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Proxy paleoclimatology


Paleoclimatology plays a key role when aiming at a more thorough understanding of the recently accelerated climate change. Current climate change can also be examined in the context of thousands of years by studying climate proxies. A climate proxy is an environmental parameter which is strongly related to climate variability (e.g. annual tree growth, duration of ice cover of a lake or river, chemical composition of the carbonate laid in the increment of a shell, etc.) and suitable for describing climate changes slowly evolving in time. These proxies allow a better understanding of the climatic fluctuations of the pre-instrumental era. Furthermore, climate models driven by proxy data offer new perspectives on the climate conditions of such remote land/ocean areas without available instrumental or proxy data.

Selected publications

Topál, D., Q. Ding, J. Mitchell, I. Baxter, M. Herein, T. Haszpra, R. Luo, and Q. Li, (2020) An Internal Atmospheric Process Determining Summertime Arctic Sea Ice Melting in the Next Three Decades: Lessons Learned from Five Large Ensembles and Multiple CMIP5 Climate Simulations. J. Climate, 33, 7431–7454, doi:10.1175/JCLI-D-19-0803.1.

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Haszpra, T., D. Topál, and M. Herein (2020) On the Time Evolution of the Arctic Oscillation and Related Wintertime Phenomena under Different Forcing Scenarios in an Ensemble Approach. J. Climate, 33, 3107–3124, doi: 10.1175/JCLI-D-19-0004.1.

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Topál, D., Hatvani, I.G., Kern, Z. (2020) Refining projected multidecadal hydroclimate uncertainty in East-Central Europe using CMIP5 and single-model large ensemble simulations. Theor Appl Climatol 142, 1147–1167 doi:10.1007/s00704-020-03361-7.

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Pinke, Z, Kern Z., Pow, S. (2019) Volcanic mega-eruptions may trigger massive cholera outbreaks. Climate Research 79: 151–162. doi:10.3354/cr01587.

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Kern, Z ; Demény, A ; Persoiu, A ; Hatvani, IG (2019) Speleothem Records from the Eastern Part of Europe and Turkey—Discussion on Stable Oxygen and Carbon Isotopes QUATERNARY 2 : 3 Paper: 31 doi: 10.3390/quat2030031.

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Hatvani, IG ; Kern, Z ; Leel-Ossy, S ; Demeny, A (2018) Speleothem stable isotope records for east-central Europe: resampling sedimentary proxy records to obtain evenly spaced time series with spectral guidance EARTH SYSTEM SCIENCE DATA 10 : 1 pp. 139-149. doi: 10.5194/essd-10-139-2018.

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Árvai M., Morgós, A., Kern Z. (2018) Growth-climate relations and enhancing drought signals in pedunculate oak (Quercus robur L.) tree-ring chronology in Eastern Hungary. iForest- Biogeosciences 11: 267-274, doi: 10.3832/ifor2348-011.

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Hatvani, IG; Leuenberger, M ; Kohán, B ; Kern, Z (2017) Geostatistical analysis and isoscape of ice core derived water stable isotope records in an Antarctic macro region. POLAR SCIENCE 13 pp. 23-32. doi: 10.1016/j.polar.2017.04.001.

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Kern Z., Németh A., Horoszné Gulyás M., Popa, I., Levanic, T., Hatvani I.G. (2016) Natural proxy records of annual temperature- and hydroclimate variability from the Carpathian-Balkan Region for the past millennium: review & recalibration. Quaternary International 415: 109-125, doi: 10.1016/j.quaint.2016.01.012

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Takács K., Kern Z. (2015) Multidecadal changes in the river ice regime of Drava River lower course since AD 1875. Journal of Hydrology 529: 1890-1900. doi:10.1016/j.jhydrol.2015.01.040

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Kern Z., Patkó, M., Kázmér, M., Fekete, J., Kele, S., Pályi, Z. (2013) Multiple tree-ring proxies (earlywood width, latewood width and δ13C) from pedunculate oak (Quercus robur L.), Hungary. Quaternary International. 239: 257-267. doi: 10.1016/j.quaint.2012.05.037

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Cosmogenic isotopes


Terrestrial in situ produced cosmogenic nuclides have grown to be an essential geochronological tool for quantitative Quaternary geology and geomorphology.

