Algal lipids reveal unprecedented warming rates in alpine areas of SW Europe during the industrial period
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Afficher la notice complèteAuteur
García-Alix Daroca, Antonio; Jiménez Moreno, Gonzalo; Pérez Martínez, María del Carmen; Jiménez, Laura; Rodrigo Gámiz, MartaEditorial
European Geosciences Union
Date
2020-02-06Referencia bibliográfica
García-Alix, A., Toney, J. L., Jiménez-Moreno, G., Pérez-Martínez, C., Jiménez, L., Rodrigo-Gámiz, M., ... & Ramos-Román, M. J. (2020). Algal lipids reveal unprecedented warming rates in alpine areas of SW Europe during the industrial period. Climate of the Past, 16(1), 245-263.
Patrocinador
This research has been supported by the Seventh Framework Programme (grant no. NAOSIPUK (623027)), the Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación (grant no. CGL2017-85415- R), the Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación (grant no. CGL2013- 47038-R), the Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación (grant no. CGL2011-23483), and the Consejería de Economía, Innovación, Ciencia y Empleo, Junta de Andalucía, Agencia de Innovación y Desarrollo de Andalucía (grant no. P11-RNM 7332). This research has also been supported by grant no. 87/2007 of the Organismo Autónomo Parques Nacionales (OAPN)-Ministerio de Medio Ambiente, the research group no. RNM-190 of the Plan Andaluz de Investigación, Desarrollo e Innovación (Junta de Andalucía), and the Ramón y Cajal Fellowship (fellowship no. RYC-2015-18966) of the Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación.Résumé
Alpine ecosystems of the southern Iberian Peninsula
are among the most vulnerable and the first to respond
to modern climate change in southwestern Europe. While
major environmental shifts have occurred over the last ~
1500 years in these alpine ecosystems, only changes in the
recent centuries have led to abrupt environmental responses,
but factors imposing the strongest stress have been unclear
until now. To understand these environmental responses, this
study, for the first time, has calibrated an algal lipid-derived
temperature proxy (based on long-chain alkyl diols) to instrumental
historical data extending alpine temperature reconstructions
to 1500 years before present. These novel results
highlight the enhanced effect of greenhouse gases on
alpine temperatures during the last ~ 200 years and the longterm
modulating role of solar forcing. This study also shows
that the warming rate during the 20th century (~ 0:18 ºC per
decade) was double that of the last stages of the Little Ice Age
(~ 0:09 ºC per decade), even exceeding temperature trends
of the high-altitude Alps during the 20th century. As a consequence,
temperature exceeded the preindustrial record in the
1950s, and it has been one of the major forcing processes of
the recent enhanced change in these alpine ecosystems from
southern Iberia since then. Nevertheless, other factors reducing
the snow and ice albedo (e.g., atmospheric deposition)
may have influenced local glacier loss, since almost steady
climate conditions predominated from the middle 19th century
to the first decades of the 20th century.