Ryszard Kaczka

@cuni.cz

Department of Physical Geography and Geoecology
Charles University

RESEARCH, TEACHING, or OTHER INTERESTS

General Earth and Planetary Sciences
57

Scopus Publications

Scopus Publications

  • Longer growing seasons will not offset growth loss in drought-prone temperate forests of Central-Southeast Europe
    Jan Tumajer, Jakub Kašpar, Jan Altman, Nela Altmanová, J. Julio Camarero, Emil Cienciala, Vojtěch Čada, Tomáš Čihák, Jiří Doležal, Pavel Fibich, Pavel Janda, Ryszard Kaczka, Tomáš Kolář, Jiří Lehejček, Jiří Mašek, Radim Matula, Kateřina Neudertová Hellebrandová, Lenka Plavcová, Michal Rybníček, Miloš Rydval, Rohan Shetti, Miroslav Svoboda, Martin Šenfeldr, Pavel Šamonil, Ivana Vašíčková, Monika Vejpustková, Václav Treml
    Nature Communications, 2025
    The radial growth of temperate forests responds to climate change with remarkable variation across space and between species. However, there is limited understanding of how growing season extension and increasing drought stress contribute to long-term growth trends. Here, we calibrate the VS-Lite growth model using 2013 tree-ring chronologies from ten broadleaved and five coniferous genera in Central-Southeast Europe to predict intra-annual wood formation under four SSP climate scenarios through the 21 st century. Results show that forecasted summer drought stress will be temporarily offset by an extended growing season, leading to stable or positive trends in tree-ring widths until a tipping point in the 2040s–2050s. During the second half of the 21 st century, high-emission scenarios lead to growth acceleration in humid coniferous forests due to growing season extension and enhanced growth rate. In contrast, forecasted extension of the growing season is insufficient to compensate for declining summer growth rates at drier sites, resulting in significant growth reduction for all genera, particularly during dry years. Our results demonstrate that adjusting intra-annual wood formation to seasonal moisture availability may become crucial for tree survival in warmer climates. Furthermore, we highlight that only low-emission scenarios support non-declining stem growth in dry forests with current species composition.
  • Spatiotemporal Variability of Dendroecological Indicators in Pedunculate Oak (Quercus robur L.) Tree-Rings Across Europe in Relation to Species Distribution Models
    Andrei Popa, Jernej Jevšenak, Marcin Dyderski, Radosław Puchałka, Allan Buras, Ionel Popa, Martin Wilmking, Aleksandra Kalisty, Catalin‐Constantin Roibu, Marcin Jakubowski, Eric Thurm, Martin Šenfeldr, Marko Smiljanić, Ernst van der Maaten, Jan Esper, Edurne Martinez del Castillo, Vaclav Treml, Jan Tumajer, Tzvetan Zlatanov, Roberts Matisons, Gheorghe Florenta, Veronica Florenta, Maksym Netsvetov, Vladislav Grati, Andreas Burger, Karolina Janecka, Saša Kostić, Kamil Pilch, Diāna Jansone, Agnese Liepiņa, Yulia Prokopuk, Oleksandr Sylenko, Mátyás Árvai, Achim Bräuning, Cristina Marques, Martin Häusser, Emil Horváth, Jakub Jeleń, Ryszard Kaczka, Zoltán Kern, Tomáš Kolář, Marcin Koprowski, Sandra Metslaid, András Morgós, Oleksandr Khodosovtsev, Aleksei Potapov, Michal Rybníček, Irena Sochová, Kristina Sohar, Vasyl Budzhak, Ewa Zin, Tassilo Schneider, Wojciech Gil, Marcin Klisz
    Global Change Biology, 2025
    Climate is a primary, but non‐stationary, driver of tree growth. Climate change is altering the sensitivity of forest growth to water availability and temperature over time. It is considered that pedunculate oak ( Quercus robur L.) will cope with the changing climatic conditions in Europe in the near future. However, while species distribution models project expansion zones, they also identify reductions in occurrence at the dry and warm distribution margins. Whereas species distribution models primarily rely on occurrence data, tree rings—given their long‐term perspective and their use in empirical models—can provide a mechanistic view of forest growth dynamics, including temporally changing climate responses. Increased climate sensitivity and growth synchrony are key dendroecological indicators of tree stress. Here, we used an unprecedented network of 150 Q. robur sites (over 3300 trees), covering the full projected range of contracting to persistent areas across Europe, to assess the dendroecological indicators over recent decades in relation to species distribution model predictions. We reveal that oaks in areas projected to experience range contraction exhibited greater sensitivity to current growing season climatic conditions, whereas those in persistence areas responded more strongly to previous season conditions. Growth synchrony among trees was higher in the contraction areas, but showed no significant increasing trend over the last 70 years, as expected from ecotone theory. Temporal shifts in climate sensitivity were stronger for temperature and vapor pressure deficit in the persistence areas, whereas the climatic water balance gained importance in the contraction zones. These findings suggest that Q. robur growth is not yet being severely affected by climate change, and that the species is currently coping well with the climate changes, even in regions with projected range contractions, thereby challenging statistically derived scenarios of range shift based on species distribution models.
