Isotopic characterization of cave environments at varying altitudes on the eastern Adriatic coast (Croatia) – Implications for future speleothem-based studies

Surić, Maša; Lončarić, Robert; Lončar, Nina; Buzjak, Nenad; Bajo, Petra; Drysdale, Russell N.

doi:10.1016/j.jhydrol.2016.12.051

Cited by 15 publications

(34 citation statements)

References 58 publications

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“…6) indicating that the main source of precipitation are the Atlantic air masses. That is in concordance with previous and recent regional studies which have shown that Croatia receives both Atlantic and Mediterranean moisture (Surić et al 2017).…”

supporting

confidence: 94%

“…But, since the dripwaters were collected in several caves along the eastern Adriatic coast line only once and at different seasons, such data are difficult to compare and they can not provide insight to the possible seasonal isotopic variation in the dripwater. For example, Strašna peć Cave dripwater sampled in this study (SPD-2) has δ 18 O value of −6.82 ‰, which is in very good agreement with mean δ 18 O value of −6.7 ‰ obtained from two year (2013−2015) cave monitoring in Strašna peć (Surić et al 2017). Since the first monitoring was performed during the short summer/autumn period δD is 5 ‰ lower than mean 2013−2015 value.…”

supporting

confidence: 86%

“…Recent study of Surić et al (2017) provided comprehensive study of precipitation and cave dripwater isotopic composition, drip rates and modern calcite stable isotope content based on two year monitoring and confirmed mutual influences of Atlantic and Mediterranean air masses on precipitation evident at study sites in the north Dalmatian islands, coast and mountain range. (Fig.…”

mentioning

confidence: 66%

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Early and mid-holocene environmental conditions in the eastern Adriatic recorded in speleotherms from Mala Špilja cave and Velika Špilja cave (Mljet island, Croatia)

Lončar

Bar‐Matthews²,

Avalon³

et al. 2017

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supporting

confidence: 94%

supporting

confidence: 86%

mentioning

confidence: 66%

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Early and mid-holocene environmental conditions in the eastern Adriatic recorded in speleotherms from Mala Špilja cave and Velika Špilja cave (Mljet island, Croatia)

Lončar

Bar‐Matthews²,

Avalon³

et al. 2017

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“…Nevertheless, even with the contemporary fracture flow, oxygen and hydrogen isotope composition of drip water significantly differ from the rainwater composition in sense that the isotopic signal is well buffered, and very close to the MP2 values which is characterized with stable discharge (Surić et al 2017a). Given the similarity with the average rainwater isotopic composition, water in the epikarst apparently stays long enough to homogenize without discernible fractionation.…”

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

confidence: 94%

“…7). For the comparison, MP2 site had relatively low and quite stable discharge with only a weak response to the rain events, as requisited (Surić et al 2017a). Luckily, subsequent stable isotope analyses showed that the major part of MP3 stalagmite grew under a stable conditions regarding the drip rate and isotopic composition.…”

Section: Speleothem Sampling Limitationmentioning

confidence: 96%

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

Surić

2017

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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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Effect of water excess on soil carbon dioxide, seepage water chemistry, and calcite speleothem growth: An experimental and modelling approach

Lang

Faimon

2020

Hydrological Processes

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The effect of the water excess in soil on soil gaseous carbon dioxide concentrations (c CO2) was studied based on field experiments. The gradual water addition of 15 and 30 L m −2 to leptosols and anthrosols, simulating 15 and 30 mm precipitation, respectively, caused the overall c CO2 increase of 1.53 × 10 −1 mol m −3 (increase by 60%) and 1.61 × 10 −1 mol m −3 (increase by 112%) in the soil airs. The effect of the c CO2 increment on seepage water, cave dripwater chemistry, and calcite speleothem overgrowths was deduced from geochemical modelling. It showed that the c CO2 increments may lead to the increments in total dissolved carbon, aqueous calcium, and dissolved solids of 1.10 × 10 −3 mol L −1 (increase by 35%), 4.45 × 10 −4 mol L −1 (increase by 30%), and 1.55 × 10 −3 mol L −1 (increase by 34%), respectively. After the total degassing of CO 2 in the cave, the increment in the saturation index of dripwater, SI, could reach up to ΔSI = 0.31, which means an increase by hundreds of percent. The water excess of 5 L m −2 following a dry period would cause the increment in saturation index ΔSI = 0.17. The modelling further showed that the c CO2 increase associated with the 30 L m −2 water excess could induce the calcite overgrowth up to 1 μm thick per 1 m 2 surface area. The effect of water excess with additional water supplies gradually weakens, probably due to reduced CO 2 diffusivity and soil microorganism activity. It can be assumed that the most contrasting peaks in dripwater chemistry are associated with the individual precipitation events after short dry periods. The increased supersaturation of dripwater is expected to lead to faster growth of speleothem and changes in calcite textures. K E Y W O R D S calcite speleothem overgrowth, field experiment, geochemical modelling, seepage water chemistry, soil CO 2 concentration, soil water excess Abbreviations symbols and acronyms: [Ca] T , total concentration of dissolved calcium; c CO2 , concentration of gaseous carbon dioxide; CO 2 , carbon dioxide; DLI, daylight illuminance; H 2 O, water; K, equilibrium constant; L, litre; P, barometric pressure; P CO2 , carbon dioxide partial pressure; P CO2(cave) , carbon dioxide partial pressure in cave atmosphere; P CO2(soil) , carbon dioxide partial pressure in soil atmosphere;

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Isotopic characterization of cave environments at varying altitudes on the eastern Adriatic coast (Croatia) – Implications for future speleothem-based studies

Cited by 15 publications

References 58 publications

Early and mid-holocene environmental conditions in the eastern Adriatic recorded in speleotherms from Mala Špilja cave and Velika Špilja cave (Mljet island, Croatia)

Early and mid-holocene environmental conditions in the eastern Adriatic recorded in speleotherms from Mala Špilja cave and Velika Špilja cave (Mljet island, Croatia)

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

Effect of water excess on soil carbon dioxide, seepage water chemistry, and calcite speleothem growth: An experimental and modelling approach

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