@article{MTMT:30741554, title = {Periodicities of paleoclimate variations in the first high-resolution non-orbitally tuned grain size record of the past 1 Ma from SW Hungary and regional, global correlations}, url = {https://m2.mtmt.hu/api/publication/30741554}, author = {Sümegi, Pál and Gulyás, Sándor and Molnár, Dávid and Sümegi, BP. and Törőcsik, Tünde and Almond, PC. and Smalley, I and Zhou, L and Galovic, L and Pál-Molnár, Elemér and Hao, Q and Molnár, Mihály and Koloszár, L}, doi = {10.1016/j.aeolia.2019.07.002}, journal-iso = {AEOLIAN RES}, journal = {AEOLIAN RESEARCH}, volume = {40}, unique-id = {30741554}, issn = {1875-9637}, year = {2019}, eissn = {2212-1684}, pages = {74-90}, orcid-numbers = {Sümegi, Pál/0000-0003-1755-4440; Gulyás, Sándor/0000-0002-3384-2381; Molnár, Dávid/0000-0001-5304-0741; Smalley, I/0000-0002-3332-2343; Zhou, L/0000-0003-4203-1529; Pál-Molnár, Elemér/0000-0002-9606-0133} } @article{MTMT:30399128, title = {Clumped isotope paleotemperatures from MIS 5 soil carbonates in southern Hungary}, url = {https://m2.mtmt.hu/api/publication/30399128}, author = {Újvári, Gábor and Kele, Sándor and Bernasconi, SM and Haszpra, László and Novothny, Ágnes and Bradák, Balázs}, doi = {10.1016/j.palaeo.2019.01.002}, journal-iso = {PALAEOGEOGR PALAEOCL}, journal = {PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY}, volume = {518}, unique-id = {30399128}, issn = {0031-0182}, year = {2019}, eissn = {1872-616X}, pages = {72-81}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Kele, Sándor/0000-0002-8607-7636; Haszpra, László/0000-0002-7747-6475; Novothny, Ágnes/0000-0003-3513-0406} } @article{MTMT:3280132, title = {Interpretation of sedimentary (sub)populations extracted from grain size distributions of Central European loess-paleosol series}, url = {https://m2.mtmt.hu/api/publication/3280132}, author = {Varga, György and Újvári, Gábor and Kovács, János}, doi = {10.1016/j.quaint.2017.09.021}, journal-iso = {QUATERN INT}, journal = {QUATERNARY INTERNATIONAL}, volume = {502}, unique-id = {3280132}, issn = {1040-6182}, abstract = {Grain size proxies of aeolian dust deposits have widely been applied in environmental and sedimentary studies. However, large body of research papers are not taking into consideration that a complex grain size distribution curve cannot be an indicator of a single one environmental factor (e.g. wind speed/strength, transportation distance, aridity). The aim of the present paper is to discuss the main differences of frequently used statistical methods and to provide possible interpretations of the results by applying these various approaches on the high-resolution loess-paleosol profile of Dunaszekcso, South Hungary (Central Europe). Beside single statistical descriptors (mean, median, mode) of grain size and simple indices of size-fraction ratios (U-ratio, Grain Size Index), some more complex algorithms were also used in our paper. The applied parametric curve-fitting, end-member modelling and hierarchical cluster analysis techniques are using the whole spectrum of the measured grain size distributions and provide a more reliable and more representative results even in case of small scale variations. According to our findings, approaches which provide direct linkage among simple statistical descriptors and single atmospheric or other environmental elements are rather oversimplified as properties aeolian dust deposits are influenced by the integrated effects of several concurrent processes. Differences of more complex decomposition methods arise from the different approach and scope. End-members are determined from the unmixing based on the covariance structure of the whole grain size data-series of the section, while the parametric curve-fitting is based on the one-by-one deconvolution of the grain size distribution curves. End-members of loess-paleosol samples are regarded as representation of the average dust grain size distribution of various temporal sediment clusters of seasonal or other short-term intervals, while (sub) populations by parametric curve-fitting are proposed to illustrate process-related elements of background and dust storm depositional components for each sample. Results of cluster analysis represent similar grouping conditions as end-member modelling with a reduced sedimentary and genetically meaning. