La respuesta heterogénea de los glaciares pirenaicos entre 2011 y 2020

  1. I.Vidaller 1
  2. J. Revuelto 1
  3. E. Izagirre 2
  4. E. Alonso-González 1
  5. Simon Gascoin 3
  6. Pierre Rene 4
  7. Etienne Berthier 3
  8. F. Rojas-Heredia 1
  9. I. Rico 2
  10. A. Moreno 1
  11. J.I López-Moreno 1
  1. 1 Instituto Pirenaico de Ecología (IPE-CSIC)
  2. 2 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  3. 3 Universidad de Toulouse
  4. 4 Asociación Moraine, Luchon, Francia
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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 1038

Type: Article

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More publications in: Geotemas (Madrid)

Abstract

Pyrenean glaciers are in an evident shrinkage since Little Ice Age (LIA) with a marked tendency of glacier retreatment, and this decline has been accelerated in the recent decades. The use of modern technologies such as drones (UAVs), terrestrial laser scanner (TLS) and LiDAR has allowed us to obtain a mass balance between the years 2011 to 2020. We observed more than 20% area loss (24.15%) and 61.43hm3 of volume loss. Besides that, the mean thickness loss in all the glaciers studied is 7.27m, which means that some of these glaciers have lost half of their current thickness in the last nine years. To these losses we must add the shrinkage between 1850 to 2016, when glaciers loss the 88.25% of its area (Rico et al., 2017), so the total losses since the end of the LIA mounts up to 95.91%. This accelerated shrinkage cause that these glaciers, ones of the southernmost glaciers in Europe, has now a topoclimatic control instead of directly responding to the regional climatic conditions, thus causing a heterogeneous response to the cli- mate change that depends on altitude, orientation and cirque morphology. As a result, those small and retreated glaciers, protected to the cirque walls, may exist today in areas where average annual temperature is about 0ºC (Grunewald and Scheithauer, 2010).

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