Tree-ring δ18O from an alpine catchment reveals changes in glacier stream water inputs between 1980 and 2010
| Autor: | Rolf T. W. Siegwolf, Matthias Saurer, Maria Letizia Fumagalli, Giovanni Leonelli, Barbara Stenni, Paolo Cherubini, Giovanna Battipaglia, Manuela Pelfini, Valter Maggi, Maurizio Maugeri |
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| Přispěvatelé: | Leonelli, G, Battipaglia, G, Cherubini, P, Saurer, M, Siegwolf, R, Maugeri, M, Stenni, B, Fumagalli, M, Pelfini, M, Maggi, V, Leonelli, Giovanni, Battipaglia, Giovanna, Cherubini, Paolo, Saurer, Matthia, Siegwolf, Rolf T. W., Maugeri, Maurizio, Stenni, Barbara, Fumagalli, Maria Letizia, Pelfini, Manuela, Maggi, Valter |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Tree-ring stable isotopes
δ18O European larch Drainage basin chemistry.chemical_element Water stable isotopes Water stable isotope Forni Glacier Tree-ring stable isotope Isotopes of oxygen lcsh:QH540-549.5 Dendrochronology lcsh:Environmental sciences Ecology Evolution Behavior and Systematics Earth-Surface Processes lcsh:GE1-350 Global and Planetary Change geography geography.geographical_feature_category Glacier meltwater biology European Larch Glacier biology.organism_classification chemistry Settore GEO/08 - Geochimica e Vulcanologia Environmental science lcsh:Ecology Physical geography Carbon |
| Zdroj: | Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 250-264 (2019) |
| Popis: | The tree-ring stable carbon and oxygen isotope chronologies from two forest sites located in the Forni Glacier forefield (Italy)—one along the glacier stream (GL) and the other toward the valley slope (SL)—were analyzed with the aim of disentangling the precipitation and glacier meltwater inputs in source water δ18O, as reflected by the tree-ring cellulose δ18O. The cellulose δ18O from the GL trees has a negative correlation with winter and summer temperatures, whereas the cellulose δ18O from the SL trees has a positive correlation with precipitation δ18O. The isotopic signature of the source water at the GL site is also influenced by waters of glacial origin, as confirmed by the 18O-depleted glacier meltwater inputs (GMWI_δ18O) estimated by means of an isotope model. The GMWI_δ18O values are consistent with the mean difference measured between the δ18O in the glacier stream and in the precipitation and the winter and summer temperature explains up to 37 percent of the GMWI_δ18O variance. Our results show an increasing influence of glacier meltwater throughout the past decade for the GL site. Our analysis opens new opportunities to reconstruct changes in water regimes of the glacier streams by means of the tree-ring cellulose δ18O. |
| Databáze: | OpenAIRE |
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