  • Impact of pollution on the temperature sensitivity of multiple Norway spruce tree-ring parameters in Central Europe
    Yumei Jiang, Krešimir Begović, Martin Lexa, Juliana Nogueira, Georg von Arx, Jan Tumajer, Ryszard Kaczka, Filip Oulehle, Nataliya Korolyova, Jesper Björklund, Kristina Seftigen, Vaclav Treml, Rob Wilson, Miloš Rydval
    Agricultural and Forest Meteorology, 2025
    Central European forests experienced high rates of air pollution in the second half of the 20th century, especially along the borders of Czechia, Germany and Poland. Consequently, tree-growth declines were detected in heavily polluted forests. However, information about how pollution has influenced growth-climate responses beyond tree-ring width (RW) in pollution-affected forests remains sparse. In this study, we investigated the impact of high-level pollution during 1960s-1980s in Central Europe on the climatic signals of various tree-ring parameters of Norway spruce, including RW, latewood Blue Intensity (LWBI), and maximum cell wall thickness (CWT), to understand how tree growth and climatic sensitivity were affected. Tree-ring cores were collected from six temperature-limited high-elevation sites within four pollution-affected regions in Czechia and northern Slovakia. RW and LWBI were measured for all samples and CWT was produced from two sites with contrasting pollution impacts. Distinct pollution-related RW growth suppression was detected in 1970s to 1980s at several sites. LWBI and CWT chronologies were highly correlated (r LWBI = 0.52–0.75; r CWT = 0.63–0.68) with growing season (April-September) temperature and did not exhibit clear signs of distortion by pollution compared to RW (r RW = 0.28–0.58). Pollution stress seemed to reduce tree growth by decreasing cell numbers and made RW less sensitive to climate. This study reveals that impacts of pollution on different tree-ring parameters varied which can further influence their climatic sensitivities. It provides valuable insight in improving the utility of pollution-affected tree-ring chronologies by choosing appropriate parameters, which can ultimately contribute to substantially improving the calibration of climate reconstructions from heavily polluted regions.
  • Rapid trend towards larger and more moisture-limited trees in Central-European temperate forests
    Václav Treml, Jan Tumajer, Filip Oulehle, Jan Altman, Jiří Doležal, Monika Vejpustková, Miloš Rydval, Nela Altmanová, Lukáš Brůha, Vojtěch Čada, Pavel Fibich, Ryszard Kaczka, Jakub Kašpar, Tomáš Kolář, Jan Krejza, Jiří Mašek, Sergei Mikhailov, Pavel Šamonil, Michal Rybníček, Marko Stojanović, Jan Svoboda, Miroslav Svoboda, Iva Vašíčková
    Environmental Research Letters, 2025
    Tree stems represent a long-lived biomass compartment for atmospheric carbon sequestration. While terrestrial biosphere models predict rising carbon sequestration in forests, direct observations of tree growth are inconclusive due to varying standardization procedures of tree-ring series and complex factors influencing stem growth such as moisture and nutrient deficits and anthropogenic carbon and nitrogen fertilization. The mismatch between tree-ring-based observations, repeated inventories at permanent plots, and predictions of biospheric models represents a significant knowledge gap limiting forecasting of future forest growth. Using the novel approach free of tree-ring standardization trials and focusing on even-aged trees sampled from uneven-aged forest stands, we present a robust comparison of tree stem diameter changes in temperate forests between 1990 and 2015 along environmental gradients in Central Europe. The stem sizes of four out of five species showed significant enlargement while also partly increasing stem growth limitation due to moisture availability. The largest increase in stem diameter was recorded for late succession species on fertile sites. By contrast, the stem size of early-succession species on dry and nutrient-poor sites remained unaltered. Stems of mature trees in present-day forests are, on average, 8% thicker than their counterparts in 1990 consistent with trends predicted by terrestrial biosphere models. We demonstrated that, despite increasing drought limitation, temperate tree species enlarged their stems. Viewed in conjunction with older permanent plot data, Central-European temperate forests exhibited almost half century of continuous stem enlargement, potentially impacting forest functioning in terms of size-sensitive characteristics such as susceptibility to drought and disturbances.
