RT Journal Article
T1 Lateglacial and Holocene palaeohydrology in the western Mediterranean region: The Lake Estanya record (NE Spain)
A1 Morellón Marteles, Mario
A1 Valero Garcés, Blas
A1 Vegas Vilarrúbia, Teresa
A1 González Sampériz, Penélope
A1 Romero, Óscar
A1 Delgado Huertas, Antonio
A1 Mata, Pilar
A1 Moreno, Ana
A1 Rico, Mayte
A1 Corella, Juan Pablo
AB The multi-proxy analysis of sediment cores recovered in karstic Lake Estanya (42°02′ N, 0°32′ E; 670 m a. s. l., NE Spain), located in the transitional area between the humid Pyrenees and the semi-arid Central Ebro Basin, provides the first high-resolution, continuous sedimentary record in the region, extending back the last 21 000 years. The integration of sedimentary facies, elemental and isotopical geochemistry and biogenic silica, together with a robust age model based on 17 AMS radiocarbon dates, enables precise reconstruction of the main hydrological and environmental changes in the region during the last deglaciation. Arid conditions, represented by shallow lake levels, predominantly saline waters and reduced organic productivity occurred throughout the last glacial maximum (21-18 cal kyrs BP) and the lateglacial, reaching their maximum intensity during the period 18-14.5 cal kyrs BP (including Heinrich event 1) and the Younger Dryas (12.9-11.6 cal kyrs BP). Less saline conditions characterized the 14.5-12.6 cal kyrs BP period, suggesting higher effective moisture during the Bölling/Allerød. The onset of more humid conditions started at 9.4 cal kyrs, indicating a delayed hydrological response to the onset of the Holocene which is also documented in several sites of the Mediterranean Basin. Higher, although fluctuating, Holocene lake levels were punctuated by a mid Holocene arid period between 4.8 and 4.0 cal kyrs BP. A major lake-level rise occurred at 1.2 cal kyrs BP, conducive to the establishment of conditions similar to the present and interrupted by a last major water level drop, occurring around 800 cal yrs BP, which coincides with the Medieval Climate Anomaly. The main hydrological stages in Lake Estanya are in phase with most Western Mediterranean and North Atlantic continental and marine records, but our results also show similarities with other Iberian and northern African reconstructions, emphasizing peculiarities of palaeohydrological evolution of the Iberian Peninsula during the last deglaciation.
PB Elsevier
SN 0277-3791, ESSN:1873-457X
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/52885
UL https://hdl.handle.net/20.500.14352/52885
LA eng
NO Comisión Interministerial de Ciencia y Tecnología
NO Diputación General de Aragón
DS Docta Complutense
RD 6 abr 2025