MAXIMUM TEMPERATURE IN MEXICO, WITH REGARD TO PACIFIC DECADAL OSCILLATION AND GLOBAL WARMING

José Luis Bravo, Enrique Azpra - Romero, Victor Carlos Zarraluqui

Abstract


The behavior of the maximum temperature in Mexico and its relationship with the Pacific Decadal Oscillation (PDO) is studied. A selection of climatological stations with sufficient and reliable data collected since 1950 to 2007 has been used. The temporal behavior of the selected stations is analyzed revealing that, even in those having a uniform behavior, the influence of local conditions is important. To remove these influences the stations are classified into 5 clusters, according its annual average maximum temperature, clusters are geographically distributed according to the altitude and latitude. A bilinear least square fit was made to establish the dependence of maximum temperature with these variables. The first principal component of each of the 5 conglomerates was obtained and compared with the Pacific Decadal Oscillation index. Coastal stations below 300 m, with the highest temperatures, have a similar behavior with the PDO index; the similarity is decreasing as the stations altitude increase and is increasing again for the highest stations.


Keywords


Maximum temperature, Data quality, Pacific Decadal Oscillation, Principal components analysis.

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References


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DOI: http://dx.doi.org/10.15551/scigeo.v62i1.349

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