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Climate Dynamics

, Volume 51, Issue 11–12, pp 4185–4205 | Cite as

Intraseasonal oscillations in East Asian and South Asian monsoons

  • V. Krishnamurthy
Article

Abstract

This study has investigated the relation between the East Asian monsoon and the South Asian monsoon at intraseasonal time scale during the boreal summer. Applying a data adaptive method on daily anomalies of precipitation, two leading intraseasonal oscillations (ISOs) were extracted separately in the regions of South Asia, tropical East Asia and subtropical East Asia. The first ISO has a period of about 45 days and propagates northward and eastward over the South Asian and tropical East Asian regions. The second ISO, with a period of about 26 days, propagates northeastward over South Asia and northwestward over tropical East Asia. Although both the ISOs are also present over the subtropical East Asia, the variance is low while no propagation is evident. The circulation patterns associated with the ISOs were found to be consistent with the corresponding precipitation patterns of the ISOs. The two ISOs also reveal consistency with the space–time evolution of diabatic heating, convection, vertical motion, upper-level divergence and moisture transport. The zonal and meridional propagation of the ISOs provide a strong link between the South Asian monsoon and East Asian monsoon regions. The subtropical East Asian region seems to have a weaker link with the other monsoon regions.

Keywords

East Asian monsoon South Asian monsoon Intraseasonal oscillations Zonal and meridional propagation 

Notes

Acknowledgements

This work was supported by National Science Foundation (Grants 0830068, 1338427), National Oceanic and Atmospheric Administration (Grants NA09OAR4310058, NA14OAR4310160), and National Aeronautics and Space Administration (Grants NNX09AN50G, NNX14AM19G).

