文章基本信息

标题：Análise do Comportamento Atmosférico em Situação de Seca: Uma Abordagem Operacional para Pernambuco (Analysis of Atmospheric Behavior Under Drought Condition: An Operational Approach to Pernambuco)
本地全文：下载
作者：Thiago Luiz do Vale Silva ; Roni Valter de Souza Guedes
期刊名称：Revista Brasileira de Geografia Física
印刷版ISSN：1984-2295
电子版ISSN：1984-2295
出版年度：2012
卷号：5
期号：4
页码：937-950
出版社：Revista Brasileira de Geografia Física
摘要：Because of the natural drought recurrence in the Northeastern Semiarid and its social and economic consequences, there is a need for studies and methodologies in assessing atmospheric behavior during these kinds of events. Thus, an operational analysis on drought evolution in the state of Pernambuco was carried by using rainfall data from the state’s Water and Climate Agency (APAC), with an approach to atmospheric dynamics and thermodynamics. Results were evaluated on a monthly basis for the rainy season of the state’s semi-arid region, known as Sertão Pernambuco, and indicated that the main conditioning factor in rain scarcity throughout the state was the negative SST anomalies in the South Atlantic Ocean, followed by the presence of an anticyclone over the Northeast of Brazil during the semiarid rainy season. It was observed that, despite the occurrence of a La Niña event, its effects were inhibited by the dynamic configuration molded by the South Atlantic and north-south SST anomalies
关键词：Water deficit; climate variability; APAC