Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2

Gerald A. Meehl; Christine A. Shields; Julie M. Arblaster; Richard Neale; Aixue Hu; H. Annamalai; Jean Christophe Golaz; John Fasullo; Nan Rosenbloom; Luke Van Roekel; Antonietta Capotondi

doi:10.1029/2023GL104313

Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2

Gerald A. Meehl
, Christine A. Shields
, Julie M. Arblaster
, Richard Neale
, Aixue Hu
, H. Annamalai
, Jean Christophe Golaz
, John Fasullo
, Nan Rosenbloom
, Luke Van Roekel
, Antonietta Capotondi

Research output: Contribution to journal › Article › Research › peer-review

9 Citations (Scopus)

Abstract

The effects of differences in climate base state are related to processes associated with the present-day South Asian monsoon simulations in the Energy Exascale Earth System Model version 2 (E3SMv2) and the Community Earth System Model version 2 (CESM2). Though tropical Pacific and Indian Ocean base state sea surface temperatures (SSTs) are over 1°C cooler in E3SMv2 compared to CESM2, and there is an overall reduction of Indian sector precipitation, the pattern of South Asian monsoon precipitation is similar in the two models. Monsoon-ENSO teleconnections, dynamically linked by the large-scale east-west atmospheric circulation, are reduced in E3SMv2 compared to CESM2. In E3SMv2, this is related to cooler tropical SSTs and ENSO amplitude that is less than half that in CESM2. Comparison to a tropical Pacific pacemaker experiment shows, to a first order, that the base state SSTs and ENSO amplitude contribute roughly equally to lower amplitude monsoon-ENSO teleconnections in E3SMv2.

Original language	English
Article number	e2023GL104313
Number of pages	10
Journal	Geophysical Research Letters
Volume	50
Issue number	17
DOIs	https://doi.org/10.1029/2023GL104313
Publication status	Published - 16 Sept 2023
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

CESM2
E3SMv2
ENSO
global coupled Earth system modeling
Indian monsoon
South Asian monsoon

Access to Document

10.1029/2023GL104313Licence: CC BY-NC

Cite this

@article{ee320e4feb364585b0e0d95f924b8443,

title = "Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2",

abstract = "The effects of differences in climate base state are related to processes associated with the present-day South Asian monsoon simulations in the Energy Exascale Earth System Model version 2 (E3SMv2) and the Community Earth System Model version 2 (CESM2). Though tropical Pacific and Indian Ocean base state sea surface temperatures (SSTs) are over 1°C cooler in E3SMv2 compared to CESM2, and there is an overall reduction of Indian sector precipitation, the pattern of South Asian monsoon precipitation is similar in the two models. Monsoon-ENSO teleconnections, dynamically linked by the large-scale east-west atmospheric circulation, are reduced in E3SMv2 compared to CESM2. In E3SMv2, this is related to cooler tropical SSTs and ENSO amplitude that is less than half that in CESM2. Comparison to a tropical Pacific pacemaker experiment shows, to a first order, that the base state SSTs and ENSO amplitude contribute roughly equally to lower amplitude monsoon-ENSO teleconnections in E3SMv2.",

keywords = "CESM2, E3SMv2, ENSO, global coupled Earth system modeling, Indian monsoon, South Asian monsoon",

author = "Meehl, \{Gerald A.\} and Shields, \{Christine A.\} and Arblaster, \{Julie M.\} and Richard Neale and Aixue Hu and H. Annamalai and Golaz, \{Jean Christophe\} and John Fasullo and Nan Rosenbloom and \{Van Roekel\}, Luke and Antonietta Capotondi",

note = "Funding Information: Portions of this study were supported by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the U.S. Department of Energy's Office of Biological and Environmental Research (BER) under Award Number DE‐SC0022070. This work also was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation (NSF) under Cooperative Agreement No. 1852977. The Energy Exascale Earth System Model (E3SM) project is funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER). E3SM production simulations were performed on a high‐performance computing cluster provided by the BER Earth System Modeling program and operated by the Laboratory Computing Resource Center at Argonne National Laboratory. Developmental simulations, as well as post‐processing and data archiving of production simulations used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. The CESM project is supported primarily by the National Science Foundation (NSF). Computing and data storage resources, including the Cheyenne supercomputer, were used for the CESM simulations ( https://doi.org/10.5065/D6RX99HX ). H. Annamalai is supported by an NSF project under Grant 1460742. A. Capotondi was supported by DOE Award \#DE‐SC0023228. Lawrence Livermore National Laboratory is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE‐AC52‐07NA27344. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the data and providing access, and the multiple funding agencies who support CMIP6 and ESGF. Funding Information: Portions of this study were supported by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the U.S. Department of Energy's Office of Biological and Environmental Research (BER) under Award Number DE-SC0022070. This work also was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation (NSF) under Cooperative Agreement No. 1852977. The Energy Exascale Earth System Model (E3SM) project is funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER). E3SM production simulations were performed on a high-performance computing cluster provided by the BER Earth System Modeling program and operated by the Laboratory Computing Resource Center at Argonne National Laboratory. Developmental simulations, as well as post-processing and data archiving of production simulations used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The CESM project is supported primarily by the National Science Foundation (NSF). Computing and data storage resources, including the Cheyenne supercomputer, were used for the CESM simulations (https://doi.org/10.5065/D6RX99HX). H. Annamalai is supported by an NSF project under Grant 1460742. A. Capotondi was supported by DOE Award \#DE-SC0023228. Lawrence Livermore National Laboratory is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE-AC52-07NA27344. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the data and providing access, and the multiple funding agencies who support CMIP6 and ESGF. Publisher Copyright: {\textcopyright} 2023 The Authors.",

year = "2023",

month = sep,

day = "16",

doi = "10.1029/2023GL104313",

language = "English",

volume = "50",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "Wiley-Blackwell",

number = "17",

}

TY - JOUR

T1 - Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2

AU - Meehl, Gerald A.

