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Climate Dynamics

, Volume 37, Issue 5–6, pp 1045–1060 | Cite as

Circumglobal wave train and the summer monsoon over northwestern India and Pakistan: the explicit role of the surface heat low

  • Sajjad SaeedEmail author
  • Wolfgang A. Müller
  • Stefan Hagemann
  • Daniela Jacob
Article

Abstract

This study examines the influence of the mid-latitude circulation on the surface heat low (HL) and associated monsoon rainfall over northwestern India and Pakistan using the ERA40 data and high resolution (T106L31) climate model ECHAM5 simulation. Special emphasis is given to the surface HL which forms over Pakistan and adjoining areas of India, Iran and Afghanistan during the summer season. A heat low index (HLI) is defined to depict the surface HL. The HLI displays significant correlations with the upper level mid-latitude circulation over western central Asia and low level monsoon circulation over Arabian Sea and acts as a bridge connecting the mid-latitude wave train to the Indian summer monsoon. A time-lagged singular value decomposition analysis reveals that the eastward propagation of the mid-latitude circumglobal wave train (CGT) influences the surface pressure anomalies over the Indian domain. The largest low (negative) pressure anomalies over the western parts of the HL region (i.e., Iran and Afghanistan) occur in conjunction with the upper level anomalous high that develops over western-central Asia during the positive phase of the CGT. The composite analysis also reveals a significant increase in the low pressure anomalies over Iran and Afghanistan during the positive phase of CGT. The westward increasing low pressure anomalies with its north–south orientation provokes enormous north–south pressure gradient (lower pressure over land than over sea). This in turn enables the moist southerly flow from the Arabian Sea to penetrate farther northward over northwestern India and Pakistan. A monsoon trough like conditions develops over northwestern India and Pakistan where the moist southwesterly flow from the Arabian Sea and the Persian Gulf converge. The convergence in association with the orographic uplifting expedites convection and associated precipitation over northwestern India and Pakistan. The high resolution climate model ECHAM5 simulation also underlines the proposed findings and mechanism.

Keywords

Circumglobal wave train Eurasian wave train Heat low Indian summer monsoon 

Notes

Acknowledgments

This study is supported by the International Max Planck Research School on Earth System Modeling, Hamburg, Germany. The study was further supported by the project “Integrated Climate System Analysis and Prediction (CLISAP)”. ERA40 data produced by the European Centre for Medium Range Weather Forecast and the observational precipitation and surface air temperature data assembled by the University of Delaware from Global Historical Climate Network has been used. The authors would like to thank Erich Roeckner and Bjorn Stevens from the Max Planck Institute for Meteorology for their valuable comments and suggestions on the first draft of this manuscript. Finally, the authors would like to sincerely thank the esteemed reviewers for their worthy comments and valuable suggestions which immensely helped us in improving this paper.

