Synoptic-dynamic analysis of extreme precipitation in Karoun River Basin, Iran

  • Iman RoustaEmail author
  • Mostafa Karampour
  • Mehdi Doostkamian
  • Haraldur Olafsson
  • Hao Zhang
  • Terence Darlington Mushore
  • Amin Shiri Karimvandi
  • Edgar Ricardo Monroy Vargas
Original Paper


In the present study, synoptic-dynamic aspects of extreme precipitation in Karoun River Basin were analyzed using two types of data, namely (1) grid views of Iran’s daily precipitation as registered in 1434 stations and (2) atmospheric data including sea-level pressure (SLP), geopotential height (HGT) for 1000, 850, and 500 hPa, temperature, and U&V wind components for a 54-year statistical period (1960–2013). In order to identify extreme precipitation, three criteria were used: the precipitation events should exceed 95th percentile threshold, have a minimum of 50% coverage with spatial continuity, and last for at least two consecutive days. The results showed that extreme precipitation of study area are affected by atmospheric patterns of the Caspian Sea low pressure-European migratory high pressure, Eastern Mediterranean low pressure-Central Iran low pressure, the Eastern Mediterranean low pressure-Siberian-Tibetan high pressure, and Sudanic low pressure-gigantic European high pressure. In all these patterns, the cyclonic motion is observed at all of the atmosphere levels, which indicates the effect of the atmosphere dynamic mechanisms at the time of occurrence of extreme precipitation. At 300 hPa level, the left side of the jet stream, the left exit of the subtropical jet stream, and the right entrance of the polar front jet stream were located over the study area.


Extreme precipitation Moisture flux convergence Atmosphere vorticity Jet stream Karoun River basin 



Iman Rousta is deeply grateful to his supervisor (Haraldur Olafsson, Professor of Atmospheric Sciences, Department of Physics, University of Iceland, Institute for Atmospheric Sciences and Icelandic Meteorological Office) for his great support, kind guidance, and encouragement. The authors would like to thank Prof. Seyyed Abolfazl Masoudian for providing the Asfazari dataset. We are also grateful to the Iran Meteorological Organization and NCEP/NCAR for providing the meteorological data for this study.

Author contributions

I.R. and M.D. proposed the topic. The corresponding author, I.R., M.K., M.D., H.O., H.Z., A.S.K, and E.R.M.V. commanded the data processing, analysis, and wrote the manuscript. I.R., M.K., M.D., H.O., H.Z., T.D.M., and E.R.M.V., helped to enhance the research design, analysis, and manuscript writing.

Funding statement

This work was supported by Vedurfelagid, Rannis, and Rannsoknastofa i vedurfraedi.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.