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.}, year = {2019}, eissn = {1873-4553}, pages = {60-70}, orcid-numbers = {Varga, György/0000-0003-4784-6372; Újvári, Gábor/0000-0002-2816-6155; Kovács, János/0000-0001-7742-5515} } @article{MTMT:3297574, title = {A conceptual magnetic fabric development model for the Paks loess in Hungary}, url = {https://m2.mtmt.hu/api/publication/3297574}, author = {Bradák, Balázs and Újvári, Gábor and Seto, Y and Hyodo, M and Végh, Tamás}, doi = {10.1016/j.aeolia.2017.11.002}, journal-iso = {AEOLIAN RES}, journal = {AEOLIAN RESEARCH}, volume = {30}, unique-id = {3297574}, issn = {1875-9637}, year = {2018}, eissn = {2212-1684}, pages = {20-31}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Végh, Tamás/0000-0001-8476-3686} } @article{MTMT:30356403, title = {Loess distribution and related Quaternary sediments in the Carpathian Basin}, url = {https://m2.mtmt.hu/api/publication/30356403}, author = {Lehmkuhl, F and Boesken, J and Hosek, J and Sprafke, T and Markovic, SB and Obreht, I and Hambach, U and Sümegi, Pál and Thiemann, A and Steffens, S and Lindner, H and Veres, D and Zeeden, C}, doi = {10.1080/17445647.2018.1526720}, journal-iso = {J MAPS}, journal = {JOURNAL OF MAPS}, volume = {14}, unique-id = {30356403}, issn = {1744-5647}, abstract = {Supraregional (palaeo)geoecological studies require detailed knowledge of the distribution of aeolian sediments and their sources. Such spatial data can be visualised and shared in maps, but often these are constrained in their resolution or extent. This is the case for the Carpathian Basin, where cross-border maps are not detailed enough to answer many research questions. Problems occur especially along political borders due to different geological mapping standards and varying lithological definitions. Using a Geographic Information System (GIS), we compiled a map showing the distribution of loess and related Quaternary sediments in the Carpathian Basin, with unprecedented detail. We vectorised and analysed existing data (mainly from geological maps) and combined and transferred these into a common (loess) sediment classification system. This cross-border map shows the distribution of aeolian sediments in the Carpathian Basin at a scale of 1:1,500,000. For the northwestern and the southern Carpathian Basin, we added maps that clarify the extent of late Pleistocene and Holocene terrace and floodplain deposits, which were merged in the to highlight the predominant dust source areas for this region.}, keywords = {Europe; SEQUENCE; Hungary; geography; GIS; Pannonian Basin; Serbia; Glacial cycles; Spatial data; Loess map; aeolian sediments; dust sources; SOUTHERN LIMIT; SUTTO}, year = {2018}, eissn = {1744-5647}, pages = {661-670}, orcid-numbers = {Lehmkuhl, F/0000-0002-6876-7377; Sprafke, T/0000-0003-1198-4482; Sümegi, Pál/0000-0003-1755-4440; Thiemann, A/0000-0003-3428-3072} } @article{MTMT:3374753, title = {New chronology of the best developed loess/paleosol sequence of Hungary capturing the past 1.1 ma. Implications for correlation and proposed pan-Eurasian stratigraphic schemes}, url = {https://m2.mtmt.hu/api/publication/3374753}, author = {Sümegi, Pál and Gulyás, Sándor and Molnár, Dávid and Sümegi, B P and Almond, P C and Vandenberghe, J and Zhou, L and Pál-Molnár, Elemér and Törőcsik, Tünde and Hao, Q and Smalley, I and Molnár, Mihály and Marsi, István}, doi = {10.1016/j.quascirev.2018.04.012}, journal-iso = {QUATERN SCI REV}, journal = {QUATERNARY SCIENCE REVIEWS}, volume = {191}, unique-id = {3374753}, issn = {0277-3791}, year = {2018}, eissn = {1873-457X}, pages = {144-166}, orcid-numbers = {Sümegi, Pál/0000-0003-1755-4440; Gulyás, Sándor/0000-0002-3384-2381; Molnár, Dávid/0000-0001-5304-0741; Pál-Molnár, Elemér/0000-0002-9606-0133} } @article{MTMT:3296802, title = {Coupled European and Greenland last glacial dust activity driven by North Atlantic climate}, url = {https://m2.mtmt.hu/api/publication/3296802}, author = {Újvári, Gábor and Stevens, T and Molnár, Mihály and Demény, Attila and Fabrice, L and Varga, György and Jull, Timothy AJ and Páll-Gergely, Barna and Buylaert, JP and Kovács, János}, doi = {10.1073/pnas.1712651114}, journal-iso = {P NATL ACAD SCI USA}, journal = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, volume = {114}, unique-id = {3296802}, issn = {0027-8424}, year = {2017}, eissn = {1091-6490}, pages = {E10632-E10638}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Demény, Attila/0000-0003-0522-9018; Varga, György/0000-0003-4784-6372; Páll-Gergely, Barna/0000-0002-6167-7221; Kovács, János/0000-0001-7742-5515} } @article{MTMT:3080495, title = {Charcoal and mollusc shell 14C-dating of the Dunaszekcso loess record, Hungary}, url = {https://m2.mtmt.hu/api/publication/3080495}, author = {Újvári, Gábor and Molnár, Mihály and Páll-Gergely, Barna}, doi = {10.1016/j.quageo.2016.05.005}, journal-iso = {QUAT GEOCHRONOL}, journal = {QUATERNARY GEOCHRONOLOGY}, volume = {35}, unique-id = {3080495}, issn = {1871-1014}, abstract = {Accelerator mass spectrometry (AMS) radiocarbon dating of charcoals and 10 mollusc species (+2 identified at the family level) yield 64 new ages from the Dunaszekcso loess record, Hungary. Charcoal 14C ages are found to be protocol-dependent, with ages obtained from the high temperature (800 °C) fraction of the two-step combustion (TSC) protocol being always the oldest and likely most reliable. One step combustion (OSC) at 1000 °C produces comparable ages with those obtained from the low temperature (400 °C) fraction of the TSC protocol. Discrepancies between the ABA-TSC400 and TSC800 ages become larger for older, and less well-preserved charcoal fragments. Testing of shell ages against those of charcoals reveals that Succineidae sp., Chondrula tridens, Trochulus hispidus and members of the family Clausiliidae yield 14C ages that are statistically indistinguishable from charcoals recovered from the same stratigraphic interval, or with the ABA-TSC800 charcoal age. Thus, these species show great potential for creating accurate and precise chronologies for loess records within the useful range (<~40 ka) of 14C-dating of land snails. Conservative estimates of 95% uncertainties of the resulting Bayesian age-depth models are in the range of 500-800 yr. However, these uncertainties are strongly dependent on the number of dates available and the resolution of sampling, but they are usually well below those of luminescence chronologies. © 2016 Elsevier B.V.}, keywords = {Quaternary; radiocarbon dating; charcoal; LAND SNAIL; mollusc; loess}, year = {2016}, eissn = {1878-0350}, pages = {43-53}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Páll-Gergely, Barna/0000-0002-6167-7221} } @article{MTMT:3072437, title = {Saharan dust deposition in the Carpathian Basin and its possible effects on interglacial soil formation}, url = {https://m2.mtmt.hu/api/publication/3072437}, author = {Varga, György and Cserháti, Csaba and Kovács, János and Szalai, Zoltán}, doi = {10.1016/j.aeolia.2016.05.004}, journal-iso = {AEOLIAN RES}, journal = {AEOLIAN RESEARCH}, volume = {22}, unique-id = {3072437}, issn = {1875-9637}, keywords = {Carpathian Basin; Saharan dust; Dust flux; pleistocene interglacial}, year = {2016}, eissn = {2212-1684}, pages = {1-12}, orcid-numbers = {Varga, György/0000-0003-4784-6372; Kovács, János/0000-0001-7742-5515; Szalai, Zoltán/0000-0001-5267-411X} } @article{MTMT:2790432, title = {AMS 14C and OSL/IRSL dating of the Dunaszekcső loess sequence (Hungary): chronology for 20 to 150 ka and implications for establishing reliable age–depth models for the last 40 ka}, url = {https://m2.mtmt.hu/api/publication/2790432}, author = {Újvári, Gábor and Molnár, Mihály and Novothny, Ágnes and Páll-Gergely, Barna and Kovács, János and Várhegyi, András}, doi = {10.1016/j.quascirev.2014.06.009}, journal-iso = {QUATERN SCI REV}, journal = {QUATERNARY SCIENCE REVIEWS}, volume = {106}, unique-id = {2790432}, issn = {0277-3791}, abstract = {Abstract As revealed by 18 AMS radiocarbon and 24 OSL/IRSL ages the Dunaszekcső loess-paleosol sequence is an excellent terrestrial