@article{MTMT:3181491, title = {Last 1000 years of environmental history in Southern Bucovina, Romania; a high resolution multi-proxy lacustrine archive}, url = {https://m2.mtmt.hu/api/publication/3181491}, author = {Florescu, G and Hutchinson, S M and Kern, Zoltán and Mindrescu, M and Cristea, I A and Mihaila, D and Feurdean, A}, doi = {10.1016/j.palaeo.2017.01.047}, journal-iso = {PALAEOGEOGR PALAEOCL}, journal = {PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY}, volume = {473}, unique-id = {3181491}, issn = {0031-0182}, year = {2017}, eissn = {1872-616X}, pages = {26-40}, orcid-numbers = {Kern, Zoltán/0000-0003-4900-2587} } @article{MTMT:2999012, title = {Sediment dynamics and heavy metal pollution history of the Cruhlig Lake (Danube Delta, Romania)}, url = {https://m2.mtmt.hu/api/publication/2999012}, author = {Begy, Róbert-Csaba and Preoteasa, L and Timar-Gabor, A and Mihăiescu, R and Tănăselia, C and Kelemen, S and Simon, H}, doi = {10.1016/j.jenvrad.2015.12.020}, journal-iso = {J ENVIRON RADIOACTIV}, journal = {JOURNAL OF ENVIRONMENTAL RADIOACTIVITY}, volume = {153}, unique-id = {2999012}, issn = {0265-931X}, abstract = {This is the first study reporting recent sedimentation rates data (e.g. the past 120-150 years) for the Cruhlig Lake situated in the Danube Delta. The aim of this study is to analyse the recent sedimentation rates using the 210Pb dating method and identifying the heavy metal pollutants and their variability in time. Five sediment cores were taken with a gravity corer and - after drying the sliced samples-physical parameters, organic material and inorganic carbon content were determined. The total 210Pb content was measured via 210Po by alpha spectrometry, while supported 210Pb was measured by 226Ra (trough short life 222Rn daughters) with HPGe detectors. Heavy metals were determined by ICP-MS; from the 64 measured elements, only exceeding values of Al, As, Cd, Co, Cs, Cr, Cu, Fe, Hg, K, Li, Mg, Mn, Ni, Pb and Zn are discussed. After applying the CRS model, ages and sedimentation rates were calculated. The average sedimentation rate of the Cruhlig Lake is 0.21 ± 0.02 g/cm2y, Minimum values (0.05 ± 0.003 g/cm2y) are registered along the eastern shoreline of the lake before 1913, while maximum values are recorded due to the flooding in 2006 in the western side (1.34 ± 0.12 g/cm2y). Recent sedimentation rates divide the lake into three areas: the secluded eastern near shore part (0.63 ± 0.07 g/cm2y), the centre of the lake (0.92 ± 0.05 g/cm2y) and the dynamic western area, where most sediment transport takes place (1.13 ± 0.01 g/cm2y). The sedimentation pattern proves this lake to be very sensitive to fluvial discharge fluctuations. The building of the Iron Gate dams (1972 and 1985) had a negative impact on the sedimentation decreasing it with 58.74%, while after 1989 these values grew 2.25 times. The lake received a quantity of sediment rich in heavy metals in 1992 ± 3 y, which settled mostly on the eastern part. Values for Cd, Co, Cr, Hg, Pb and Zn are up to five times higher in 1980 ± 5 y in the eastern part of the lake, while Cd, Co, Cr and Ni are twice as high as the values measured for the marine substrate. Values of As show increasing of up to 150% in 2006 ± 2 y throughout the whole surface of the lake. © 2015 Elsevier Ltd.}, keywords = {NICKEL; CARBON; ZINC; MAGNESIUM; COPPER; pollution; lead; heavy metal; cadmium; Heavy metals; Manganese; SEDIMENTS; Lakes; Sedimentation; physical parameters; Lake pollution; Heavy metal pollution; SEDIMENT TRANSPORT; Danube Delta; Reconfigurable hardware; Sedimentation rates; Sedimentation pattern; Recent sedimentation; Heavy metal pollutants; 210Pb dating; Sedimentation dynamics; Iron Gates; 210Pb dating}, year = {2016}, eissn = {1879-1700}, pages = {167-175} } @article{MTMT:3095934, title = {Atmospheric flux, transport and mass balance of Pb-210 and Cs-137 radiotracers in different regions of Romania}, url = {https://m2.mtmt.hu/api/publication/3095934}, author = {Begy, RC and Kovács, Tibor and Veres, D and Simon, H}, doi = {10.1016/j.apradiso.2016.02.008}, journal-iso = {APPL RADIAT ISOTOPES}, journal = {APPLIED RADIATION AND ISOTOPES}, volume = {111}, unique-id = {3095934}, issn = {0969-8043}, abstract = {This study focuses on the determination of Pb-210 and Cs-137 fluxes from different areas in Transylvania, Romania and on the determination of transport and mass balance within the lacustrine system of Red Lake. In order to achieve this, samples were taken from six different locations (Bihor County area, Ighiel area, Red Lake area, Mluha Peatbog, Mohos Peatbog and Zanoaga Rosie Peat bog in the Semenic Mountains) throughout Romania, these being compared to the values of the Danube Delta area. The activity concentrations of the soil samples were measured by gamma spectrometry (HPGe detector) for both (210)Pbtoni, Pb-210(sup) (Ra-226) and Cs-137, while peat samples were measured by both alpha ((210)po) spectrometry (PIPS detectors) as well. The mean value for the Pb-210 flux was measured in the Danube Delta region (42 +/- 8 Bq m(-2) yr(-1)), while the highest was measured in the Semenic Peatbog (227 +/- 54 Bq m(-2) yr(-1)); the average being 132 +/- 8 Bq m(-2) yr(-1). In case of Cs-137 the mean was 298 +/- Bq m(-2) yr(-1), maximum being 1683 +/- 15 Bq m(-2) yr(-1) in case of Ighiel area and minimum being 32 +/- Bq m(-2) yr(-1) in the Danube Delta region. In case of the Red Lake, from the total inventory of 410 +/- 23 Bq m(-2) yr(-1) in the sediments, the loss by outflows is 100 +/- 12 Bq m(-2) yr(-1), the catchment to lake transfer factor being 0.84%. (C) 2016 Elsevier Ltd. All rights reserved.