The GEOMON network of Czech catchments provides long‐term insights into altered forest biogeochemistry: From acid atmospheric deposition to climate change
| Autor: | Pavel Krám, Miroslav Trnka, Tomáš Navrátil, Tomáš Chuman, Filip Oulehle, Milan Fischer, Miroslav Tesař, Jakub Hruška |
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| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Biogeochemistry 15. Life on land 010501 environmental sciences Throughfall 01 natural sciences Water balance Deposition (aerosol physics) 13. Climate action Streamflow Environmental chemistry Soil water Environmental science Surface runoff Eutrophication 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Hydrological Processes |
| ISSN: | 1099-1085 0885-6087 |
| DOI: | 10.1002/hyp.14204 |
| Popis: | In 1994, a network of small catchments (GEOMON) was established in the Czech Republic to determine input–output element fluxes in semi‐natural forest ecosystems recovering from anthropogenic acidification. The network consists from 16 catchments and the primary observations of elements fluxes were complemented by monitoring of biomass stock, element pools in soil and vegetation, and the main water balance components. Over last three decades, reductions of SO₂, NOₓ and NH₃ emissions were followed by sulphur (S) and nitrogen (N) deposition reductions of 75% and 30%, respectively. Steeper declines of strong acid anion concentrations compared to cations (Ca, Mg, Na, K, NH₄) in precipitation resulted in precipitation pH increase from 4.5 to 5.2 in bulk precipitation and from 4.0 to 5.1 in spruce throughfall. Stream chemistry responded to changes in deposition: S leaching declined. However at majority of catchments soils acted as a net source of S to runoff, delaying recovery. Stream pH increased at acidic streams (pH |
| Databáze: | OpenAIRE |
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