Title: Description of historical and future projection simulations by the global coupled E3SMv1.0 model as used in CMIP6

Abstract

This paper documents the experimental setup and general features of the coupled historical and future climate simulations with the first version of the US Department of Energy (DOE) Energy Exascale Earth System Model (E3SMv1.0). The future projected climate characteristics of E3SMv1.0 at the highest emission scenario (SSP5-8.5) designed in the Scenario Model Intercomparison Project (ScenarioMIP) and the SSP5-8.5 greenhouse gas (GHG) only forcing experiment are analyzed with a focus on regional responses of atmosphere, ocean, sea ice, and land. Due to its high equilibrium climate sensitivity (ECS of 5.3 K), E3SMv1.0 is one of the Coupled Model Intercomparison Project phase 6 (CMIP6) models with the largest surface warming by the end of the 21st century under the high-emission SSP5-8.5 scenario. The global mean precipitation change is highly correlated with the global temperature change, while the spatial pattern of the change in runoff is consistent with the precipitation changes. The oceanic mixed layer generally shoals throughout the global ocean. The annual mean Atlantic meridional overturning circulation (AMOC) is overly weak with a slower change from ~11 to ~6 Sv (Sverdrup) relative to other CMIP6 models. The sea ice, especially in the Northern Hemisphere, decreases rapidly with large seasonal variability. We detectmore » a significant polar amplification in E3SMv1.0 from the atmosphere, ocean, and sea ice. Comparing the SSP5-8.5 all-forcing experiment with the GHG-only experiment, we find that the unmasking of the aerosol effects due to the decline of the aerosol loading in the future projection period causes transient accelerated warming in the all-forcing experiment in the first half of the 21st century. While the oceanic climate response is mainly controlled by the GHG forcing, the land runoff response is impacted primarily by forcings other than GHG over certain regions, e.g., southern North America, southern Africa, central Africa, and eastern Asia. However, the importance of the GHG forcing on the land runoff changes grows in the future climate projection period compared to the historical period.« less

Authors:

Zheng, Xue ;

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• Search DOE PAGES for ORCID "0000-0002-9372-1776"

Li, Qing ;

• Search DOE PAGES for author "Li, Qing"
• Search DOE PAGES for ORCID "0000-0002-6464-0977"

Zhou, Tian ;

• Search DOE PAGES for author "Zhou, Tian"
• Search DOE PAGES for ORCID "0000-0003-1582-4005"

Tang, Qi ;

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• Search DOE PAGES for ORCID "0000-0003-2959-0203"

Van Roekel, Luke P. ;

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• Search DOE PAGES for ORCID "0000-0003-1418-5686"

Golaz, Jean-Christophe ;

• Search DOE PAGES for author "Golaz, Jean-Christophe"
• Search DOE PAGES for ORCID "0000-0003-1616-5435"

Wang, Hailong ;

• Search DOE PAGES for author "Wang, Hailong"
• Search DOE PAGES for ORCID "0000-0002-1994-4402"

Cameron-Smith, Philip

• Search DOE PAGES for author "Cameron-Smith, Philip"
• Search DOE PAGES for ORCID "0000-0002-8802-8627"

Publication Date:

Mon May 16 00:00:00 EDT 2022

Research Org.:

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1867940

Alternate Identifier(s):

OSTI ID: 1878290; OSTI ID: 1883145; OSTI ID: 1885109

Report Number(s):

PNNL-SA-166656; LLNL-JRNL-826361; LA-UR-21-28935
Journal ID: ISSN 1991-9603

Grant/Contract Number:  

E3SM project; AC05-76RL01830; AC52-07NA27344; AC02-05CH11231; 89233218CNA000001

Resource Type:

Published Article

Journal Name:

Geoscientific Model Development (Online)

Additional Journal Information:

Journal Name: Geoscientific Model Development (Online) Journal Volume: 15 Journal Issue: 9; Journal ID: ISSN 1991-9603

Publisher:

Copernicus GmbH

Country of Publication:

Germany

Language:

English

Subject:

54 ENVIRONMENTAL SCIENCES; Earth sciences