}, keywords = {MODELS; UK; DEPOSITION; Romania; REDISTRIBUTION; Sedimentation; catchment; Cumbria; Cultivated land; FALLOUT RADIONUCLIDES; SOIL-EROSION RATES; Pb-210 transport factor; Pb-210 and Cs-137 inventory; Pb-210 and Cs-137 flux; Transylvania}, year = {2016}, eissn = {1872-9800}, pages = {31-39}, orcid-numbers = {Kovács, Tibor/0000-0003-2606-0397} } @article{MTMT:2999014, title = {Recent sediment accumulation rates in contrasting lakes in the Carpathians (Romania): impacts of shifts in socio-economic regime}, url = {https://m2.mtmt.hu/api/publication/2999014}, author = {Hutchinson, SM and Akinyemi, FO and Mîndrescu, M and Begy, Róbert-Csaba and Feurdean, A}, doi = {10.1007/s10113-015-0764-7}, journal-iso = {REG ENVIRON CHANGE}, journal = {REGIONAL ENVIRONMENTAL CHANGE}, volume = {16}, unique-id = {2999014}, issn = {1436-3798}, abstract = {Longer-term environmental studies are increasingly used to better understand contemporary ecosystems conditions and for forecasting their future trajectories. Here, we use radiometric measurements and the characterisation of sediment properties from six mountain and a lowland lake in Central Eastern Europe with the aim to assess temporal and spatial variability in sediment accumulation rates (SARs) in relation to three socio-economic regimes: traditional (1840–1948), socialist (1948–1989) and post-socialist (post-1990). We also set out to determine reference conditions for these lakes i.e. conditions before significant human impact. Our results show a trend of increasing SARs from basal sediments (pre 1840) towards the present at only two sites. This contrasts with findings from Western and Central European lakes where SARs have predominantly increased from 1850 towards the top of cores. We highlight the differential impacts of the traditional, socialist and post-socialist periods on the SARs at these lakes. Lowland and mid-elevations lakes (n = 2) were most markedly impacted by the socialist period of land use regime; lakes from the southern Carpathians (n = 2) were more impacted in the traditional period (transhumance pastoral activities), whereas those from the north (n = 3) in the socialist and post-socialist periods (summer pastoralism). Results from our study show a continuous anthropogenic impact during the entire period considered, even in remote mountain areas. This suggests that a temporal frame of 100–150 years is too short to meaningfully register the reference conditions of these lakes. Furthermore, a predominantly natural state may not have existed for centuries in this region. © 2015 Springer-Verlag Berlin Heidelberg}, keywords = {Environmental Monitoring; land use change; environmental magnetism; Summer grazing; Socialist agricultural system; Sediment geochemistry; Palaeolimnology; CE Europe}, year = {2016}, eissn = {1436-378X}, pages = {501-513} } @article{MTMT:2965683, title = {Bolătău sediment record – chronology, microsedimentology and potential for a high resolution multimillennial paleoenvironmental proxy archive}, url = {https://m2.mtmt.hu/api/publication/2965683}, author = {Mindrescu, M and Németh, Alexandra and Grădinaru, I and Bihari, Árpád and Németh, Tibor and Fekete, József and Bozsó, Gábor and Kern, Zoltán}, doi = {10.1016/j.quageo.2015.10.007}, journal-iso = {QUAT GEOCHRONOL}, journal = {QUATERNARY GEOCHRONOLOGY}, volume = {32}, unique-id = {2965683}, issn = {1871-1014}, year = {2016}, eissn = {1878-0350}, pages = {11-20}, orcid-numbers = {Németh, Tibor/0000-0002-1836-6006; Kern, Zoltán/0000-0003-4900-2587} } @article{MTMT:2883685, title = {Effects of particle optical properties on grain size measurements of aeolian dust deposits}, url = {https://m2.mtmt.hu/api/publication/2883685}, author = {Varga, György and Újvári, Gábor and Kovács, János and Szalai, Zoltán}, journal-iso = {GEOPHYS RES ABSTR}, journal = {GEOPHYSICAL RESEARCH ABSTRACTS}, volume = {17}, unique-id = {2883685}, issn = {1029-7006}, year = {2015}, eissn = {1607-7962}, orcid-numbers = {Varga, György/0000-0003-4784-6372; Újvári, Gábor/0000-0002-2816-6155; Kovács, János/0000-0001-7742-5515; Szalai, Zoltán/0000-0001-5267-411X} } @article{MTMT:150749, title = {Examination of the effect of particle size on the radionuclide content of soils}, url = {https://m2.mtmt.hu/api/publication/150749}, author = {Bihari, Árpád and Dezső, Z}, doi = {10.1016/j.jenvrad.2007.12.020}, journal-iso = {J ENVIRON RADIOACTIV}, journal = {JOURNAL OF ENVIRONMENTAL RADIOACTIVITY}, volume = {99}, unique-id = {150749}, issn = {0265-931X}, year = {2008}, eissn = {1879-1700}, pages = {1083-1089} }