  • Blue intensity, tree-ring dimensions, earlywood vessels and flood rings in floodplain Fraxinus pennsylvanica trees, central Canada
    Jacques C. Tardif, Ryszard J. Kaczka, France Conciatori
    Dendrochronologia, 2025
    Flood rings have been identified in numerous floodplain ring-porous tree species of the genus Fraxinus and Quercus . They are generally characterized by an earlywood having more numerous vessels with smaller cross-sectional area compared to “normal” tree ring. In recent years, blue intensity (BI) has developed as a surrogate method to determine tree-ring density. The method, so far, has been restricted to coniferous species. No studies have assessed the utility of BI in floodplain ring-porous species and its association, among others, with earlywood vessel features and hydrological conditions. In this study, twenty green ash ( Fraxinus pennsylvanica Marsh.) trees were analysed. Flood rings were identified with both cross-sectional area of all earlywood vessels ≥ 1000 µm 2 and BI measured. Results indicated strong associations among given BI, tree-ring dimension, earlywood vessel and flood-ring chronologies. For instance, both earlywood BI (especially EW10BI) and Delta BI (DBI) showed significant inversed associations with earlywood porosity and with flood-ring abundance. These BI parameters were also strongly associated with spring discharge. In green ash, tree rings formed in years leading to flood-ring formation were characterized by increased earlywood density (higher blue intensity caused by an alteration in size and arrangement of earlywood vessels) and, to a lesser extent, by reduced latewood density. The BI features derived from the earlywood and the entire tree ring both prove to effectively complement visual identification of flood ring. Blue intensity in ring-porous species may prove useful in dendrohydrological reconstructions and also in wood sciences, i.e., when estimating tree-ring density is desired. In regards to ring-porous species, further work is warranted comparing software differences in determining BI, evaluating BI signal in other species and from various hydrological regimes.
  • A definition and standardised terminology for Blue Intensity from Conifers
    Jesper Björklund, Kristina Seftigen, Ryszard J. Kaczka, Miloš Rydval, Rob Wilson
    Dendrochronologia, 2024
    The published literature of the past 20 years expresses inconsistent terminology for the Blue Intensity (BI) method that could lead to confusion in analysis and interpretation. In this technical note we propose a standard terminology based around the prevalent use of BI for the variant that is positively correlated with wood density derived from X-ray and equivalent wood anatomical techniques. We highlight significant practical advantages of this standard terminology for data analysis, scientific interpretations as well as archiving, and provide some cautionary examples that could occur if not adhering to this terminology. In future studies using BI, we recommend to explicitly clarify that the standard terminology is used with the following phrase: The BI data produced in this study is consistent with the ‘2024 BI standard terminology’.
  • Incorporating high-resolution climate, remote sensing and topographic data to map annual forest growth in central and eastern Europe
    Jernej Jevšenak, Marcin Klisz, Jiří Mašek, Vojtěch Čada, Pavel Janda, Miroslav Svoboda, Ondřej Vostarek, Vaclav Treml, Ernst van der Maaten, Andrei Popa, Ionel Popa, Marieke van der Maaten-Theunissen, Tzvetan Zlatanov, Tobias Scharnweber, Svenja Ahlgrimm, Juliane Stolz, Irena Sochová, Cătălin-Constantin Roibu, Hans Pretzsch, Gerhard Schmied, Enno Uhl, Ryszard Kaczka, Piotr Wrzesiński, Martin Šenfeldr, Marcin Jakubowski, Jan Tumajer, Martin Wilmking, Nikolaus Obojes, Michal Rybníček, Mathieu Lévesque, Aleksei Potapov, Soham Basu, Marko Stojanović, Stefan Stjepanović, Adomas Vitas, Domen Arnič, Sandra Metslaid, Anna Neycken, Peter Prislan, Claudia Hartl, Daniel Ziche, Petr Horáček, Jan Krejza, Sergei Mikhailov, Jan Světlík, Aleksandra Kalisty, Tomáš Kolář, Vasyl Lavnyy, Maris Hordo, Walter Oberhuber, Tom Levanič, Ilona Mészáros, Lea Schneider, Jiří Lehejček, Rohan Shetti, Michal Bošeľa, Paul Copini, Marcin Koprowski, Ute Sass-Klaassen, Şule Ceyda Izmir, Remigijus Bakys, Hannes Entner, Jan Esper, Karolina Janecka, Edurne Martinez del Castillo, Rita Verbylaite, Mátyás Árvai, Justine Charlet de Sauvage, Katarina Čufar, Markus Finner, Torben Hilmers, Zoltán Kern, Klemen Novak, Radenko Ponjarac, Radosław Puchałka, Bernhard Schuldt, Nina Škrk Dolar, Vladimir Tanovski, Christian Zang, Anja Žmegač, Cornell Kuithan, Marek Metslaid, Eric Thurm, Polona Hafner, Luka Krajnc, Mauro Bernabei, Stefan Bojić, Robert Brus, Andreas Burger, Ettore D'Andrea, Todor Đorem, Mariusz Gławęda, Jožica Gričar, Marko Gutalj, Emil Horváth, Saša Kostić, Bratislav Matović, Maks Merela, Boban Miletić, András Morgós, Rafał Paluch, Kamil Pilch, Negar Rezaie, Julia Rieder, Niels Schwab, Piotr Sewerniak, Dejan Stojanović, Tobias Ullmann, Nella Waszak, Ewa Zin, Mitja Skudnik, Krištof Oštir, Anja Rammig, Allan Buras
