To What Extent Can Oxygen Isotopes in Tree Rings and Precipitation Be Used to Reconstruct Past Atmospheric Temperature? A Case Study |
| |
| Authors: | Martine Rebetez Matthias Saurer Paolo Cherubini |
| |
| Institution: | (1) Long-Term Forest Ecosystem (LWF), WSL, WSL Swiss Federal Research Institute, CP 96, CH-1015 Lausanne, Switzerland;(2) PSI Swiss Federal Research Institute, Villigen, Switzerland;(3) WSL Swiss Federal Research Institute, Birmensdorf, Switzerland |
| |
| Abstract: | We analyzed the relationship between air temperature and oxygen isotopes measured in tree rings of silver fir (Abies alba Mill.) from along-term forest ecosystem research plot in the Swiss Jura mountains (LWF project). The oxygen isotope data were compared with a century-long meteorological series of air temperature data. Measurements of oxygen isotope ratios in precipitation were also used for comparison. Results show that the late-wood tree-ring series is significantly correlated with May to August temperatures. Correlations were higher for maximum (daytime) air temperature and even better for air temperature measured on rainy days only. We stress that trends in maximum temperature series for this time of the year, like trends in oxygen isotope ratios series from tree rings, are completely different from trends in yearly mean temperature. Indeed, maximum temperature trends during the vegetation period slightly decreased during the 20thcentury, whereas yearly means increased strongly. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
