Effect of Sea-Air Interaction of Caspian Sea on Heavy and Super Heavy Precipitation Events in the Southern Coasts of Caspian Sea

  • H. Nouri
  • M. Azadi
  • G. Ghasempour
Conference paper
Part of the Springer Atmospheric Sciences book series (SPRINGERATMO)


Cloudiness and precipitation are the most important variables contributing to the formation of the climate of the southern coasts of Caspian Sea. The aim of this research is the investigation of the effect of air-sea interaction on the occurrence of the heavy and super heavy precipitation which is caused by convective and non-convective clouds. On the basis of daily precipitations and with regard to 25% and 50% probability, precipitation events are divided into heavy and super heavy and are also grouped into convective and non-convective cases based on the clouds synoptic codes. The maximum of each precipitation event, the mean and the coverage area was calculated using iso-rain maps for each of the four groups. The relationships among the mean of “2 m air temperature minus sea surface temperature (SST)”, SST and precipitation events were studied. The results show that there are three conditions to occur heavy and super heavy precipitation including, SST increasing harmonically from the north to the south of the Caspian Sea, increased mean SST all over the Sea and increased mean of “2 m air temperature minus SST”. The latter detected factor which is the most effective variable is less in convective than non-convective events and in heavy precipitation than in super heavy events.


Precipitation Event Heavy Precipitation Southern Coast Maximum Coverage Area Convective Heavy Precipitation 
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The authors would like to thank the Institute of Meteorology, Free University, Berlin for their support in the frame of this work.


  1. Biasutti M, Battisti D, Sarachik E (2004) Mechanisms controlling the annual cycle of precipitation in the tropical Atlantic sector in an atmospheric GCM. J Clim 17:4708–4723. doi: 10.1175/JCLI-3235.1 CrossRefGoogle Scholar
  2. Chan J, Zhou W (2005) PDO, ENSO and the early summer monsoon rainfall over South China. Geophys Res Let L08810. doi: 10.1029/2004GL022015.2005.10.5
  3. Giannini A, Saravanan R, Chang P (2005) Dynamics of the boreal summer African monsoon in the NSIPP1 atmospheric model. Clim Dyn 25:517–535CrossRefGoogle Scholar
  4. Huang R, Zhou L, Chen W (2003) The progresses of recent studies on the variability of the East Asian monsoon and their causes. Adv Atmos Sci 20:55–69Google Scholar
  5. Hunt B (2000) Natural climate variability and Sahel precipitation trends. Global Planet Chang 24:107–131CrossRefGoogle Scholar
  6. Kawai Y, Wada A (2007) Diurnal sea surface temperature, variation and its impact on the atmosphere and ocean. J Oceanogr 63:721–744CrossRefGoogle Scholar
  7. Khalili A (1973) Precipitation patterns of central Elburz. Theor Appl Climatol 21:215–232. doi: 10.1007/BF02243729 Google Scholar
  8. Lin Z, Lu R (2009) The ENSO’s effect on Eastern China precipitation in the following early summer. Adv Atmos Sci 26:333–342. doi: 10.1007/s00376-009-0333-4 CrossRefGoogle Scholar
  9. Masoodian A (2003) Climatic regions of Iran. J Geogr Dev 2:171–183Google Scholar
  10. Moradi H (2004) The role of Caspian Sea in the southern coasts precipitation. Iran J Mar Technol Sci 2–3:77–88Google Scholar
  11. Muraleedharan G, Rao A, Kurup P, Nair N, Unnikrishnan S (2007) Coastal engineering. Coast Eng 54(8):630–638. doi: 10.1016/ CrossRefGoogle Scholar
  12. Wu R, Hu Z, Kirtman B (2003) Evolution of ENSO-related precipitation anomalies in the East Asia and the processes. J Clim 16:3741–3757Google Scholar
  13. Yang F, Lau K (2006) Trend and variability of China precipitation in spring and summer: linkage to sea surface temperatures. J Clim 19:4700–4718. doi: 10.1002/joc.1094 CrossRefGoogle Scholar
  14. Zhou L, Wu R (2010) Respective impacts of East Asian winter monsoon and ENSO on winter precipitation in China. J Geophys Res 115:D02107. doi: 10.1029/2009JD012502 CrossRefGoogle Scholar
  15. Zhou L, Chi-Yung T, Wen Z, Johnny C (2009) Influence of the SST and the ENSO on winter precipitation over South China. China J Nat Disasters 31:19–29CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.University of MalayerMalayerIran
  2. 2.Atmospheric Science and Meteorological Research CenterTehranIran
  3. 3.University of Mehr AlborzTehranIran

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