    Science of the Total Environment, 2024
    To enhance our understanding of forest carbon sequestration, climate change mitigation and drought impact on forest ecosystems, the availability of high-resolution annual forest growth maps based on tree-ring width (TRW) would provide a significant advancement to the field. Site-specific characteristics, which can be approximated by high-resolution Earth observation by satellites (EOS), emerge as crucial drivers of forest growth, influencing how climate translates into tree growth. EOS provides information on surface reflectance related to forest characteristics and thus can potentially improve the accuracy of forest growth models based on TRW. Through the modelling of TRW using EOS, climate and topography data, we showed that species-specific models can explain up to 52 % of model variance (Quercus petraea), while combining different species results in relatively poor model performance (R2 = 13 %). The integration of EOS into models based solely on climate and elevation data improved the explained variance by 6 % on average. Leveraging these insights, we successfully generated a map of annual TRW for the year 2021. We employed the area of applicability (AOA) approach to delineate the range in which our models are deemed valid. The calculated AOA for the established forest-type models was 73 % of the study region, indicating robust spatial applicability. Notably, unreliable predictions predominantly occurred in the climate margins of our dataset. In conclusion, our large-scale assessment underscores the efficacy of combining climate, EOS and topographic data to develop robust models for mapping annual TRW. This research not only fills a critical void in the current understanding of forest growth dynamics but also highlights the potential of integrated data sources for comprehensive ecosystem assessments.
  • Shifting climatic responses of tree rings and NDVI along environmental gradients
    Jiří Mašek, Jan Tumajer, Jelena Lange, Monika Vejpustková, Jakub Kašpar, Pavel Šamonil, Tomáš Chuman, Tomáš Kolář, Michal Rybníček, Michal Jeníček, Ivana Vašíčková, Vojtěch Čada, Ryszard Kaczka, Miloš Rydval, Miroslav Svoboda, Ondřej Nedělčev, Martin Hais, Václav Treml
    Science of the Total Environment, 2024
  • Major tree species of Central European forests differ in their proportion of positive, negative, and nonstationary growth trends
    Jakub Kašpar, Jan Tumajer, Jan Altman, Nela Altmanová, Vojtěch Čada, Tomáš Čihák, Jiří Doležal, Pavel Fibich, Pavel Janda, Ryszard Kaczka, Tomáš Kolář, Jiří Lehejček, Jiří Mašek, Kateřina Neudertová Hellebrandová, Michal Rybníček, Miloš Rydval, Rohan Shetti, Miroslav Svoboda, Martin Šenfeldr, Pavel Šamonil, Ivana Vašíčková, Monika Vejpustková, Václav Treml
    Global Change Biology, 2024
    Temperate forests are undergoing significant transformations due to the influence of climate change, including varying responses of different tree species to increasing temperature and drought severity. To comprehensively understand the full range of growth responses, representative datasets spanning extensive site and climatic gradients are essential. This study utilizes tree‐ring data from 550 sites from the temperate forests of Czechia to assess growth trends of six dominant Central European tree species (European beech, Norway spruce, Scots pine, silver fir, sessile and pedunculate oak) over 1990–2014. By modeling mean growth series for each species and site, and employing principal component analysis, we identified the predominant growth trends. Over the study period, linear growth trends were evident across most sites (56% increasing, 32% decreasing, and 10% neutral). The proportion of sites with stationary positive trends increased from low toward high elevations, whereas the opposite was true for the stationary negative trends. Notably, within the middle range of their distribution (between 500 and 700 m a.s.l.), Norway spruce and European beech exhibited a mix of positive and negative growth trends. While Scots pine growth trends showed no clear elevation‐based pattern, silver fir and oaks displayed consistent positive growth trends regardless of site elevation, indicating resilience to the ongoing warming. We demonstrate divergent growth trajectories across space and among species. These findings are particularly important as recent warming has triggered a gradual shift in the elevation range of optimal growth conditions for most tree species and has also led to a decoupling of growth trends between lowlands and mountain areas. As a result, further future shifts in the elevation range and changes in species diversity of European temperate forests can be expected.
