According to the most recent report of the IPCC (2013), globally the surface temperature shows a clear positive trend and each decade is warmer than the previous one, with the number of hot days and nights increasing.

With less certainty, the report indicates that extreme precipitation events are also increasing (in intensity and / or frequency). However, at the regional level, specifically for Mexico, there is much uncertainty about changes in trends, especially in the case of precipitation. In this project "Analysis of Climatic Trends and Dynamic Regionalization for Mexico" of the CONACYT-SEMARNAT fund, the efforts of four institutions (UNAM, CICESE, UAZ and UV) were combined to generate a set of numerical simulations (dynamic donwnscalling) covering the period 1980-2010, with two regional climate models: RegCM4  (with different parameterizations) and PRECIS  at high resolution (50-25 km), for all of Mexico, which constitutes the first intercomparison project of regional models made in Mexico and from which we also obtain an analysis of observed and modeled trends.

Acknowledgements:

Proyecto Catedras CONACYT 1146

Proyecto CONACTY-SEMARNAT 249281

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