record of paleoenvironmental change in the Carpathian Basin for the last 130 ka, with significant soil forming episodes during the Eemian interglacial (130–115 ka, MIS 5e) and in some subsequent MIS 5 stages, and distinct periods of loess accumulations during the MIS 4 and MIS 2. Charcoals from the sequence made it possible to test the accuracy of 14C ages from mollusc shells. This approach revealed that 14C ages from some gastropods having small shells (<10 mm) (Succinella oblonga, Vitrea crystallina) are statistically indistinguishable from the ages of charcoals, while others (Clausiliidae sp., Chondrula tridens) show age anomalies up to 600–800 years. OSL and pIRIR@290 ages are found to be consistently older, while post-IR OSL ages are younger than the 14C ages from charcoals and molluscs by some thousands of years, except for pIRIR@225 ages that match the radiocarbon ages quite well. OSL and IRSL ages have scatters up to 7–10 thousand years within 40 ka, while charcoals and small molluscs yield consistent ages with relatively low variability. Beyond the observation that some small molluscs seem to yield reliable 14C ages, calibrated 2σ age ranges of the radiocarbon data (ca 500–800 years for 20 to 30 ka) are an order of magnitude narrower than those of the OSL/IRSL methods (1800–4000 years for 25 to 35 ka). Thus, for establishing chronologies within 40 ka, which are both accurate and precise enough to address issues like synchroneity of millennial-scale paleoenvironmental events across regions (e.g. North Atlantic and Europe), AMS radiocarbon dating of shells of specific loess molluscs and charcoals may probably be a powerful chronological tool. However, additional work is definitely required involving 14C and OSL/IRSL dates from other loess sequences to further test the performance of these two supposedly robust chronometers.}, keywords = {Hungary; radiocarbon dating; mollusc; paleosol; loess; OSL and IRSL dating}, year = {2014}, eissn = {1873-457X}, pages = {140-154}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Novothny, Ágnes/0000-0003-3513-0406; Páll-Gergely, Barna/0000-0002-6167-7221; Kovács, János/0000-0001-7742-5515} } @article{MTMT:2524367, title = {The Paks loess-paleosol sequence: A record of chemical weathering and provenance for the last 800 ka in the mid-Carpathian Basin}, url = {https://m2.mtmt.hu/api/publication/2524367}, author = {Újvári, Gábor and Raucsikné Varga, Andrea Beáta and Raucsik, Béla and Kovács, János}, doi = {10.1016/j.quaint.2012.04.004}, journal-iso = {QUATERN INT}, journal = {QUATERNARY INTERNATIONAL}, volume = {319}, unique-id = {2524367}, issn = {1040-6182}, abstract = {The Paks loess-paleosol sequence is one of the most important terrestrial records of Middle and Late Pleistocene environmental changes in East Central Europe, spanning the last ca. 0.8. Ma. While geochemical proxies demonstrate a general decreasing chemical weathering trend over the last 0.8. Ma in the Carpathian Basin, mineralogy and derived indices reflect intensifying physical erosion. In theory, the observed chemical weathering trend can be accounted for both by enhanced input of relatively unweathered material and by climate deterioration during the Quaternary, as the proxies such as CIA are not capable of distinguishing between pre- and post-depositional weathering. Enhanced physical erosion of the source areas, driven by tectonism, and resulting increased sedimentation of fresh mineral dust at the depositional site are demonstrated by increasing dolomite, illite and chlorite contents and sme/ill, sme/(ill. +. chl) ratios from older to younger sediments in the profile, together with increasing thickness of loess layers towards the youngest part of the sequence. At the same time, constant smectite contents (30-40%) in paleosols appear to disprove progressive aridization of interglacials through time and suggest that the duration of pedogenesis played an important role in determining soil types. Further, the increasing proportion of inherited phyllosilicates (illite and chlorite) would, in theory, raise the possibility that the decreasing values of chemical