  1. Ahmadi M, Dadashi A (2016) Assessment of the tracks of spatio-temporal precipitation, Iran. Phys Geogr Res 465–484 (In Persian)Google Scholar
  2. Alijani B, Harman JR (1985) Synoptic climatology of precipitation in Iran. Ann Assoc Am Geogr 75:404–416CrossRefGoogle Scholar
  3. Alijani B, Jafarpour Z, Ghaderi H (2005) Evaluation and prediction of raining in larestan district by means of Markov chain model. Geogr Teritory J 7:11–34 (in Persian)Google Scholar
  4. Alizadeh T, Azizi G, Rousta I (2012) Analyzing of 500 hPa atmospheric patterns in the incidence of prevassive and sectional rainfall in Iran. Plann Arrang Space (Human Sci) 16:1–24Google Scholar
  5. Arvin SA, Sajadian SM, Ghanghermeh A, Heydari J (2015) The role of subtropical jet-stream in daily precipitation more than 10 mm in Zayanderood Basin. Phys Geogr Res 77:125–142 (in Persian)Google Scholar
  6. Asakereh H, Ashrafi S, Tarkarani F (2014a) The relationship between precipitation status and daily temperature status in Iran. Geogr Dev 12:71–93 (in persian)Google Scholar
  7. Asakereh H, Ghaemi H, Beyranvand A (2014b) Spatial analysisof subtropical jet stream in the desert areas of Mideast and North Africa with a focus on Iran. Sci J Manag Syst 1:103–121 (in Persian)Google Scholar
  8. Azizi G, Nayeri M, Rostami JS (2009) Synoptic analysis of heavy precipitation in west of Iran. J Phys Geogr 1:1–13 (in Persian)Google Scholar
  9. Azizi G, Mohammadi H, Karimi M, Shamsipour AA, Rousta I (2015a) The relationship between the Arctic Oscillation and North Atlantic Blocking Frequency. Open J Atmosp Clim Change 1:1–9Google Scholar
  10. Azizi G, Mohammadi H, Karimi M, Shamsipour AA, Rousta I (2015b) Identification and analysis of the North Atlantic blockings. Int J Curr Life Sci 5:577–581Google Scholar
  11. Balling RC, Kiany K, Sadegh M, Sen Roy S, Khoshhal J (2016) Trends in extreme precipitation indices in Iran: 1951–2007. Adv Meteorol 2016:8CrossRefGoogle Scholar
  12. Banacos PC, Schultz DM (2005) The use of moisture flux convergence in forecasting convective initiation: historical and operational perspectives. Weather Forecast 20:351–366CrossRefGoogle Scholar
  13. Barati GR, Jamali JB, Maleki N (2012) Anticyclones and heavy rainfalls over Western Iran. Phys Geogr Res 44:85–95 (in Persian)Google Scholar
  14. Berg P, Haerter J (2013) Unexpected increase in precipitation intensity with temperature—a result of mixing of precipitation types? Atmos Res 119:56–61CrossRefGoogle Scholar
  15. Briggs W (2007) Statistical methods in the atmospheric sciences. Taylor & Francis, pp 380Google Scholar
  16. Change IPOC (2007) Climate change 2007: the physical science basis. Agenda 6:333Google Scholar
  17. Charabi Y, Al-Hatrushi S (2010) Synoptic aspects of winter rainfall variability in Oman. Atmos Res 95:470–486CrossRefGoogle Scholar
  18. Clark AJ, Schaffer CJ, Gallus WA Jr, Johnson-O’Mara K (2009) Climatology of storm reports relative to upper-level jet streaks. Weather Forecast 24:1032–1051CrossRefGoogle Scholar
  19. DeGaetano AT, Shulman MD (1990) A climatic classification of plant hardiness in the United States and Canada. Agric For Meteorol 51:333–351CrossRefGoogle Scholar
  20. Easterling DR, Meehl GA, Parmesan C, Changnon SA, Karl TR, Mearns LO (2000) Climate extremes: observations, modeling, and impacts. Science 289:2068–2074CrossRefGoogle Scholar
  21. Farajzadeh Asl M, Lashkari H, Asadallah K (2007) Analysis of jetstream position in relation to precipitation systems in the west of Iran (Ilam and Kermanshah Provinces). Modarres Human Sci 11:239–256 (in Persian)Google Scholar
  22. Fovell RG, Fovell M-YC (1993) Climate zones of the conterminous United States defined using cluster analysis. J Clim 6:2103–2135CrossRefGoogle Scholar
  23. Francis D, Hengeveld H (1998) Extreme weather and climate change. Environment Canada, OntarioGoogle Scholar
  24. Galliani G, Filippini F (1985) Climatic clusters in a small area. Int J Climatol 5:487–501CrossRefGoogle Scholar
  25. Gayoor HA, Halabian AH, Saberi B, Hossain Ali Poorjazi F (2013) Investigating the relation between heavy precipitation and circulation patterns of the upper atmosphere (case study: Southern khorasan province). Nat Environ Haz 1:11–27 (in Persian)Google Scholar
  26. Ghasemi AR, Khalili D (2008) The association between regional and global atmospheric patterns and winter precipitation in Iran. Atmos Res 88:116–133CrossRefGoogle Scholar
  27. Groisman PY, Karl TR, Easterling DR, Knight RW, Jamason PF, Hennessy KJ, Suppiah R, Page CM, Wibig J, Fortuniak K (1999) Changes in the probability of heavy precipitation: important indicators of climatic change. Weather Clim Extremes. Springer, pp 243–283Google Scholar
  28. Guttman NB (1993) The use of L-moments in the determination of regional precipitation climates. J Clim 6:2309–2325CrossRefGoogle Scholar
  29. Gyasi-Agyei Y (2013) Evaluation of the effects of temperature changes on fine timescale rainfall. Water Resour Res 49:4379–4398CrossRefGoogle Scholar
  30. Jahanbakhsh S, Zolfeghari H (2002) Investigation of the synoptic patterns of daily rainfall in western iran. Geogr Res 16–17:234–258 (in Persian)Google Scholar
  31. Jones C, Waliser DE, Lau K, Stern W (2004) Global occurrences of extreme precipitation and the Madden–Julian oscillation: observations and predictability. J Clim 17:4575–4589CrossRefGoogle Scholar
  32. Kalkstein LS, Tan G, Skindlov JA (1987) An evaluation of three clustering procedures for use in synoptic climatological classification. J Clim Appl Meteorol 26:717–730CrossRefGoogle Scholar
  33. Kaviani MR, Alijani B (2001) Principles of climatology. SAMT Press, Tehran (in Persian)Google Scholar
  34. Khoshakhlagh F, Ouji R, Jafarbeglou M (2008) A synoptic study on seasonal patterns of wet and dry spells in Midwest of Iran. Desert 13:89–103Google Scholar
