干旱区生态环境知识资源中心(Arid): An analysis of rainfall and rainy days in the northeastern region of Brazil

Arid

DOI	10.1590/S1415-43662011000200004
	An analysis of rainfall and rainy days in the northeastern region of Brazil
	da Silva, Vicente P. R.1; Pereira, Emerson R. R.1; de Azevedo, Pedro V.1; de Sousa, Francisco de A. S.1; de Sousa, Inaja F.2
通讯作者	da Silva, Vicente P. R.
来源期刊	REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL
ISSN	1807-1929
出版年	2011
卷号	15 期号:2 页码:131-138
英文摘要	Rainfall daily data of 600 meteorological stations were analyzed to assess the changes in precipitation in northeastern Brazil. Maps of rainy day numbers and the coefficient of variation (CV) for rainfall and rainy days are presented. Autocorrelation function was obtained for the annual rainfall in northeastern Brazil. Results showed that the semiarid regions have a high coefficient of variation for both rainfall and rainy days than those located in northeastern coast and ’agreste’ of Brazil. The highest values of coefficient of variation are associated to the lowest values of rainfall and rainy days. The rainfall change in northeastern Brazil is smaller in rainy regions than in dry regions. The high changes in rainfall and rainy days are limiting features to the rainfed agriculture in semiarid environments. The correlograms of rainfall indicated significant trend for the limits of 95% confidence levels on some stations.
英文关键词	correlograms coefficient of variation semi arid
类型	Article
语种	葡萄牙语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000208666000004
WOS类目	Agricultural Engineering
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/170369
作者单位	1.UACA UFCG, BR-58429140 Campina Grande, PB, Brazil; 2.DEA UFS, BR-49100000 Sao Cristovao, SE, Brazil
推荐引用方式 GB/T 7714	da Silva, Vicente P. R.,Pereira, Emerson R. R.,de Azevedo, Pedro V.,et al. An analysis of rainfall and rainy days in the northeastern region of Brazil[J],2011,15(2):131-138.
APA	da Silva, Vicente P. R.,Pereira, Emerson R. R.,de Azevedo, Pedro V.,de Sousa, Francisco de A. S.,&de Sousa, Inaja F..(2011).An analysis of rainfall and rainy days in the northeastern region of Brazil.REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL,15(2),131-138.
MLA	da Silva, Vicente P. R.,et al."An analysis of rainfall and rainy days in the northeastern region of Brazil".REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL 15.2(2011):131-138.