References

  1. Ashok K, Guan Z, Yamagata T (2001) Impact of the Indian Ocean dipole on the relationship between the Indian monsoon rainfall and ENSO. Geophys Res Lett 28:4499–4502CrossRefGoogle Scholar
  2. Bansod SD, Singh SV (1995) Pre-monsoon surface pressure and summer monsoon rainfall over India. Theor Appl Climatol 51:59–66CrossRefGoogle Scholar
  3. Bosilovich M, Chen J, Robertson FR, Adler RF (2008) Evaluation of global precipitation in reanalysis. J Appl Meteorol Climatol 47:2279–2299CrossRefGoogle Scholar
  4. Branstator G (2002) Circumglobal teleconnecctions, the jet stream waveguide, and North Atlantic Oscillation. J Clim 15:1893–1910CrossRefGoogle Scholar
  5. Czaja A, Frankignoul C (2002) Observed impact of Atlantic SST anomalies on the North Atlantic Oscillation. J Clim 15:606–623CrossRefGoogle Scholar
  6. Ding Y-H, Sikka DR (2005) Synoptic system and weather in the Asian monsoon. In: Wang B (ed) The Asian monsoon. Springer Praxis, New York, pp 131–201Google Scholar
  7. Ding Q, Wang B (2005) Circumglobal teleconnection in northern hemisphere summer. J Clim 18:3482–3505CrossRefGoogle Scholar
  8. Ding Q, Wang B (2007) Intraseasonal teleconnection between the summer Eurasian wave train and Indian monsoon. J Clim 20:3551–3767CrossRefGoogle Scholar
  9. Fasullo J, Webster PJ (2002) Hydrological signatures relating the Asian summer monsoon and ENSO. J Clim 15:3082–3095CrossRefGoogle Scholar
  10. Goswami BN (1998) Interannual variations of Indian summer monsoon in a GCM: external conditions versus internal feedbacks. J Clim 11:501–522CrossRefGoogle Scholar
  11. Goswami BN, Ajayamohan RS (2001) Intraseasonal oscillations and interannual variability of the Indian summer monsoon. J Clim 14:1180–1198CrossRefGoogle Scholar
  12. Goswami BN, Xavier PK (2005) ENSO control on the South Asian monsoon through the length of the rainy season. Geophys Res Lett 32:L18717. doi: 10.1029/2005GL023216 CrossRefGoogle Scholar
  13. Goswami BN, Madhusoodanan MS, Neema CP, Senguta D (2006) A physical mechanism for North Atlantic SST influence on the Indian summer monsoon. Geophys Res Lett 33:L02706. doi: 10.1029/2005Gl024803 CrossRefGoogle Scholar
  14. Haln DG, Manabe S (1995) The role of mountains in the South Asian monsoon climate. J Atmos Sci 32:1515–1541Google Scholar
  15. Haln DG, Shukla J (1976) An apparent relationship between Eurasian snow cover and Indian monsoon rainfall. J Atmos Sci 33:2461–2462CrossRefGoogle Scholar
  16. Hewitt CN, Jackson A (2003) Hand book of the atmospheric science: principles and applications. Blackwell, Oxford, 81 ppGoogle Scholar
  17. Hoskins BJ, Wang B (2005) Large-scale atmospheric dynamics. In: Wang B (ed) The Asian monsoon. Springer-Praxis, New York, pp 357–415Google Scholar
  18. Kalnay E et al (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteorol Soc 77:437–470CrossRefGoogle Scholar
  19. Kinter JL III, Miyakoda K, Yang S (2002) Recent change in the connection from the Asian monsoon to ENSO. J Clim 15:1203–1215CrossRefGoogle Scholar
  20. Kripalani RH, Kulkarni A, Singh SV (1997) Association of the Indian summer monsoon with the northern hemisphere mid-latitude circulation. Int J Climatol 17:1055–1067CrossRefGoogle Scholar
  21. Krishna Kumar K, Rajagopalan B, Cane MA (1999) On the weakening relationship between the Indian monsoon and ENSO. Science 264:2156–2159CrossRefGoogle Scholar
  22. Krishnamurthy V, Goswami BN (2000) Indian monsoon ENSO relationship on interdecadal timescale. J Clim 13:579–595CrossRefGoogle Scholar
  23. Krishnan R, Kumar V, Sugi M, Yoshimura J, Zhang C, Sugi M (2000) Dynamics of breaks in Indian monsoon. J Atmos Sci 57:1354–1372CrossRefGoogle Scholar
  24. Krishnan R, Kumar V, Sugi M, Yoshimura J (2009) Internal feedbacks from monsoon-mid-latitude interactions during droughts in Indian summer monsoon. J Atmos Sci 66:553–578CrossRefGoogle Scholar
  25. Kucharski F, Bracco A, Yahoo JH, Molten F (2008) Atlantic forced component of the Indian monsoon interannual variability. Geophys Res Lett 35:L04706. doi: 10.1029/2007GL033037 CrossRefGoogle Scholar
  26. Legates DR, Willmott CJ (1990a) Mean seasonal and spatial variability global surface air temperature. Theor Appl Climatol 41:11–21CrossRefGoogle Scholar
  27. Legates DR, Willmott CJ (1990b) Mean seasonal and spatial variability in gauge-corrected, global precipitation. Int J Climatol 10:111–127CrossRefGoogle Scholar