  35. Lee J, Wong DW (2001) Statistical analysis with ArcView GIS. John Wiley & Sons, New York, pp 191Google Scholar
  36. Masoudian SA, Jafari Shendi F (2015) The relationship between synoptic systems influencing heavy rainfall in the northern low rainfall region. Geogr Plann 18:305–331 (in Persian)Google Scholar
  37. Mo K, Ghil M (1988) Cluster analysis of multiple planetary flow regimes. J Geophys Res-Atmos 93:10927–10952CrossRefGoogle Scholar
  38. Mofidi A, Zarrin A (2006) Synoptic investigation of the influence of Sudan low pressure systems on heavy rainfalls in Iran. Geogr Res Quart 77:113–136Google Scholar
  39. Mofidi A, Zarrin A, Janbaz Ghobadi G (2008) Determining the synoptic pattern of autumn heavy and extreme precipitation in Southern Coast of Caspian Sea. J Earth Space Phys 33:131–154Google Scholar
  40. Molteni F, Tibaldi S, Palmer T (1990) Regimes in the wintertime circulation over northern extratropics. I. Observational evidence. Q J R Meteorol Soc 116:31–67CrossRefGoogle Scholar
  41. Nazaripour H (2017) Calibration of rainfall-stream flow relationship for assessing and forecasting hydrological drought in Kavir-e Lut Basin, Iran. Sci J Manag Syst 1:73–90Google Scholar
  42. O’Gorman PA, Schneider T (2009) The physical basis for increases in precipitation extremes in simulations of 21st-century climate change. Proc Natl Acad Sci 106:14773–14777CrossRefGoogle Scholar
  43. Rousta I, Doostkamian M, Haghighi E, Mirzakhani B (2016a) Statistical-synoptic analysis of the atmosphere thickness pattern of Iran’s pervasive frosts. Climate 4:41CrossRefGoogle Scholar
  44. Rousta I, Soltani M, Zhou W, Cheung HH (2016b) Analysis of extreme precipitation events over Central Plateau of Iran. Am J Clim Chang 5:297CrossRefGoogle Scholar
  45. Rousta I, Doostkamian M, Haghighi E, Ghafarian Malamiri HR, Yarahmadi P (2017a) Analysis of spatial autocorrelation patterns of heavy and super-heavy rainfall in Iran. Adv Atmos Sci 34:1069–1081CrossRefGoogle Scholar
  46. Rousta I, Doostkamian M, Taherian A, Haghighi E, Ghafarian Malamiri H, Ólafsson H (2017b) Investigation of the spatio-temporal variations in atmosphere thickness pattern of Iran and the Middle East with special focus on precipitation in Iran. Climate 5:82CrossRefGoogle Scholar
  47. Rousta I, Nasserzadeh M, Jalali M, Haghighi E, Ólafsson H, Ashrafi S, Doostkamian M, Ghasemi A (2017c) Decadal spatial-temporal variations in the spatial pattern of anomalies of extreme precipitation thresholds (case study: Northwest Iran). Atmosphere 8:135CrossRefGoogle Scholar
  48. Rousta I, Doostkamian M, Ólafsson H, Zhang H, Vahedinejad SH, Sarif MO, Monroy Vargas ER (2018a) Analyzing the fluctuations of atmospheric precipitable water in Iran during various periods based on the retrieving technique of NCEP/NCAR. Open Atmos Sci J 12:48–57CrossRefGoogle Scholar
  49. Rousta I, Javadizadeh F, Dargahian F, Ólafsson H, Shiri-Karimvandi A, Vahedinejad SH, Doostkamian M, Monroy Vargas ER, Asadolahi A (2018b) Investigation of vorticity during prevalent winter precipitation in Iran. Advances in Meteorology, Hindawi, pp 1–13CrossRefGoogle Scholar
  50. Sabziparvar AA, Mir Mousavi SH, Karampour M, Doostkamian M, Haghighi E, Rousta I, Olafsson H, Sarif MO, Gupta RD, Moniruzzaman M (2019) Harmonic analysis of the spatiotemporal pattern of thunderstorms in Iran (1961–2010). Advances in Meteorology, Hindawi, pp 1–14CrossRefGoogle Scholar
  51. Schumacher RS, Johnson RH (2008) Mesoscale processes contributing to extreme rainfall in a midlatitude warm-season flash flood. Mon Weather Rev 136:3964–3986CrossRefGoogle Scholar
  52. Soltani M, Rousta I, Taheri SSM (2013) Using Mann-Kendall and time series techniques for statistical analysis of long-term precipitation in Gorgan Weather Station. World Appl Sci J 28:902–908Google Scholar
  53. Soltani M, Rousta I, Khosh Akhlagh F, Modir Taheri SS (2014) Statistical synoptic analysis of summertime extreme precipitation events over Kerman province, Iran. COMECAP, Heraklion-GrecceGoogle Scholar
  54. Soltani M, Laux P, Kunstmann H, Stan K, Sohrabi MM, Molanejad M, Sabziparvar AA, Ranjbar SaadatAbadi A, Ranjbar F, Rousta I, Zawar-Reza P, Khoshakhlagh F, Soltanzadeh I, Babu CA, Azizi GH, Martin MV (2016) Assessment of climate variations in temperature and precipitation extreme events over Iran. Theor Appl Climatol 126:775–795CrossRefGoogle Scholar
  55. Sun L, Shen B, Sui B (2010) A study on water vapor transport and budget of heavy rain in Northeast China. Adv Atmos Sci 27:1399–1414CrossRefGoogle Scholar
  56. Tahayee F, Selki H, Hejazizadeh Z (2016) Study of superheavy Hmdydbarsh Algvh of West and South West Catchment Oromieh Lake. Sci Res J Spat Plann 20:79–96 (in Persian)Google Scholar
  57. Viale M, Nuñez MN (2011) Climatology of winter orographic precipitation over the subtropical Central Andes and associated synoptic and regional characteristics. J Hydrometeorol 12:481–507CrossRefGoogle Scholar
  58. Vries A, Tyrlis E, Edry D, Krichak S, Steil B, Lelieveld J (2013) Extreme precipitation events in the Middle East: dynamics of the Active Red Sea Trough. J Geophys Res-Atmos 118:7087–7108CrossRefGoogle Scholar
  59. Wilks DS (2011) Statistical methods in the atmospheric sciences (vol 100, 3rd edition). Academic press, Cambridge, pp 661Google Scholar
  60. Wong W, Lee J (2005) Statistical analysis of geographic information with ArcView GIS and ArcGIS (No. G 70.212. L43 2005). Wiley, Hoboken, pp 464Google Scholar
  61. Yarahmadi D, Maryanji Z (2011) The analysis of dynamic and synoptic patterns of heavy rainfall in the south west of Caspian Sea and west of Iran (case study: rainfall on 04/11/2004). Phys Geogr Res Q 76:105–120 (in persian)Google Scholar

