Construction and Application of Phyolithclimate Transfer Function in Peat Surface Deposits of Northeast China
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摘要: 根据泥炭表土植硅体分析和气候气象资料,运用因子分析和逐步回归分析方法建立了东北地区泥炭表土植硅体—气候因子转换函数;并将之用于榆树泥炭剖面的古气候参数重建中,得出近3 000 a来的古气候参数值,并将之暖—冷—暖—冷—暖—冷—暖7个阶段。计算结果同时显示,温暖湿润的气候往往与稳定的气候系统相一致,而且古年均风速的变化可能预示着古气温、古降水变化等将随之发生变化。Abstract: On the basis of phytolith assemblages from peat surface deposits and some climate indexes, a transfer function of phytolithclimate in Northeast China is established by means of factorial analysis and stepwise regression. Using the function, paleoclimate parameters of Yunshu peat profile were calculated and the paleoclimate evolution is then divided into 7 stages: warmcoldwarmclodwarmcoldwarm. The reconstructed curves also show that the changes of paleoannual wind speed might indicate the following changes of paleotemperature and paleo precipitation, and the warm and wet climate always corresponds with a stable climate system.
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Key words:
- Phytolith /
- transfer function /
- peat deposits /
- paleoclimate /
- Northeast China
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