Climate variability on the Adriatic seaboard during the last glacial inception and MIS 5c from Frasassi Cave stalagmite record

Vanghi, Valentina; Borsato, Andrea; Frisia, Silvia; Drysdale, Russell N.; Hellström, John; Bajo, Petra

doi:10.1016/j.quascirev.2018.10.023

Cited by 12 publications

(8 citation statements)

References 84 publications

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“…ECHAM5-wiso was run for 1958-2013 using an implicit nudging technique to constrain simulated fields of surface pressure, temperature, divergence and vorticity to the corresponding ERA-40 and ERA-Interim reanalysis fields (Butzin et al, 2014). The midHolocene simulation (Wackerbarth et al, 2012) was forced by orbital parameters and greenhouse gas concentrations appropriate to 6 ka following the PMIP3 protocol (https://pmip3.lsce.ipsl.fr, last access: 2 August 2019). The control simulation has modern values for the orbital parameters and greenhouse gas (GHG) concentrations (Wackerbarth et al, 2012).…”

Section: Model Simulationsmentioning

confidence: 99%

“…The midHolocene simulation (Wackerbarth et al, 2012) was forced by orbital parameters and greenhouse gas concentrations appropriate to 6 ka following the PMIP3 protocol (https://pmip3.lsce.ipsl.fr, last access: 2 August 2019). The control simulation has modern values for the orbital parameters and greenhouse gas (GHG) concentrations (Wackerbarth et al, 2012). The change in sea surface temperatures (SSTs) and sea ice cover between 6 ka and the pre-industrial period were calculated from 50-year averages from each interval extracted from a transient Holocene simulation performed with the fully coupled ocean-atmosphere Community Climate System Model (CCSM3; Collins et al, 2006).…”

Section: Model Simulationsmentioning

confidence: 99%

“…The change in sea surface temperatures (SSTs) and sea ice cover between 6 ka and the pre-industrial period were calculated from 50-year averages from each interval extracted from a transient Holocene simulation performed with the fully coupled ocean-atmosphere Community Climate System Model (CCSM3; Collins et al, 2006). The anomalies were then added to the observed modern SST and sea ice cover data to force the midHolocene simulation (Wackerbarth et al, 2012). For the lgm experiment (Werner et al, 2018), orbital parameters, GHG concentrations, land-sea distribution, and ice sheet height and extent followed the PMIP3 guidelines.…”

Section: Model Simulationsmentioning

confidence: 99%

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Evaluating model outputs using integrated global speleothem records of climate change since the last glacial

et al. 2019

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Abstract. Although quantitative isotope data from speleothems has been used to evaluate isotope-enabled model simulations, currently no consensus exists regarding the most appropriate methodology through which to achieve this. A number of modelling groups will be running isotope-enabled palaeoclimate simulations in the framework of the Coupled Model Intercomparison Project Phase 6, so it is timely to evaluate different approaches to using the speleothem data for data–model comparisons. Here, we illustrate this using 456 globally distributed speleothem δ18O records from an updated version of the Speleothem Isotopes Synthesis and Analysis (SISAL) database and palaeoclimate simulations generated using the ECHAM5-wiso isotope-enabled atmospheric circulation model. We show that the SISAL records reproduce the first-order spatial patterns of isotopic variability in the modern day, strongly supporting the application of this dataset for evaluating model-derived isotope variability into the past. However, the discontinuous nature of many speleothem records complicates the process of procuring large numbers of records if data–model comparisons are made using the traditional approach of comparing anomalies between a control period and a given palaeoclimate experiment. To circumvent this issue, we illustrate techniques through which the absolute isotope values during any time period could be used for model evaluation. Specifically, we show that speleothem isotope records allow an assessment of a model's ability to simulate spatial isotopic trends. Our analyses provide a protocol for using speleothem isotope data for model evaluation, including screening the observations to take into account the impact of speleothem mineralogy on δ18O values, the optimum period for the modern observational baseline and the selection of an appropriate time window for creating means of the isotope data for palaeo-time-slices.

