GSTDTAP  > 气候变化
DOI10.1002/joc.4810
Low-frequency variability and trends in centennial precipitation stations in southern South America
Saurral, Ramiro I.1,2; Camilloni, Ines A.1,2; Barros, Vicente R.1,2
2017-03-30
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2017
卷号37期号:4
文章类型Article
语种英语
国家Argentina
英文摘要

Southern South America (SSA), considered as the continental region south of 20 degrees S, has experienced significant precipitation variability and trends in the last decades. This article uses monthly quality-controlled precipitation data from rainfall stations with continuous observations during at least 100years to quantify long-term trends as well as interannual-to-centennial variability. Several statistical methods are applied to the data, primarily to detect jumps and look for changes due to relocation of the gauge stations, as well as to identify significant trends. Most of the regions have registered an increase in annual rainfall, largely attributable to changes in the warm season. On the other hand, during winter most stations in Argentina and Brazil do not have significant trends, although eastern Patagonia registered an increase in precipitation and Chile, a marked decrease in rainfall. In order to look into the physical mechanisms behind the observed variability, the changes in mean sea level pressure and precipitable water are quantified for different sub-periods. Also explored is the variability related to the Hadley cell width and strength over the region around SSA. Results show that the Hadley cell has shrunk and shifted towards the equator in winter over the area, which has caused an enhancement of the sinking motion over much of Argentina, Chile and Brazil, while likely increasing the baroclinicity (and associated precipitation) over Patagonia. In summer, the strength of the subsidence decreased and this was associated with an increase of the low-level moisture advection, favouring more rainfall. The observational evidence presented here suggests that the zonal asymmetry in the change of the Hadley cell position over SSA could be linked to the presence of the Andes Cordillera.


英文关键词southern South America precipitation trends and variability Hadley cell
领域气候变化
收录类别SCI-E
WOS记录号WOS:000397497700009
WOS关键词ARGENTINA SUMMER PRECIPITATION ; SURFACE TEMPERATURE ANOMALIES ; LA-PLATA BASIN ; OBSERVATIONAL EVIDENCE ; ANNULAR MODE ; HADLEY-CELL ; CLIMATE ; CIRCULATION ; RAINFALL ; WIDTH
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/37361
专题气候变化
作者单位1.UMI IFAECI CNRS, Ctr Invest Mar & Atmosfera, UBA CONICET, Buenos Aires, DF, Argentina;
2.UBA, Dept Ciencias Atmosfera & Oceanos, FCEN, Buenos Aires, DF, Argentina
推荐引用方式
GB/T 7714
Saurral, Ramiro I.,Camilloni, Ines A.,Barros, Vicente R.. Low-frequency variability and trends in centennial precipitation stations in southern South America[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(4).
APA Saurral, Ramiro I.,Camilloni, Ines A.,&Barros, Vicente R..(2017).Low-frequency variability and trends in centennial precipitation stations in southern South America.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(4).
MLA Saurral, Ramiro I.,et al."Low-frequency variability and trends in centennial precipitation stations in southern South America".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.4(2017).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Saurral, Ramiro I.]的文章
[Camilloni, Ines A.]的文章
[Barros, Vicente R.]的文章
百度学术
百度学术中相似的文章
[Saurral, Ramiro I.]的文章
[Camilloni, Ines A.]的文章
[Barros, Vicente R.]的文章
必应学术
必应学术中相似的文章
[Saurral, Ramiro I.]的文章
[Camilloni, Ines A.]的文章
[Barros, Vicente R.]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

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。