High - resolution Environmental Reconstruction and Its Limit: Performance of Pollen Analysis Using Annually Laminated Se diment from Lake Fukami, Nagano Prefecture

从深神湖中回收了12个沉积物岩心。平均每年约有3%的纹层从地核中消失。结果表明，生物化方法能够有效地检测植被的细微变化。采用最佳现代模拟方法进行定量气候重建，能较好地重建秋冬气温，但不能重建降水的细微变化。对20 ~ 30年的泥沙进行分析，效果较好。

12 sediment cores were recovered from Fukami - ike lake. A bout 3% of annual laminae in average were missing from the core. It is revealed that biomization method was powerful enough to detect slight change of vegetation. Quantitative climate reconstruction by best modern analogue method performed well to reconstruct autumn and winter temperature, but it did not reconstruct slight change of precipitation. The performance was better when sediment of 20 - 30 years was analyzed.