Reconstruction of late Holocene autumn/winter precipitation variability in SW Romania from a high-resolution speleothem trace element record

Warken, Sophie; Fohlmeister, Jens; Schröder‐Ritzrau, Andrea; Constantin, Silviu; Spötl, Christoph; Gerdes, Axel; Esper, Jan; Frank, Norbert; Arps, Jennifer; Terente, Mihai; Riechelmann, Dana F. C.; Mangini, Augusto; Scholz, Denis

doi:10.1016/j.epsl.2018.07.027

Cited by 55 publications

(65 citation statements)

References 43 publications

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“…We interpret the Mg/Ca decrease here as a proxy for incongruent host rock dissolution and prior calcite precipitation effect, reflecting shifts from drier to wetter conditions above the cave (Fairchild et al, 2000), while peaks in Mg/Ca coincide with the two growth discontinuities and thus dry periods. This interpretation is supported by numerous studies that showed a negative correlation between Mg/Ca ratio in stalagmite calcite and precipitation amount Flohr et al, 2017;Noronha et al, 2014;Warken et al, 2018).…”

Section: Climatic Controls Of Dcf At Moomi Cavesupporting

confidence: 67%

“…For the sample treatment in Heidelberg, approximately 80 to 120 mg of speleothem calcite were cut with a diamond wire saw or drilled along growth layers. Chemical sample preparation, U and Th purification, and mass spectrometric measurements follow the procedures described in detail in Arps (2017), Douville et al (2010), and Wefing et al (2017). Activity ratios were determined using a Thermo Fisher Neptune Plus multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) at the Institute of Environmental Physics, Heidelberg University, Germany.…”

Section: U-series Datingmentioning

confidence: 99%

“…For the OES setup, the internal 1σ standard deviation is < 1 % for Ca 2+ and Mg 2+ . Here SPS SW2 is used as a standard, and the long-term 1σ reproducibility is 2.0 % for Ca 2+ and 3.3 % for Mg 2+ (Warken et al, 2018). Comparability of the results from both setups was ensured by normalizing the Mg/Ca ratios with respect to a series of internal standard measurements that were carried out in both laboratories.…”

Section: Elemental Analysismentioning

confidence: 99%

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Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

et al. 2020

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In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of highprecision U-series and radiocarbon ( 14 C) dates. The data reveal an extreme case of very high and also climate-dependent DCF. For M1-5, an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed-system carbonate dissolution conditions. Towards the end of the last glacial period, decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and DCF as seen in stalagmites from temperate zones.

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Section: Climatic Controls Of Dcf At Moomi Cavesupporting

confidence: 67%

Section: U-series Datingmentioning

confidence: 99%

Section: Elemental Analysismentioning

confidence: 99%

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Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

et al. 2020

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“…Trace element variability in speleothems from the region provided basis for paleohydroclimate implications [10][11][12], supported the identification of historical flood events [13]. Siklósy et al [14] associated a sudden rise in rare earth elements with the Middle Bronze Age eruption of Santorini.…”

Section: Introductionmentioning

confidence: 79%

“…The relative data scarcity in the mid-Balkans ( Figure 1) could be reduced since studies have been recently published from Macedonia [50], Croatia [51] and Bosnia [52] (Table 1). Recently published records from Demänovska Valley [53]; Closani Cave [10]; Tausoare and Ascunca caves [54] are also expected to expand the data coverage for the Carpathian region.…”

