Variabilidad de la temperatura estival en Cataluña 1950-1998

Abstract

[ES]En el incremento térmico registrado durante el verano en Cataluña para el periodo 1950-1998 se diferencian dos sectores espaciales bien diferenciados. Uno, el sector representado por el patrón Litoral, que recoge los mayores incrementos de temperatura y cuya evolución aparece estrechamente relacionada con la temperatura del Mediterráneo y con las condiciones atmosféricas que favorecen la insolación. Dos, el sector del patrón Noroccidental, con un incremento menor relacionado principalmente con la evolución del índice EA-JET.

[EN]This contribution aims to characterise summer temperature patterns, and their coupled modes of variability with the large-scale atmospheric circulation anomalies and sea surface temperatures (SST) of Western Mediterranean, over Catalonia for 1950-1998. Two spatial patterns of variability have emerged from RPCA. One, the Littoral pattern shows stronger contribution to regional increases in temperature, as well as reaches the highest correlations with Western Mediterranean SSTs. It is also well related to large-scale indices (EA-Jet and ASU), which determine cloud cover and thus sunshine levels over the western Mediterranean basin during previous months. Two, NW pattern has less contribution to summer regional warming and weaker relationships to Mediterranean SST. It is mainly related to EA-Jet without lag.