Climate Dynamics

, 33:1051

The CLIVAR C20C project: which components of the Asian–Australian monsoon circulation variations are forced and reproducible?

  • Tianjun Zhou
  • Bo Wu
  • A. A. Scaife
  • S. Brönnimann
  • A. Cherchi
  • D. Fereday
  • A. M. Fischer
  • C. K. Folland
  • K. E. Jin
  • J. Kinter
  • J. R. Knight
  • F. Kucharski
  • S. Kusunoki
  • N.-C. Lau
  • Lijuan Li
  • M. J. Nath
  • T. Nakaegawa
  • A. Navarra
  • P. Pegion
  • E. Rozanov
  • S. Schubert
  • P. Sporyshev
  • A. Voldoire
  • Xinyu Wen
  • J. H. Yoon
  • N. Zeng
Article

DOI: 10.1007/s00382-008-0501-8

Cite this article as:
Zhou, T., Wu, B., Scaife, A.A. et al. Clim Dyn (2009) 33: 1051. doi:10.1007/s00382-008-0501-8
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Abstract

A multi-model set of atmospheric simulations forced by historical sea surface temperature (SST) or SSTs plus Greenhouse gases and aerosol forcing agents for the period of 1950–1999 is studied to identify and understand which components of the Asian–Australian monsoon (A–AM) variability are forced and reproducible. The analysis focuses on the summertime monsoon circulations, comparing model results against the observations. The priority of different components of the A–AM circulations in terms of reproducibility is evaluated. Among the subsystems of the wide A–AM, the South Asian monsoon and the Australian monsoon circulations are better reproduced than the others, indicating they are forced and well modeled. The primary driving mechanism comes from the tropical Pacific. The western North Pacific monsoon circulation is also forced and well modeled except with a slightly lower reproducibility due to its delayed response to the eastern tropical Pacific forcing. The simultaneous driving comes from the western Pacific surrounding the maritime continent region. The Indian monsoon circulation has a moderate reproducibility, partly due to its weakened connection to June–July–August SSTs in the equatorial eastern Pacific in recent decades. Among the A–AM subsystems, the East Asian summer monsoon has the lowest reproducibility and is poorly modeled. This is mainly due to the failure of specifying historical SST in capturing the zonal land-sea thermal contrast change across the East Asia. The prescribed tropical Indian Ocean SST changes partly reproduce the meridional wind change over East Asia in several models. For all the A–AM subsystem circulation indices, generally the MME is always the best except for the Indian monsoon and East Asian monsoon circulation indices.

Keywords

CLIVAR C20CAsian–Australian monsoon circulationAGCMReproducibility

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Tianjun Zhou
    • 1
  • Bo Wu
    • 1
    • 2
  • A. A. Scaife
    • 3
  • S. Brönnimann
    • 4
  • A. Cherchi
    • 5
  • D. Fereday
    • 3
  • A. M. Fischer
    • 4
  • C. K. Folland
    • 3
  • K. E. Jin
    • 7
  • J. Kinter
    • 7
  • J. R. Knight
    • 3
  • F. Kucharski
    • 6
  • S. Kusunoki
    • 9
  • N.-C. Lau
    • 8
  • Lijuan Li
    • 1
  • M. J. Nath
    • 8
  • T. Nakaegawa
    • 9
  • A. Navarra
    • 5
  • P. Pegion
    • 10
  • E. Rozanov
    • 4
    • 11
  • S. Schubert
    • 10
  • P. Sporyshev
    • 12
  • A. Voldoire
    • 13
  • Xinyu Wen
    • 1
    • 14
  • J. H. Yoon
    • 15
  • N. Zeng
    • 15
  1. 1.LASG, Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina
  2. 2.Graduate University of Chinese Academy of SciencesBeijingChina
  3. 3.Met Office Hadley CentreExeterUK
  4. 4.Institute for Atmospheric and Climate ScienceETHZurichSwitzerland
  5. 5.Centro Euromediterraneo per i Cambiamenti Climatici, Istituto Nazionale di Geofisica e VulcanologiaBolognaItaly
  6. 6.Abdus Salam International Center for Theoretical PhysicsTriesteItaly
  7. 7.Centre for Ocean-Land-Atmosphere StudiesCalvertonUSA
  8. 8.Geophysical Fluid Dynamics LaboratoryNOAAPrincetonUSA
  9. 9.Meteorological Research InstituteJapan Meteorological AgencyTsukubaJapan
  10. 10.NASA Goddard Space Flight CenterGreenbeltUSA
  11. 11.Physical-Meteorological ObservatoryWorld Radiation CenterDavosSwitzerland
  12. 12.Voeikov Main Geophysical ObservatorySt PetersburgRussia
  13. 13.CNRM, Meteo FranceToulouse Cedex 1France
  14. 14.Department of Atmospheric SciencesBeijing UniversityBeijingChina
  15. 15.University of MarylandBaltimoreUSA