Tropospheric Adjustment Induces a Cloud Component in CO2 Forcing

By J. Gregory, M. Webb. 2008

309 citations recorded by the source corpus.

Subfields: Atmospheric Science, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/702ba2014b2e06a112b97686f56b24770a2c830a

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Citations in the corpus

Total aerosol effect: radiative forcing or radiative flux perturbation? (2009, background): “Another important outcome from this work is that “fast feedbacks”, such as cloud changes that respond directly to the forcing of CO2 rather than to1T , are now regarded as part of the forcing (Gregory and Webb, 2008; Andrews and Forster, 2008).”
The vertical distribution of cloud feedback in coupled ocean‐atmosphere models (2011, background): “Others have argued that much of the uncertainty arises from rapid cloud adjustments that are a direct response of clouds to changes in carbon dioxide rather than to changes in surface temperature [Gregory and Webb, 2008; Andrews and Forster, 2008].”
Fast and slow precipitation responses to individual climate forcers: A PDRMIP multimodel study (2016, methodology): “A Gregory-style regression was also performed [Gregory and Webb, 2008], regressing the global, annual mean flux change relative to the baseline simulation against the change in surface air temperature (ΔTS) in the coupled simulations.”
Anthropogenic and Natural Radiative Forcing (2014, methodology): “…(e.g., Hansen et al., 2005) or (2) analyzing the transient global mean surface temperature response to an instantaneous perturbation and using the regression of the response extrapolated back to the start of the simulation to derive the initial ERF (Gregory et al., 2004; Gregory and Webb, 2008).”
Contributions of Different Cloud Types to Feedbacks and Rapid Adjustments in CMIP5 (2012, background): “Recently it has become apparent that clouds also respond directly to the greenhouse gas perturbation in such a way as to modify the radiative budget of the planet independently of their surface temperature– mediated effects (Gregory and Webb 2008).”
Precipitation, radiative forcing and global temperature change (2010, unknown): “Note that fast and slow responses can also be estimated from linear regression during transient climate change [Gregory and Webb, 2008], which can also provide useful energetic constraints on how much precipitation increases with DT [e.”
Forcing and feedback in the MPI‐ESM‐LR coupled model under abruptly quadrupled CO2 (2013, methodology): “However, a key finding in applications of the Gregory method is that adjusted CO2 forcing varies considerably among climate models due to fast cloud adjustment [Gregory and Webb, 2008].”
Climate Feedbacks and Their Implications for Poleward Energy Flux Changes in a Warming Climate (2011, background): “Gregory and Webb (2008) have suggested that cloud cover responds directly to increased CO2 such that an appreciable portion of the cloudinduced radiative response commonly included as part of the cloud feedback is not temperature mediated.”
Importance of Ocean Heat Uptake Efficacy to Transient Climate Change (2010, background): “Fast tropospheric responses analogous to stratospheric adjustment are possible, and can be isolated in the switch-on mixed-layer simulations of Gregory and Webb (2008), or in fixed SST experiments with imposed forcings.”
Observational Evidence That Enhanced Subsidence Reduces Subtropical Marine Boundary Layer Cloudiness (2013, background): “These processes act to increase albedo from cloudiness and may counteract other processes acting to decrease it, such as warmer sea surface temperature and greater downwelling radiation from more CO2 in the atmosphere (Norris and Leovy 1994; Gregory and Webb 2008; Blossey et al. 2013; Bretherton et ”
The equilibrium sensitivity of the Earth's temperature to radiation changes (2008, background): “There is an unclear separation between forcing and fast feedbacks (for example clouds changing as a result of CO 2 -induced heating rates rather than the slower surface warmin”
The Dependence of Radiative Forcing and Feedback on Evolving Patterns of Surface Temperature Change in Climate Models (2015, unknown): “However, as noted by Gregory and Webb (2008), this assumption is physically implausible because it assumes the feedbacks in the transient experiment (where both the land and SSTs respond) are the same in the ﬁxed-SST experiments (where the feedbacks over the ocean have been inhibited by the…”
Overview of the Coupled Model Intercomparison Project Phase 6 (CMIP6) experimental design and organization (2015, background): “…uncertainty with which the effective CO2 radiative forcing could be quantified and would allow more detailed and accurate diagnosis of the fast responses of the system under an abrupt change in forcing (Bony et al., 2013; Gregory and Webb, 2008; Kamae and Watanabe, 2013; Sherwood et al., 2015).”
Impact of the Atlantic meridional overturning circulation on ocean heat storage and transient climate change (2014, background): “Introduction Forced with greenhouse gases (GHGs), the climate system adjusts towards a new equilibrium on various timescales: ultrafast responses in the stratosphere and troposphere (days and weeks), fast responses of the land-surface and the ocean’s mixed layer (months and years), and a long-term a”
Climate change projections using the IPSL-CM5 Earth System Model: from CMIP3 to CMIP5 (2013, background): “As stated before, the definition of the forcing ∆Qt is not unequivocal and recent work shows that the decomposition of 837 the forcing in a fast and a slow part allows to better analyze and better understand the temperature and precipitation 838 responses to a CO2 forcing (Andrews and Forster, 2008;”
An overview of CMIP5 and the experiment design (2012, background): “b Fast responses,” as discussed, for example, in Gregory and Webb (2008), are the climate system responses that occur on time scales”
On the interpretation of inter-model spread in CMIP5 climate sensitivity estimates (2013, background): “While Gregory and Webb (2008)’s and the present estimates are 231 relatively similar for the SW component, substantial differences arise for the LW cloud adjustment.”