Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5430 |
Sub-monthly variability of the South American summer precipitation under El Nino and La Nina backgrounds during the 1998-2012 period | |
de Lima, Alexandra Amaro1; Andreoli, Rita Valeria2; Kayano, Mary Toshie3 | |
2018-04-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
![]() |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:5页码:2153-2166 |
文章类型 | Review |
语种 | 英语 |
国家 | Brazil |
英文摘要 | The sub-monthly intra-seasonal 8-24-day period (SIS8-24) timescale variability of the summer (1 November to 31 March) rainfall over South America (SA) under distinct inter-annual (IA) backgrounds was analysed using the Tropical Rainfall Measure Mission (TRMM) based daily total precipitation data for the 1998-2012 period. The IA backgrounds refer to the El Nino (EN) and La Nina (LN) years. First, the summer daily precipitation anomaly fields were subject to the empirical orthogonal function (EOF) analysis. Using the first and the second principal component time series filtered at the SIS8-24 timescale, positive and negative events were selected. The first SIS8-24 mode features a precipitation anomaly dipole with centres over southeastern SA (SESA) and central and eastern tropical SA both extending southeastwards into the adjacent Atlantic Ocean. The second mode features a precipitation anomaly pattern similar to that previously documented for the oceanic South Atlantic convergence zone (SACZ). The SIS8-24 precipitation anomaly patterns for the positive (negative) events show differences in the anomaly intensities between EN and LN years, but with almost the same locations of the anomaly centres. These differences result from the variability inter-SIS8-24 events, as indicated by the distinct paths of the SIS8-24 Rossby wave train patterns in the subtropics, although they are regionally locked over tropical SA. The relation between the SIS8-24 and IA variabilities might occur through variations in the Rossby wave train patterns. The Rossby wave trains of both timescales, depending on their phases, reinforce or weaken the rainfall anomalies over SA, in such a way that the rainfall anomalies over SA show similar patterns but with distinct magnitudes for EN and LN composites. The South American precipitation responses to the combined SIS8-24 and IA variability timescales stratified according to the IA backgrounds have not been studied before and might be useful for operational forecasting services. |
英文关键词 | sub-monthly intra-seasonal variability inter-annual variability precipitation South America Rossby wave |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428880600001 |
WOS关键词 | ATLANTIC CONVERGENCE ZONE ; LATENT HEATING DISTRIBUTIONS ; PASSIVE MICROWAVE RADIOMETRY ; SCALE COMMON FEATURES ; BAIU FRONTAL ZONE ; OSCILLATION ; CIRCULATION ; RAINFALL ; ANOMALIES ; 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/37379 |
专题 | 气候变化 |
作者单位 | 1.Univ Estado Amazonas, INPA, Programa Posgrad Clima & Ambiente CLIAMB, Ave Andre Araujo 2936,Campus 2, BR-69060001 Manaus, Amazonas, Brazil; 2.Univ Estado Amazonas, Escola Super Tecnol, Manaus, Amazonas, Brazil; 3.Inst Nacl Pesquisas Espaciais, Div Modelagem & Desenvolvimento, Ctr Previsao Tempo & Estudos Climat, Sao Jose Dos Campos, Brazil |
推荐引用方式 GB/T 7714 | de Lima, Alexandra Amaro,Andreoli, Rita Valeria,Kayano, Mary Toshie. Sub-monthly variability of the South American summer precipitation under El Nino and La Nina backgrounds during the 1998-2012 period[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(5):2153-2166. |
APA | de Lima, Alexandra Amaro,Andreoli, Rita Valeria,&Kayano, Mary Toshie.(2018).Sub-monthly variability of the South American summer precipitation under El Nino and La Nina backgrounds during the 1998-2012 period.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(5),2153-2166. |
MLA | de Lima, Alexandra Amaro,et al."Sub-monthly variability of the South American summer precipitation under El Nino and La Nina backgrounds during the 1998-2012 period".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.5(2018):2153-2166. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论