Copyright information

© Saudi Society for Geosciences 2020

Authors and Affiliations

  • Iman Rousta
    • 1
    • 2
    Email author
  • Mostafa Karampour
    • 3
  • Mehdi Doostkamian
    • 4
  • Haraldur Olafsson
    • 5
  • Hao Zhang
    • 6
  • Terence Darlington Mushore
    • 7
  • Amin Shiri Karimvandi
    • 4
  • Edgar Ricardo Monroy Vargas
    • 8
  1. 1.Department of GeographyYazd UniversityYazdIran
  2. 2.Institute for Atmospheric Sciences- Weather and ClimateUniversity of Iceland and Icelandic Meteorological Office (IMO)ReykjavikIceland
  3. 3.Department of GeographyLorestan UniversityLorestanIran
  4. 4.Department of GeographyUniversity of ZanjanZanjanIran
  5. 5.Department of PhysicsUniversity of Iceland, Institute for Atmospheric Sciences- Weather and Climate, and Icelandic Meteorological Office (IMO)ReykjavikIceland
  6. 6.Department of Environmental Science and EngineeringFudan UniversityShanghaiChina
  7. 7.Department of Physics, Faculty of ScienceUniversity of ZimbabweHarareZimbabwe
  8. 8.Department of Civil EngineeringUniversidad Catolica de ColombiaBogotáColombia

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