Paleoclimate reconstruction of the last 36 kyr based on branched glycerol dialkyl glycerol tetraethers in the Padul palaeolake record (Sierra Nevada, southern Iberian Peninsula)

• Main Authors: Rodrigo-Gámiz, M., García-Alix, A., Jiménez-Moreno, G., Ramos-Román, M.J., Camuera, J., Toney, J.L., Sachse, D., Anderson, R. Scott, Sinninghe Damsté, Jaap S.
• Other Authors: Organic geochemistry, non-UU output of UU-AW members
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2022
• Subjects: GDGTs distribution; Mean annual air temperature reconstruction; pH reconstruction; Continental sediment record; Southern Spain; Heinrich stadials; Dansgaard–Oeschger events; Dansgaard-Oeschger events
• Online Access: https://dspace.library.uu.nl/handle/1874/425477

Quantitative continental climate reconstructions covering the last glacial cycle from the Iberian Peninsula are scarce. In order to fill this gap, we obtained for the first time a high-resolution mean annual air temperature (MAAT) record based on the distribution of specific bacterial membrane lipids (i.e., branched glycerol dialkyl glycerol tetraethers; brGDGTs) from the last 36.0–4.7 kyr palaeolake record recovered by the Padul-15-05 sedimentary core (Padul, Sierra Nevada, southern Iberia). The fractional abundance of the three major groups of GDGTs present in the Padul sediments, GDGT-0, crenarchaeol and the summed brGDGTs, is comparable with that of other shallow and small (