TY - CHAP AU - Petróczy, Máté Dániel AU - Van Leeuwen, Boudewijn AU - Tobak, Zalán AU - Molnár, Dávid AU - Szatmári, József ED - Blanka, Viktória TI - Dynamic geomorphometric study of the erosion of the Zagyvarona spoil tip using digital photogrammetry T2 - Natural Hazards and Climate Change - conference and workshop for identifying and tackling challenges together PB - Szegedi Tudományegyetem, Geoinformatikai, Természet- és Környezetföldrajzi Tanszék CY - Szeged SN - 9789633069301 PY - 2023 SP - 40 EP - 40 PG - 1 UR - https://m2.mtmt.hu/api/publication/34187490 ID - 34187490 LA - English DB - MTMT ER - TY - JOUR AU - Eltijani, Abdelrhim AU - Molnár, Dávid AU - Geiger, János TI - Paleoenvironmental multiproxy dataset of the Quaternary abandoned channel in Tövises bed, Great Hungarian Plain JF - DATA IN BRIEF J2 - DATA BRIEF VL - 49 PY - 2023 PG - 6 SN - 2352-3409 DO - 10.1016/j.dib.2023.109344 UR - https://m2.mtmt.hu/api/publication/34090149 ID - 34090149 LA - English DB - MTMT ER - TY - JOUR AU - Makó, László AU - Cseh, P AU - Nagy, Balázs AU - Sümegi, Pál AU - Molnár, Dávid TI - Development History of the Loess–Paleosol Profiles of Pécel, Kisdorog and Bonyhádvarasd, Hungary JF - QUATERNARY J2 - Quaternary VL - 6 PY - 2023 IS - 3 PG - 21 SN - 2571-550X DO - 10.3390/quat6030038 UR - https://m2.mtmt.hu/api/publication/34047615 ID - 34047615 AB - This study covers the examination of four loess–paleosol profiles in Hungary through grain size composition, organic matter, carbonate content and magnetic susceptibility measurements. One of the profiles (with a thickness of 25.72 m) can be found in the Gödöllő hills, on the border of town Pécel, and the other three profiles (Kisdorog-West—5.60 m, Kisdorog-East—6.40 and Bonyhádvarasd—8.16 m) are located in the Tolna hills of the Transdanubia region. The sections were continuously sampled with an interval of 4 cm. The same interval was also applied to the other three profiles. During the field exploration of the Pécel profile, we were able to study the complete loess wall, which was deposited on the sediment of the nearby Rákos stream. Based on the Ostracod fauna of the clay sediment beneath, the fluvial deposit can be considered as originating from the Upper Miocene. In the case of the Transdanubian sections, a significant change can be observed in the prevailing wind direction based on the grain size analyses. In addition, the results of magnetic susceptibility measurements suggest that the development of the Pécel profile took place during MIS 9–10, while the age of the three Transdanubian sections can be assumed to be the MIS 2–4. LA - English DB - MTMT ER - TY - JOUR AU - Eltijani, Abdelrhim AU - Molnár, Dávid AU - Geiger, János TI - Characterizing sedimentary processes in abandoned channel using compositional data analysis and wavelet transform JF - GEM - INTERNATIONAL JOURNAL ON GEOMATHEMATICS J2 - GEM - INT J GEOMATHEMATICS VL - 14 PY - 2023 IS - 1 PG - 16 SN - 1869-2672 DO - 10.1007/s13137-023-00223-y UR - https://m2.mtmt.hu/api/publication/33992807 ID - 33992807 N1 - Cited By :1 Export Date: 16 November 2023 Correspondence Address: Eltijani, A.; Department of Geology and Paleontology, Hungary; email: abdelrhimee@gmail.com AB - Grain size distribution (GSD) is essential for characterizing the deposition process. However, it is necessary to consider its compositional constraint to comprehend the statistical distribution of size fractions within the sediments. Compositional data analysis (CoDA) and wavelet transform (WT) represent alternative methods beyond traditional approaches, e.g., probability density function (PDF). This paper introduces a quantitative approach for characterizing Quaternary depositional and environmental changes using abandoned channel infill sediments. The proposed approach integrates CoDA and WT to thoroughly comprehend the depositional patterns observed in abandoned channels and the underlying environmental variability. The depositional model constructed based on CoDA showed coarsening-upward sequences, suggesting a periodic connection between the main channel and the oxbow lake. Three scales of cycles consistent with the depositional model constructed using CoDA were identified based on WT: small, medium, and large-scale cycles of processes. The large-scale cycles indicate the main depositional events, while the medium and small scale reflects the variation within and during deposition. CoDA and WT demonstrate excellent potential in characterizing the GSD and interpreting oxbow lakes' deposition and sedimentation processes. LA - English DB - MTMT ER - TY - CHAP AU - Sümegi, Pál AU - Hágen, András AU - Molnár, Dávid AU - Gulyás, Sándor AU - Vári, Tamás Zsolt TI - A témával kapcsolatos kutatási előzmények T2 - A sárgaföld emlékezete PB - GeoLitera CY - Szeged SN - 9789633068502 PY - 2022 SP - 15 EP - 43 PG - 29 UR - https://m2.mtmt.hu/api/publication/33635194 ID - 33635194 LA - Hungarian DB - MTMT ER - TY - CONF AU - Sümegi, Pál AU - Gulyás, Sándor AU - Molnár, Dávid AU - Almond, P AU - Smalley, I AU - Zhou, L. TI - Multimillenial paleoenvironmental, temperature variations and aeolian dynamics of the past 1 My inferred from a multiproxy study of the thickest, best resolved independently dated loess/paleosol record from SW Hungary T2 - The 2022 INQUA LoessFest PY - 2022 SP - 77 EP - 78 PG - 2 UR - https://m2.mtmt.hu/api/publication/33575048 ID - 33575048 LA - English DB - MTMT ER - TY - BOOK AU - Sümegi, Pál AU - Molnár, Dávid TI - Negyedidőszaki paleoökológia PB - Szegedi Tudományegyetem