Records of natural fire and climate history during the last three glacial-interglacial cycles around

• 作 者: 罗运利rrrrrrrrrn 陈怀成rrrrrrrrrn 吴国瑄rrrrrrrrrn 孙湘君
• 出 处: Science in China(Series D:Earth Sciences)
• 发表日期: 2001年10期
• 关键词: glacial record continental pollen coarse grains Isotope abundant shelf Marine

The history of natural fire and its relationship to climate during the last three gla-cial-interglacial cycles in the Southern coast areas of China and the northern continental shelf of the South China Sea (SCS) are discussed based on the statistic study of charcoal particles and associated pollen data from ODP 1144 Site (20°3’N, 117°25’E, 2037m in water depth). According to the results of the charcoal and pollen study, the sediments from the upper 225 m are divided into 8 zones (C1-C8), which might be correlated with the Marine Isotope Stage 1-8 (MIS1-8) respectively. Our study indicates that during the last glacial period (MIS2, 4), the influx of charcoal particle was much higher than that from the interglacial period, suggesting strong occurrence of natural fire and dry climate. During MIS 6 and MIS 8 (C6, C8), although the influx of fine charcoal particles was quite high, the influx of the coarse and medium charcoal particle were much low, which might be due to the smaller source area of fire proba

The history of natural fire and its relationship to climate during the last three gla-cial-interglacial cycles in the Southern coast areas of China and the northern continental shelf of the South China Sea (SCS) are discussed based on the statistic study of charcoal particles and associated pollen data from ODP 1144 Site (20 ° 3’N, 117 ° 25’E, 2037m in water depth). According to the results of the charcoal and pollen study, the sediments from the upper 225 m are divided into 8 zones (C1-C8), which might be correlated with the Marine Isotope Stage 1-8 (MIS1-8) respectively. Our study indicates that during the last glacial period (MIS2, 4), the influx of charcoal particle was much higher than that During the interglacial period, suggesting a strong occurrence of natural fire and dry climate. During MIS 6 and MIS 8 (C6, C8), although the influx of fine charcoal particles was quite high, the influx of the coarse and medium charcoal particles were much low , which might be due to the smaller source area of ​​fire proba