| Autor: |
Córdova, C., Orrego, R., Machuca, Á., Barrera, J. A., Bórquez, J., Stolpe, N. B. |
| Předmět: |
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| Zdroj: |
International Journal of Environmental Science & Technology (IJEST); Sep2022, Vol. 19 Issue 9, p8979-8994, 16p |
| Abstrakt: |
The Patagonia region encompasses pristine ecosystems developed under cold climates. The effect of global warming in the region has not been fully assessed. The objective of this study was to identify susceptible areas to an increase in temperature affecting soil organic carbon mineralization and therefore carbon dioxide emissions. Soil carbon stocks were inferred from land use data obtained from the regional inventory, and regional temperatures were analyzed using Terra moderate-resolution imaging spectroradiometer images in PCI-Geomatica and Idrisi-Selva softwares. Temperature data (monthly, 2000–2012) were classified as: below 1 °C, 1–4 °C, > 4–10 °C, >10–20 °C and > 20 °C. Areas of fragility to soil C mineralization were classified according to the potential response of soil biological activity to the temperature (at 4 °C threshold). The classes analyzed were classified as Fragile-1, being colder and more responsive than Fragile-2 and Fragile-3 categories. Areas of first concern fragility to carbon decomposition occupied around 145,750 ha, representing about 1% of the natural ecosystems of the region. Over 60% of these areas are covered by peatlands. Projections indicate that these fragile ecosystems will be subjected to temperature increases of 1.0 to 1.5 °C in the medium term and to 1.5 to 2.0 °C in the long term, respectively, in the scenario RCP-4.5 of climate change. Under a more severe scenario (RCP-8.5), temperatures will rise + 0.5 °C over the RCP-4.5. The information provided here will address future research and support policy making decisions for the region. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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