References

  1. Allen MR, Robertson AW (1996) Distinguishing modulated oscillations from coloured noise in multivariate datasets. Clim Dyn 12:775–784CrossRefGoogle Scholar
  2. Allen MR, Smith LA (1996) Monte Carlo SSA: detecting irregular oscillations in the presence of colored noise. J Clim 9:3373–3404CrossRefGoogle Scholar
  3. Annamalai H, Sperber KR (2005) Regional heat sources and the active and break phases of boreal summer intraseasonal (30–50 day) variability. J Atmos Sci 62:2726–2748CrossRefGoogle Scholar
  4. Broomhead DS, King GP (1986) Extracting qualitative dynamics from experimental data. Phys D 20:217–236CrossRefGoogle Scholar
  5. Chen T-C, Murakami M (1988) The 30–50 day variation of convective activity over the western Pacific Ocean with emphasis on the northwestern region. Mon Weather Rev 116:892–906CrossRefGoogle Scholar
  6. Chen T-C, Yen M-C, Weng S-P (2000) Interaction between the summer monsoons in East Asia and South China Sea: intraseasonal monsoon modes. J Atmos Sci 57:1373–1392CrossRefGoogle Scholar
  7. Dee DP et al (2011) The ERA-Interim re-analysis: configuration and performance of the data assimilation system. Quart J R Meteorl Soc 137:553–597CrossRefGoogle Scholar
  8. Ding Y, Chan JCL (2005) The East Asian summer monsoon: an overview. Meteorol Atmos Phys 89:117–142CrossRefGoogle Scholar
  9. Fukutomi Y, Yasunari T (1999) 10–25 day intraseasonal variations of convection and circulation over East Asia and western North Pacific during early summer. J Meteorol Soc Jpn 77:753–769CrossRefGoogle Scholar
  10. Ghil M, Allen MR, Dettinger MD, Ide K, Kondrashov KD, Mann ME, Robertson AW, Saunders A, Tian Y, Varadi F, Yiou P (2002) Advanced spectral methods for climatic time series. Rev Geophys 40(1):1003. doi: 10.1029/2000RG000092 CrossRefGoogle Scholar
  11. Hazra A, Krishnamurthy V (2015) Space-time structure of diabatic heating in monsoon intraseasonal oscillation. J Clim 28:2234–2255CrossRefGoogle Scholar
  12. Hsu H-H (2005) East Asian monsoon. In: Lau WKM, Waliser DE (eds) Intraseasonal variability in the atmosphere-ocean climate system. Praxis, Chichester, pp 63–94CrossRefGoogle Scholar
  13. Hsu H-H, Weng C-H (2001) Northwestward propagation of the intraseasonal oscillation in the western north Pacific during the boreal summer: structure and mechanisms. J Clim 14:3834–3850CrossRefGoogle Scholar
  14. Huffman GJ, Adler RF, Bolvin DT, Gu G, Nelkin EJ, Bowman KP, Hong Y, Stocker EF, Wolff DB (2007) The TRMM multisatellite precipitation analysis (TMPA): quasi-global, multi-year, combined-sensor precipitation estimates at fine scales. J Hydrometeorol 8:38–55CrossRefGoogle Scholar
  15. Kawamura R, Murakami T, Wang B (1996) Tropical and mid-latitude 45-day perturbations over the western Pacific during the northern summer. J Meteorol Soc Jpn 74:867–890CrossRefGoogle Scholar
  16. Kripalani RH, Kulkarni A (1997) Rainfall variability over Southeast Asia—connections with Indian monsoon and ENSO extremes: new perspectives. Int J Climatol 17:1155–1168CrossRefGoogle Scholar
  17. Kripalani RH, Kulkarni A (2001) Monsoon rainfall variations and teleconnections over South and East Asia. Int J Climatol 21:603–616CrossRefGoogle Scholar
  18. Kripalani RH, Singh SV, Arkin PA (1991) Large-scale features of rainfall and outgoing longwave radiation over Indian and adjoining regions. Beitr Phys Atmosph 64:159–168Google Scholar
  19. Krishnamurthy V, Achuthavarier D (2012) Intraseasonal oscillations of the monsoon circulation over South Asia. Clim Dyn 38:2335–2353CrossRefGoogle Scholar
  20. Krishnamurthy V, Kinter JL III (2003) The Indian monsoon and its relation to global climate variability. In: Rodó X, Comín FA (eds) Global climate. Springer, Berlin, pp 186–236CrossRefGoogle Scholar
  21. Krishnamurthy V, Kirtman BP (2009) Relation between Indian monsoon variability and SST. J Clim 22:4437–4458CrossRefGoogle Scholar
  22. Krishnamurthy V, Shukla J (2000) Intraseasonal and interannual variability of rainfall over India. J Clim 13:4366–4377CrossRefGoogle Scholar
  23. Krishnamurthy V, Shukla J (2007) Intraseasonal and seasonally persisting patterns of Indian monsoon rainfall. J Clim 20:3–20CrossRefGoogle Scholar
  24. Krishnamurthy V, Shukla J (2008) Seasonal persistence and propagation of intraseasonal patterns over the Indian monsoon region. Clim Dyn 30:353–369CrossRefGoogle Scholar
  25. Lau K-M, Chan PH (1986) Aspects of the 40–50 day oscillation during the northern summer as inferred from outgoing longwave radiation. Mon Weather Rev 114:1354–1367CrossRefGoogle Scholar
  26. Liebmann B, Smith CA (1996) Description of a complete (interpolated) outgoing longwave radiation dataset. Bull Am Soc 77:1275–1277Google Scholar
  27. Moron V, Vautard R, Ghil M (1998) Trends, interdecadal and interannual oscillations in global sea-surface temperatures. Clim Dyn 14:545–569CrossRefGoogle Scholar
  28. Nakazawa T (1986) Intraseasonal variations of OLR in the tropics during the FGGE year. J Meteorol Soc Jpn 64:17–34CrossRefGoogle Scholar
  29. Plaut G, Vautard R (1994) Spells of low-frequency oscillations and weather regimes in the northern hemisphere. J Atmos Sci 51:210–236CrossRefGoogle Scholar
  30. Reynolds RW, Smith TM, Liu C, Chelton DB, Casey KS, Schlax MG (2007) Daily high-resolution-blended analyses for sea surface temperature. J Clim 20:5473–5496CrossRefGoogle Scholar
  31. Roxy M, Tanimoto Y, Preethi B, Terray P, Krishnan R (2013) Intraseasonal SST-precipitation relationship and its spatial variability over the tropical summer monsoon region. Clim Dyn 41:45–61CrossRefGoogle Scholar
  32. Wang B, Lin H (2002) Rainy season of the Asian-Pacific summer monsoon. J Clim 15:386–396CrossRefGoogle Scholar
  33. Wang B, Xu X (1997) Northern Hemisphere summer monsoon singularities and climatological intraseasonal oscillation. J Clim 10:1071–1085CrossRefGoogle Scholar
  34. Wang B, Clemens SC, Liu P (2003) Contrasting the Indian and East Asian monsoons: implications on geologic timescales. Mar Geol 201:5–21CrossRefGoogle Scholar
  35. Wang B, Li T, Ding Y, Zhang R, Wang H (2005) East Asian-Western North Pacific monsoon: A distinctive component of the Asian-Australian monsoon system. In: Chang C-P, Wang B, Lau N-CG (eds) The global monsoon system: research and forecast, WMO/TD no. 1266. World Meteorological Organization, Geneva, pp 71–94Google Scholar
  36. Yanai M, Chu J-H, Stark TE, Nitta T (1976) Response of deep and shallow tropical maritime cumuli to large scale processes. J Atmos Sci 33:976–991CrossRefGoogle Scholar
  37. Yasunari T (1979) Cloudiness fluctuations associated with the northern hemisphere summer monsoon. J Meteorol Soc Jpn 57:227–242CrossRefGoogle Scholar
  38. Ye K, Wu R (2015) Contrast of local air-sea relationships between 10–20-day and 30–60-day intraseasonal oscillations during May–September over the South China Sea and western North Pacific. Clim Dyn 45:3441–3459CrossRefGoogle Scholar
  39. Zhu B, Wang B (1993) The 30–60 day convection seesaw between the tropical Indian and western Pacific Oceans. J Atmos Sci 50:184–199CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Center for Ocean-Land-Atmosphere Studies, MS 6C5, Research HallGeorge Mason UniversityFairfaxUSA

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