  • Variability in Tree-ring Width and NDVI Responses to Climate at a Landscape Level
    Jiří Mašek, Jan Tumajer, Jelena Lange, Ryszard Kaczka, Petr Fišer, Václav Treml
    Ecosystems, 2023
    Inter-annual climatically driven growth variability of above-ground biomass compartments (for example, tree stems and foliage) controls the intensity of carbon sequestration into forest ecosystems. However, understanding the differences between the climatic response of stem and foliage at the landscape level is limited. In this study, we examined the climate-growth response of stem and leaf biomass and their relationship forPinus sylvestris(PISY) andPicea abies(PCAB) in topographically complex landscapes. We used tree-ring width chronologies and time series of the normalized difference vegetation index (NDVI) derived from high-resolution Landsat scenes as proxies for stem and leaf biomass, respectively. We then compared growth variability and climate-growth relationships of both biomass proxies between topographical categories. Our results show that the responses of tree rings to climate differ significantly from those found in NDVI, with the stronger climatic signal observed in tree rings. Topography had distinct but species-specific effects: At moisture-limited PISY stands, stem biomass (tree rings) was strongly topographically driven, and leaf biomass (NDVI) was relatively insensitive to topographic variability. In landscapes close to the climatic optimum of PCAB, the relationship between stem and leaf biomass was weak, and their correlations with climate were often inverse, with no significant effects of topography. Different climatic signals from NDVI and tree rings suggest that the response of canopy and stem growth to climate change might be decoupled. Furthermore, our results hint toward different prioritizations of biomass allocation in trees under stressful conditions which might change allometric relationships between individual tree compartments in the long term.
  • European Dendroecological Fieldweek (EDF) 2021 in Val Müstair, Switzerland: International education and research during the pandemic
    Kerstin Treydte, Elisabet Martínez-Sancho, Isabel Dorado-Liñán, Ryszard J. Kaczka, Linda Feichtinger, Anne Verstege, Kelley R. Bassett, Patrick Cassitti, Roberta D'Andrea, Olympia Facchinetti, Costanza M. Fileccia, Nazimul Islam, Andreas Kessler, Natalie Korolyova, Nadine Kunz, Mia Marušić, Jiří Mašek, Nikolaus Obojes, Lara Oxley, Viviane Rennhard, Emmanuel Schaad, Gerhard Schmied, Mathias Seifert, Hernán Serrano-León, Krunoslav Sever, Andreea P. Spînu, Marco Vuerich, Alma Piermattei, Alan Crivellaro
    Dendrochronologia, 2023
  • Ecological and methodological drivers of non-stationarity in tree growth response to climate
    Jan Tumajer, Krešimir Begović, Vojtěch Čada, Michal Jenicek, Jelena Lange, Jiří Mašek, Ryszard J. Kaczka, Miloš Rydval, Miroslav Svoboda, Lukáš Vlček, Václav Treml
    Global Change Biology, 2023
  • Video tutorial: Measuring blue intensity with the CooRecorder software application
    Karen J. Heeter, Daniel J. King, Grant L. Harley, Ryszard J. Kaczka
    Dendrochronologia, 2022
  • Regional Patterns of Late Medieval and Early Modern European Building Activity Revealed by Felling Dates
    Fredrik Charpentier Ljungqvist, Andrea Seim, Willy Tegel, Paul J. Krusic, Claudia Baittinger, Christelle Belingard, Mauro Bernabei, Niels Bonde, Paul Borghaerts, Yann Couturier, Anne Crone, Sjoerd van Daalen, Aoife Daly, Petra Doeve, Marta Domínguez-Delmás, Jean-Louis Edouard, Thomas Frank, Christian Ginzler, Michael Grabner, Friederike M. Gschwind, Kristof Haneca, Anton Hansson, Franz Herzig, Karl-Uwe Heussner, Jutta Hofmann, David Houbrechts, Ryszard J. Kaczka, Tomáš Kolář, Raymond Kontic, Tomáš Kyncl, Vincent Labbas, Per Lagerås, Yannick Le Digol, Melaine Le Roy, Hanns Hubert Leuschner, Hans Linderson, Francis Ludlow, Axel Marais, Coralie M. Mills, Mechthild Neyses-Eiden, Kurt Nicolussi, Christophe Perrault, Klaus Pfeifer, Michal Rybníček, Andreas Rzepecki, Martin Schmidhalter, Mathias Seifert, Lisa Shindo, Barbara Spyt, Josué Susperregi, Helene Løvstrand Svarva, Terje Thun, Felix Walder, Tomasz Ważny, Elise Werthe, Thorsten Westphal, Rob Wilson, Ulf Büntgen
