Helmholtz Centre for Environmental Research - UFZ, Department of Catchment Hydrology, Theodor-Lieser-Str. 4, D-06120 Halle, Germany.
Helmholtz Centre for Environmental Research - UFZ, Department of Catchment Hydrology, Theodor-Lieser-Str. 4, D-06120 Halle, Germany.
Environ Pollut. 2014 Feb;185:281-94. doi: 10.1016/j.envpol.2013.10.030. Epub 2013 Dec 3.
The climate sensitivity of carbon (δ(13)C), oxygen (δ(18)O) and hydrogen (δ(2)H) isotope signatures in tree-ring cellulose of Abies alba Mill. from a marginally industrialized area of Franconia (Germany) was analysed for the last 130 years. All isotopes preserve climatic signals up to c. 1950 AD. After 1950 we observe a clear reduction in climate sensitivity of δ(13)C and δ(2)H while δ(18)O - climate relations remain well pronounced. Nevertheless statistical tests implied that SO2 background emissions of West Germany had influenced isotope signatures long before 1950. The relationships between isotope values and concentrations of SO2, dust, O3 and NO2 at the regional level during the period 1979-2006 indicate that δ(13)C and δ(18)O were influenced primarily by SO2. The impact of SO2 on δ(2)H was negligible, but the observed reduction of climate sensitivity may be caused by synergic influences. The results have significant implications if isotope signatures from tree-rings from anthropogenic influenced regions are used to reconstruct past climate.
对德国弗兰肯边缘工业化地区阿尔卑斯山云杉（Abies alba Mill.）树轮纤维素中的碳（δ(13)C）、氧（δ(18)O）和氢（δ(2)H）同位素特征的气候敏感性进行了分析，时间跨度为过去 130 年。所有同位素都保留了直到公元 1950 年左右的气候信号。1950 年后，我们观察到 δ(13)C 和 δ(2)H 的气候敏感性明显降低，而 δ(18)O-气候关系仍然明显。尽管统计检验表明，早在 1950 年之前，西德的二氧化硫背景排放就已经影响了同位素特征。1979-2006 年期间，在区域水平上，同位素值与 SO2、粉尘、O3 和 NO2 浓度之间的关系表明，δ(13)C 和 δ(18)O 主要受到 SO2 的影响。SO2 对 δ(2)H 的影响可以忽略不计，但观察到的气候敏感性降低可能是协同影响造成的。如果使用受人为影响地区的树木年轮同位素特征来重建过去的气候，那么这些结果具有重要意义。
