We present here a record of atmospheric 10Be locked in the millennial old ice deposits from Scărișoara Ice Cave, Romania. To our knowledge, our project is the very first in measuring atmospherically-produced 10Be in cave ice deposits.
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Dinaric karst belt in Croatia is besides other karst phenomena, known for caves with permanent, perennial or seasonal ice, firn and snow deposits. It is interesting that they occur on not so high b
ut orographically isolated karst plateaus, karst poljes and mountains. Recent research projects in several ice caves of Velebit and Risnjak Mts. focus on the microclimate, geomorphological processes, dating and isotope studies for obtaining information on climate changes in karst. ... [more] View project
It is a sub-project of the IAEA CRP project ‘F33021’ entitled "Application and Development of Isotope Techniques to Evaluate Human Impacts on Water balance and Nutrient Dynamics of Large River Basi
The main goal is to record the three year variation (2014-2017) of dD & d18O values of river water and d13C value of DIC (Dissolved Inorganic Carbon) and compare the data with other big rivers. ... [more] View project
An accurate picture of the spatial distribution of stable hydrogen and oxygen isotopes in modern precipitation is a prerequisite for many geographical, hydrological meteorological applications.
e primary scope of the project is to derive contiguous gridded datasets of basic isotopic characteristics (δ18O, δ2H, d-excess) of precipitation for certain European regions, primarily for the Adriatic-Pannonian domain.
Derived datasets will provide:
- a valuable input and/or auxiliary data for regional hydrological modelling (e.g. sustainable water management, water resources protection, drinking water supply),
- a basis for regional ecological modelling (e.g. wetland protection, migratory studies),
- crucial local isotopic calibration targets for palaeoclimate records (e.g. tree rings, speleothems),
- reference datasets for food authentication and traceability (e.g. wine, milk) studies.
Evaluation of the joint Hungarian-Slovenian precipitation isotope database will, for the first time, allow the estimation of the regional continental effect, an essential isotope hydrological parameter. Furthermore, the project will study the spatio-temporal variations of the radioactive hydrogen isotope (tritium, 3H) in the precipitation over the Adriatic-Pannonian domain.
Inadequate understanding of atmospheric water vapour dynamics, including continental recycling, is critical in limiting the prediction of atmospheric water cycle response to climate change. Stable oxygen and hydrogen isotopes in modern precipitation are natural tracers and supplement the limited knowledge on the hydrological cycle’s regional dynamics.
We will evaluate the precipitation stable isotope data and water-budget models jointly to derive the seasonally quantified estimates for the transpired portion of continental recycling water in the precipitation of the Hungarian-Slovenian region and will test the isotopic model in other European regions where both a dense network of precipitation stable isotope and an independent quantitative estimates of recycled moisture are available (e.g. Alps, Iberia).
As an additionally useful outcome an optimal spatial organization of the precipitation isotope monitoring networks in Hungary and Slovenia can be established on sound scientific basis. ... [more] View project
Master thesis research: ’Comparative glacio-climatological analysis of mass balance variability and relations with atmospheric circulation along the geographical margin of Europe’.
View project May 2013 · Quaternary Science Reviews Read more Article Full-text available January 2022 · Frontiers in Earth Science
Worldwide, more than 141 m of ice cores has been extracted from 20 cave ice deposits, with the drilling projects focusing mainly in Central European caves. The fact that half of the cave ice cores (3 out of 6) published in 2020 represent non-European localities, however, predicts that an increasing number of cave ice drilling projects will be carried out in the near future in other geographical
... [Show full abstract] areas hosting ice caves. Based on the gathered experience the most commonly encountered technical challenge of ice-core drilling problems in cave environment is englacial rocky/woody debris. The complex stratigraphy of cave ice deposits represents a crucial methodological problem. We propose an (Cave Ice Sedimentary Architecture and Deposition-CISAD) approach to take into consideration of the stratigraphic peculiarities of the investigated cave ice deposit and additional crucial meta-data before establishing the location of a drilling site best-suited to obtain the highest quality paleoenvironmental data. View full-text July 2009 · The Holocene
Two 2 m long ice cores (BA and BB) were extracted from the floor ice of Borştig Ice Cave in December 2005. Below a co-existing dust horizon (~13 cm underneath the 10 December 2005 ice surface) neither core presented any sign of hiatus, so the ice deposition is considered to be continuous. Tritium concentration of 94 samples from a 1.85 m long ice section were analysed by liquid scintillation
... [Show full abstract] counting technique. Samples from the lower 0.33 m of the sequence did not contain tritium above the critical level (7.2 TU). The highest value of tritium content (166.4±4.0 TU) was found at ~96 cm below the surface. This salient value is considered to be synchronous with the climax of tritium concentration in the Northern Hemisphere's atmospheric precipitation (1963). Beside this characteristic global radiochemical marker event, minor events were also detected, and dated (ie, 1954, 1958 and 1975) by corresponding peaks in the tritium concentration record of BB ice core to peaks of an estimation of tritium activity of past precipitation at Borştig Ice Cave location. The estimation was based on a data set from four nearby stations of the Global Network of Isotopes in Precipitation. The highest annual accumulation rate (6.74 cm/yr) was between 1958 and 1963 and gradually decreased to 0.54 cm/yr for the recent decades. The mean ice accumulation rate was 4.34 cm/yr over the 1954—1986 period. The estimated age at the bottom of the 21 m thick ice block assuming constant accumulation is roughly 500 years. Read more Last Updated: 04 Jul 2022
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