A STUDY OF THE RELATIONSHIP BETWEEN ENSO AND THE DISTRIBUTION OF ANNUAL PRECIPITATION IN IRAN IN THE PERIOD 1971-2000

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

AHMADI GIVI F.; PARHIZKAR D.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF GEOPHYSICS Year:2009 | Volume:2 | Issue:2 Page(s): 25-37

Download Full-Text

Persian Verion

View:

929

Download:

Cites:

Information Journal Paper

Title

A STUDY OF THE RELATIONSHIP BETWEEN ENSO AND THE DISTRIBUTION OF ANNUAL PRECIPITATION IN IRAN IN THE PERIOD 1971-2000

Author(s)

AHMADI GIVI F. | PARHIZKAR D. | Issue Writer Certificate

Keywords

ENSOQ3

EL-NINOQ2

LA-NINAQ3

ANNUAL RAINFALL ANOMALIESQ3

OCEANIC NINO INDEXQ3

Abstract

An analysis of annual rainfall over Iran for a period of 30 years (1971-2000) shows a significant variability in spatial and temporal distributions of rainfall as well as its frequency and intensity. In this paper, the likely effects of ENSO on the rainfall anomalies are investigated. The accumulated monthly and annual rainfalls from 43 synoptic stations are taken through Islamic Republic of Iran Meteorology Organization (IRIMO) and the ENSO activity years are obtained from NOAA. Three cases of strong cold phase (La-Nina) and three cases of strong warm phase (El-Nino) of ENSO in the period of this study havebeen selected. Then, the distribution of ANNUAL RAINFALL ANOMALIES for these cases is studied. Also, the relation between the ANNUAL RAINFALL ANOMALIES and OCEANIC NINO INDEX (ONI), from the sign and magnitude view point, for the selected cases is examined. These investigations have been done for both solar and agriculture (from autumn of one year to the next) years. In addition, the correlation between the ONI and the annual rainfall of the 43 stations for the total 30 year period of study is calculated.The results of the distribution of ANNUAL RAINFALL ANOMALIES for the above cases indicate that there is no certain relation between the rainfall anomalies over Iran and the different phases of ENSO activity. The comparison of ANNUAL RAINFALL ANOMALIES and the ONI anomalies shows that although there is consistency between the signs of anomalies in five of the cases, but the magnitudes are substantially inconsistent. For example, the most intense EL-NINO is associated with the least positive rainfall anomalies and the most intense LA-NINA is associated with positive rainfall anomalies, instead of a negative anomaly. The weak correlation between the ONI and the annual rainfall of the 43 stations for the period of 30 years confirms the above results.The key result is that it is not possible to predict the sign and magnitude of ANNUAL RAINFALL ANOMALIES having the phase of ENSO activity. The possible reason being that ENSO has a complex and nonlinear interaction with other phenomena such as Monsoon, North Atlantic Oscillation (NAO), and Madden- Julian Oscillation (MJO).

Cites

EFFECT OF ENSO PHENOMENON ON MONTHLY SEASONAL TEMPERATURE VARIATIONS OF COUNTRY HALF SOUTH

References

No record.

Cite

APA: Copy

AHMADI GIVI, F., & PARHIZKAR, D.. (2009). A STUDY OF THE RELATIONSHIP BETWEEN ENSO AND THE DISTRIBUTION OF ANNUAL PRECIPITATION IN IRAN IN THE PERIOD 1971-2000. IRANIAN JOURNAL OF GEOPHYSICS, 2(2), 25-37. SID. https://sid.ir/paper/133775/en

Vancouver: Copy

AHMADI GIVI F., PARHIZKAR D.. A STUDY OF THE RELATIONSHIP BETWEEN ENSO AND THE DISTRIBUTION OF ANNUAL PRECIPITATION IN IRAN IN THE PERIOD 1971-2000. IRANIAN JOURNAL OF GEOPHYSICS[Internet]. 2009;2(2):25-37. Available from: https://sid.ir/paper/133775/en

IEEE: Copy

F. AHMADI GIVI, and D. PARHIZKAR, “A STUDY OF THE RELATIONSHIP BETWEEN ENSO AND THE DISTRIBUTION OF ANNUAL PRECIPITATION IN IRAN IN THE PERIOD 1971-2000,” IRANIAN JOURNAL OF GEOPHYSICS, vol. 2, no. 2, pp. 25–37, 2009, [Online]. Available: https://sid.ir/paper/133775/en

Related Journal Papers