Investigating the Relation Between Heavy Precipitation and Circulation Patterns of the Upper Atmosphere (case study : Southern Khorasan Province)
| Autor: | Hasan Ali Gayoor, Amir Hossain Halabian, Bijan Saberi, Fereshteh Hossain Ali Poorjazi |
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| Jazyk: | perština |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | مخاطرات محیط طبیعی, Vol 1, Iss 2, Pp 11-27 (2013) |
| Druh dokumentu: | article |
| ISSN: | 2676-4377 2676-4385 |
| DOI: | 10.22111/jneh.2013.2453 |
| Popis: | For exact recognition of heavy precipitation of a region there is a need to sufficient studies about dynamic and synoptic conditions of that occurrence. In this study we used environmental-to-circulation method and approach and data from 61 stations of meteorology organizations and 9 hydrometric stations of South Khorasan province. In relation to the circulation patterns of the upper atmosphere by using base component analysis and cluster analysis between 1990-2007, 4 circulation patterns were identified. In analysis of these precipitations one representative day was introduced for every circulation pattern. The results of data analysis showed that the circulation patterns N0.2 and 4 justify the most of precipitations and more than 60% of these precipitations occur in these two patterns. In the point of view of the origin of humidity source we can say that 3 regions have had roles in these precipitations: Mediterranean Sea, the Arabian Sea, and the Persian Gulf. These findings can play an important role in forecasting the precipitation and preventing from flooding in the region. |
| Databáze: | Directory of Open Access Journals |
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