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DOI | 10.1002/joc.5987 |
Influence of convectively coupled equatorial waves and intra-seasonal oscillations on rainfall extremes over India | |
Subudhi, Anup K.; Landu, Kiranmayi | |
2019-04-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:5页码:2786-2792 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | Convectively coupled equatorial waves and intra-seasonal oscillations are known to modulate rainfall over the Tropics significantly. The effect of these oscillations on the frequency distribution of extreme precipitation events (defined based on percentile threshold) over Indian region is investigated for the monsoon months of June-September. Based on the variance and phase of the wave, any given day is classified into wet phase and dry phase. Modulation of extreme event probability by the presence of these phases over a given region is quantified for different waves, namely Madden-Julian Oscillation (MJO), equatorial Rossby wave (ER), equatorial Kelvin wave and mixed Rossby gravity and tropical depressions (MT). It is shown that the presence of wet phase of the waves increases the probability of extreme precipitation occurrence by as much as 150% of the baseline probability while the presence of dry phase can decrease the probability by half over certain regions depending on the wave. Averaged over the whole country, wet phase increases the probability by 30-60% while dry phase decreases by 20-40% except for MT waves where there is increased extreme activity during dry phase. However, the intensity of extreme precipitation does not show significant sensitivity to the changes in phase of the waves. |
英文关键词 | convectively coupled equatorial waves extreme events intra-seasonal oscillations |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467048900019 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; WEATHER EVENTS ; EL-NINO ; FREQUENCY ; INTENSITY ; MONSOON |
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/182127 |
专题 | 气候变化 |
作者单位 | Indian Inst Technol Bhubaneswar, Sch Earth Ocean & Climate Sci, Bhubaneswar, Odisha, India |
推荐引用方式 GB/T 7714 | Subudhi, Anup K.,Landu, Kiranmayi. Influence of convectively coupled equatorial waves and intra-seasonal oscillations on rainfall extremes over India[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(5):2786-2792. |
APA | Subudhi, Anup K.,&Landu, Kiranmayi.(2019).Influence of convectively coupled equatorial waves and intra-seasonal oscillations on rainfall extremes over India.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(5),2786-2792. |
MLA | Subudhi, Anup K.,et al."Influence of convectively coupled equatorial waves and intra-seasonal oscillations on rainfall extremes over India".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.5(2019):2786-2792. |
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