Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3496-6 |
Heavy precipitation in the southwest of Iran: association with the Madden-Julian Oscillation and synoptic scale analysis | |
Nazemosadat, M. Jafar; Shahgholian, K. | |
2017-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Iran |
英文摘要 | Some important characteristics of the November-April heavy precipitation in southwestern parts of Iran and their linkages to the Madden-Julian Oscillation (MJO) were assessed for the period of 1975-2011. Daily precipitation data in nine meteorological stations spread in various parts of the study area and the corresponding MJO indices were analyzed. For each station, precipitation data were sorted in descending order and those values that fell within 5% of the highest records were categorized as the heavy precipitation. Besides this, the 10% threshold was also analyzed as an axillary assessment. The considered heavy precipitation data (5% threshold) accounted from about 26-35% of total annual precipitation. About half of the heavy precipitation occurred during December-January period and the other half distributed within the months of March, February, November and April by about 17, 14, 13and 6%, respectively. The highest frequency of heavy precipitation was related to the MJO phase 8. After this, the more frequent precipitation events were respectively associated to the phases 2, 7, 1, 6, 5 and 4 of the MJO. For the phases 1, 2, 7 and 8 frequency of the heavy precipitation statistically increased when the MJO amplitude was greater than unity. In contrast, for phases 4 and 5, heavy precipitation was generally linked to the spells that the amplitude size was lower than unity. Formation of a strong north-south oriented cold front mainly in Saudi Arabia and west-east oriented warm fronts in the southwest of Iran were realized as the key elements for initiating heavy precipitation over the study area. Although development of the Mediterranean-based cyclonic circulation is essential for the formation of these fronts, moisture transport mostly originates from northern parts of the Arabian Sea, southern parts of the Red Sea and the Persian Gulf. |
英文关键词 | Iran MJO Persian Gulf Precipitation Shiraz Synoptically analysis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414153800009 |
WOS关键词 | INDIAN-OCEAN PRECIPITATION ; MULTIVARIATE MJO INDEX ; LA-NINA ; ENSO ; RAINFALL ; VARIABILITY ; CIRCULATION ; PREDICTION ; INTENSITY ; DROUGHT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35334 |
专题 | 气候变化 |
作者单位 | Shiraz Univ, Water Engn Dept, Coll Agr, AORC, Shiraz, Iran |
推荐引用方式 GB/T 7714 | Nazemosadat, M. Jafar,Shahgholian, K.. Heavy precipitation in the southwest of Iran: association with the Madden-Julian Oscillation and synoptic scale analysis[J]. CLIMATE DYNAMICS,2017,49. |
APA | Nazemosadat, M. Jafar,&Shahgholian, K..(2017).Heavy precipitation in the southwest of Iran: association with the Madden-Julian Oscillation and synoptic scale analysis.CLIMATE DYNAMICS,49. |
MLA | Nazemosadat, M. Jafar,et al."Heavy precipitation in the southwest of Iran: association with the Madden-Julian Oscillation and synoptic scale analysis".CLIMATE DYNAMICS 49(2017). |
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