Section: Distribution Of Speleothem Isotopic Records In Space and Timementioning

confidence: 99%

Speleothem Stable Isotope Records from Eastern Europe & Turkey

Kern¹,

Demény²,

Hatvani³

2018

Preprint

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The region of Eastern Europe & Turkey contributed to the SISAL (Speleothem Isotopes Synthesis and AnaLysis) global database with stable carbon- and oxygen isotope time-series from 18 entities from 14 cave systems. The currently available oldest record from this region is the ABA-2 flowstone record (Abaliget Cave; Hungary) reaching back to MIS 6. The temporal distribution of the compiled 18 entities points out a ~20-kyr-long period, centering around 100 ka, lacking speleothem stable isotope record in the region. The regional subset of SISAL_v1 records displays a continuous coverage for the past ~90 kyr for both δ18O and δ13C, with a mean temporal resolution of ~12 yr for the Holocene, and >50 yr for the pre-Holocene period. The highest temporal resolution both for the Holocene and the pre-Holocene was achieved in the So-1 record (Sofular Cave; Turkey). Assessing the data, an important split was found regarding the climatic interpretation of speleothem δ18O. While the oxygen isotope composition of more continental formations is thought to reflect mainly temperature variations and changes in moisture transport trajectories, it may strongly reflect fluctuations of precipitation amount in the southern part of the region. Variations of δ13C primarily interpreted as humidity changes reflecting dry/wet periods across the region. Elevation gradients from three non-overlapping time periods from the region - for the last 5kyr - indicated systematically prevailing elevational gradients around -0.26&permil; 100m-1 in δ18O. The regional comparison of SISAL_v1 speleothem δ18O and the temporal distribution of coarsely crystalline cryogenic cave carbonate occurrences back to 45ka does not appear to confirm the finding that occurrence of the latter coincides with the warming from stadial to interstadial conditions.

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Persistent link between Caribbean precipitation and Atlantic Ocean circulation during the Last Glacial revealed by a speleothem record from Puerto Rico

Warken

Vieten

Winter

et al. 2020

Preprint

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The sensitivity of tropical Atlantic precipitation patterns to the mean position of the Intertropical Convergence Zone (ITCZ) at different time scales is well-known. However, recent research suggests a more complex behavior of the northern hemispheric tropical rain belt related to the ITCZ in the western tropical Atlantic. Here we present a precisely dated speleothem multi-proxy record from a well-monitored cave in Puerto Rico, covering the period between 46.2 and 15.3 ka. The stable isotope and trace element records document a pronounced response of regional rainfall to abrupt climatic excursions in the North Atlantic across the Last Glacial such as Heinrich stadials and Dansgaard/Oeschger events. The annual to multidecadal resolution of the proxy time series allows substructural investigations of the recorded events. Spectral analysis suggests that multidecadal to centennial variability persisted in the regional hydroclimate mainly during interstadial conditions but also during the Last Glacial Maximum. In particular, we observe a strong agreement between the speleothem proxy data and the strength of the Atlantic meridional overturning circulation, supporting a persistent link of oceanic forcing to regional precipitation. Comparison to other paleo-precipitation records enables the reconstruction of past changes in position, strength, and extent of the ITCZ in the western tropical Atlantic in response to millennial-and orbital-scale global climate change.Plain Language Summary It is important to understand the climatic circumstances of how rainfall in the western tropical Atlantic varies under a changing climate to better manage the water supply for millions of people. However, it is not well understood how rainfall varied in the past, especially during the Last Glacial period, a time of strong climate variability and abrupt climate changes. Here, we use a stalagmite from Puerto Rico to create a new record of past changes in rainfall in this region. For this purpose, we analyzed proxy data that reveal a series of wet and dry periods during the Last Glacial corresponding to rapid global climate shifts. Our rainfall-sensitive stalagmite record captured changes of the tropical rain belt on various timescales and shows that this variability in rainfall is closely connected to changes in the strength of the ocean circulation. This suggests that the link between the ocean and the atmosphere is more robust than previously assumed. The comparison of our record with other rainfall-sensitive records from Central America and the northern Caribbean allows for a detailed reconstruction of the spatial and temporal changes of the western tropical Atlantic rain belt.

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Reconstruction of late Holocene autumn/winter precipitation variability in SW Romania from a high-resolution speleothem trace element record

Cited by 55 publications

References 43 publications

Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

Speleothem Stable Isotope Records from Eastern Europe & Turkey

Persistent link between Caribbean precipitation and Atlantic Ocean circulation during the Last Glacial revealed by a speleothem record from Puerto Rico

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Reconstruction of late Holocene autumn/winter precipitation variability in SW Romania from a high-resolution speleothem trace element record

Cited by 55 publications

References 43 publications

Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

Climate-induced speleothem radiocarbon variability on Socotra Island from the Last Glacial Maximum to the Younger Dryas

Speleothem Stable Isotope Records from Eastern Europe &amp; Turkey

Persistent link between Caribbean precipitation and Atlantic Ocean circulation during the Last Glacial revealed by a speleothem record from Puerto Rico

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Speleothem Stable Isotope Records from Eastern Europe & Turkey