A24C:
Climate Sensitivity and Feedbacks: Advances and New Paradigms II


Submit an Abstract to this Session


Session ID#: 58235

Session Description:
A major goal of current climate research is to reduce uncertainty in metrics of large-scale forced climate responses, such as the Equilibrium Climate Sensitivity (ECS), the eventual warming in response to doubled atmospheric CO2. The ECS is estimated at 1.5—4.5 K, a range largely due to clouds and other moist processes. These processes are deeply intertwined and are linked to changes in societally important factors such as precipitation. This session explores recent advances in understanding large-scale climate response to climate forcings. We welcome submissions on theory, observations and modelling studies of climate feedbacks, climate sensitivity, and climate responses of precipitation and large-scale dynamics, especially those exploring novel evaluation techniques such as emergent constraints, and new ways of thinking about processes that govern climate's response to external forcing.
Primary Convener:  Kate Marvel, Lawrence Livermore National Laboratory, Livermore, United States
Conveners:  Maria Zita Hakuba, Jet Propulsion Laboratory, Pasadena, United States, Chad William Thackeray, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Mark Richardson, Colorado State University, Fort Collins, CA, United States
Primary Liaison:  Kate Marvel, Lawrence Livermore National Laboratory, Livermore, United States
Chairs:  Chad William Thackeray, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States, Maria Zita Hakuba, Jet Propulsion Laboratory, Caltech, Pasadena, United States and Kate Marvel, Lawrence Livermore National Laboratory, Livermore, United States
OSPA Liaison:  Kate Marvel, Lawrence Livermore National Laboratory, Livermore, United States

Cross-Listed:
  • GC - Global Environmental Change
Index Terms:

1620 Climate dynamics [GLOBAL CHANGE]
3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3310 Clouds and cloud feedbacks [ATMOSPHERIC PROCESSES]
3337 Global climate models [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Using the instrumental record to constrain transient and equilibrium climate sensitivity (Invited) (386091)
Gabriele C Hegerl, University of Edinburgh, Edinburgh, United Kingdom, Piers Forster, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Andrew P Schurer, University of Edinburgh, Edinburgh, EH9, United Kingdom and Katarzyna B Tokarska, University of Edinburgh, School of Geosciences, Edinburgh, United Kingdom
Historical time-variation in climate sensitivity related to the nature of the forcing (404339)
Jonathan M Gregory1,2, Timothy Andrews1, Thorsten Mauritsen3, Mark Webb1 and Paulo Ceppi4, (1)Met Office Hadley Centre, Exeter, United Kingdom, (2)Met Office Hadley Centre and National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom, (3)Stockholm University, Department of Meteorology, Stockholm, Sweden, (4)Grantham Institute, Imperial College, London, United Kingdom
Feedback definitions and their implications (418746)
Maria Rugenstein, Colorado State University, Department of Atmospheric Science, Fort Collins, United States, Kyle Armour, University of Washington, Deptartment of Atmospheric and Climate Science, Seattle, United States and Jonah Bloch-Johnson, National Centre for Atmospheric Research, University of Reading, Reading, United Kingdom
Stratospheric water vapor: an important climate feedback (384507)
Antara Banerjee, Columbia University of New York, Palisades, NY, United States, Gabriel Chiodo, ETH Swiss Federal Institute of Technology Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland, Michael J Previdi, Columbia University, Lamont‐Doherty Earth Observatory, Palisades, United States, Michael Ponater, German Aerospace Center DLR Oberpfaffenhofen, Institute of Atmospheric Physics, Oberpfaffenhofen, Germany and Prof. Lorenzo M Polvani, PhD, Columbia University, Department of Applied Physics and Applied Mathematics, New York, United States
Observations of Local Positive Low Cloud Feedback Patterns and Their Role in Internal Variability and Climate Sensitivity (379910)
Tianle Yuan1, Lazaros Oreopoulos2, Steven E Platnick1 and Kerry Meyer3, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)NASA GSFC, Greenbelt, United States, (3)NASA Goddard Space Flight Center, Greenbelt, United States
An Emergent Constraint on Equilibrium Climate Sensitivity from Global Temperature Variability (Invited) (373784)
Peter Michael Cox1, Mark Williamson2, Chris Huntingford3 and Femke Joanne Myrthe Milene Nijsse2, (1)University of Exeter, Exeter, United Kingdom, (2)University of Exeter, Exeter, EX4, United Kingdom, (3)Centre for Ecology and Hydrology, Wallingford, United Kingdom
Assumptions for Emergent Constraint on Climate Sensitivity from Global Temperature Variability (Invited) (373573)
Mark Williamson1, Peter Michael Cox2, Chris Huntingford3 and Femke Joanne Myrthe Milene Nijsse1, (1)University of Exeter, Exeter, EX4, United Kingdom, (2)University of Exeter, Exeter, United Kingdom, (3)Centre for Ecology and Hydrology, Wallingford, United Kingdom
Should we Trust Emergent Constraints? (Invited) (353479)
Peter Martin Caldwell1, Mark Zelinka1 and Stephen A Klein2, (1)Lawrence Livermore National Laboratory, Livermore, CA, United States, (2)Lawrence Livermore National Laboratory, Livermore, United States

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