东南极Caroline冰岩芯气候学研究

本文综合研究了东南极冰盖边缘Caroline冰岩芯中以氢同位素、微粒含量、冰晶及气泡含量为参数的古气候信息。在Caroline冰岩芯中,末次冰盛期以来的记录完好。冰盛期特征是低氢同位素、高微粒含量、高气泡含量和细粒冰晶。本研究证明,在冰盖边缘冰中仍可能保留着连续的气候变化信息。     

提高原子吸收光谱仪测定冰雪样品的灵敏度

冰雪样品离子含量低,用原子吸收光谱测定阳离子,有些离子不能得到满意的结果,改用撞击球替代绕流器雾化,通过一系列试验对比,结果Ｃａ＾＋吸光度提高１．２倍,解决了冰雷样品离子含量低,测定难的问题。     

The Climatic Fluctuation and Important Events of Holocene Megathermal in China

Data from various sources including the ice core, inland lakes , paleosols in loess and eolian sands, sea level fluctuations, paleozoological, archeological evidences especially palynology and bontanical studies of China are reviewed . Holocene Megathermal mainly appeared during 8. 5-3 ka BP and lasted for 5. 5 ka. There were several strong climatic fluctuations and cooling events during this period, e. g. it was an unstable temperature fluctuation phase during 8. 5-7. 2 ka BP and was accompanied with the increase of the precipitation as well as the northward and westward migration of the vegetation zone ; the rapid development of Neolithic Culture happened in this phase. It was a stable warm and wet phase from 7. 2 to 6 ka BP, i. e. Megathermal Maximum, when monsoon was rainfall almost throughout China, plants were unprecedentedly flourished, and the Yangshao Culture reached its climax. It is characterized by strong climatic fluctuation and adverse environment during 6-5 ka BP and the impact of strong     

南极冰盖边缘-冰岩芯微粒分析及气候意义

本文使用微粒计数器(Couiter Counter)和光扫描计数(Optic Counting)分析了南极冰盖边缘冰岩芯的微粒含量。分析结果表明,不同地区的微粒含量是不同的,特别是从南极冰盖边缘到内陆。经与其他冰岩芯微粒含量的比较,本文认为,末次冰期气候最冷期和最高微粒含量出现期之间有一滞后。滞后的原因是因为微粒含量峰值的出现同其它大陆最干燥期的出现同步。