Hydrological change in Southern Europe responding to increasing North Atlantic overturning during Greenland Stadial 1

Bartolomé, M. ; Moreno, A. (Universidad de Zaragoza) ; Sancho, C. (Universidad de Zaragoza) ; Stoll, H.M. ; Cacho, I. ; Spötl, C. ; Belmonte, Á. ; Edwards, R.L. ; Cheng, H. ; Hellstrom, J.C.

Resumen: Greenland Stadial 1 (GS-1) was the last of a long series of severe cooling episodes in the Northern Hemisphere during the last glacial period. Numerous North Atlantic and European records reveal the intense environmental impact of that stadial, whose origin is attributed to an intense weakening of the Atlantic Meridional Overturning Circulation in response to freshening of the North Atlantic. Recent high-resolution studies of European lakes revealed a mid-GS-1 transition in the climatic regimes. The geographical extension of such atmospheric changes and their potential coupling with ocean dynamics still remains unclear. Here we use a subdecadally resolved stalagmite record from the Northern Iberian Peninsula to further investigate the timing and forcing of this transition. A solid interpretation of the environmental changes detected in this new, accurately dated, stalagmite record is based on a parallel cave monitoring exercise. This record reveals a gradual transition from dry to wet conditions starting at 12,500 y before 2000 A.D. in parallel to a progressive warming of the subtropical Atlantic Ocean. The observed atmospheric changes are proposed to be led by a progressive resumption of the North Atlantic convection and highlight the complex regional signature of GS-1, very distinctive from previous stadial events.

Idioma: Inglés

DOI: 10.1073/pnas.1503990112

Año: 2015

Publicado en: Proceedings of the National Academy of Sciences 112, 21 (2015), 6568-6572
ISSN: 0027-8424

Factor impacto JCR: 9.423 (2015)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 4 / 62 = 0.065 (2015) - Q1 - T1

Factor impacto SCIMAGO: 6.814 - Multidisciplinary (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2009-10455-BTE
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2010-16376
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CUEVAS PPNN-258-2011

Tipo y forma: Comunicación congreso (Versión definitiva)

Área (Departamento): Área Geodinámica Externa (Dpto. Ciencias de la Tierra)