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The variability of clouds and water vapor in CMIP6 models

Lauer, Axel and Bock, Lisa (2019) The variability of clouds and water vapor in CMIP6 models. CFMIP 2019 Meeting on Clouds, Precipitation, Circulation, and Climate Sensitivity, 30 Sep 30 - Oct 4, 2019, Mykonos, Greece.

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Abstract

The simulation of clouds and precipitation with global climate models has proven notoriously difficult as a multitude of nonlinear processes spanning a large range of spatial and temporal scales are involved. Biases in the simulation of present-day clouds do not only affect confidence in the capability of the models to correctly reproduce present-day climate but also raise concerns about the accurate representation of cloud feedback processes in climate change projections. In this study we investigate the performance of state-of-the-art global coupled GCMs from the sixth phase of the Coupled Model Intercomparison Project (CMIP6) by comparing simulated cloud properties with observations. A main focus is the variability of cloud properties and water vapor on seasonal and interannual time scales. The analysis is performed with the Earth System Model Evaluation Tool (ESMValTool), a community diagnostic and performance metrics tool for the evaluation of Earth System Models. The ESMValTool is applied to the ensemble of models participating in CMIP6 to evaluate the new models with satellite observations and for comparison with results from the previous generations of global coupled models (CMIP3 and CMIP5) to monitor the progress made over the recent years. The present-day performance of the models is then put into perspective with the simulated changes in cloud forcing in the abrupt 4xCO2 runs and with the equilibrium climate sensitivity of the models.

Item URL in elib:https://elib.dlr.de/129447/
Document Type:Conference or Workshop Item (Poster)
Title:The variability of clouds and water vapor in CMIP6 models
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lauer, AxelDLR, IPAhttps://orcid.org/0000-0002-9270-1044
Bock, LisaDLR, IPAhttps://orcid.org/0000-0001-7058-5938
Date:1 October 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CMIP6, clouds, evaluation, ESMValTool
Event Title:CFMIP 2019 Meeting on Clouds, Precipitation, Circulation, and Climate Sensitivity
Event Location:Mykonos, Greece
Event Type:international Conference
Event Dates:30 Sep 30 - Oct 4, 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Model Evaluation and Analysis
Deposited By: Lauer, Axel
Deposited On:15 Oct 2019 12:02
Last Modified:15 Oct 2019 12:02

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