Theoretical and Applied Climatology

, Volume 113, Issue 1–2, pp 329–336

Impact of Northwest Pacific anticyclone on the Indian summer monsoon region

  • J. S. Chowdary
  • C. Gnanaseelan
  • Soumi Chakravorty
Original Paper

Abstract

Influence of northwest (NW) Pacific anticyclone on the Indian summer monsoon (ISM), particularly over the head Bay of Bengal and monsoon trough region, is investigated. Strong NW Pacific anticyclone during summer induces negative precipitation anomalies over the head Bay of Bengal and Gangetic Plain region. Westward extension of moisture divergence and dry moisture transport from NW Pacific associated with anticyclone (ridge) and local Hadley cell-induced subsidence are responsible for these negative precipitation anomalies. The impact is maximum when the anticyclone and Indian Ocean basin warming co-occur. This contributes significantly to year-to-year variability of ISM.

References

  1. Alexander MA, Bladé I, Newman M, Lanzante JR, Lau NC, Scott JD (2002) The atmospheric bridge: the influence of ENSO teleconnections on air–sea interaction over the global oceans. J Climate 15:2205–2231CrossRefGoogle Scholar
  2. Chakravorty S, Chowdary JS, Gnanaseelan C (2012) Spring asymmetric mode in the tropical Indian Ocean: Role of El Niño and IOD. Clim Dyn. doi:10.1007/s00382-012-1340-1
  3. Chowdary JS, Xie SP, Lee JY, Kosaka Y, Wang B (2010) Predictability of summer Northwest Pacific climate in eleven coupled model hindcasts: local and remote forcing. J Geophys Res 115:D22121. doi:10.1029/2010JD014595 CrossRefGoogle Scholar
  4. Chowdary JS, Xie SP, Luo JJ, Hafner J, Behera S, Masumoto Y, Yamagata T (2011) Predictability of Northwest Pacific climate during summer and the role of the tropical Indian Ocean. Clim Dyn 36:607–621. doi:10.1007/s00382-009-0686-5 CrossRefGoogle Scholar
  5. Dee DP et al (2011) The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Q J Roy Met Soc 137:553–597CrossRefGoogle Scholar
  6. Du Y, Xie SP, Huang G, Hu KM (2009) Role of air–sea interaction in the long persistence of El Niño-induced North Indian Ocean warming. J Climate 22:2023–2038CrossRefGoogle Scholar
  7. Klein SA, Soden BJ, Lau NC (1999) Remote sea surface temperature variations during ENSO: evidence for a tropical atmospheric bridge. J Climate 12:917–932CrossRefGoogle Scholar
  8. Lau NC, Nath MJ (2003) Atmosphere–ocean variations in the Indo-Pacific sector during ENSO episodes. J Climate 16:3–20CrossRefGoogle Scholar
  9. Lu R, Dong BW (2001) Westward extension of North Pacific subtropical high in summer. J Met Soc Japan 79:1229–1241CrossRefGoogle Scholar
  10. Mishra V, Smoliak BV, Lettenmaier DP, Wallace JM (2012) A prominent pattern of year-to-year variability in Indian Summer Monsoon Rainfall. PNAS. doi:10.1073/pnas.1119150109
  11. Park HS, Chiang JCH, Lintner BR, Zhang GJ (2010) The delayed effect of major El Niño events on Indian monsoon rainfall. J Climate 23:932–946CrossRefGoogle Scholar
  12. Rajeevan M, Bhate J, Kale JD, Lal B (2006) A high-resolution daily gridded rainfall for the Indian region: analysis of break and active monsoon spells. Curr Sci 91:296–306Google Scholar
  13. Saji NH, Goswami BN, Vinayachandran PN, Yamagata T (1999) A dipole mode in the tropical Indian ocean. Nature 401:360–363Google Scholar
  14. Smith TM, Reynolds RW (2004) Improved extended reconstruction of SST (1854–1997). J Climate 17:2466–2477CrossRefGoogle Scholar
  15. Wang B, Wu R, Fu X (2000) Pacific-East Asian teleconnection: how does ENSO affect east Asian climate? J Climate 13:1517–1536CrossRefGoogle Scholar
  16. Xie P, Arkin PA (1997) Global precipitation: a 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs. Bull Am Meteorol Soc 78:2539–2558CrossRefGoogle Scholar
  17. Xie SP, Hu K, Hafner J, Tokinaga H, Du Y, Huang G, Sampe T (2009) Indian Ocean capacitor effect on Indo-western Pacific climate during the summer following El Niño. J Climate 22:730–747CrossRefGoogle Scholar
  18. Yang J, Liu Q, Xie SP, Liu Z, Wu L (2007) Impact of the Indian Ocean SST basin mode on the Asian summer monsoon. J Geophys Res 34:L02708. doi:10.1029/2006GL028571 Google Scholar
  19. Zhang R, Sumi A, Kimoto M (1996) Impacts of El Niño on the East Asian monsoon: a diagnostic study of the '86/87 and '91/92 events. J Met Soc Japan 74:49–62Google Scholar

Copyright information

© Springer-Verlag Wien 2012

Authors and Affiliations

  • J. S. Chowdary
    • 1
  • C. Gnanaseelan
    • 1
  • Soumi Chakravorty
    • 1
  1. 1.Indian Institute of Tropical MeteorologyPuneIndia

Personalised recommendations