摘要
A short lake sedimentary core and ice core were recovered from Lake Chen Co and Noijingangsang Glacier,respectively,in the Lake Yamdrok watershed of the southern Tibetan Plateau.Hydrogen isotope ratios of the ice core(δDice) and δD values of terrestrial n-alkanes(δDwax) in the sediments showed a linear correlation(R2 = 0.41,P = 0.047) over the past 80 years,indicating the effect of hydrogen isotope ratios of precipitation(δDp) on δDwax.However,apparent fractionation(εwax-p) values of δDwax relative to δDice increased with decreasing ice core accumulation(amount of precipitation;R2 = 0.65,P = 0.0051),revealing that dry or wet climate variation had a significant impact on δDwax.Thus,precipitation amount and δDp are both important in determining δDwax.
A short lake sedimentary core and ice core were recovered from Lake Chen Co and Noijingangsang Glacier, respectively, in the Lake Yamdrok watershed of the southern Tibetan Plateau. Hydrogen isotope ratios of the ice core （δDice） and gD values of terrestrial n-alkanes （δDwax） in the sediments showed a linear correlation （R2 = 0.41, P = 0.047） over the past 80 years, indicating the effect of hydrogen isotope ratios of precipitation （6Dp） on δDwax. However, apparent fractionation （ε-wax-p） values of δDwax relative to δSDice increased with decreasing ice core accumulation （amount of precipitation; R2 = 0.65, P = 0.0051）, revealing that dry or wet climate variation had a significant impact on δDwax. Thus, precipitation amount and δDp are both important in determining
基金
supported by the National Basic Research Program of China (2009CB723901)
the Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-Q09-03 and KZCX2-YW-146)
