010).”
Contributions of Different Cloud Types to Feedbacks and Rapid Adjustments in CMIP5 (2012, background): “As the planet warms because of quadrupled CO2 levels, cloud-top altitude increases at nearly every location, leading to a large positive LW cloud feedback, consistent with Zelinka and Hartmann (2010) and Zelinka et al. (2012b).”
Insights from a refined decomposition of cloud feedbacks (2016, background): “REFINED CLOUD FEEDBACK DECOMPOSITION 9262 Zelinka and Hartmann, 2010], the non-low cloud altitude feedback is robustly positive across models.”
On Constraining Estimates of Climate Sensitivity with Present-Day Observations through Model Weighting (2011, result): “The longwave cloud radiative effect in our ensemble does not change much between present-day and doubled CO2 conditions, which is also consistent with robust (positive) longwave cloud feedbacks across the CMIP3 simulations (Zelinka and Hartmann 2010).”
Advances in Understanding Top-of-Atmosphere Radiation Variability from Satellite Observations (2012, background): “…Zelinka and Hartmann (2011) show that while high clouds rise with warming, in agreement with the fixed anvil temperature (Hartmann and Larson 2002) and proportionately higher anvil temperature (Zelinka and Hartmann 2010) hypotheses, the increase is compensated by a decrease in high cloud amount.”
Climate and climate change in a radiative‐convective equilibrium version of ECHAM6 (2013, background): “The brightness temperatures shown in Figure 9 are higher than the expected air temperature at the top of high clouds of about 227 K [e.g., Zelinka and Hartmann, 2010], which suggests that the clouds are not completely opaque at the top of the convecting regions.”
Cloud feedback mechanisms and their representation in global climate models (2017, unknown): “In practice, tropical high clouds rise slightly less than the isotherms in response to modeled global warming, leading to a slight warming of their emission temperature—albeit a much weaker warming than occurs at a fixed pressure level (roughly six times smaller).(52) This is related to an increase ”