    Frontiers in Ecology and Evolution, 2022
  • Diverging growth performance of co-occurring trees (Picea abies) and shrubs (Pinus mugo) at the treeline ecotone of Central European mountain ranges
    Martin Šenfeldr, Ryszard Kaczka, Allan Buras, Alina Samusevich, Corinna Herrmann, Barbara Spyt, Annette Menzel, Václav Treml
    Agricultural and Forest Meteorology, 2021
  • I-BIND: International Blue intensity network development working group
    Ryszard J. Kaczka, Rob Wilson
    Dendrochronologia, 2021
  • Debris flooding magnitude estimation based on relation between dendrogeomorphological and meteorological records
    Andrej Novak, Tomislav Popit, Tom Levanič, Andrej Šmuc, Ryszard J. Kaczka
    Geomorphology, 2020
  • Higher Winter-Spring Temperature and Winter-Spring/Summer Moisture Availability Increase Scots Pine Growth on Coastal Dune Microsites Around the South Baltic Sea
    Karolina Janecka, Jill E. Harvey, Mario Trouillier, Ryszard J. Kaczka, Sandra Metslaid, Marek Metslaid, Allan Buras, Martin Wilmking
    Frontiers in Forests and Global Change, 2020
  • Tree growth influenced by warming winter climate and summer moisture availability in northern temperate forests
    Jill E. Harvey, Marko Smiljanić, Tobias Scharnweber, Allan Buras, Anna Cedro, Roberto Cruz‐García, Igor Drobyshev, Karolina Janecka, Āris Jansons, Ryszard Kaczka, Marcin Klisz, Alar Läänelaid, Roberts Matisons, Lena Muffler, Kristina Sohar, Barbara Spyt, Juliane Stolz, Ernst van der Maaten, Marieke van der Maaten‐Theunissen, Adomas Vitas, Robert Weigel, Jürgen Kreyling, Martin Wilmking
    Global Change Biology, 2020
  • Compression wood has a minor effect on the climate signal in tree-ring stable isotope records of montane Norway spruce
    Karolina Janecka, Ryszard J Kaczka, Holger Gärtner, Jill E Harvey, Kerstin Treydte
    Tree Physiology, 2020
  • Ecological relationships at a near-natural treeline, rolwaling valley, nepal himalaya: Implications for the sensitivity to climate change
    Niels Schwab, Karolina Janecka, Ryszard J. Kaczka, Jürgen Böhner, Ram Prasad Chaudhary, Thomas Scholten, Udo Schickhoff
    Erdkunde, 2020
  • Scientific Merits and Analytical Challenges of Tree-Ring Densitometry
    J. Björklund, G. von Arx, D. Nievergelt, R. Wilson, J. Van den Bulcke, B. Günther, N. J. Loader, M. Rydval, P. Fonti, T. Scharnweber, L. Andreu‐Hayles, U. Büntgen, R. D'Arrigo, N. Davi, T. De Mil, J. Esper, H. Gärtner, J. Geary, B. E. Gunnarson, C. Hartl, A. Hevia, H. Song, K. Janecka, R. J. Kaczka, A. V. Kirdyanov, M. Kochbeck, Y. Liu, M. Meko, I. Mundo, K. Nicolussi, R. Oelkers, T. Pichler, R. Sánchez‐Salguero, L. Schneider, F. Schweingruber, M. Timonen, V. Trouet, J. Van Acker, A. Verstege, R. Villalba, M. Wilmking, D. Frank
    Reviews of Geophysics, 2019
  • No systematic effects of sampling direction on climate-growth relationships in a large-scale, multi-species tree-ring data set
    Urs Gut, Mátyás Árvai, Szymon Bijak, J. Julio Camarero, Anna Cedro, Roberto Cruz-García, Balázs Garamszegi, Andrew Hacket-Pain, Andrea Hevia, Weiwei Huang, Miriam Isaac-Renton, Ryszard J. Kaczka, Marko Kazimirović, Wojciech Kędziora, Zoltán Kern, Marcin Klisz, Tomáš Kolář, Michael Körner, Veronica Kuznetsova, David Montwé, Any Mary Petritan, Ion Catalin Petritan, Lenka Plavcová, Romy Rehschuh, Eva Rocha, Michal Rybníček, Raúl Sánchez-Salguero, Jens Schröder, Niels Schwab, Branko Stajić, Robert Tomusiak, Martin Wilmking, Ute Sass-Klaassen, Allan Buras
    Dendrochronologia, 2019
  • Divergent growth of Norway spruce on Babia Góra Mountain in the western Carpathians
    Allan Buras, Barbara Spyt, Karolina Janecka, Ryszard Kaczka
    Dendrochronologia, 2018
  • Different maximum latewood density and blue intensity measurements techniques reveal similar results
