Monitoring of selected caves as a prerequisite for the speleothem-based reconstruction of the Quaternary environment in Croatia

Surić, Maša; Lončarić, Robert; Bočić, Neven; Lončar, Nina; Buzjak, Nenad

doi:10.1016/j.quaint.2017.06.042

Cited by 14 publications

(17 citation statements)

References 53 publications

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“…Moreover, calcareous cave deposits exceeding the current limit of applicability of U-Th dating method can be found in the region [58]. However, recently this knowledge-gap began to be filled by speleological monitoring studies becoming abundant in the region [10,[74][75][76][77][78][79][80]. This predicts that much more experimental experience is being made available to help the interpretation of the speleothem recorded geochemical signatures over the region in the forthcoming studies.…”

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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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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“…Since the wavelet functions are normalized to have unit energy, the obtained wavelet transforms may even be compared with other time series (Torrence and Compo, 1998).…”

Section: Wavelet Transform Coherencementioning

confidence: 99%

“…Any of the previously mentioned proxies can be used in paleoclimate evaluation, assuming that a clear relationship between climate conditions and measured proxy values can be determined and described. To assist in the interpretation of the geochemical and stable isotope composition of speleothems, the most frequently used and widely accepted method is cave monitoring, in which the physical and chemical parameters of the cave environment and carbonate precipitation are determined in a multi-year study (e.g., Breitenbach et al, 2015;Mattey et al, , 2016Surić et al, 2018;Riechelmann et al, 2011). These can be used in forward modeling to quantify and understand the role of the dominant factors regulating the geochemical signal in speleothems (Baker and Bradley, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…If compared with climate parameters, such data can serve as benchmark records, whose comparison may elucidate regional proxy correlations, or can be used to test complex climate models (Wackerbarth et al, 2012). The comparison can be made visually, but detailed statistical data processing (e.g., Baker et al, 2015;von Gunten et al, 2012;Wassenburg et al, 2016) can provide much more objective results.…”

Section: Introductionmentioning

confidence: 99%

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Speleothem stable isotope records for east-central Europe: resampling sedimentary proxy records to obtain evenly spaced time series with spectral guidance

Hatvani

Kern

Leél-Őssy

et al. 2018

Earth Syst. Sci. Data

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Abstract. Uneven spacing is a common feature of sedimentary paleoclimate records, in many cases causing difficulties in the application of classical statistical and time series methods. Although special statistical tools do exist to assess unevenly spaced data directly, the transformation of such data into a temporally equidistant time series which may then be examined using commonly employed statistical tools remains, however, an unachieved goal. The present paper, therefore, introduces an approach to obtain evenly spaced time series (using cubic spline fitting) from unevenly spaced speleothem records with the application of a spectral guidance to avoid the spectral bias caused by interpolation and retain the original spectral characteristics of the data. The methodology was applied to stable carbon and oxygen isotope records derived from two stalagmites from the Baradla Cave (NE Hungary) dating back to the late 18th century. To show the benefit of the equally spaced records to climate studies, their coherence with climate parameters is explored using wavelet transform coherence and discussed. The obtained equally spaced time series are available at https://doi.org/10.1594/PANGAEA.875917.

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“…According to the afterwards recorded drip rate, only so-called NG3 stalagmite (left one in Fig. 8), the one with the most stable discharge (Surić et al 2017b), was collected for the analyses with strong confidence that speleothem with such stable drip rate would provide an attenuated signal of rainwater isotope composition, and presumably spelean calcite deposited in isotopic equilibrium with the dripwater. Although this cave abounds in numerous well-developed stalagmites, our intention is always to minimize the damage by taking out only the most promising ones.…”

Section: Fig 4: Water Collector In Front Of Spilja U Zubu Buljme Cavmentioning

confidence: 99%

Challenges in cave monitoring and sampling – experiences from speleothem-based researches in Croatian caves

Surić

2017

Self Cite

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IzvlečekUDK 551.435.84(497.5) Maša Surić: Izzivi monitoringa in vzorčenja v kraških jamah -izkušnje pri raziskavah sig na Hrvaškem Z namenom rekonstrukcije kvartarnega okolja v Dinarskem krasu že več let raziskujemo sige iz hrvaških kraških jam. Ker je interpretacija zapisov paleo-okolja v sigah močno odvisna od dobrega poznavanja in razumevanja procesov, ki povezujejo atmosfero, hidrologijo in sige, je zelo pomemben tudi monitoring recentnega jamskega okolja. čeprav so postopki vzorčenja in meritev relativno preprosti, pri delu vseeno srečujemo številne probleme, povezane z naravnimi in tehničnimi vzroki. Izjemne vremenske razmere, kot so intenzivne padavine, suša in sneg, lahko povzročijo izgube vzorcev. Po drugi strani zaradi tehničnih izpadov delovanja opreme izgubljamo pridobljene podatke. Redkeje, a vseeno, lahko pridobivanje vzorcev in podatkov ogrozijo tudi jamske živali. čeprav vseh teh pojavov ne moremo izključiti, lahko njihove negativne vplive minimiziramo, tehnične težave pa v veliki meri rešimo. V članku predstavimo težave in njihovo reševanje pri raziskavah v hrvaških jamah. Ključne besede: jama, kras, jamski monitoring, vzorčenje, Hrvaška. Speleothem-based research aimed at the reconstruction of the quaternary environment in Dinaric karst has been conducted in several Croatian caves. As the interpretation of the palaeoenvironmental signal archived in speleothems relies on identifying and understanding processes between atmosphere and cave precipitates, especially hydrological behaviour, cave monitoring is crucial. Despite relatively simple sampling and monitoring protocols, series of problems and complications has arisen, caused by different natural and technical reasons. Extreme weather events such as enormous precipitation, prolonged drought or snow drifts, each in their own way can cause sample loss. On the other hand, technical issues associated with equipment failures can lead to irretrievable data loss, and even biological threats, both man-induced and of natural origin, can occur. Although the later cannot be eliminated, as well as extreme weather, gained experience substantially helps to minimize negative effects. On the other hand, most of the technical issues are resolvable, and suggested solutions have been regularly implemented.

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Monitoring of selected caves as a prerequisite for the speleothem-based reconstruction of the Quaternary environment in Croatia

Cited by 14 publications

References 53 publications

Speleothem Stable Isotope Records from Eastern Europe & Turkey

Speleothem Stable Isotope Records from Eastern Europe & Turkey

Speleothem stable isotope records for east-central Europe: resampling sedimentary proxy records to obtain evenly spaced time series with spectral guidance

Challenges in cave monitoring and sampling – experiences from speleothem-based researches in Croatian caves

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Monitoring of selected caves as a prerequisite for the speleothem-based reconstruction of the Quaternary environment in Croatia

Cited by 14 publications

References 53 publications

Speleothem Stable Isotope Records from Eastern Europe &amp; Turkey

Speleothem Stable Isotope Records from Eastern Europe &amp; Turkey

Speleothem stable isotope records for east-central Europe: resampling sedimentary proxy records to obtain evenly spaced time series with spectral guidance

Challenges in cave monitoring and sampling – experiences from speleothem-based researches in Croatian caves

Contact Info

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Speleothem Stable Isotope Records from Eastern Europe & Turkey

Speleothem Stable Isotope Records from Eastern Europe & Turkey