Terrestrial in situ produced Cosmogenic Nuclides (TCN) are suitable for the determination of the exposure age and denudation rate of rock surfaces and landforms. The method is applicable in the time range of 102 to 106years and at variable lithologies. This time range covers the entire Quaternary and Pliocene, hence it has occupied a significant role among the tools of Quaternary geochronology.

We apply two in-situ produced cosmogenic radionuclides, the 10Be (t1/2 : 1,387 Ma) and 26Al (t1/2: 705 ka) for the age determination of fluvial, eolian and glacial landforms at selected study areas in the Pannonian Basin and in the surrounding Carpathians and in the Balkan Peninsula. Age determination of landforms connected to structural deformation (and/or climatic processes) enables the quantification of surface denudation and of vertical deformation rates. Besides, dating climatically controlled landforms allows the paleoclimate reconstruction of the study area.

The main focus of the research is the terrace chronology of the Danube valley and geochronology of glacial landforms and cave sediments in Macedonia and implications for Quaternary landscape evolution in the Central Balkan Peninsula. This research is supported by the NKFIH project FK-124807.

In-situ produced cosmogenic 10Be and 26Al sample preparation laboratory

Selected publications

Ruszkiczay-Rüdiger, Zs., Balázs, A., Csillag, G., Drijkoningen, G., & Fodor, L. 2020. Uplift of the Transdanubian Range, Pannonian Basin: How fast and why? Global and Planetary Change, doi:103263. 1-17.

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Ruszkiczay-Rüdiger, Zs., Kern Z, Temovski M, Madarász B, Milevski I, Braucher R, ASTER Team (2020) Last deglaciation in the central Balkan Peninsula: Geochronological evidence from Jablanica Mt (North Macedonia). Geomorphology 351: 106985, doi: 10.1016/j.geomorph.2019.106985

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Ruszkiczay-Rüdiger, Zs., Csillag, G., Fodor, L., Braucher, R., Novothny, Á., Thamó-Bozsó, E., Virág, A., Pazonyi, P., Timár, G., ASTER Team 2018. Integration of new and revised chronological data to constrain the terrace evolution of the Danube River (Gerecse Hills, Pannonian Basin). Quaternary Geochronology 48, 148-170. doi: 10.1016/j.quageo.2018.08.003

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Ruszkiczay-Rüdiger, Zs., Braucher, R., Novothny, Á., Csillag, G., Fodor, L., Molnár, G., Madarász, B., ASTER Team. 2016. Tectonic and climatic forcing on terrace formation: coupling in situ produced 10Be depth profiles and luminescence approach, Danube River, Hungary, Central Europe. Quaternary Science Reviews 131, 127-147.

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Ruszkiczay-Rüdiger, Zs., Kern, Z., Urdea, P., Braucher, R., Madarász, B., Schimmelpfennig, I., ASTER Team 2016. Revised deglaciation history of the Pietrele- Stânişoara glacial complex, Retezat Mts, Southern Carpathians, Romania. Quaternary International, 415, 216-229. doi:10.1016/j.quaint.2015.10.085

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Ruszkiczay-Rüdiger, Zs., Braucher, R., Csillag, G., Fodor, L., Dunai, T.J., Bada, G., Bourlés, D., Müller, P. 2011 Dating pleistocene aeolian landforms in Hungary, Central Europe, using in situ produced cosmogenic 10Be. Quaternary Geochronology, 6, pp. 515-529.

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Ruszkiczay-Rüdiger, Zs., 2004 Kitettségi kor és eróziós ráta meghatározásának módszere helyben keletkező kozmogén izotópokkal. FÖLDTANI KÖZLÖNY 134:(2) pp. 257-279.

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Water geochemistry


Water geochemistry deals with the certain elements of the water cycle, in it with the interaction of water and its environment (including the human environment) and water flow dynamics. It handles environmental isotopes, and physical/chemical variables describing water quality with the aid of modern data analysis methods.

