Temperaturrekonstruktionen der letzten 140 Jahre am Hohenpeißenberg anhand der Wasserstoffisotopensignatur von Lignin-Methoxygruppen in Baumringen
Zusammenfassung der Projektergebnisse
The goal of this project was to reconstruct mean annual temperatures at Hohenpeißenberg (Germany) for the last 140 years using a high resolution stable hydrogen isotope chronology of lignin methoxyl groups (δ2HLM) in European beech trees. For this, we collected nine increment cores of four Fagus sylvatica trees collected at Hohenpeißenberg (Germany). All cores covered the most recently collected century (1906-2015) and were subsequently used to measure the δ²HLM values at annual resolution. The measured δ²HLM values showed highly significant inter-series correlations (r ranging between 0.37 and 0.73, p < 0.001) among the nine cores over the 1906-2015 period giving confidence to produce a mean δ²HLM chronology. When compared to stable hydrogen isotope values of precipitation (δ²Hprecip) the mean δ²HLM chronology showed the highest correlation with the annually averaged value (r = 0.66, p < 0.001) indicating that the tree source water at the Hohenpeißenberg study site reflects predominantly an annual integral. When compared to instrumental climate data the mean δ²HLM chronology showed further significant correlations with the local mean annual temperature (r = 0.57, p < 0.001) whereby a stronger influence is suggested for large-scale and remote temperature anomalies. Spatial correlations between the mean δ²HLM chronology and land as well as sea surface air temperature trends showed highest correlations for a combined area covering broadly continental and marine Western Europe (r ranging between 0.5 and > 0.6, p < 0.001). We established a linear regression model between the mean δ²HLM chronology and the averaged Western European surface air temperature (WESAT) anomaly yielding a highly significant correlation with r = 0.67 (p < 0.001). When the estimated linear regression model is used to reconstruct WESAT anomalies over the 1916-2015 period the results show a mean absolute deviation of as low as 0.16 °C with respect to instrumental records. Thus, our project provided a valuable calibration study between δ²HLM values in tree-ring series and climate parameters. Based on our results we suggest that the δ²HLM proxy may play an important role in highly resolved climate reconstructions contemplating commonly used dendrochronological climate parameters (TRW and MXD). Furthermore, the δ²HLM proxy showed not only an applicability for recent tree-ring chronologies covering the Late Holocene but also for deep-time Cenozoic mummified wood specimen as could recently be shown in Anhäuser et al. (2018).
Projektbezogene Publikationen (Auswahl)
- 2008. A rapid and precise method for determination of D/H ratios of plant methoxyl groups. Rapid Commun. Mass Spectrom. 22, 3983– 3988
Greule, M., Mosandl, A., Hamilton, J.T.G., Keppler, F.
(Siehe online unter https://dx.doi.org/10.1002/rcm.3817) - 2013. Carbon, hydrogen and oxygen stable isotope ratios of whole wood, cellulose and lignin methoxyl groups of Picea abies as climate proxies. Rapid Commun. Mass Spectrom. 27, 265–275
Gori, Y., Wehrens, R., Greule, M., Keppler, F., Ziller, L., La Porta, N., Camin, F.
(Siehe online unter https://doi.org/10.1002/rcm.6446) - 2014. D/H ratios of methoxyl groups of the sedimentary organic matter of Lake Holzmaar (Eifel, Germany): A potential palaeoclimate/- hydrology proxy. Geochim. Cosmochim. Acta 142, 39–52
Anhäuser, T., Sirocko, F., Greule, M., Esper, J., Keppler, F.
(Siehe online unter https://doi.org/10.1016/j.gca.2014.08.001) - 2015. Stable hydrogen and carbon isotope ratios of methoxyl groups during plant litter degradation. Isotopes Environ. Health Stud. 51, 143–154
Anhäuser, T., Greule, M., Zech, M., Kalbitz, K., McRoberts, C., Keppler, F.
(Siehe online unter https://doi.org/10.1080/10256016.2015.1013540) - 2015. δ2H, δ13C and δ18O from whole wood, α-cellulose and lignin methoxyl groups in Pinus sylvestris: a multi-parameter approach. Isotopes Environ. Health Stud. 51, 553–568
Mischel, M., Esper, J., Keppler, F., Greule, M., Werner, W.
- 2017. Mean annual temperatures of midlatitude regions derived from δ2H values of wood lignin methoxyl groups and its implications for paleoclimate studies. Sci. Total Environ. 574, 1276–1282
Anhäuser, T., Greule, M., Polag, D., Bowen, G.J., Keppler, F.
(Siehe online unter https://doi.org/10.1016/j.scitotenv.2016.07.189) - 2017. Stable hydrogen isotope values of lignin methoxyl groups of four tree species across Germany and their implication for temperature reconstruction. Sci. Total Environ. 579, 263–271
Anhäuser, T., Greule, M., Keppler, F.
(Siehe online unter https://doi.org/10.1016/j.scitotenv.2016.11.109) - 2017. Warm season precipitation signal in δ 2 H values of wood lignin methoxyl groups from high elevation larch trees in Switzerland. Rapid Commun. Mass Spectrom. 31, 1589–1598
Riechelmann, D.F.C., Greule, M., Siegwolf, R.T.W., Anhäuser, T., Esper, J., Keppler, F.
(Siehe online unter https://doi.org/10.1002/rcm.7938) - 2018. Earliest Eocene cold period and polar amplification – Insights from δ2H values of lignin methoxyl groups of mummified wood. Palaeogeogr. Palaeoclimatol. Palaeoecol. in revisio, 326–336
Anhäuser, T., Hook, B.A., Halfar, J., Greule, M., Keppler, F.
(Siehe online unter https://doi.org/10.1016/j.palaeo.2018.05.049)
