دورية أكاديمية
Paleoclimate reconstruction of the last 36 kyr based on branched glycerol dialkyl glycerol tetraethers in the Padul palaeolake record (Sierra Nevada, southern Iberian Peninsula)
| العنوان: | Paleoclimate reconstruction of the last 36 kyr based on branched glycerol dialkyl glycerol tetraethers in the Padul palaeolake record (Sierra Nevada, southern Iberian Peninsula) |
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| المؤلفون: | Rodrigo Gámiz, Marta, García-Alix, Antonio, Jiménez-Moreno, Gonzalo, Ramos Román, María J., Camuera, Jon, Toney, Jaime L., Sachse, Dirk, Anderson, R. Scott, Sinninghe Damsté, J.S. |
| المساهمون: | Ministerio de Economía y Competitividad (España), Junta de Andalucía, Universidad de Granada, Ministry of Education, Culture and Science (The Netherlands), Netherlands Organization for Scientific Research |
| بيانات النشر: | Elsevier BV |
| سنة النشر: | 2022 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | GDGTs distribution, Mean annual air temperature, reconstruction, pH reconstruction, Continental sediment record, Southern Spain, Heinrich stadials, DansgaardeOeschger events |
| الوصف: | 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 (<10 km) European lakes. Despite variations in the lithology in the studied section, the GDGT composition remains relatively stable, except for the uppermost 116 cm of the record, representing the ephemeral/emerged lake stage, which is characterized by higher crenarchaeol fractional abundances. The identification of a specific brGDGT that has only been detected in anoxic lakes provides evidence for in-situ brGDGT production in the water column and/or sediments in the Padul palaeolake. Its presence/absence probably denotes a succession of periods with a variable oxygen content in the bottom waters of the palaeolake. MAAT was reconstructed based on the distribution of brGDGTs using an African lake calibration and ranged between 12 and 20 °C. A new Bayesian calibration to mean temperature of Months Above Freezing (MAF) depicts similar temperature variations with a mean absolute difference of 0.7 °C. The MAAT reconstruction in the Padul palaeolake for the 36.0–4.7 kyr period reveals similarities with climate variability described at high-latitudes and in the westernmost Mediterranean area during this interval, showing cold conditions during the last three Heinrich Stadials and the Younger Dryas and warm conditions during the Dansgaard–Oeschger interstadials (7–1) and the Bölling-Alleröd period. Despite the more stable and warm general ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| تدمد: | 0277-3791 |
| العلاقة: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/MINECO//CGL2013-47038-R/ES/CAMBIO AMBIENTAL Y CLIMATICO EN EL SUR DE EUROPA - EL REGISTRO PALEOECOLOGICO DE PADUL, SIERRA NEVADA/; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2017-85415-R/ES/ESTUDIO DEL ULTIMO INTERGLACIAR EN PADUL COMO ANALOGO NATURAL PARA COMPRENDER CAMBIOS MEDIOAMBIENTALES FUTUROS EN EL SUR DE LA PENINSULA IBERICA (PALEODUL II)/; Publisher's version; http://dx.doi.org/10.1016/j.quascirev.2022.107434Test; Sí; Quaternary Science Reviews 281: 107434 (2022); http://hdl.handle.net/10261/357998Test |
| DOI: | 10.1016/j.quascirev.2022.107434 |
| الإتاحة: | https://doi.org/10.1016/j.quascirev.2022.107434Test http://hdl.handle.net/10261/357998Test |
| حقوق: | open |
| رقم الانضمام: | edsbas.D013714D |
| قاعدة البيانات: | BASE |
| تدمد: | 02773791 |
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| DOI: | 10.1016/j.quascirev.2022.107434 |