weathering indices are just artifacts of enhanced physical erosion and resulting increased dust deposition by a dilution effect. The above findings highlight the fact that the general view on chemical weathering is oversimplistic, as its 'equation' includes two basic variables, tectonism and time beyond climate and the interplay of these equally important factors will eventually determine its final value. To get a better grasp of these processes needs further data (more age control in loess profiles, data on uplift in and around sedimentary basins) and more sophisticated proxies, as the mineralogical data presented here can be considered only semiquantitative.Regarding the provenance of sediments in the Paks profile, geochemical data demonstrate that felsic rocks dominated the source areas and there have been only very little variations in provenance over the last ca. 0.8. Ma. Significant contributions from mafic/ultramafic rocks to the sediments can be ruled out as revealed by lower abundances of ferromagnesian trace elements. The appearance of amphiboles and high dolomite contents suggest that loess material was at least partly sourced from local rocks and geochemical data reveal a genetic link between floodplain sediments and loess deposits. © 2012 Elsevier Ltd and INQUA.}, year = {2014}, eissn = {1873-4553}, pages = {22-37}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Raucsikné Varga, Andrea Beáta/0000-0002-8673-1482; Raucsik, Béla/0000-0002-1951-5974; Kovács, János/0000-0001-7742-5515} } @article{MTMT:2759491, title = {Spatiotemporal patterns of Saharan dust outbreaks in the Mediterranean Basin}, url = {https://m2.mtmt.hu/api/publication/2759491}, author = {Varga, György and Újvári, Gábor and Kovács, János}, doi = {10.1016/j.aeolia.2014.06.005}, journal-iso = {AEOLIAN RES}, journal = {AEOLIAN RESEARCH}, volume = {15}, unique-id = {2759491}, issn = {1875-9637}, abstract = {Saharan dust outbreaks transport appreciable amounts of mineral particles into the atmosphere of the Mediterranean Basin. Atmospheric particulates have significant impacts on numerous atmospheric, climatic and biogeochemical processes. The recognition of background drivers, spatial and temporal variations of the amount of Saharan dust particles in the Mediterranean can lead to a better understanding of possible past and future environmental effects of atmospheric dust in the region. For this study the daily NASA Total Ozone Mapping Spectrometer's and Ozone Monitoring Instrument's aerosol data (1979-2012) were employed to estimate atmospheric dust amount. Daily geopotential height, wind vector and meridional flow data of the distinguished dust events were obtained from the NCEP/NCAR Reanalysis to compile mean synoptic composite maps. In order to identify the typical dust transportation routes and possible source areas, the backward trajectories were plotted using the NOAA HYSPLIT model. The main period of the dust transportation is from March to end of August, when the thermal convective activity forces the injection of particles to higher atmospheric levels. However, seasonality patterns of the different Mediterranean sub-basins show quite large differences. In western sub-basins, the maxima of Saharan dust outbreaks is in summer, related southwest flow between a southward emanating trough and the northward migrating subtropical high-pressure centre. In the eastern basin, dust storms occur typically in spring, generated by the warm sector winds on foreside of eastward moving Mediterranean and Sharav cyclones. The seasonal distribution of dust events in the central sub-basins shows a bimodal characteristic with a spring and summer peak. © 2014 Elsevier B.V. All rights reserved.