CY - Szeged PY - 2022 SP - 330 UR - https://m2.mtmt.hu/api/publication/33561344 ID - 33561344 LA - Hungarian DB - MTMT ER - TY - BOOK AU - Sümegi, Pál AU - Molnár, Dávid AU - Gulyás, Sándor AU - Törőcsik, Tünde TI - A sárgaföld emlékezete. A Kárpát-medence löszös szintjeinek kialakulása és fejlődéstörténete TS - A Kárpát-medence löszös szintjeinek kialakulása és fejlődéstörténete PB - GeoLitera CY - Szeged PY - 2022 SP - 439 SN - 9789633068502 UR - https://m2.mtmt.hu/api/publication/33561323 ID - 33561323 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Eltijani, Abdelrhim AU - Molnár, Dávid AU - Makó, László AU - Geiger, János AU - Sümegi, Pál TI - Applying grain-size and compositional data analysis for interpretation of the Quaternary oxbow lake sedimentation processes: Eastern Great Hungarian Plain JF - STUDIA QUATERNARIA J2 - STUD QUATER VL - 39 PY - 2022 IS - 2 SP - 83 EP - 93 PG - 11 SN - 1641-5558 DO - 10.24425/sq.2022.140885 UR - https://m2.mtmt.hu/api/publication/33547865 ID - 33547865 AB - Grain size distribution is one of the paleoenvironmental proxies that provide insight statistical distribution of size fractions within the sediments. Multivariate statistics have been used to investigate the depositional process from the grain size dis-tribution. Still, the direct application of the standard multivariate methods is not straightforward and can yield misleading interpretations due to the compositional nature of the raw grain size data. This paper is a methodological framework for grain size data characterization through the centered log ratio transformation and euclidean data, coupled with principal component analysis, cluster analysis, and linear discriminant analysis to examine Quaternary sediments from Tovises bed in the southeast Great Hungarian Plain. These approaches provide statistically significant and sedimentologically interpretable results for both datasets. However, the details by which they supplemented the conceptual model were sig-nificantly different, and this discrepancy resulted in a different temporal model of the depositional history. LA - English DB - MTMT ER - TY - JOUR AU - Sümegi, Pál AU - Molnár, Dávid AU - Gulyás, Sándor AU - Stevens, T AU - Makó, László AU - Cseh, P AU - Molnár, Mihály AU - Fitzsimmons, K AU - Nett, JJ. AU - Hlavatskyi, D AU - Lehmkuhl, F TI - Comparison of High-Resolution 14C and Luminescence-Based Chronologies of the MIS 2 Madaras Loess/Paleosol Sequence, Hungary: Implications for Chronological Studies JF - QUATERNARY J2 - Quaternary VL - 5 PY - 2022 IS - 4 SN - 2571-550X DO - 10.3390/quat5040047 UR - https://m2.mtmt.hu/api/publication/33240955 ID - 33240955 N1 - Department of Geology and Paleontology, University of Szeged, Szeged, H-6722, Hungary Interdisciplinary Excellence Centre, Institute of Geography and Earth Sciences, Long Environmental Changes Research Team, University of Szeged, Szeged, H-6722, Hungary Department of Earth Sciences, University of Uppsala, Uppsala, 75236, Sweden Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Eötvös Lóránd Research Network, Bem square 18/c, Debrecen, H-4026, Hungary Department of Geosciences, University of Tübingen, Tübingen, 72076, Germany Physical Geography and Geoecology, Department of Geography, RWTH Aachen University, Aachen, 52062, Germany Institute of Geophysics, National Academy of Sciences of Ukraine, Kyiv, 01030, Ukraine Export Date: 4 January 2023 Correspondence Address: Sümegi, P.; Department of Geology and Paleontology, Hungary; email: sumegi@geo.u-szeged.hu AB - Numerous loess/paleosol sequences (LPS) in the Carpathian Basin span the period of Marine Isotope Stage (MIS) 2 and the last glacial maximum (LGM). Nevertheless, only two known records—Madaras and Dunaszekcső—preserve highly resolved records with absolute chronologies with minimal uncertainties, which enable the meaningful assessment of feedbacks and short-term climatic fluctuations over this period. The Madaras profile is located at the northern margin fringe of the Bácska loess plateau; Dunaszekcső, located on the Danube to its west, yields a chronology built on over 100 14C dates yet spans only part of MIS 2, missing half of the LGM including its peak. Here, we add to the previously published 14C chronology for Madaras (15 dates) with an additional 17 14C and luminescence ages. Resulting age models built solely on quartz OSL and feldspar pIRIRSL data underestimate the 14C based chronology, which is likely based on inaccuracies related to luminescence signal behavior; we observe age underestimations associated with unusual quartz behavior and significant signal loss, a phenomenon also observed in Serbian and Romanian loess, which may relate to non-sensitized grains from proximal sources. Our new chronology provides higher resolution than hitherto possible, yielding consistent 2 sigma uncertainties of ~150–200 years throughout the entire sequence. Our study indicates that the addition of further dates may not increase the chronological precision significantly. Additionally, the new age model is suitable for tackling centennial-scale changes. The mean sedimentation rate based on our new age-depth model (10.78 ± 2.34 years/cm) is the highest yet recorded in the Carpathian Basin for MIS 2. The resolution of our age model is higher than that for the Greenland NGRIP ice core record. The referred horizons in our profile are all characterized by a drop in accumulation and a higher sand input, the latter most likely deriving from nearby re-exposed sand dunes. LA - English DB - MTMT ER -