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Section: Model Simulationsmentioning

confidence: 99%

Section: Model Simulationsmentioning

confidence: 99%

Section: Model Simulationsmentioning

confidence: 99%

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Evaluating model outputs using integrated global speleothem records of climate change since the last glacial

et al. 2019

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“…This agreement is supported by a ~ 0.8‰ enrichment in δ 18 Opf of a Mediterranean sediment core, LC21, in Figure 6g ( Bar-Matthews et al, 2003;Grant et al, 2012), as the concurrent decrease of NHSI led to a weakened African monsoon that reduced the proportion of freshwater with depleted-18 O in the Mediterranean Sea at the end of S3 (Rohling et al, 2015). Another possibility is an increase in Mediterranean-sourced moisture at the Monaco cave when the NHSI shifted the intertropical convergent zone southward, promoting more southerly water advections in southern Europe (Vanghi et al, 2018;Columbu et al, 2019) 4.4. Multi-centennial dry events of early MIS 5a Both OV12-5 δ 18 O and δ 13 C series are characterized by four concurrent multi-centennial high-value intervals, centered at 83.1 ± 0.1, 82.4 ± 0.1, 81.6 ± 0.1, and 80.7 ± 0.1 ka (Fig.…”

Section: Circum-mediterranean Climate Patterns During Mis 5b-5amentioning

confidence: 98%

Stalagmite-inferred European westerly drift in the early Weichselian with centennial-scale variability in marine isotope stage 5a

Chung

Menviel

Marchionne

et al. 2022

Quaternary Science Reviews

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“…Cave secondary deposits offer the opportunity to investigate past hydrological changes, at times demonstrating climate forcing (Fairchild et al, 2006). Accordingly, numerous studies have been carried from northern (Frisia et al, 2005;Zanchetta et al, 2007;Drysdale et al, 2009;Belli et al, 2013;Columbu et al, 2018;Regattieri et al, 2019) to central (Vanghi et al, 2018), southern (Columbu et al, 2020) and insular (Frisia et al, 2006;Columbu et al, 2017Columbu et al, , 2019 Italy. Indeed, with constant temperature and absence of light, cave environments offer ideal conditions to study various topics, like paleoenvironmental and climate change, the origin and evolution of life, and bio-mineralization processes, among others.…”

Section: Introductionmentioning

confidence: 99%

Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis

et al. 2021

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Caves are dark subsurface environments with relatively constant temperatures that allow studying bio-mineralization processes and paleoenvironmental or climate changes in optimal conditions. In the extreme and oligotrophic cave environment, manganese patinas having stromatolite-like features are uncommon. Here we provide the first detailed mineralogical, geochemical, and microbiological investigation of fine-grained and poorly crystalline MnFe stromatolite-like wall patinas formed in a deep-cave environment in Italy. These mineralizations, about 3 mm thick, consist of an alternation of Mn-layers and Fe-lenses. We show that the microbial communities' composition is dominated by Mn-oxidizing bacteria, such as Bacillus, Flavobacterium, and Pseudomonas. Our multidisciplinary investigation, integrating data from different analytical techniques (i.e., optical microscopy, SEM-EDS, μXRF, XRPD, FT-IR, Raman spectroscopy, and DNA sequencing), revealed peculiar chemical, mineralogical, and biological features: 1) A cyclical oscillation of Mn and Fe along the growth of the patinas. We propose that this oscillation represents the shift between oxic and suboxic conditions related to different phases occurring during paleo-flood events; 2) A typical spatial distribution of mineralogy and oxidation state of Mn, bacterial imprints, detrital content, and stromatolite-like morphologies along the Mn-layers. We propose that this distribution is controlled by the local hydraulic regime of the paleo-floods, which, in turn, is directly related to the morphology of the wall surface. Under less turbulent conditions, the combination of clay mineral catalysis and biological oxidation produced vernadite, a poor-crystalline phyllomanganate with a low average oxidation state of Mn, and branched columnar stromatolite-like morphologies. On the other hand, under more turbulent conditions, the sedimentation of clay minerals and microbial communities' development are both inhibited. In this local environment, a lower oxidation rate of Mn2+ favored the formation of todorokite and/or ranciéite, two compounds with a high average oxidation state of Mn, and flat-laminated or columnar stromatolite-like morphologies.

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Climate variability on the Adriatic seaboard during the last glacial inception and MIS 5c from Frasassi Cave stalagmite record

Cited by 12 publications

References 84 publications

Evaluating model outputs using integrated global speleothem records of climate change since the last glacial

Evaluating model outputs using integrated global speleothem records of climate change since the last glacial

Stalagmite-inferred European westerly drift in the early Weichselian with centennial-scale variability in marine isotope stage 5a

Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis

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