AU - Shields, Christine A.

AU - Arblaster, Julie M.

AU - Neale, Richard

AU - Hu, Aixue

AU - Annamalai, H.

AU - Golaz, Jean Christophe

AU - Fasullo, John

AU - Rosenbloom, Nan

AU - Van Roekel, Luke

AU - Capotondi, Antonietta

N1 - Funding Information: Portions of this study were supported by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the U.S. Department of Energy's Office of Biological and Environmental Research (BER) under Award Number DE‐SC0022070. This work also was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation (NSF) under Cooperative Agreement No. 1852977. The Energy Exascale Earth System Model (E3SM) project is funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER). E3SM production simulations were performed on a high‐performance computing cluster provided by the BER Earth System Modeling program and operated by the Laboratory Computing Resource Center at Argonne National Laboratory. Developmental simulations, as well as post‐processing and data archiving of production simulations used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. The CESM project is supported primarily by the National Science Foundation (NSF). Computing and data storage resources, including the Cheyenne supercomputer, were used for the CESM simulations ( https://doi.org/10.5065/D6RX99HX ). H. Annamalai is supported by an NSF project under Grant 1460742. A. Capotondi was supported by DOE Award #DE‐SC0023228. Lawrence Livermore National Laboratory is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE‐AC52‐07NA27344. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the data and providing access, and the multiple funding agencies who support CMIP6 and ESGF. Funding Information: Portions of this study were supported by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the U.S. Department of Energy's Office of Biological and Environmental Research (BER) under Award Number DE-SC0022070. This work also was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation (NSF) under Cooperative Agreement No. 1852977. The Energy Exascale Earth System Model (E3SM) project is funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER). E3SM production simulations were performed on a high-performance computing cluster provided by the BER Earth System Modeling program and operated by the Laboratory Computing Resource Center at Argonne National Laboratory. Developmental simulations, as well as post-processing and data archiving of production simulations used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The CESM project is supported primarily by the National Science Foundation (NSF). Computing and data storage resources, including the Cheyenne supercomputer, were used for the CESM simulations (https://doi.org/10.5065/D6RX99HX). H. Annamalai is supported by an NSF project under Grant 1460742. A. Capotondi was supported by DOE Award #DE-SC0023228. Lawrence Livermore National Laboratory is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE-AC52-07NA27344. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the data and providing access, and the multiple funding agencies who support CMIP6 and ESGF. Publisher Copyright: © 2023 The Authors.

PY - 2023/9/16

Y1 - 2023/9/16

N2 - The effects of differences in climate base state are related to processes associated with the present-day South Asian monsoon simulations in the Energy Exascale Earth System Model version 2 (E3SMv2) and the Community Earth System Model version 2 (CESM2). Though tropical Pacific and Indian Ocean base state sea surface temperatures (SSTs) are over 1°C cooler in E3SMv2 compared to CESM2, and there is an overall reduction of Indian sector precipitation, the pattern of South Asian monsoon precipitation is similar in the two models. Monsoon-ENSO teleconnections, dynamically linked by the large-scale east-west atmospheric circulation, are reduced in E3SMv2 compared to CESM2. In E3SMv2, this is related to cooler tropical SSTs and ENSO amplitude that is less than half that in CESM2. Comparison to a tropical Pacific pacemaker experiment shows, to a first order, that the base state SSTs and ENSO amplitude contribute roughly equally to lower amplitude monsoon-ENSO teleconnections in E3SMv2.

AB - The effects of differences in climate base state are related to processes associated with the present-day South Asian monsoon simulations in the Energy Exascale Earth System Model version 2 (E3SMv2) and the Community Earth System Model version 2 (CESM2). Though tropical Pacific and Indian Ocean base state sea surface temperatures (SSTs) are over 1°C cooler in E3SMv2 compared to CESM2, and there is an overall reduction of Indian sector precipitation, the pattern of South Asian monsoon precipitation is similar in the two models. Monsoon-ENSO teleconnections, dynamically linked by the large-scale east-west atmospheric circulation, are reduced in E3SMv2 compared to CESM2. In E3SMv2, this is related to cooler tropical SSTs and ENSO amplitude that is less than half that in CESM2. Comparison to a tropical Pacific pacemaker experiment shows, to a first order, that the base state SSTs and ENSO amplitude contribute roughly equally to lower amplitude monsoon-ENSO teleconnections in E3SMv2.

KW - CESM2

KW - E3SMv2

KW - ENSO

KW - global coupled Earth system modeling

KW - Indian monsoon

KW - South Asian monsoon

UR - https://www.scopus.com/pages/publications/85170646664

U2 - 10.1029/2023GL104313

DO - 10.1029/2023GL104313

M3 - Article

AN - SCOPUS:85170646664

SN - 0094-8276

VL - 50

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 17

M1 - e2023GL104313

ER -

Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2

Abstract

UN SDGs

Keywords

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ARC Centre of Excellence for Climate Extremes

Cite this

Climate Base State Influences on South Asian Monsoon Processes Derived From Analyses of E3SMv2 and CESM2

Abstract

UN SDGs

Keywords

Access to Document

Other files and links

Projects

ARC Centre of Excellence for Climate Extremes

Cite this