One of these elements is the stable isotopic composition of precipitation, its spatiotemporal characteristics and their determination. Another element is shallow groundwater, which is highly important for drinking water supply.

Besides the previous the spatiotemporal recalibration of water quality monitoring systems and solving other water quality related environmental issues based on water quality variables is also an important task for this field.

In the framework of a Slovenian-Hungarian international collaboration (SNN118205) the research groups explored the isotopic composition of precipitation across the Adriatic-Pannonian Region.

Selected publications

Kern, Z ; Erdélyi, D ; Vreča, P ; Krajcar Bronić, I ; Fórizs, I ; Kanduč, T ; Štrok, M ; Palcsu, L ; Süveges, M ; Czuppon, Gy., Kohán, B., Hatvani I.G. (2020) Isoscape of amount-weighted annual mean precipitation tritium (3H) activity from 1976 to 2017 for the Adriatic–Pannonian region – AP3H_v1 database EARTH SYSTEM SCIENCE DATA 12 : 3 pp. 2061-2073. doi: 10.5194/essd-12-2061-2020

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Kern, Z ; Hatvani, IG; Czuppon, Gy; Fórizs, I; Erdélyi, D; Kanduč, T; Palcsu, L; Vreča, P (2020) Isotopic 'altitude' and 'continental' effects in modern precipitation across the Adriatic-Pannonian region. WATER 12 : 6 Paper: 1797 doi: 10.3390/w12061797

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Hatvani, IG; Erdélyi, D; Vreča, P; Kern, Z (2020) Analysis of the Spatial Distribution of Stable Oxygen and Hydrogen Isotopes in Precipitation Across the Iberian Peninsula. WATER 12 : 2 Paper: 481 doi: 10.3390/w12020481

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Hatvani, IG ; de Barros, VD ; Tanos, P ; Kovács, J ; Székely Kovács, I ; Clement, A (2020) Spatiotemporal changes and drivers of trophic status over three decades in the largest shallow lake in Central Europe, Lake Balaton. ECOLOGICAL ENGINEERING 151 Paper: 105861 doi: 10.1016/j.ecoleng.2020.105861

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Hatvani, IG ; Tanos, P ; Várbíró, G ; Arató, M ; Molnár, S ; Garamhegyi, T ; Kovács, J (2019) Distribution of niche spaces over different homogeneous river sections at seasonal resolution. ECOLOGICAL INDICATORS 98 pp. 804-811. doi: 10.1016/j.ecolind.2018.11.059

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Hatvani, IG; Kirschner, AKT ; Farnleitner, AH ; Tanos, P ; Herzig, A (2018) Hotspots and main drivers of fecal pollution in Neusiedler See, a large shallow lake in Central Europe. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 25 : 29 pp. 28884-28898. , doi: 10.1007/s11356-018-2783-7

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Hatvani, IG; Clement, A ; Korponai, J⁠ ; Kern, Z ; Kovács, J (2017) Periodic signals of climatic variables and water quality in a river – eutrophic pond – wetland cascade ecosystem tracked by wavelet coherence analysis. ECOLOGICAL INDICATORS 83 pp. 21-31. doi: 10.1016/j.ecolind.2017.07.018

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Kern, Z. , Harmon, R.S., Fórizs, I. (2016) Stable isotope signatures of seasonal precipitation on the Pacific coast of central Panama. Isotopes in Environmental and Health Studies 52: 128-140. doi: 10.1080/10256016.2015.1016021

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Chapman DV, Bradley C, Gettel GM, Hatvani IG, Hein T, Kovács J, Liska I, Oliver DM, Tanos P, Trásy B, Várbíró G. (2016) Developments in water quality monitoring and management in large river catchments using the Danube River as an example. ENVIRONMENTAL SCIENCE & POLICY 64: pp. 141-154

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Hatvani IG , Kovács J , Márkus L , Clement A , Hoffmann R , Korponai J (2015) Assessing the relationship of background factors governing the water quality of an agricultural watershed with changes in catchment property (W-Hungary). JOURNAL OF HYDROLOGY 521: pp. 460-469.

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