}, keywords = {Mediterranean; MINERAL DUST; dust storm; Sahara; synoptic meteorology}, year = {2014}, eissn = {2212-1684}, pages = {151-160}, orcid-numbers = {Varga, György/0000-0003-4784-6372; Újvári, Gábor/0000-0002-2816-6155; Kovács, János/0000-0001-7742-5515} } @article{MTMT:2363430, title = {Towards identifying the origin of metamorphic components in Austrian loess: Insights from detrital rutile chemistry, thermometry and U-Pb geochronology}, url = {https://m2.mtmt.hu/api/publication/2363430}, author = {Újvári, Gábor and Klötzli, U and Kiraly, F and Ntaflos, T}, doi = {10.1016/j.quascirev.2013.06.002}, journal-iso = {QUATERN SCI REV}, journal = {QUATERNARY SCIENCE REVIEWS}, volume = {75}, unique-id = {2363430}, issn = {0277-3791}, abstract = {Trace element (Cr, Nb, Zr) geochemistry and U-Pb geochronology of detrital rutile grains provide constraints on the nature of potential metamorphic sources of loess in Austria. Cr and Nb compositions reveal rutile sources with a predominance of metapelitic lithologies for all three loess samples. By contrast, Zr-in-rutile geothermometry indicates that formation temperatures for loess rutiles around Krems (at the Bohemian Massif=BM) proved to be ca 100-125°C higher (Tmedian=717 and 737°C for two samples from Stratzing and Krems) than those at Wels (close to the Eastern Alps=EA; Tmedian=612°C), implying that rutiles in loess at Wels were derived from Alpine lower amphibolite-grade rocks, while those in loess around Krems from rocks formed under upper amphibolite to granulite-grade conditions. Metamorphic temperatures recorded in rutiles from loess at the BM closely match the 'two-reaction' thermobarometry estimates of the last high-T overprint (7-11kbar and 700-800°C) of rocks making up the Varied series and Gföhl units around Krems. This event dated at 340 to 350Ma is believed to be captured by the detrital rutile U-Pb data as well (e.g. 349±21 and 352±32 Ma). All these data demonstrate the significance of proximal BM sources (Varied series and Gföhl unit drained by the Danube) in loess formation around Krems. Fluvial transport is believed to have played a substantial role in entraining and accumulating rutiles for subsequent aeolian deflation for loess near Wels. While the ultimate sources of these grains are likely to be in the Eastern Alps, the recycling of these rutiles from the flysch zone of the EA cannot be ruled out.Despite the uncertainties of Cr-Nb-based source discriminations in some cases and the potential decoupling of Zr- and U-Pb systematics recognized in rutiles, this study demonstrates that rutiles may provide unique details on the nature and metamorphic history of their parent rocks, if used with caution and by knowing its limitations under certain conditions. It is anticipated that, beyond zircon, rutile geochemistry will become a powerful provenance tracer in loess studies too. This seems to be particularly important to gain a better understanding on the erosion and rutile fertility of different metamorphic terrains and their contributions to loess material, issues that have not been adequately addressed thus far. © 2013 Elsevier Ltd.}, keywords = {Quaternary; Zr-in-rutile thermometry; Rutile U-Pb ages; Loess provenance; Detrital rutile}, year = {2013}, eissn = {1873-457X}, pages = {132-142}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155} } @article{MTMT:2151085, title = {Analysis of Saharan dust intrusions into the Carpathian Basin (Central Europe) over the period of 1979-2011}, url = {https://m2.mtmt.hu/api/publication/2151085}, author = {Varga, György and Kovács, János and Újvári, Gábor}, doi = {10.1016/j.gloplacha.2012.11.007}, journal-iso = {GLOBAL PLANET CHANGE}, journal = {GLOBAL AND PLANETARY CHANGE}, volume = {100}, unique-id = {2151085}, issn = {0921-8181}, abstract = {Aeolian dust particles and dust storms play substantial role in climatic and other environmental processes of the Earth system. The largest and most important dust source areas are situated in the Sahara, from where several hundred thousand tons of mineral dust is emitted each year and transported towards the European continent. Here we show that 130 Saharan dust events (SDEs) reached the atmosphere of the Carpathian Basin from 1979 to 2011 by using the NASA's daily TOMS Aerosol Index data, satellite images and backward trajectory calculations of NOAA HYSPLIT model. Monthly trends of dust events demonstrate that the main period of dust transportation is in the spring, with a secondary maximum in the summer (in July and August). This seasonal distribution match well