Impacts of a GCM's resolution on MJO simulation

Xiaolong Jia, Chongyin Li, Jian Ling, Chidong Zhang

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Long-term integrations are conducted using the Spectral Atmospheric Model (referred to as SAMIL), which was developed in the Laboratory for Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) in the Institute of Atmospheric Physics (IAP), with different resolutions to investigate sensitivity of the Madden-Julian Oscillation (MJO) simulations to the model's resolution (horizontal and vertical). Three resolutions of the model, R15L9, R42L9 and R42L26, with identical physical processes, all produced the basic observed features of the MJO, including the spatiotemporal space-time spectra and eastward propagation. No fundamental differences among these simulations were found. This indicates that the model resolution is not a determining factor for simulating the MJO. Detailed differences among these modeling results suggest, however, that model resolution can substantially affect the simulated MJO in certain aspects. For instance, at a lower horizontal resolution, high frequency disturbances were weaker and the structures of the simulated MJO were better defined to a certain extent. A higher vertical resolution led to a more realistic spatiotemporal spectrum and spatial distribution of MJO precipitation. Meanwhile, increasing the model's resolution improved simulation of the climatology. However, increasing the resolution should be based on improving the cumulus parameterization scheme.

Original languageEnglish (US)
Pages (from-to)139-156
Number of pages18
JournalAdvances in Atmospheric Sciences
Volume25
Issue number1
DOIs
StatePublished - Jan 2008

Fingerprint

Madden-Julian oscillation
general circulation model
simulation
fluid dynamics
cumulus
climatology
modeling
parameterization
spatial distribution
disturbance

Keywords

  • GCM
  • MJO
  • Model resolution
  • Simulation

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Impacts of a GCM's resolution on MJO simulation. / Jia, Xiaolong; Li, Chongyin; Ling, Jian; Zhang, Chidong.

In: Advances in Atmospheric Sciences, Vol. 25, No. 1, 01.2008, p. 139-156.

Research output: Contribution to journalArticle

Jia, Xiaolong ; Li, Chongyin ; Ling, Jian ; Zhang, Chidong. / Impacts of a GCM's resolution on MJO simulation. In: Advances in Atmospheric Sciences. 2008 ; Vol. 25, No. 1. pp. 139-156.
@article{76a19aa1d78e4e55b393e3a930462176,
title = "Impacts of a GCM's resolution on MJO simulation",
abstract = "Long-term integrations are conducted using the Spectral Atmospheric Model (referred to as SAMIL), which was developed in the Laboratory for Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) in the Institute of Atmospheric Physics (IAP), with different resolutions to investigate sensitivity of the Madden-Julian Oscillation (MJO) simulations to the model's resolution (horizontal and vertical). Three resolutions of the model, R15L9, R42L9 and R42L26, with identical physical processes, all produced the basic observed features of the MJO, including the spatiotemporal space-time spectra and eastward propagation. No fundamental differences among these simulations were found. This indicates that the model resolution is not a determining factor for simulating the MJO. Detailed differences among these modeling results suggest, however, that model resolution can substantially affect the simulated MJO in certain aspects. For instance, at a lower horizontal resolution, high frequency disturbances were weaker and the structures of the simulated MJO were better defined to a certain extent. A higher vertical resolution led to a more realistic spatiotemporal spectrum and spatial distribution of MJO precipitation. Meanwhile, increasing the model's resolution improved simulation of the climatology. However, increasing the resolution should be based on improving the cumulus parameterization scheme.",
keywords = "GCM, MJO, Model resolution, Simulation",
author = "Xiaolong Jia and Chongyin Li and Jian Ling and Chidong Zhang",
year = "2008",
month = "1",
doi = "10.1007/s00376-008-0139-9",
language = "English (US)",
volume = "25",
pages = "139--156",
journal = "Advances in Atmospheric Sciences",
issn = "0256-1530",
publisher = "Science Press",
number = "1",

}

TY - JOUR

T1 - Impacts of a GCM's resolution on MJO simulation

AU - Jia, Xiaolong

AU - Li, Chongyin

AU - Ling, Jian

AU - Zhang, Chidong

PY - 2008/1

Y1 - 2008/1

N2 - Long-term integrations are conducted using the Spectral Atmospheric Model (referred to as SAMIL), which was developed in the Laboratory for Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) in the Institute of Atmospheric Physics (IAP), with different resolutions to investigate sensitivity of the Madden-Julian Oscillation (MJO) simulations to the model's resolution (horizontal and vertical). Three resolutions of the model, R15L9, R42L9 and R42L26, with identical physical processes, all produced the basic observed features of the MJO, including the spatiotemporal space-time spectra and eastward propagation. No fundamental differences among these simulations were found. This indicates that the model resolution is not a determining factor for simulating the MJO. Detailed differences among these modeling results suggest, however, that model resolution can substantially affect the simulated MJO in certain aspects. For instance, at a lower horizontal resolution, high frequency disturbances were weaker and the structures of the simulated MJO were better defined to a certain extent. A higher vertical resolution led to a more realistic spatiotemporal spectrum and spatial distribution of MJO precipitation. Meanwhile, increasing the model's resolution improved simulation of the climatology. However, increasing the resolution should be based on improving the cumulus parameterization scheme.

AB - Long-term integrations are conducted using the Spectral Atmospheric Model (referred to as SAMIL), which was developed in the Laboratory for Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) in the Institute of Atmospheric Physics (IAP), with different resolutions to investigate sensitivity of the Madden-Julian Oscillation (MJO) simulations to the model's resolution (horizontal and vertical). Three resolutions of the model, R15L9, R42L9 and R42L26, with identical physical processes, all produced the basic observed features of the MJO, including the spatiotemporal space-time spectra and eastward propagation. No fundamental differences among these simulations were found. This indicates that the model resolution is not a determining factor for simulating the MJO. Detailed differences among these modeling results suggest, however, that model resolution can substantially affect the simulated MJO in certain aspects. For instance, at a lower horizontal resolution, high frequency disturbances were weaker and the structures of the simulated MJO were better defined to a certain extent. A higher vertical resolution led to a more realistic spatiotemporal spectrum and spatial distribution of MJO precipitation. Meanwhile, increasing the model's resolution improved simulation of the climatology. However, increasing the resolution should be based on improving the cumulus parameterization scheme.

KW - GCM

KW - MJO

KW - Model resolution

KW - Simulation

UR - http://www.scopus.com/inward/record.url?scp=46749105965&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46749105965&partnerID=8YFLogxK

U2 - 10.1007/s00376-008-0139-9

DO - 10.1007/s00376-008-0139-9

M3 - Article

AN - SCOPUS:46749105965

VL - 25

SP - 139

EP - 156

JO - Advances in Atmospheric Sciences

JF - Advances in Atmospheric Sciences

SN - 0256-1530

IS - 1

ER -