Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5686 |
Extreme rainfall indices in Distrito Federal, Brazil: Trends and links with El Nino southern oscillation and Madden-Julian oscillation | |
Borges, Pablo de Amorim1,2; Bernhofer, Christian3; Rodrigues, Regina1 | |
2018-10-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:12页码:4550-4567 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; Germany |
英文摘要 | This study investigates trends and the effects of the interannual and intraseasonal climate variability on the extreme weather of Brazil's capital city Distrito Federal (DF). This area is highly vulnerable to climate variability, having suffered from droughts and floods that affected the drinking water supply and agriculture. We perform trend analysis of 12 rainfall-related indices from 13 ground observation stations and assess the influence of El Nino southern oscillation (ENSO) and Madden-Julian oscillation (MJO) on rainfall totals and extreme indices. The trend analysis confirms: (a) the increase of the dry spells length and (b) the anticipation of the onset of dry periods at regional level. That is also true when considering dry spells in the rainy season, a hazard known in the agriculture sector as veranico. On the other hand, extreme wet conditions became less severe in the last decades. Supressed monthly rainfall conditions, and some wet indices, are associated with La Nina episodes. The MJO's intraseasonal variability seems to play a substantial role in DF's climate. MJO phases 3, 7 and 8 are associated to enhanced rainfall conditions; whereas rainfall is supressed during phase 5. Moreover, dry spells during the rainy season, or veranico, often coincide with MJO phase 5. When combined with ENSO, the basic response of rainfall to MJO activity changes substantially showing statistically significant influence of El Nino on phases 2 and 8; while La Nina on phases 4, 6 and 7. The findings contribute to a better understanding of the ongoing changes in extreme climate as well as the influence of natural climate variability on local's climate, information that can be used in the management of water resources and land use of DF. |
英文关键词 | Brazil Distrito Federal ENSO extreme indices MJO rainfall trends veranico |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000446279100016 |
WOS关键词 | ATLANTIC CONVERGENCE ZONE ; SEA-SURFACE TEMPERATURE ; SUMMER MONSOON ; ATMOSPHERIC CIRCULATION ; INTERANNUAL VARIABILITY ; PRECIPITATION EXTREMES ; CLIMATE EXTREMES ; AUSTRAL SUMMER ; DRY SPELLS ; AMERICA |
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/37221 |
专题 | 气候变化 |
作者单位 | 1.Univ Fed Santa Catarina, Programa Posgrad Oceanog, Ctr Ciencias Fis & Matemat CFM, Florianopolis, SC, Brazil; 2.Univ Fed Santa Catarina, Programa Posgrad Engn Ambiental, BR-88040900 Florianopolis, SC, Brazil; 3.Tech Univ Dresden TU Dresden, Inst Hydrol & Meteorol, Dept Meteorol, Tharandt, Germany |
推荐引用方式 GB/T 7714 | Borges, Pablo de Amorim,Bernhofer, Christian,Rodrigues, Regina. Extreme rainfall indices in Distrito Federal, Brazil: Trends and links with El Nino southern oscillation and Madden-Julian oscillation[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(12):4550-4567. |
APA | Borges, Pablo de Amorim,Bernhofer, Christian,&Rodrigues, Regina.(2018).Extreme rainfall indices in Distrito Federal, Brazil: Trends and links with El Nino southern oscillation and Madden-Julian oscillation.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(12),4550-4567. |
MLA | Borges, Pablo de Amorim,et al."Extreme rainfall indices in Distrito Federal, Brazil: Trends and links with El Nino southern oscillation and Madden-Julian oscillation".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.12(2018):4550-4567. |
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