Analysis of the temperature changes in the Aburrá Valley between 1995 and 2015 and modeling based on urban, meteorlogical and energetic parameters

Author(s): D. Robledo, E. Posada, A. Cadavid
Climate 2018, 6(2), 21 (Special issue: Understanding and Mitigating Urban Heat Island-Remote Sensing and GIS Technologies)

Abstract

There is a perception among the inhabitants of the Aburrá Valley Region, that this heavily populated region, which is situated in the Andean mountains of Colombia, has been suffering large temperature elevations in the last years, especially in the last decade. To give perspective about this issue, the authors have gone through the available information about temperature changes in three meteorological stations in the region and have correlated it with a set of variables of urban, climatic, and energetic nature, with the intention of developing an approximate model to understand the temperature changes. Changes in the mean temperature, based on the linear correlation of the data were estimated on 0.47 C for the 20 years between 1995 and 2015; the study showed that 60% of change was found to be related to local human activities and 40% was attributed to the impact of global warming. For the local influences some practical mitigation actions are proposed, related to better energy management and paying more attention to the temperature changes through improvements in the number and capability of sampling stations in the urban air and in the river, which serve as clear indicators of the changes and the effect of any mitigation measures.