The tenth IMSC, Beijing, China, 2007 - International Meetings on ...

Analyzing of synoptic intence showers over the southern part of ARAS River
Speaker: Behrooz Sari Sarraf
Dr.Behrooz Sari Sarraf
University of Tabriz
sarisarraf@tabrizu.ac.ir
Dr.Ali Akbar Rasouli
University of Tabriz
Javad Farshi Frogh
Tabriz meteorologocal organization
Mrs.Taherh Kayani
University of Tabriz
<strong>The</strong> main goal of the current study was to examination of some of distinguished intense
rainfalls using six synoptic station data in the southern part of Aras River.To achive our main
goals, the data from six station including Makoo, Khoy, Ardabil,Parsabad, Ahar, and Gholfa
from 1986 t0 2003 was used.By taking advantage of synoptic maps it was found that some
type of shower rains could be resulted of consequence effect of interring cold front upcoming
to the study areas.In this regard two synoptic station Skew_T maps have been analyzed.<strong>The</strong>
final result shows that in the study area some intense showers could be produced from the
local thunderstorm as well. Key Words: southern part of Aras River ,intense shower,Skew-t
Map
Indian Monsoon Rainfall and its relationship with El-nino/Southern Oscillation Index (SOI)
Over India during 1940- 2000
Speaker: C.V.Singh
Dr. C.V.Singh
D.M.S., Vishvkarma Bhawan,Indian Institute of Technology, New Delhi-110016 (India)
cvsingh2@rediffmail.com/*E-mail : cvsingh@cas.iitd.ernet.in
<strong>The</strong> interannual fluctuations in the Southern Oscillation Index (SOI) and their relationship
to the Indian monsoon rainfall (June-September) have been studies for the period 1940-2000
covering 340 stations all over India (in figure 1. each stations contains the seasonal average
rainfall of five neighbors stations). <strong>The</strong> monsoon rainfall is significant correlated with the
southern oscillation index (June-September) 0.65. <strong>The</strong> large positive southern oscillation
indexes are positively correlated with the flood years, while the negative southern oscillation
indexes are correlated with the drought years. In this study, we have taken the flood/drought
and El-Nino years separately and find their relationship with SOI. It has been observed that
mostly drought occurs, when Southern Oscillation Index value is negative. It has also been
noticed that there is a good correlation ship with El-Nino and drought years (57%). <strong>The</strong>
Spectrum analysis is also carried out on monsoon rainfall and Southern Oscillation Index
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