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地球学报  2008 

天目山泥炭有机碳同位素特征及其古环境意义

DOI: 10.3975/cagsb.2008.06.19

Keywords: 有机碳同位素,气候演化,植被演替,泥炭

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Abstract:

通过对浙江天目山泥炭剖面的高密度采样和有机碳同位素分析,重建了该地区4kaBP以来的古植被特征和古环境演化历史.天目山3200aBP之前,气候温和适度,晚期变冷变干,为中全新世末气候波动的过渡时期.3200~700aBP,有机碳δ13Corg值在波动中降低,气候出现多次急剧冷暖变化,指示了几次温暖与寒冷事件.700aBP以来,有机碳同位素迅速正偏,表明又一暖期的出现,到了后期气温又有所降低,植被转化为草原草甸景观.天目山地区近4ka以来的气候变化与国内外不同区域的研究资料相一致,但又有区域的差异性.

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