摘要
土壤碳酸盐中碳稳定同位素是记录古气候变化信息的重要载体。本文对吉林省西部大安市姜家甸草场土壤剖面中的δ13C值特征进行了详细分析,并在此基础上推得C3、C4植物生物量;结合野外观察到的剖面特征,作者认为全新世晚期以来,该地区气候曾经历过从干-热～湿-暖～干-热的演变过程。现今吉林西部的干旱化环境正是全新世晚期以来气候持续演化的结果。
Carbon isotope in soil carbonates is an important paleoclimate data carrier. In this paper δ^(13)C values of a soil section in the Jiangjiadian grassland has been analyzed in details. Based on the measurement, the authors calculated the proportion of C3 and C4 plants during the period of section coming into being, and concluded that the climate since Late Holocene epoch in the West of Jilin changed from dry-hot through wet-warm to dry-hot again. The results are well comparable to the characters of the soil section.
出处
《土壤通报》
CAS
CSCD
北大核心
2004年第4期408-412,共5页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(40201052)
国家"973"重点基础研究发展规划项目(G2000048703)资助
