Climate Dynamics

, Volume 33, Issue 5, pp 615–627

The CLIVAR C20C project: skill of simulating Indian monsoon rainfall on interannual to decadal timescales. Does GHG forcing play a role?

  • F. Kucharski
  • A. A. Scaife
  • J. H. Yoo
  • C. K. Folland
  • J. Kinter
  • J. Knight
  • D. Fereday
  • A. M. Fischer
  • E. K. Jin
  • J. Kröger
  • N.-C. Lau
  • T. Nakaegawa
  • M. J. Nath
  • P. Pegion
  • E. Rozanov
  • S. Schubert
  • P. V. Sporyshev
  • J. Syktus
  • A. Voldoire
  • J. H. Yoon
  • N. Zeng
  • T. Zhou
Article

DOI: 10.1007/s00382-008-0462-y

Cite this article as:
Kucharski, F., Scaife, A.A., Yoo, J.H. et al. Clim Dyn (2009) 33: 615. doi:10.1007/s00382-008-0462-y

Abstract

The ability of atmospheric general circulation models (AGCMs), that are forced with observed sea surface temperatures (SSTs), to simulate the Indian monsoon rainfall (IMR) variability on interannual to decadal timescales is analyzed in a multimodel intercomparison. The multimodel ensemble has been performed within the CLIVAR International “Climate of the 20th Century” (C20C) Project. This paper is part of a C20C intercomparison of key climate time series. Whereas on the interannual timescale there is modest skill in reproducing the observed IMR variability, on decadal timescale the skill is much larger. It is shown that the decadal IMR variability is largely forced, most likely by tropical sea surface temperatures (SSTs), but as well by extratropical and especially Atlantic Multidecadal Oscillation (AMO) related SSTs. In particular there has been a decrease from the late 1950s to the 1990s that corresponds to a general warming of tropical SSTs. Using a selection of control integrations from the World Climate Research Programme’s (WCRP’s) Coupled Model Intercomparison Project phase 3 (CMIP3), it is shown that the increase of greenhouse gases (GHG) in the twentieth century has not significantly contributed to the observed decadal IMR variability.

Keywords

Climate variabilityMultimodel ensemblesIndian monsoonENSO–monsoon relationInterannual-to-decadal predictability

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • F. Kucharski
    • 1
  • A. A. Scaife
    • 2
  • J. H. Yoo
    • 1
  • C. K. Folland
    • 2
  • J. Kinter
    • 3
  • J. Knight
    • 2
  • D. Fereday
    • 2
  • A. M. Fischer
    • 4
  • E. K. Jin
    • 3
    • 5
  • J. Kröger
    • 1
  • N.-C. Lau
    • 6
  • T. Nakaegawa
    • 7
  • M. J. Nath
    • 6
  • P. Pegion
    • 8
  • E. Rozanov
    • 9
  • S. Schubert
    • 8
  • P. V. Sporyshev
    • 10
  • J. Syktus
    • 11
  • A. Voldoire
    • 12
  • J. H. Yoon
    • 13
  • N. Zeng
    • 13
  • T. Zhou
    • 14
  1. 1.Earth System Physics SectionThe Abdus Salam International Centre for Theoretical PhysicsTriesteItaly
  2. 2.Met Office Hadley Centre (MOHC)ExeterUK
  3. 3.Centre for Ocean-Land-Atmosphere StudiesCalvertonUSA
  4. 4.Institute for Atmospheric and Climate ScienceETH ZurichSwitzerland
  5. 5.George Mason UniversityFairfaxUSA
  6. 6.Geophysical Fluid Dynamics LaboratoryPrincetonUSA
  7. 7.Meteorological Research InstituteJapan Meteorological AgencyTokyoJapan
  8. 8.NASA Goddard Space Flight CentreGreenbeltUSA
  9. 9.Physical-Meteorological Observatory/World Radiation CenterDavosSwitzerland
  10. 10.Voeikov Main Geophysical ObservatorySt PetersburgRussia
  11. 11.Queensland Climate Change Centre of ExcellenceBrisbaneAustralia
  12. 12.CNRM/GAME, Meteo-France/CNRSToulouseFrance
  13. 13.University of MarylandCollegeparkUSA
  14. 14.Institute of Atmospheric SciencesLASGBeijingChina