| Title: | Climate change reflected in 40-year isotopic composition trends of precipitation in Slovenia |
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| Authors: | ID Gačnik, Jan, Institut "Jožef Stefan" (Author)
ID Žagar, Klara, Institut "Jožef Stefan" (Author)
ID Hatvani, István Gábor (Author)
ID Kern, Zoltán (Author)
ID Vreča, Polona, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/journal/environmental-research
 PDF - Presentation file, download (7,50 MB)
MD5: 284464877DF7B84BAB9CD8FA4C097644
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Long-term monitoring of stable isotopes in precipitation (δ18O, δ2 H), alongside meteorological data, is key to understanding how large-scale hydroclimate variability influences regional and local climate. This study presents one of the longest records in Central and Southeastern Europe: the multi-decadal (1981–2024) dataset of monthly composite precipitation stable isotope records from Ljubljana, Slovenia. The δ18O, δ2 H, and d-excess values are increasing (+0.02 ‰, +0.18 ‰, and +0.05 ‰ per year, respectively), consistent with regional warming. Seasonal patterns were evident, with elevated d-excess values during autumn. The decomposition of the δ18O, δ2 H and d-excess time series using Hilbert-Huang Transform revealed statistically significant annual oscillations in all variables. These oscillations correlated strongly with the annual oscillation of temperature, but a lag of 2–3 months was identified for d-excess. Lower-frequency (multi-year) oscillations of d-excess were also observed. HYSPLIT back-trajectory analysis confirmed a significant contribution of Mediterranean-sourced air masses to autumn precipitation, but did not explain d-excess oscillations. Similar results were observed also for coastal (Portoroˇz, Slovenia) and continental (Vienna, Austria) stations. The findings imply an accelerating, exponential-like isotopic response to warming that has already propagated into the water cycle, providing isotope evidence that precipitation-surface water-groundwater interactions in investigated region changed in last decade. |
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| Keywords: | precipitation stable isotopes, trend analysis, Hilbert-Huang transform, ensemble empirical mode decomposition, HYSPLIT |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 30.09.2025 |
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| Article acceptance date: | 05.11.2025 |
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| Publication date: | 05.11.2025 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-11 |
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| Numbering: | Vol. 288, [article no.] 123286 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-24196  |
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| UDC: | 551.58 |
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| ISSN on article: | 1096-0953 |
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| COBISS.SI-ID: | 257145603 |
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| Copyright: | © 2025 The Authors. |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji: Klara Žagar, István Gábor Hatvani, Zoltán Kern, Polona Vreča;
Opis vira z dne 13. 11. 2025;
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| Publication date in DiRROS: | 19.11.2025 |
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| Views: | 121 |
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| Downloads: | 52 |
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