Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3223-3 |
Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America | |
Blazquez, Josefina1,2; Solman, Silvina A.1,2 | |
2017-04-01 | |
发表期刊 | CLIMATE DYNAMICS
![]() |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina |
英文摘要 | The interannual variability of the frontal activity over the western Southern Hemisphere and its linkage with the variability of the atmospheric circulation and precipitation over southern South America is studied. The analysis is focused on the austral winter and spring seasons. The frontal activity is represented by an index defined as the product between the horizontal gradient of temperature and the relative vorticity at 850 hPa (FI) and is computed from the ERA Interim and NCEP2 reanalysis. For the two seasons the main mode of variability of FI, as depicted by the first Empirical Orthogonal Function, presents centres of action located in the southern part of the western Southern Hemisphere. This pattern is present in the two reanalysis datasets. The correlation coefficients between the principal component of the leading mode of FI and the two main modes of the 500 hPa geopotential height indicate that both the ENSO-mode and the SAM modulate the leading pattern of FI in winter while during the spring season the ENSO-mode controls the FI variability. The variability of the FI has a robust influence on the interannual variability of precipitation over southern South America and adjacent oceans. Over the continent, it was found that the pattern of precipitation anomalies associated with the variability of the FI depicts significant signals over southeastern South America (SESA), centre and south of Chile for winter and over SESA and southeastern Brazil for spring and agrees with the pattern of the leading mode of precipitation variability over southern South America. |
英文关键词 | Frontal activity Precipitation Atmospheric circulation Interannual variability Southern Hemisphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398926400028 |
WOS关键词 | LOW-FREQUENCY VARIABILITY ; ANTARCTIC OSCILLATION ; ANOMALIES ; MODES ; ENSO |
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/36059 |
专题 | 气候变化 |
作者单位 | 1.Ctr Invest Mar & Atmosfera CIMA CONICET FCEN, Dept Ciencias Atmosfera & Oceanos FCEN UBA, Inst Franco Argentino Clima & Sus Impactos UMI IF, Ciudad Univ Pabellon 2 Piso 2,C1428EGA, Buenos Aires, DF, Argentina; 2.Centro Invest Mar & Atmosfera CIMA CONICET FCEN U, Dept Ciencias Atmosfera & Oceanos FCEN UBA, Inst Franco Argentino Clima & Impactos UMI IFAECI, Ciudad Univ Pabellon II Piso 2,C1428EGA, Buenos Aires, DF, Argentina |
推荐引用方式 GB/T 7714 | Blazquez, Josefina,Solman, Silvina A.. Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America[J]. CLIMATE DYNAMICS,2017,48. |
APA | Blazquez, Josefina,&Solman, Silvina A..(2017).Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America.CLIMATE DYNAMICS,48. |
MLA | Blazquez, Josefina,et al."Interannual variability of the frontal activity in the Southern Hemisphere: relationship with atmospheric circulation and precipitation over southern South America".CLIMATE DYNAMICS 48(2017). |
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