Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3344-8 |
The role of synoptic and intraseasonal anomalies on the life cycle of rainfall extremes over South America: non-summer conditions | |
Hirata, Fernando E.; Grimm, Alice M. | |
2017-07-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil |
英文摘要 | Previous study showed that the interaction of synoptic disturbances with intraseasonal anomalies is important for heavy rainfall in the South Atlantic Convergence Zone and the La Plata basin during the austral summer. Here, we conduct similar analysis to study the evolution of rainfall extremes during austral spring (SON), fall (MAM) and winter (JJA). A relatively homogeneous region over southeastern South America, whose limits change little from season to season, is heavily affected by extreme precipitation events, as indicated by the value of the 95th percentile of daily rainfall, higher during the spring season (16.94 mm day(-1)) and lower in winter (13.79 mm day(-1)). From 1979 to 2013, extreme rainfall events are more frequent in spring (131 events) and less frequent in fall (112 events). Similar to summertime extreme events, synoptic-scale waves continue to be the main drivers of extreme precipitation over the region. The interaction between these waves and intraseasonal anomalies during the development of rainfall extremes over southeastern South America is observed especially during neutral ENSO and La Nia conditions. Warm ENSO phases tend to favor more frequent extremes in all three seasons and extreme events during El Nios are associated with synoptic waves, with no significant interaction with intraseasonal anomalies. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403716500018 |
WOS关键词 | ATLANTIC CONVERGENCE ZONE ; MODES ; VARIABILITY |
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/36054 |
专题 | 气候变化 |
作者单位 | Univ Fed Parana, Dept Phys, Curitiba, Parana, Brazil |
推荐引用方式 GB/T 7714 | Hirata, Fernando E.,Grimm, Alice M.. The role of synoptic and intraseasonal anomalies on the life cycle of rainfall extremes over South America: non-summer conditions[J]. CLIMATE DYNAMICS,2017,49. |
APA | Hirata, Fernando E.,&Grimm, Alice M..(2017).The role of synoptic and intraseasonal anomalies on the life cycle of rainfall extremes over South America: non-summer conditions.CLIMATE DYNAMICS,49. |
MLA | Hirata, Fernando E.,et al."The role of synoptic and intraseasonal anomalies on the life cycle of rainfall extremes over South America: non-summer conditions".CLIMATE DYNAMICS 49(2017). |
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