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Permafrost conditions in the Mediterranean region since the Last Glaciation

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dc.contributor.authorOliva, Marc
dc.contributor.authorŽebre, M.
dc.contributor.authorGuglielmin, M.
dc.contributor.authorHughes, P.D.
dc.contributor.authorÇiner, A.
dc.contributor.authorVieira, Gonçalo
dc.contributor.authorBodin, X.
dc.contributor.authorAndrés, N.
dc.contributor.authorColucci, R.R.
dc.contributor.authorGarcía-Hernández, C.
dc.contributor.authorMora, Carla
dc.contributor.authorNofre, J.
dc.contributor.authorPalacios, D.
dc.contributor.authorPérez-Alberti, A.
dc.contributor.authorRibolini, A.
dc.contributor.authorRuiz-Fernández, J.
dc.contributor.authorSarıkaya, M.A.
dc.contributor.authorSerrano, E.
dc.contributor.authorUrdea, P.
dc.contributor.authorValcárcel, M.
dc.contributor.authorWoodward, J.C.
dc.contributor.authorYıldırım, C.
dc.date.accessioned2019-07-16T11:12:45Z
dc.date.available2019-07-16T11:12:45Z
dc.date.issued2018
dc.description.abstractThe relatively warm climate conditions prevailing today in the Mediterranean region limit cold geomorphological processes only to the highest mountain environments. However, climate variability during the Late Pleistocene and Holocene has led to significant spatio-temporal variations of the glacial and periglacial domain in these mountains, including permafrost conditions. Here, we examine the distribution and evolution of permafrost in the Mediterranean region considering five time periods: Last Glaciation, deglaciation, Holocene, Little Ice Age (LIA) and present-day. The distribution of inactive permafrost-derived features as well as sedimentary records indicates that the elevation limit of permafrost during the Last Glaciation was between 1000 m and even 2000 m lower than present. Permafrost was also widespread in non-glaciated slopes above the snowline forming rock glaciers and block streams, as well as meter-sized stone circles in relatively flat summit areas. As in most of the Northern Hemisphere, the onset of deglaciation in the Mediterranean region started around 19-20 ka. The ice-free terrain left by retreating glaciers was subject to paraglacial activity and intense periglacial processes under permafrost conditions. Many rock glaciers, protalus lobes and block streams formed in these recently deglaciated environments, though most of them became gradually inactive as temperatures kept rising, especially those at lower altitudes. Following the Younger Dryas glacial advance, the Early Holocene saw the last massive deglaciation in Mediterranean mountains accompanied by a progressive shift of permafrost conditions to higher elevations. It is unlikely that air temperatures recorded in Mediterranean mountains during the Holocene favoured the existence of widespread permafrost regimes, with the only exception of the highest massifs exceeding 2500-3000 m. LIA colder climate promoted a minor glacial advance and the spatial expansion of permafrost, with the development of new protalus lobes and rock glaciers in the highest massifs. Finally, post-LIA warming has led to glacial retreat/disappearance, enhanced paraglacial activity, shift of periglacial processes to higher elevations, degradation of alpine permafrost along with geoecological changes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationOliva, M., Žebre, M., Guglielmin, M., Hughes, P. D., Çiner, A., Vieira, G., et al. (2018). Permafrost conditions in the Mediterranean region since the Last Glaciation. Earth-science reviews, 185, 397-436. https://doi.org/10.1016/j.earscirev.2018.06.018.pt_PT
dc.identifier.doi10.1016/j.earscirev.2018.06.018pt_PT
dc.identifier.issn0012-8252
dc.identifier.urihttp://hdl.handle.net/10451/39121
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0012825218301181pt_PT
dc.subjectMediterranean regionpt_PT
dc.subjectLast Glacial Maximumpt_PT
dc.subjectDeglaciationpt_PT
dc.subjectPermafrostpt_PT
dc.subjectHolocenept_PT
dc.titlePermafrost conditions in the Mediterranean region since the Last Glaciationpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage436pt_PT
oaire.citation.startPage397pt_PT
oaire.citation.titleEarth-Science Reviewspt_PT
oaire.citation.volume185pt_PT
person.familyNameOliva
person.familyNameBrito Guapo Teles Vieira
person.familyNameMora
person.givenNameMarc
person.givenNameGonçalo
person.givenNameCarla
person.identifierG-5958-2010
person.identifier.ciencia-id5510-AC71-085A
person.identifier.ciencia-id2519-6583-CAEA
person.identifier.ciencia-id0612-E2F4-590C
person.identifier.orcid0000-0001-6521-6388
person.identifier.orcid0000-0001-7611-3464
person.identifier.orcid0000-0002-0843-3658
person.identifier.ridK-5423-2014
person.identifier.ridD-2706-2012
person.identifier.scopus-author-id35225198700
person.identifier.scopus-author-id7005863976
person.identifier.scopus-author-id7102104610
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd416bf65-77f6-488e-b275-5fbb257df6d4
relation.isAuthorOfPublication7039fbb2-e1f8-4c3e-80f1-603b12d33c1c
relation.isAuthorOfPublication03524498-91a6-492e-97a2-6dbf2dd567bc
relation.isAuthorOfPublication.latestForDiscovery7039fbb2-e1f8-4c3e-80f1-603b12d33c1c

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