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慕士塔格冰芯记录的近50年来碳质气溶胶含量变化 被引量:2

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摘要 应用热分析方法对慕士塔格冰芯中1955-2000年的碳质气溶胶含量进行了分析,结果显示,冰芯中有机碳(OC)和元素碳(EC)的含量较高,其平均值分别达到61.8和32.9ng·g^-1,并且呈现强的年际变化,其波动范围分别为17.7-216.7和6.5-124.6ng·g^-1。尽管该冰芯平均32.9ng·g^-1的EC含量较同时段的阿尔卑斯冰芯EC记录(100-300ng·g^-1)要低,但却是格陵兰冰芯记录(2-6ng·g^-1,平均2.3ng·g^-1)的14倍,这对该区46a来雪冰反照率有重要的影响。该期间慕士塔格冰芯碳质气溶胶含量经历了2个高值期(1955-1965和1974-1989)和2个低值期(1966-1973和1990-1995),并在近期呈现上升趋势。通过对该冰芯SO^2-4含量的分析及与OC/EC含量的比较,初步断定沉降于该区雪冰中的碳质气溶胶的来源是以化石燃料燃烧排放为主。
出处 《科学通报》 CAS CSCD 北大核心 2008年第19期2358-2364,共7页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:40471022,40525001) 国家重点基础研究发展计划(编号:2005CB422004) 中国科学院“百人计划”(批准号:2004401)资助项目
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