Younger Dryas to Early Holocene paleoclimate in Cantabria (N Spain): Constraints from speleothem Mg, annual fluorescence banding and stable isotope records

Rossi, Carlos; Bajo, Petra; Lozano, Rafael P.; Hellström, John

doi:10.1016/j.quascirev.2018.05.025

Cited by 33 publications

(55 citation statements)

References 59 publications

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“…Lake basin records from this region, when examined at a sufficiently high temporal and stratigraphic resolution, are revealing that the interval between ~12.9 and 11.7 ka BP was probably two-phased, with a significant shift in prevailing climatic conditions in the middle of the interval (Bakke et al 2009;Neugeberger et al, 2012;Lane et al, 2013). A two-phased pattern for this period has also been detected in a number of speleothem records from the Iberian peninsula, the timing of the phase change generally dating to between ~12.5 and ~12.15 ka BP (Baldini et al, 2015;Bartolomé et al, 2015;Rossi et al, 2018). This regional change appears to reflect migration of the North Atlantic Polar Front (NAPF), long considered a major factor determining the prevailing climatic conditions in Europe during the late Quaternary (e.g.…”

Section: 3mentioning

confidence: 72%

On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance

Lowe

Matthews

Mayfield

et al. 2019

Quaternary Science Reviews

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Section: 3mentioning

confidence: 72%

On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance

Lowe

Matthews

Mayfield

et al. 2019

Quaternary Science Reviews

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“…The redder colour also seems to indicate warmer conditions that would justify the Bølling-Allerød episode before the Younger Dryas (14.612.0 ky. BP) according to ice-cores in Greenland (Rasmussen et al 2014). This warmer conditions were detected between 12.9 and 11.6 ky. BP in the speleothems of Soplao Cave, 30 km to the north (Rossi et al, 2018).…”

Section: Figura 5 Comparación Del Depósito Ac Con Otros Depósitos Enmentioning

confidence: 99%

Chronology of geomorphological changes in a cantabrian mountain valley over the last 20,000 years.

Pisabarro¹,

Cañadas²

2020

CyG

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This is an in-depth study of a mixed deposit of terrace and alluvial fan in a valley of the Cantabrian Mountains that aims to characterize environmental conditions during the period following the Last Glacial Maximum (LGM) at the end of the Pleistocene and the entire Holocene, including human influence to the present day. In this perspective, the lithostratigraphy of different layers was described, the granulometric analysis performed in situ and in the laboratory, the organic bulk sediment dated by radiocarbon and weight, and other empirical studies, such as paleomagnetism were performed. The results reveal a temporal sequence of deposition from around 19.4 ky BP to the present showing different sedimentary environments. Paleoclimatical scientific literature in sorrounding areas complemented the interpretation of the results e.g. pleistocene glaciers, speleothems, palynology and geomorphology. We conclude a completely diferent evolution of studied section between Late-Pleistocene and Holocene. Bottom layers, composed of coarse boulders, are interpreted in the context of a second glacial push after the Local Last Glacial Maximum under conditions of torrentiality. In the upper layers, in the Holocene, there was an increase in sedimentation from slopes through alluvial and colluvial cones, and rivers lost their capacity to transport these sediments. Important environmental changes in the Middle Holocene, 5.5 ky BP, were detected with possible evidence of human action. A decrease from that moment in the deposited sediment caliber was verified.

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“…Speleothem carbon isotope (δ 13 Cspel) records from the temperate region of Western Europe are often clearly correlated to regional temperature reconstructions during the last glacial (Genty et al, 2003) and the deglaciation (Baldini et al, 2015;Denniston et al, 2018;Genty et al, 2006;Rossi et al, 2018;Verheyden et al, 2014) (Fig. 1).…”

Section: Introductionmentioning

confidence: 97%

“…A -Records vs age, colour coded by cave. Villars Cave -stalagmites Vil-stm11 (Genty et al, 2006) and Vil-car-1 (Wainer et al, 2011); Chauvet Cave -stalagmite Chau-stm6 (Genty et al, 2006); El Pindal Cave -stalagmite Candela stalagmite GAR-01 (Baldini et al, 2015); El Soplao Cave -stalagmite SIR-1 (Rossi et al, 2018); Père Noël Cave -stalagmite PN-95-5 (Verheyden et al, 2014); Buraca Gloriosa -stalagmite BG6LR (Denniston et al, 2018). All stalagmite data was extracted from the SISAL database, version 2 (Comas-Bru et al, 2020b, 2020a.…”

Section: Introductionmentioning

confidence: 99%

Stalagmite carbon isotopes suggest deglacial increase in soil respiration in Western Europe driven by temperature change

Lechleitner¹,

Day²,

Kost³

et al. 2020

Preprint

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The temperate region of Western Europe underwent dramatic climatic and environmental change during the last deglaciation. Much of what is known about the terrestrial ecosystem response to deglacial warming stems from pollen preserved in sediment sequences, providing information on vegetation composition. Other ecosystem processes, such as soil respiration, remain poorly constrained over past climatic transitions, but are critical for understanding the global carbon cycle and its response to ongoing anthropogenic warming. Here we show that speleothem carbon isotope (δ 13 Cspel) records may retain information on local soil respiration, and allow its reconstruction over time. While this notion has been proposed in the past, our study is the first to rigorously test it, using a combination of multi-proxy geochemical analysis (δ 13 C, Ca isotopes, and radiocarbon) on three speleothems from Northern Spain, and quantitative forward modelling of processes in soil, karst, and cave. Our study is the first to quantify and remove the effects of prior calcite precipitation (PCP, using Ca isotopes) and bedrock dissolution (using the radiocarbon reservoir effect) from the δ 13 Cspel signal to derive changes in respired δ 13 C. Coupling of soil gas pCO2 and δ 13 C via a mixing line describing diffusive gas transport between an atmospheric and a respired end member allows modelling of changes in soil respiration in response to temperature. Using this coupling and a range of other parameters describing carbonate dissolution and cave atmospheric conditions, we generate large simulation ensembles from which the results most closely matching the measured speleothem data are selected. Our results robustly show that an increase in soil pCO2 (and thus respiration) is needed to explain the observed deglacial trend in δ 13 Cspel. However, the Q10 (temperature sensitivity) derived from the model results is higher than current measurements, suggesting that part of the signal may be related to a change in the composition of the soil respired δ 13 C, likely from changing substrate through increasing contribution from vegetation biomass with the onset of the Holocene. Supplementary material Stalagmite carbon isotopes suggest temperature controlling a deglacial increase in soil respiration in Western Europe

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Younger Dryas to Early Holocene paleoclimate in Cantabria (N Spain): Constraints from speleothem Mg, annual fluorescence banding and stable isotope records

Cited by 33 publications

References 59 publications

On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance

On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance

Chronology of geomorphological changes in a cantabrian mountain valley over the last 20,000 years.

Stalagmite carbon isotopes suggest deglacial increase in soil respiration in Western Europe driven by temperature change

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