DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evaluating Climate Model Simulations of the Radiative Forcing and Radiative Response at Earth’s Surface

Journal Article · · Journal of Climate
 [1];  [1];  [2]
  1. Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida
  2. National Center for Atmospheric Research, Boulder, Colorado

In this work, we analyze the radiative forcing and radiative response at Earth’s surface, where perturbations in the radiation budget regulate the atmospheric hydrological cycle. By applying a radiative kernel-regression technique to CMIP5 climate model simulations where CO2 is instantaneously quadrupled, we evaluate the intermodel spread in surface instantaneous radiative forcing, radiative adjustments to this forcing, and radiative responses to surface warming. The cloud radiative adjustment to CO2 forcing and the temperature-mediated cloud radiative response exhibit significant intermodel spread. In contrast to its counterpart at the top of the atmosphere, the temperature-mediated cloud radiative response at the surface is found to be positive in some models and negative in others. Also, the compensation between the temperature-mediated lapse rate and water vapor radiative responses found in top-of-atmosphere calculations is not present for surface radiative flux changes. Instantaneous radiative forcing at the surface is rarely reported for model simulations; as a result, intermodel differences have not previously been evaluated in global climate models. We demonstrate that the instantaneous radiative forcing is the largest contributor to intermodel spread in effective radiative forcing at the surface. We also find evidence of differences in radiative parameterizations in current models and argue that this is a significant, but largely overlooked, source of bias in climate change simulations.

Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FC02-97ER62402
OSTI ID:
1526783
Journal Information:
Journal of Climate, Journal Name: Journal of Climate Journal Issue: 13 Vol. 32; ISSN 0894-8755
Publisher:
American Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

Climate radiative feedbacks and adjustments at the Earth's surface: Surface radiative climate feedbacks journal April 2015
Radiative flux and forcing parameterization error in aerosol-free clear skies: RADIATION PARAMETERIZATION ERRORS journal July 2015
Origins of climate model discrepancies in atmospheric shortwave absorption and global precipitation changes: INTER-GCM SPREAD IN SHORTWAVE ABSORPTION journal October 2015
Importance of vegetation processes for model spread in the fast precipitation response to CO 2 forcing journal December 2016
Atmospheric component of the MPI-M Earth System Model: ECHAM6: ECHAM6 journal April 2013
Climate and carbon cycle changes from 1850 to 2100 in MPI-ESM simulations for the Coupled Model Intercomparison Project phase 5: Climate Changes in MPI-ESM journal July 2013
Forcing and feedback in the MPI-ESM-LR coupled model under abruptly quadrupled CO 2 : FORCING AND FEEDBACK IN THE MPI-ESM-LR journal October 2013
Evaluating adjusted forcing and model spread for historical and future scenarios in the CMIP5 generation of climate models: FORCING IN CMIP5 CLIMATE MODELS journal February 2013
Mechanisms for the land/sea warming contrast exhibited by simulations of climate change journal September 2007
The vertical distribution of climate forcings and feedbacks from the surface to top of atmosphere journal November 2011
The CNRM-CM5.1 global climate model: description and basic evaluation journal January 2012
Climate change projections using the IPSL-CM5 Earth System Model: from CMIP3 to CMIP5 journal February 2013
On the interpretation of inter-model spread in CMIP5 climate sensitivity estimates journal March 2013
Energetic Constraints on Precipitation Under Climate Change journal November 2011
A new method for diagnosing radiative forcing and climate sensitivity journal January 2004
Radiative forcing by well-mixed greenhouse gases: Estimates from climate models in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) journal January 2006
Climate feedbacks under a very broad range of forcing journal January 2009
Carbon emission limits required to satisfy future representative concentration pathways of greenhouse gases: ALLOWABLE FUTURE CARBON EMISSIONS journal March 2011
Tuning the climate of a global model: TUNING THE CLIMATE OF A GLOBAL MODEL journal March 2012
A study of general circulation model climate feedbacks determined from perturbed sea surface temperature experiments journal August 1997
Towards objective probabalistic climate forecasting journal September 2002
An observational radiative constraint on hydrologic cycle intensification journal December 2015
An assessment of methods for computing radiative forcing in climate models journal July 2015
Radiative feedbacks on global precipitation journal April 2010
A Drier Future? journal February 2014
Simulating present-day climate with the INMCM4.0 coupled model of the atmospheric and oceanic general circulations journal August 2010
Feedbacks, Timescales, and Seeing Red journal May 2009
On the Use of Cloud Forcing to Estimate Cloud Feedback journal October 2004
Using the Radiative Kernel Technique to Calculate Climate Feedbacks in NCAR’s Community Atmospheric Model journal May 2008
Quantifying Climate Feedbacks Using Radiative Kernels journal July 2008
Controls of Global-Mean Precipitation Increases in Global Warming GCM Experiments journal December 2008
A Surface Energy Perspective on Climate Change journal May 2009
Improved Climate Simulation by MIROC5: Mean States, Variability, and Climate Sensitivity journal December 2010
The Dynamical Core, Physical Parameterizations, and Basic Simulation Characteristics of the Atmospheric Component AM3 of the GFDL Global Coupled Model CM3 journal July 2011
An Overview of CMIP5 and the Experiment Design journal April 2012
Adjustments in the Forcing-Feedback Framework for Understanding Climate Change journal February 2015
The Art and Science of Climate Model Tuning journal March 2017
Climate System Response to External Forcings and Climate Change Projections in CCSM4 journal June 2012
Computing and Partitioning Cloud Feedbacks Using Cloud Property Histograms. Part I: Cloud Radiative Kernels journal June 2012
Climate Feedbacks in CCSM3 under Changing CO 2 Forcing. Part I: Adapting the Linear Radiative Kernel Technique to Feedback Calculations for a Broad Range of Forcings journal August 2012
GFDL’s ESM2 Global Coupled Climate–Carbon Earth System Models. Part I: Physical Formulation and Baseline Simulation Characteristics journal October 2012
The Atmospheric Energy Constraint on Global-Mean Precipitation Change journal January 2014
An Assessment of Direct Radiative Forcing, Radiative Adjustments, and Radiative Feedbacks in Coupled Ocean–Atmosphere Models journal May 2015
Understanding the Intermodel Spread in Global-Mean Hydrological Sensitivity journal January 2016
The Sensitivity of the Hydrological Cycle to Internal Climate Variability versus Anthropogenic Climate Change journal May 2016
Surface Albedo of the Antarctic Sea Ice Zone journal September 2005
An Assessment of Climate Feedbacks in Coupled Ocean–Atmosphere Models journal July 2006
A New Global Climate Model of the Meteorological Research Institute: MRI-CGCM3 ^|^mdash;Model Description and Basic Performance^|^mdash; journal January 2012
The ACCESS coupled model: description, control climate and evaluation journal March 2013
Surface and top-of-atmosphere radiative feedback kernels for CESM-CAM5 journal January 2018
Development and evaluation of an Earth-System model – HadGEM2 journal January 2011
MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments journal January 2011
The Norwegian Earth System Model, NorESM1-M – Part 1: Description and basic evaluation of the physical climate journal January 2013
Description and basic evaluation of Beijing Normal University Earth System Model (BNU-ESM) version 1 journal January 2014
The Radiative Forcing Model Intercomparison Project (RFMIP): experimental protocol for CMIP6 journal January 2016