    Ryszard J. Kaczka, Barbara Spyt, Karolina Janecka, Ilka Beil, Ulf Büntgen, Tobias Scharnweber, Daniel Nievergelt, Martin Wilmking
    Dendrochronologia, 2018
  • Climate change-induced shift of tree growth sensitivity at a central Himalayan treeline ecotone
    Niels Schwab, Ryszard Kaczka, Karolina Janecka, Jürgen Böhner, Ram Chaudhary, Thomas Scholten, Udo Schickhoff
    Forests, 2018
  • Snow avalanche activity in Żleb Żandarmerii in a time of climate change (Tatra Mts., Poland)
    Bogdan Gądek, Ryszard J. Kaczka, Zofia Rączkowska, Elżbieta Rojan, Alejandro Casteller, Peter Bebi
    Catena, 2017
  • Potential and limitation of combining terrestrial and marine growth records from Iceland
    A. Piermattei, C. Urbinati, E. Tonelli, Ó. Eggertsson, T. Levanič, R.J. Kaczka, C. Andrew, B.R. Schöne, U. Büntgen
    Global and Planetary Change, 2017
  • Changes of flood risk on the northern foothills of the Tatra Mountains
    Z. W. Kundzewicz, M. Stoffel, B. Wyżga, V. Ruiz-Villanueva, T. Niedźwiedź, R. Kaczka, J. A. Ballesteros-Cánovas, I. Pińskwar, E. Łupikasza, J. Zawiejska, P. Mikuś, A. Choryński, H. Hajdukiewicz, B. Spyt, K. Janecka
    Acta Geophysica, 2017
  • An intensive tree-ring experience: Connecting education and research during the 25th European Dendroecological Fieldweek (Asturias, Spain)
    Raúl Sánchez-Salguero, Andrea Hevia, J. Julio Camarero, Kerstin Treydte, Dave Frank, Alan Crivellaro, Marta Domínguez-Delmás, Lena Hellman, Ryszard J. Kaczka, Margot Kaye, Linar Akhmetzyanov, Muhammad Waseem Ashiq, Upasana Bhuyan, Olesia Bondarenko, Álvaro Camisón, Sien Camps, Vicenta Constante García, Filipe Costa Vaz, Ionela G. Gavrila, Erik Gulbranson, Heli Huhtamaa, Karolina Janecka, Darren Jeffers, Matthias Jochner, Tomáš Koutecký, Mostafa Lamrani-Alaoui, Julie Lebreton-Anberrée, María Martín Seijo, Pawel Matulewski, Sandra Metslaid, Sergiu Miron, Robert Morrisey, Jorgen Opdebeeck, Svyatoslav Ovchinnikov, Richard Peters, Any M. Petritan, Margarita Popkova, Stepanka Rehorkova, María O. Rodríguez Ariza, Ángela Sánchez-Miranda, Marjolein Van der Linden, Astrid Vannoppen, Daniel Volařík
    Dendrochronologia, 2017
  • Log transport and deposition in incised, channelized, and multithread reaches of a wide mountain river: Tracking experiment during a 20-year flood
    Bartłomiej Wyżga, Paweł Mikuś, Joanna Zawiejska, Virginia Ruiz-Villanueva, Ryszard J. Kaczka, Wiktoria Czech
    Geomorphology, 2017
  • Paleoflood discharge reconstruction in Tatra Mountain streams
    Juan Antonio Ballesteros-Cánovas, Markus Stoffel, Barbara Spyt, Karolina Janecka, Ryszard J. Kaczka, Michał Lempa
    Geomorphology, 2016
  • Growth trends and climate responses of Norway spruce along elevational gradients in East-Central Europe
    Tereza Ponocná, Barbara Spyt, Ryszard Kaczka, Ulf Büntgen, Václav Treml
    Trees Structure and Function, 2016
  • Combining tree-ring dating and geomorphological analyses in the reconstruction of spatial patterns of the runout zone of snow avalanches, Rybi Potok Valley, Tatra Mountains
    Michał Lempa, Ryszard J. Kaczka, Zofia Rączkowska, Karolina Janecka
    Geographia Polonica, 2016
  • Application of timberline morphometric analysis for detecting snow avalanche paths: A case study of the Tatra Mountains
    Barbara Spyt, Ryszard J. Kaczka, Michał Lempa, Zofia Rączkowska
    Geographia Polonica, 2016
  • Deciphering flood event information from tree-ring data in the Tatra Mountains: Implications for hazard assessment
    Juan Ballesteros-Cánovas, Barbara Spyt, Karolina Janecka, Ryszard J. Kaczka, Markus Stoffel
    Geoplanet Earth and Planetary Sciences, 2016
  • Climate reconstruction from tree-rings in the tatra mountains
    Ryszard J. Kaczka, Barbara Spyt, Karolina Janecka, Tadeusz Niedźwiedź, Zdzisław Bednarz
    Geoplanet Earth and Planetary Sciences, 2016
  • Not only climate: Interacting drivers of treeline change in Europe
    Dominik Kulakowski, Ignacio Barbeito, Alejandro Casteller, Ryszard J. Kaczka, Peter Bebi
