A GCM with cloud microphysics and its MJO simulation

In Sik Kang; Min Seop Ahn; Young Min Yang

doi:10.1186/s40562-016-0048-1

A GCM with cloud microphysics and its MJO simulation

In Sik Kang^*
, Min Seop Ahn
, Young Min Yang

^*Corresponding author for this work

Environmental Engineering

Seoul National University
King Abdulaziz University
University of Hawai'i at Mānoa

Research output: Contribution to journal › Journal article › peer-review

6 Scopus citations

Abstract

The present study examines the Madden and Julian oscillation (MJO) appearing in a general circulation model (GCM) with full representation of cloud microphysics at 50 km horizontal resolution, and the MJO is compared with those of GCMs with conventional convective parameterizations. The present coarse-resolution GCM requires modifications of several parameters of cloud microphysics and an additional vertical mixing process in the lower troposphere to simulate the MJO reasonably well. The GCM with cloud microphysics only produces the relatively small-scale precipitation scattered in the tropic. The shallow convection added in the GCM helps moisten the lower troposphere and enhances low-level moisture convergence, and thus large-scale cloud clusters are generated effectively, resulting in a better simulation of MJO.

Original language	English
Article number	16
Journal	Geoscience Letters
Volume	3
Issue number	1
DOIs	https://doi.org/10.1186/s40562-016-0048-1
State	Published - 2016.12.1

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10.1186/s40562-016-0048-1

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title = "A GCM with cloud microphysics and its MJO simulation",

abstract = "The present study examines the Madden and Julian oscillation (MJO) appearing in a general circulation model (GCM) with full representation of cloud microphysics at 50 km horizontal resolution, and the MJO is compared with those of GCMs with conventional convective parameterizations. The present coarse-resolution GCM requires modifications of several parameters of cloud microphysics and an additional vertical mixing process in the lower troposphere to simulate the MJO reasonably well. The GCM with cloud microphysics only produces the relatively small-scale precipitation scattered in the tropic. The shallow convection added in the GCM helps moisten the lower troposphere and enhances low-level moisture convergence, and thus large-scale cloud clusters are generated effectively, resulting in a better simulation of MJO.",

author = "Kang, \{In Sik\} and Ahn, \{Min Seop\} and Yang, \{Young Min\}",

note = "Publisher Copyright: {\textcopyright} 2016, The Author(s).",

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doi = "10.1186/s40562-016-0048-1",

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T1 - A GCM with cloud microphysics and its MJO simulation

AU - Kang, In Sik

AU - Ahn, Min Seop

AU - Yang, Young Min

PY - 2016/12/1

Y1 - 2016/12/1

N2 - The present study examines the Madden and Julian oscillation (MJO) appearing in a general circulation model (GCM) with full representation of cloud microphysics at 50 km horizontal resolution, and the MJO is compared with those of GCMs with conventional convective parameterizations. The present coarse-resolution GCM requires modifications of several parameters of cloud microphysics and an additional vertical mixing process in the lower troposphere to simulate the MJO reasonably well. The GCM with cloud microphysics only produces the relatively small-scale precipitation scattered in the tropic. The shallow convection added in the GCM helps moisten the lower troposphere and enhances low-level moisture convergence, and thus large-scale cloud clusters are generated effectively, resulting in a better simulation of MJO.

AB - The present study examines the Madden and Julian oscillation (MJO) appearing in a general circulation model (GCM) with full representation of cloud microphysics at 50 km horizontal resolution, and the MJO is compared with those of GCMs with conventional convective parameterizations. The present coarse-resolution GCM requires modifications of several parameters of cloud microphysics and an additional vertical mixing process in the lower troposphere to simulate the MJO reasonably well. The GCM with cloud microphysics only produces the relatively small-scale precipitation scattered in the tropic. The shallow convection added in the GCM helps moisten the lower troposphere and enhances low-level moisture convergence, and thus large-scale cloud clusters are generated effectively, resulting in a better simulation of MJO.

UR - https://www.scopus.com/pages/publications/85018503752

U2 - 10.1186/s40562-016-0048-1

DO - 10.1186/s40562-016-0048-1

M3 - Journal article

AN - SCOPUS:85018503752

SN - 2196-4092

VL - 3

JO - Geoscience Letters

JF - Geoscience Letters

IS - 1

M1 - 16

ER -

A GCM with cloud microphysics and its MJO simulation

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