Arid
DOI10.1002/joc.3926
Cluster analysis applied to the spatial and temporal variability of monthly rainfall in Alagoas state, Northeast of Brazil
Lyra, Gustavo B.1; Oliveira-Junior, Jose F.1; Zeri, Marcelo2
通讯作者Zeri, Marcelo
来源期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2014
卷号34期号:13页码:3546-3558
英文摘要

Rainfall over the northeast part of Brazil is highly influenced by several weather systems such as trade winds, the Intertropical Convergence Zone, Easterly Wave Disturbances, Bolivia High and Atlantic Sub-tropical Anticyclone. The objectives of this work were to identify, using cluster analysis, spatial and temporal rainfall patterns for the northeastern Brazilian state of Alagoas, and to relate those patterns with the weather systems that occur over that region, which is the most populated area of semiarid climate in the world. The dataset consists of 30-years long time series of rainfall from 36 stations located on the state. Hierarchical clustering using Ward’s algorithm was used to classify the sites into five groups. The stations were grouped according to the distance to the coast and orography. Rainfall is not uniformly distributed in space and time in all regions, such as in two groups within the arid zone, where more than 60% of annual precipitation occurs in a period of 5 months (March to July). Rainfall was highest in the coastal regions and over areas of the state with high altitude, due to orographic rainfall. Overall, rainfall over the state of Alagoas is characterized by strong gradients from the coast to the continent and from north to south due to the physiography of the region and the influence of weather systems with different time scales.


英文关键词cluster analysis homogeneous rainfall intra-annual variability weather systems
类型Article
语种英语
国家Brazil
收录类别SCI-E
WOS记录号WOS:000344177200005
WOS关键词TROPICAL ATLANTIC ; INTERANNUAL VARIATIONS ; SOIL PROPERTIES ; WEST-AFRICA ; PRECIPITATION ; CIRCULATION ; TEMPERATURE ; REANALYSES ; NCEP/NCAR ; PATTERNS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/182700
作者单位1.Univ Fed Rio de Janeiro, Inst Florestas, Dept Ciencias Ambientais, BR-23890000 Rio De Janeiro, Brazil;
2.Inst Nacl Pesquisas Espaciais, Ctr Ciencia Sistema Terrestre, BR-12630000 Sao Paulo, Brazil
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GB/T 7714
Lyra, Gustavo B.,Oliveira-Junior, Jose F.,Zeri, Marcelo. Cluster analysis applied to the spatial and temporal variability of monthly rainfall in Alagoas state, Northeast of Brazil[J],2014,34(13):3546-3558.
APA Lyra, Gustavo B.,Oliveira-Junior, Jose F.,&Zeri, Marcelo.(2014).Cluster analysis applied to the spatial and temporal variability of monthly rainfall in Alagoas state, Northeast of Brazil.INTERNATIONAL JOURNAL OF CLIMATOLOGY,34(13),3546-3558.
MLA Lyra, Gustavo B.,et al."Cluster analysis applied to the spatial and temporal variability of monthly rainfall in Alagoas state, Northeast of Brazil".INTERNATIONAL JOURNAL OF CLIMATOLOGY 34.13(2014):3546-3558.
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