RT Journal Article
T1 Palaeoenvironmental changes in the Iberian central system during the Late-glacial and Holocene as inferred from geochemical data: A case study of the Navamuño depression in western Spain
A1 Turu, Valenti
A1 Carrasco González, Rosa María
A1 López Saez, José Antonio
A1 Pontevedra Pombal, Xabier
A1 De Pedraza Gilsanz, Javier
A1 Luelmo-Lautenschlaeger, Reyes
A1 Pérez Díaz, Sebastián
A1 Echeverria-Moreno, Anna
A1 Frigola, Jaime
A1 Alba-Sánchez, Francisca
A1 Sánchez Vizcaíno, Jesús
A1 Pélachs-Mañosa, Albert
A1 Cunill-Artigas, Raquel
A1 Nadal-Tersa, Jordi
A1 Mur-Cacuho, Elena
A1 Soriano-López, Joan Manuel
AB The Iberian Central System (ICS) is a clue region to reveal Mediterranean/Atlantic inferences over Iberia. We present a multidisciplinary study from western Spain conducted in the Navamuño depression (ND), covering the last 16.8 ka (cal BP). A reconstruction of the palaeotemperature from the resulting geochemical data highlights four cold and dry intervals, namely, the Oldest Dryas, Older Dryas, Intra-Allerød Cold Period (IACP), and the Younger Dryas, along with warmer intervals: the Bølling (14.7–14 ka) and the Allerød (12.9–12.6 ka); however, the Greenland Interstadial GI-1c (13.4–13.1 ka) is barely distinguishable in the ND. Despite the shortage of biomass to sustain fire, the earliest charcoals are from ~14.4–13.8 ka. Evidence of ash/dust events overprinting the geochemical background starts at ~13.8–12.8 ka. Significant fire activity in the Early Holocene at ~11.7–10.6 ka affected the ND, matching the westernmost ICS data. This period includes short oceanic spells inferred from Cl peaks at ~10.9–10.2 ka and three cold intervals at 11.4, 9.3, and 8.2 ka disrupted the progressive temperature increase. The Mid-Holocene showed a continuously increasing trend towards an arid climate, peaking at 4.2 ka under a pervasive dust influx from North Africa, which has prevailed since almost ~7.9 ka. A prominent volcanic event at ~6.8–5.8 ka is in Navamuño and Roñanzas (Asturias, N Spain; Gallego et al., 2013) identified from heavy metal-rich layer, synchronous with the last known eruption of the Calatrava volcanic field (South-Central Spain; Poblete-Piedrabuena et al., 2019). This volcanic eruption could affect many other regions half north of Iberia. The pervasive presence of oceanic aerosols in the last three millennia (2.8 ka ~ ) allowed the formation of a Cl-rich peat layer during the Ibero-Roman humid period ~2.1 ka, before a changing around ~0.4 ka toward colder and drier conditions at the Little Ice Age (LIA) period.
PB Elsevier
SN 0341-8162
YR 2021
FD 2021-12
LK https://hdl.handle.net/20.500.14352/4513
UL https://hdl.handle.net/20.500.14352/4513
LA eng
NO Ministerio de Ciencia, Innovación y Universidades
NO Andalusian Office of Economy and Knowledge
NO Spanish Ministry of Education, Culture, and Sports
DS Docta Complutense
RD 16 abr 2025