  28. Li S, Perlwitz J, Quan X, Hoerling MP (2008) Modelling the influence of North Atlantic multidecadal warmth on the Indian summer rainfall. Geophys Res Lett 35:L05804. doi: 10.1029/2007GL032901 CrossRefGoogle Scholar
  29. Meehl GA (1994) Influence of land surface in the Asian summer monsoon: external conditions versus internal feedbacks. J Clim 7:1033–1049CrossRefGoogle Scholar
  30. Park CK, Schubert SD (1997) On the nature of the 1994 East Asia summer drought. J Clim 10:1056–1070CrossRefGoogle Scholar
  31. Ramage CS (1965) The summer atmospheric circulation over the Arabian Sea. J Atmos Sci 23:144–150CrossRefGoogle Scholar
  32. Ramage CS (1971) Monsoon meteorology. Academic Press, New York, 296 ppGoogle Scholar
  33. Raman CRV, Rao YP (1981) Blocking highs over Asia and monsoon droughts over India. Nature 289:271–273CrossRefGoogle Scholar
  34. Ramaswamy C (1962) Breaks in the Indian summer monsoon as a phenomenon of interaction between the easterly and subtropical westerly jet streams. Tellus 14A:337–349CrossRefGoogle Scholar
  35. Rasmusson EM, Carpenter TH (1983) The relationship between the eastern Pacific sea surface temperature and rainfall over India and Sri Lanka. Mon Weather Rev 111:517–528CrossRefGoogle Scholar
  36. Roeckner E et al (2003) The atmospheric general circulation model ECHAM5. Part I: model description. Max Planck Institute for Meteorology, Rep. 349, 127 ppGoogle Scholar
  37. Roeckner E, Brokopf R, Esch M, Giorgetta M, Hagemann S, Kornblueh L, Manzini E, Schlese U, Schulzweida U (2006) Sensitivity of simulated climate to horizontal and vertical resolution in the ECHAM5 atmosphere model. J Clim Spec Sect 19:3771–3791CrossRefGoogle Scholar
  38. Saji NH, Goswami BN, Vinayachandran PN, Yamagata T (1999) A dipole made in the tropical Indian Ocean. Nature 401:360–363Google Scholar
  39. Shamshad KM (1988) The meteorology of Pakistan. Royal Book Company Publishers, 313 pp. ISBN 10: 9694070821Google Scholar
  40. Shukla J (1987) Interannual variability of monsoons. In: Fein JS, Stephens PL (eds) Monsoons. Wiley, London, pp 399–464Google Scholar
  41. Song J-H, Kang H-R, Byuan Y-H, Hong S-Y (2009) Effects of the Tibetan plateau on the Asian summer monsoon; a numerical case study using a regional climate model. Int J Climatol. doi: 10.1002/joc.1906
  42. Torrence C, Webster PJ (1999) Interdecadal changes in the ENSO-monsoon system. J Clim 12:2679–2690CrossRefGoogle Scholar
  43. Uppala SM et al (2005) The ERA-40 re-analysis. Q J R Meteorol Soc 131:2961–3012. doi: 10.1256/qj.04.176 CrossRefGoogle Scholar
  44. Walker GT (1924) Correlations in seasonal variations of weather, IX. A further study of world weather. Mem India Meteorol Dep 24:275–332Google Scholar
  45. Webster PJ (1987) The elementary monsoon. In: Fein JS, Stephens PL (eds) Monsoons. Wiley, New York, pp 3–32Google Scholar
  46. Webster PJ, Yang S (1992) Monsoon and ENSO: selectively interactive systems. Q J R Meteorol Soc 118:877–926CrossRefGoogle Scholar
  47. Yadav RK (2009a) Role of equatorial central Pacific and northwest of North Atlantic 2-meter surface temperature in modulating Indian summer monsoon variability. Clim Dyn 32:549–563CrossRefGoogle Scholar
  48. Yadav RK (2009b) Changes in the large-scale features associated with the Indian summer monsoon in the recent decades. Int J Climatol 29:117–133CrossRefGoogle Scholar
  49. Yasunari T, Kitoh A, Tokioka T (1991) Local and remote responses to excessive snow mass over Eurasia appearing in the northern spring and summer climate—a study with the MRI-GCM. J Metoerol Soc Jpn 69:473–487Google Scholar
  50. Yatagi A, Yasunari T (1995) Interannual variations of summer precipitation in the arid/semi-arid regions in China and Mongolia: their regionality and relation to Asian monsoon. J Meteorol Soc Jpn 73:909–923Google Scholar

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Sajjad Saeed
    • 1
    • 2
    • 3
    Email author
  • Wolfgang A. Müller
    • 1
  • Stefan Hagemann
    • 1
  • Daniela Jacob
    • 1
  1. 1.Max Planck Institute for MeteorologyHamburgGermany
  2. 2.International Max Planck Research School on Earth System ModelingHamburgGermany
  3. 3.Pakistan Meteorological DepartmentIslamabadPakistan

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