Climate analysis in the central Pyrenees from instrumental and paleoclimate proxy data

Identificador:  TDX:2710

Handle: https://hdl.handle.net/20.500.11797/TDX2710

Autors:  Pérez Zanón, Nuria

Resum:
This thesis deals with the thermopluviometric series that characterize the climate of the central Pyrenees during the instrumental period, which also allow to characterize the climatic drift during the last century. Furthermore, these series have been used to analyse natural records capable of capturing the climatic signal during the last 500 years. These thermopluviometric series have been obtained from data observed in-situ, both in manual and automatic observatories, during the instrumental period 1910-2013 for the longer series of maximum and minimum temperature and precipitation available in the study area. After quality controlling the observed data and applying the most appropriate homogenization method, the series of regional anomalies show the variability and climate change in annual and seasonal scales. The sediments of Lake Montcortès have been analyzed and the influence of the climate in the alteration of the recurrence of the mixture of the water column of the lake, that was considered meromictic, has been studied. On the other hand, tree ring thickness chronologies have been used to evaluate their ability to capture the regional climatic signal as well as the weather regimes of the North Atlantic in summer. To this end, the regional climate of the central Pyrenees has been characterized by synoptic compositions (composites) of sea level pressure in normal and extreme summers (through regional series of anomalies).