[EN]Pyrenean glaciers are the largest in southern Europe. Their survival is threatened by climate change, highlighting the significance of their study. This research presents an assessment of changes in the glacierized area and thickness of Pyrenean glaciers from 2011 to 2020, using high-resolution optical satellite, airborne lidar and UAV images. The total glacierized area has shrunk by 23.2% and thickness has decreased on average by 6.3 m. These two variables show no correlation for individual glaciers. Although climatic conditions do not vary much among glaciers, their evolution was heterogeneous during the study period. The smaller glaciers (10 ha) have a more homogeneous response. This can be attributed to the generally larger influence of local topography on the response of the smaller Pyrenean glaciers. There is no sign of slowdown in glacier shrinkage respect to previous decades.This work was supported by the Interreg-POCTEFA project OPCC ADAPYR and Spanish Ministry of Economy and Competitiveness project "CGL2017-82216-R." J. Revuelto is supported by the Grant IJC2018-036260-I. I. Vidaller is supported by the Grant FPU18/04978 and is studying the PhD program in the University of Zaragoza. E. Izagirre and I. Rico are supported by the Grant PPGI19/02 (UPV/EHU) and the Consolidated Research Group IT1029-16 (Basque Country Government). E. Berthier acknowledges support from the French Space Agency (CNES)
