1. Projections of future soil temperature in the western part of the Southeastern Anatolia Project region, Türkiyelyas Sadık Tekkanat, 2025, original scientific article Abstract: Soil temperature (Ts) is crucial for land use and soil management. It has gained importance in climate change research as it reflects the interactions between the atmosphere and biosphere. This study evaluates Ts changes at depths of 5, 10, 20, 50, and 100 cm in the western part of the Southeastern Anatolia Project (W-SAP) region of Türkiye, which has a Mediterranean and hot semi-arid climate, for the period 2030–2090 compared to 1981–2010. The Soil Temperature and Moisture Model (STM2) is used to generate Ts estimates. A temperature increase of 0.7–3.0 °C (RCP4.5) and 0.9–5.5 °C (RCP8.5) is predicted for the 21st century. Extreme Ts values in late-century summers may hinder crop planning. The research provides the first future Ts projections in W-SAP and offers important agro-climatic insights.
Keywords: soil temperature, projection, STM2, Southeastern Anatolia Project, Türkiye
Published in DiRROS: 10.02.2026; Views: 400; Downloads: 102
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2. Platonic configurations of points and linesJurij Kovič, Aleksander Simonič, 2026, original scientific article Abstract: We present some methods for constructing connected spatial geometric configurations $(p_q, n_k)$ of points and lines, preserved by the same isometries of Euclidean space $E^3$ as the predetermined Platonic solid. In this paper, we are mainly interested in configurations $(n_3)$, $(n_4)$, and $(n_5)$, but also in unbalanced configurations $(p_3, n_4)$, $(p_3, n_5)$, and $(p_4, n_5)$.
Keywords: configuration of points and lines, symmetry groups, Platonic solids, centrally symmetric solid, projection from a point
Published in DiRROS: 28.07.2025; Views: 459; Downloads: 229
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3. No future growth enhancement expected at the Northern edge for European beech due to continued water limitationStefan Klesse, Richard Peters, Raquel Alfaro-Sánchez, Vincent Badeau, Claudia Baittinger, Katarina Čufar, Jožica Gričar, Maks Merela, Peter Prislan, Tom Levanič, 2024, original scientific article Abstract: With ongoing global warming, increasing water deficits promote physiological stress on forest ecosystems with negative impacts on tree growth, vitality, and survival. How individual tree species will react to increased drought stress is therefore a key research question to address for carbon accounting and the development of climate change mitigation strategies. Recent tree-ring studies have shown that trees at higher latitudes will benefit from warmer temperatures, yet this is likely highly species-dependent and less well-known for more temperate tree species. Using a unique pan-European tree-ring network of 26,430 European beech (Fagus sylvatica L.) trees from 2118 sites, we applied a linear mixed-effects modeling framework to (i) explain variation in climate-dependent growth and (ii) project growth for the near future (2021–2050) across the entire distribution of beech. We modeled the spatial pattern of radial growth responses to annually varying climate as a function of mean climate conditions (mean annual temperature, mean annual climatic water balance, and continentality). Over the calibration period (1952–2011), the model yielded high regional explanatory power (R2 = 0.38–0.72). Considering a moderate climate change scenario (CMIP6 SSP2-4.5), beech growth is projected to decrease in the future across most of its distribution range. In particular, projected growth decreases by 12%–18% (interquartile range) in northwestern Central Europe and by 11%–21% in the Mediterranean region. In contrast, climate-driven growth increases are limited to around 13% of the current occurrence, where the historical mean annual temperature was below ~6°C. More specifically, the model predicts a 3%–24% growth increase in the high-elevation clusters of the Alps and Carpathian Arc. Notably, we find little potential for future growth increases (−10 to +2%) at the poleward leading edge in southern Scandinavia. Because in this region beech growth is found to be primarily water-limited, a northward shift in its distributional range will be constrained by water availability.
Keywords: climate change, climate sensitivity, drought, Fagus sylvatica, growth projection, leading edge, trailing edge, tree rings
Published in DiRROS: 10.02.2025; Views: 810; Downloads: 524
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