the seasonality of Saharan dust emissions. However synoptic meteorological conditions govern primarily the occurrence of long-range dust transport towards Central Europe. Based on their different meteorological backgrounds (geopotential field, wind vector and meridional flow), SDEs were classified into three main types. By using composite mean maps of synoptic situations and backward trajectories, the possible source areas have also been identified for the different types of events. Finally, we provide a short discussion on how the African mineral dust could contribute to the local aeolian sedimentation of the Carpathian Basin during the Plio-Pleistocene. © 2012 Elsevier B.V.}, keywords = {Carpathian Basin; meteorology; MINERAL DUST; dust storm; Sahara}, year = {2013}, eissn = {1872-6364}, pages = {333-342}, orcid-numbers = {Varga, György/0000-0003-4784-6372; Kovács, János/0000-0001-7742-5515; Újvári, Gábor/0000-0002-2816-6155} } @article{MTMT:2107311, title = {Reconstructing the paleoenvironment of East Central Europe in the Late Pleistocene using the oxygen and carbon isotopic signal of tooth in large mammal remains}, url = {https://m2.mtmt.hu/api/publication/2107311}, author = {Kovács, János and Moravcová, M and Újvári, Gábor and Pintér, AG}, doi = {10.1016/j.quaint.2012.04.009}, journal-iso = {QUATERN INT}, journal = {QUATERNARY INTERNATIONAL}, volume = {276-277}, unique-id = {2107311}, issn = {1040-6182}, year = {2012}, eissn = {1873-4553}, pages = {145-154}, orcid-numbers = {Kovács, János/0000-0001-7742-5515; Újvári, Gábor/0000-0002-2816-6155} } @article{MTMT:1934996, title = {Evaluating the use of clay mineralogy, Sr-Nd isotopes and zircon U-Pb ages in tracking dust provenance: An example from loess of the Carpathian Basin}, url = {https://m2.mtmt.hu/api/publication/1934996}, author = {Újvári, Gábor and Raucsikné Varga, Andrea Beáta and Ramos, F C and Kovács, János and Németh, Tibor and Stevens, T}, doi = {10.1016/j.chemgeo.2012.02.007}, journal-iso = {CHEM GEOL}, journal = {CHEMICAL GEOLOGY}, volume = {304-305}, unique-id = {1934996}, issn = {0009-2541}, year = {2012}, eissn = {1872-6836}, pages = {83-96}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Raucsikné Varga, Andrea Beáta/0000-0002-8673-1482; Kovács, János/0000-0001-7742-5515; Németh, Tibor/0000-0002-1836-6006} } @article{MTMT:1712195, title = {Wind erosion under cold climate: A Pleistocene periglacial mega-yardang system in Central Europe (Western Pannonian Basin, Hungary)}, url = {https://m2.mtmt.hu/api/publication/1712195}, author = {Sebe, Krisztina and Csillag, Gábor and Ruszkiczay-Rüdiger, Zsófia and Fodor, László and Thamóné Bozsó, Edit and Müller, P and Braucher, R}, doi = {10.1016/j.geomorph.2011.08.003}, journal-iso = {GEOMORPHOLOGY}, journal = {GEOMORPHOLOGY}, volume = {134}, unique-id = {1712195}, issn = {0169-555X}, keywords = {REGION; DISCRIMINATION; LUMINESCENCE; RECONSTRUCTION; climate; DISTRIBUTIONS; wind erosion; wind erosion; PLEISTOCENE; Pannonian Basin; Quaternary; DESERT; LANDSCAPE; MIDDLE; Periglacial; Yardang; loess; Vardang}, year = {2011}, eissn = {1872-695X}, pages = {470-482}, orcid-numbers = {Sebe, Krisztina/0000-0002-4647-2199} } @article{MTMT:1394245, title = {Tectonic versus climatic control on the evolution of a loess–paleosol sequence at Beremend, Hungary: An integrated approach based on paleoecological, clay mineralogical, and geochemical data}, url = {https://m2.mtmt.hu/api/publication/1394245}, author = {Raucsikné Varga, Andrea Beáta and Újvári, Gábor and Raucsik, Béla}, doi = {10.1016/j.quaint.2010.10.032}, journal-iso = {QUATERN INT}, journal = {QUATERNARY INTERNATIONAL}, volume = {240}, unique-id = {1394245}, issn = {1040-6182}, abstract = {The role of two major factors, climate and tectonism, in controlling loess-paleosol evolution has been evaluated in the present study based on a multi-proxy dataset comprising mollusc, bulk and clay mineralogical, and geochemical data. A recent trend has been to use chemical indices such as the chemical index of alteration (CIA) for paleoclimate reconstructions in loess-paleosol sequences spanning several hundreds of thousands of