    Geographia Polonica, 2016
  • Methods to assess large wood dynamics and the associated flood hazard in Polish Carpathian watercourses of different size
    Paweł Mikuś, Bartłomiej Wyżga, Virginia Ruiz-Villanueva, Joanna Zawiejska, Ryszard J. Kaczka, Markus Stoffel
    Geoplanet Earth and Planetary Sciences, 2016
  • The pyramid – The highest research station in the world
    Geographia Polonica, 2015
  • The dynamics of the timberline ecotone on the asymmetric ridge of the babia gÓra massif, western carpathians
    Barbara Czajka, Adam Łajczak, Ryszard J. Kaczka
    Geographia Polonica, 2015
  • The tree-ring growth responses to climate in the timberline ecotone of babia góra mountain
    Ryszard J. Kaczka, Barbara Czajka, Adam Łajczak
    Geographia Polonica, 2015
  • The influence of snow avalanches on the timberline in the babia gÓra massif, western carpathians
    Barbara Czajka, Adam Łajczak, Ryszard J. Kaczka
    Geographia Polonica, 2015
  • Geographical characteristics of the timberline in the carpathians
    Barbara Czajka, Adam Łajczak, Ryszard J. Kaczka
    Geographia Polonica, 2015
  • Timberline in the carpathians: An overview
    Barbara Czajka, Adam Łajczak, Ryszard J. Kaczka, Paweł Nicia
    Geographia Polonica, 2015
  • The timberline as result of the interactions among forest, abiotic environment and human activity in the babia gÓra mt., western carpathians
    Ryszard J. Kaczka, Barbara Czajka, Adam Łajczak, Jerzy Szwagrzyk, Paweł Nicia
    Geographia Polonica, 2015
  • The recent timberline changes in the tatra mountains: A case study of the mengusovská valley (Slovakia) and the rybi potok valley (Poland)
    Ryszard J. Kaczka, Michał Lempa, Barbara Czajka, Karolina Janecka, Zofia Rączkowska, Juraj Hreško, Gabriel Bugar
    Geographia Polonica, 2015
  • Flash floods in the Tatra Mountain streams: Frequency and triggers
    J.A. Ballesteros-Cánovas, B. Czajka, K. Janecka, M. Lempa, R.J. Kaczka, M. Stoffel
    Science of the Total Environment, 2015
  • Contrasting patterns of wood storage in mountain watercourses narrower and wider than the height of riparian trees
    Bartłomiej Wyżga, Joanna Zawiejska, Paweł Mikuś, Ryszard J. Kaczka
    Geomorphology, 2015
  • The new features of landslide relief discovered using LiDAR - Case study from Babia Góra Massif, Western Carpathian Mountains
    Adam Łajczak, Barbara Czajka, Ryszard J. Kaczka
    Quaestiones Geographicae, 2014
  • Floods at the northern foothills of the Tatra Mountains - A Polish-Swiss research project
    Zbigniew W. Kundzewicz, Markus Stoffel, Ryszard J. Kaczka, Bartłomiej Wyżga, Tadeusz Niedźwiedź, Iwona Pińskwar, Virginia Ruiz-Villanueva, Ewa Łupikasza, Barbara Czajka, Juan Antonio Ballesteros-Canovas, Łukasz Małarzewski, Adam Choryński, Karolina Janecka, Paweł Mikuś
    Acta Geophysica, 2014
  • Islands in a European mountain river: Linkages with large wood deposition, flood flows and plant diversity
    Paweł Mikuś, Bartłomiej Wyżga, Ryszard J. Kaczka, Edward Walusiak, Joanna Zawiejska
    Geomorphology, 2013
  • Ensemble estimates reveal a complex hydroclimatic sensitivity of pine growth at Carpathian cliff sites
    Ulf Büntgen, Ryszard J. Kaczka, Miroslav Trnka, Andreas Rigling
    Agricultural and Forest Meteorology, 2012
  • Occurrence and selected morphometric features of debris flow tracks in the Tatra mountains and the Karkonosze mountains
    Czasopismo Geograficzne, 2012
  • Storage patterns of large woody debris in mountain watercourses of medium and large width
    Prace I Studia Geograficzne, 2012
  • High-Precision Dating of Debris-Flow Events Within the Growing Season
    Ryszard J. Kaczka, Anne Deslauriers, Hubert Morin
    Advances in Global Change Research, 2010
  • Growth responses to climate in a multi-species tree-ring network in the Western Carpathian Tatra Mountains, Poland and Slovakia
    U. Buntgen, D. C. Frank, R. J. Kaczka, A. Verstege, T. Zwijacz-Kozica, J. Esper
    Tree Physiology, 2007