Stabile Isotope in der Dendroklimatologie | Stable isotopes and dendroclimatology
Stabile Isotope in der Dendroklimatologie | Stable isotopes and dendroclimatology
复制标题
树状气候学中的稳定同位素|
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
H. Gärtner
中科院分区：
文献类型：
--
作者：
K. Treydte;J. Esper;H. Gärtner
本文阐述了树木年轮中同位素固定的基本原理以及相关的现场和实验室程序。高山地区的例子表明，在树木气候学研究中采用这些方法的潜力和局限性。碳同位素提供关于温度、降水量和相对湿度的季节性信息，而氧同位素提供关于水源水的同位素值的信息，从而提供关于降水量的信息。特别是年际和年代际变化，反映了一个强大的共同的气候信号，延伸到广泛的网站生态。然而，低频率趋势被非气候、人类引起的长期趋势所掩盖，特别是在碳同位素方面。目前，去趋势方法是临时性的，并为古气候问题的稳定同位素设置了限制。高分辨率的植物生理和生化研究应该为这些未解决的问题提供更多的见解。
This paper expounds the basics of isotope fixation in tree rings and relevant field and laboratory procedures. Examples from high mountain regions show both the potential and limits of employing these methods in dendroclimatological studies. Carbon isotopes yield seasonally resolved information on temperature, precipitation and relative humidity, whilst oxygen isotopes provide information on the isotope values of the source water, and thus, on precipitation. Inter-annual and decadal variations, in particular, reflect a strong common climatic signal that extends across a wide range of site ecologies. However, low frequency trends are masked by a non-climatic, human induced long-term trend, especially where carbon isotopes are concerned. At present, detrending methods are of a provisional nature and set a limit to stable isotopes for paleoclimatic questions. Highly resolved plant physiological and biochemical investigations should provide more insight into these unsolved problems.