Isotopic composition of precipitation in Portorož (Slovenia)

Vreča, Polona; Bronić, Ines Krajcar; Leis, Albrecht

doi:10.5474/geologija.2011.010

Cited by 13 publications

(17 citation statements)

References 14 publications

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“…No significant correlation was observed between δ 18 O and P. This was expected for the midlatitude continental station of Zagreb, which had an expressed seasonality in temperature (Figure 8b) and δ 18 O values ( Figure 10a) and a lack of clear seasonality in precipitation amount (Figure 8a) [4]. No amount effect was observed or reported for stations in Croatia and Slovenia [17,47,62,[70][71][72][73].…”

Section: Trends In Stable Isotope Datamentioning

confidence: 70%

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Long-Term Isotope Records of Precipitation in Zagreb, Croatia

Bronić

Barešić

Borković

et al. 2020

Water

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The isotope composition of precipitation has been monitored in monthly precipitation at Zagreb, Croatia, since 1976. Here, we present a statistical analysis of available long-term isotope data (3H activity concentration, δ2H, δ18O, and deuterium excess) and compare them to basic meteorological data. The aim was to see whether isotope composition reflected observed climate changes in Zagreb: a significant increase in the annual air temperature and larger variations in the precipitation amount. Annual mean δ18O and δ2H values showed an increase of 0.017‰ and 0.14‰ per year, respectively, with larger differences in monthly mean values in the first half of the year than in the second half. Mean annual d-excess remained constant over the whole long-term period, with a tendency for monthly mean d-excess values to decrease in the first half of the year and increase in the second half due to the influence of air masses originating from the eastern Mediterranean. Changes in the stable isotope composition of precipitation thus resembled changes in the temperature, the circulation pattern of air masses, and the precipitation regime. A local meteoric water line was obtained using different regression methods, which did not result in significant differences between nonweighted and precipitation-weighted slope and intercept values. Deviations from the Global Meteoric Water Line GMWL (lower slopes and intercepts) were observed in two recent periods and could be explained by changes in climate parameters. The temperature gradient of δ18O was 0.33‰/°C. The tritium activity concentrations in precipitation showed slight decreases during the last two decades, and the mean A in the most recent period, 2012–2018, was 7.6 ± 0.8 Tritium Units (TU).

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Section: Trends In Stable Isotope Datamentioning

confidence: 70%

“…Details on sampling sites are presented in Table S1. Some projects have also included monitoring at stations in Slovenia (location numbers 13 to 15, Figure 1), e.g., in Ljubljana [47,62,[69][70][71], Portorož, and Kozina [47,72,73]. Table S1.…”

Section: Sampling Sites and Climatementioning

confidence: 99%

Long-Term Isotope Records of Precipitation in Zagreb, Croatia

Bronić

Barešić

Borković

et al. 2020

Water

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“…This may suggest a small evaporative loss of lighter isotopes may have occurred. The regional meteoric water line shown in the figure was developed from analyses of deuterium and oxygen-18 from 449 GNIP samples that had been collected during 1981-2010 at Ljubljana [20], during 2000-2006 in Portorož [21], and during 2000-2003 in Kozina [22]. The regional meteoric water line is described by the equation of D = 7.9* 18 O + 9 (r 2 = 0.97) and is very similar to the global meteoric water line of D = 8* 18 The δD and δ 18 O of all ice samples fall close to the regional meteoric water line ( Figure 6).…”

Section: Resultsmentioning

confidence: 99%

“…Plot of D and  18 O of ice samples from Paradana Cave and Snežna Cave plotted with the regional meteoric water line developed from GNIP samples collected in Ljubljana[20], Portorož[21], and Kozina[22].…”

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confidence: 99%

Glaciochemistry of Cave Ice: Paradana and Snežna Caves, Slovenia

et al. 2019

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Cave ice samples collected within karstic terrain have major ion and nutrient concentrations showing that the ice originates from local precipitation modified by the addition of Ca2+ and HCO3− from the dissolution of the local bedrock. Isotopic profiles of Paradana Cave ice are similar to those described in other ice caves in central and eastern Europe, where the profiles are developed through the freezing of cave pool or “lake” waters from the top downward during the onset of the cold portion of the year. Stable isotope data suggest future studies may yield a long-term paleo-environmental record for this location.

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“…Within the three-year project, in total, a 125 water samples from surface, cave and spring waters as well as the waters of the piezometers were collected for the isotope analysis of δ 18 Isotopic composition of δ 18 O in precipitation is predominantly more depleted (more negative) during colder months (winter) and enriched in the summer. Measured values indicate that the isotopic composition of observed precipitations falls on the Global Meteoric Water Line (GMWL) defined by Craig [67] and various Local Meteoric Water Lines (LMWLs) defined for Italy [68] and Slovenia (locations Kozina and Portorož [69,70]) and are always plotted below the Eastern Mediterranean Meteoric Water Line (EMMWL, [71]). The minimum d-excess value found in the study area is 7.0‰ measured in May 2014 at Randaccio and a maximum value of 14.8‰ measured in November 2013 at Sela na Krasu (Figure 2, Table 2).…”

Section: Water Chemistrymentioning

confidence: 99%

Groundwater Characterization by Means of Conservative (δ18O and δ2H) and Non-Conservative (87Sr/86Sr) Isotopic Values: The Classical Karst Region Aquifer Case (Italy–Slovenia)

et al. 2018

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The study of the different hydrogeological compartments is a prerequisite for understanding and monitoring different fluxes, thereby evaluating the environmental changes in an ecosystem where anthropogenic disturbances are present in order to preserve the most vulnerable groundwaters from contamination and degradation. In many karst domains in the Mediterranean, areas groundwaters and surface waters are a single system, as a result of the features that facilitate the ingression of waters from surface to subsurface. This is also the case for the Classical Karst hydrostructure, which is a carbonate plateau that rises above the northern Adriatic Sea, shared between Italy and Slovenia. The main suppliers to the aquifer are the effective precipitations and the waters from three different rivers: Reka/Timavo, Soča/Isonzo and Vipava/Vipacco. Past and ongoing hydrogeological studies on the area have focused on the connections within the Classical Karst Region aquifer system through the analysis of water caves and springs hydrographs and chemographs. In this paper, the authors present new combined data from major ions, oxygen, hydrogen and strontium stable and radiogenic isotopes which have allowed a more complementary knowledge of the groundwater circulation, provenance and water-rock interactions. All the actions occurred in the framework of the European project HYDROKARST.

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Isotopic composition of precipitation in Portorož (Slovenia)

Cited by 13 publications

References 14 publications

Long-Term Isotope Records of Precipitation in Zagreb, Croatia

Long-Term Isotope Records of Precipitation in Zagreb, Croatia

Glaciochemistry of Cave Ice: Paradana and Snežna Caves, Slovenia

Groundwater Characterization by Means of Conservative (δ18O and δ2H) and Non-Conservative (87Sr/86Sr) Isotopic Values: The Classical Karst Region Aquifer Case (Italy–Slovenia)

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