Proposta de delimitação de unidades climáticas a partir de técnicas estatísticas de análise multivariada para região de Unaí - MG

Abstract

The objective of this work is to propose the delimitation of climate units for the region of Unaí-MG, through multivariate analysis statistical techniques. Spatially homogeneous locations were defined using rainfall and/or temperature data averages from 22 weather stations (INMET) and 100 rainfall stations (ANA) for the period July to June 1995-1996 to 2014/2015, which were the basis for the calculation of the Water Balance index for each station. Rainfall and Water Balance data were used as 15 input variables for Factor Analysis techniques and, later, Ward Cluster Analysis. The results showed that Units I and II have the lowest altitudes, higher temperature, lower rainfall, severe water deficiency and prolonged drought; Units V and VI have higher altitudes, lower temperatures, higher rainfall and water surplus, and drought is attenuated; and Units III and IV are configured as climate transition regions, with similar altitudes, but heterogeneous total rainfall (rainy to the west and dry to the east).