years, but without any tectonic interpretation. Possible effects of geodynamic factors on physical erosion, chemical weathering and consequently weathering proxies are discussed. Clearly, the relative rates of physical erosion and chemical weathering in a sedimentary environment could be significantly influenced by geodynamic factors and governed not just by climate. Intensifying tectonic uplift gives rise to enhanced physical erosion, leading to increased supply of fresh mineral surfaces having less time to react with weathering agents. In theory, this process may point towards decreasing chemical weathering in a sequence without any real changes of climate. In the studied loess-paleosol sequence at Beremend (Hungary) a trend of decreasing chemical weathering has been observed, which can be explained by a global climate deterioration and accelerating uplift in and around the sedimentary basin. Increasing dust sedimentation could theoretically also contribute to this process as a result of increasing aridification and wind strength reflecting climate change in weathering records following a non-linear amplification. The findings refer to the fact that the impact of tectonism should also be taken into consideration in tracing past chemical weathering trends on timescales of hundreds of thousands (or millions) of years. This is because tectonic effects may impose on the CIA signal and distort it suggesting a potential bias in reconstructing paleoclimate change based only on this proxy from certain loess sequences associated with young orogenic belts. (C) 2010 Elsevier Ltd and INQUA. All rights reserved.}, year = {2011}, eissn = {1873-4553}, pages = {71-86}, orcid-numbers = {Raucsikné Varga, Andrea Beáta/0000-0002-8673-1482; Újvári, Gábor/0000-0002-2816-6155; Raucsik, Béla/0000-0002-1951-5974} } @article{MTMT:1456573, title = {Similarities among the Plio–Pleistocene terrestrial aeolian dust deposits in the World and in Hungary}, url = {https://m2.mtmt.hu/api/publication/1456573}, author = {Varga, György}, doi = {10.1016/j.quaint.2010.09.011}, journal-iso = {QUATERN INT}, journal = {QUATERNARY INTERNATIONAL}, volume = {234}, unique-id = {1456573}, issn = {1040-6182}, year = {2011}, eissn = {1873-4553}, pages = {98-108}, orcid-numbers = {Varga, György/0000-0003-4784-6372} } @article{MTMT:1361069, title = {Dust flux estimates for the Last Glacial Period in East Central Europe based on terrestrial records of loess deposits: a review}, url = {https://m2.mtmt.hu/api/publication/1361069}, author = {Újvári, Gábor and Kovács, János and Varga, György and Raucsik, Béla and Markovic, SB}, doi = {10.1016/j.quascirev.2010.07.005}, journal-iso = {QUATERN SCI REV}, journal = {QUATERNARY SCIENCE REVIEWS}, volume = {29}, unique-id = {1361069}, issn = {0277-3791}, year = {2010}, eissn = {1873-457X}, pages = {3157-3166}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Kovács, János/0000-0001-7742-5515; Varga, György/0000-0003-4784-6372; Raucsik, Béla/0000-0002-1951-5974} } @article{MTMT:1130631, title = {Origin, weathering, and geochemical composition of loess in southwestern Hungary}, url = {https://m2.mtmt.hu/api/publication/1130631}, author = {Újvári, Gábor and Raucsikné Varga, Andrea Beáta and Balogh-Brunstad, Zs}, doi = {10.1016/j.yqres.2008.02.001}, journal-iso = {QUATERNARY RES}, journal = {QUATERNARY RESEARCH}, volume = {69}, unique-id = {1130631}, issn = {0033-5894}, year = {2008}, eissn = {1096-0287}, pages = {421-437}, orcid-numbers = {Újvári, Gábor/0000-0002-2816-6155; Raucsikné Varga, Andrea Beáta/0000-0002-8673-1482} } @article{MTMT:1183257, title = {Results of radiocarbon analysis of Upper Weichselian loess sequences from Hungary}, url = {https://m2.mtmt.hu/api/publication/1183257}, author = {Sümegi, Pál and Molnár, Mihály and Sudár Sándorné Svingor, Éva and Szántó, Andrea Zsuzsanna and Hum, L and Gulyás, Sándor}, doi = {10.1017/S0033822200042880}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {49}, unique-id = {1183257}, issn = {0033-8222}, year = {2007}, eissn = {1945-5755}, pages = {1023-1030}, orcid-numbers = {Sümegi, Pál/0000-0003-1755-4440; Gulyás, Sándor/0000-0002-3384-2381} }