GSTDTAP  > 气候变化
DOI10.1002/joc.5168
Weather regimes associated with summer rainfall variability over southern Mexico
Diaz-Esteban, Yanet; Raga, Graciela B.
2018
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2018
卷号38期号:1页码:169-186
文章类型Article
语种英语
国家Mexico
英文摘要

This study focuses on the identification of weather regimes (WRs) over Mexico, the tropical eastern Pacific, Central America and the Caribbean, associated with seasonal precipitation over southern Mexico. A self-organizing maps (SOM) analysis of sea level pressure, 850-hPa horizontal winds and 925-hPa-specific humidity for the period 1997-2013 was carried out to identify the circulation patterns. This approach allowed the discrimination of wet and dry regimes, with clear and distinct features. Weather patterns exhibiting negative (positive) mean sea level pressure anomalies, southerly (northerly) winds, above- (below-) average low-level moisture and little (large) influence of the North Atlantic Subtropical High (NASH), resulted in above- (below-) average precipitation over southern Mexico. The intra-seasonal variability of the WRs and their associated rainfall is well captured by this methodology. In particular, the mid-summer drought (MSD) during late July and early August, is clearly represented by a group of patterns, which evidence a strong influence of the NASH, strong easterly winds in the Caribbean Basin and reduced low-level humidity, all factors that combine to induce below-normal rainfall over southern Mexico. The analysis of the inter-annual variability of the WRs suggests that year-to-year variations in their frequencies can impact summer rainfall in the regions of southern Mexico considered in this study. In particular, the analysis indicates that the dominant WR associated with the MSD exhibits a 3- to 4-year modulation in its frequency of occurrence, which has not been previously reported in the literature. The main MSD pattern is more frequent during dry years and has a significant correlation with the Multivariate El Nino-Southern Oscillation (ENSO) Index (MEI), indicating that MSD is stronger during El Nino' years. Also, WRs associated with negative (positive) rainfall anomalies showed positive (negative) correlations with the MEI, suggesting a possible modulation by ENSO phases.


英文关键词weather regimes rainfall variability large-scale circulation
领域气候变化
收录类别SCI-E
WOS记录号WOS:000419093600013
WOS关键词SELF-ORGANIZING MAPS ; SYNOPTICALLY FORCED HYDROCLIMATOLOGY ; GENERAL-CIRCULATION MODELS ; MAJOR ARCTIC WATERSHEDS ; LARGE-SCALE CIRCULATION ; CENTRAL-AMERICA ; INTRASEASONAL VARIABILITY ; INTERANNUAL VARIABILITY ; MIDSUMMER DROUGHT ; CLIMATE-CHANGE
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/37082
专题气候变化
作者单位Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
推荐引用方式
GB/T 7714
Diaz-Esteban, Yanet,Raga, Graciela B.. Weather regimes associated with summer rainfall variability over southern Mexico[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(1):169-186.
APA Diaz-Esteban, Yanet,&Raga, Graciela B..(2018).Weather regimes associated with summer rainfall variability over southern Mexico.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(1),169-186.
MLA Diaz-Esteban, Yanet,et al."Weather regimes associated with summer rainfall variability over southern Mexico".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.1(2018):169-186.
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
[Diaz-Esteban, Yanet]的文章
[Raga, Graciela B.]的文章
百度学术
百度学术中相似的文章
[Diaz-Esteban, Yanet]的文章
[Raga, Graciela B.]的文章
必应学术
必应学术中相似的文章
[Diaz-Esteban, Yanet]的文章
[Raga, Graciela B.]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。