表土长链正构烷烃CPI值的纬向变化:CPI作为气候干旱程度替代指标的证据
查看参考文献72篇
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文摘
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中国东南沿海至黄土高原北缘表土长链正构烷烃CPI值随着纬度增加逐渐升高,CPI值与湿度和降水量分别具有较好的线性负相关关系,而与温度的负相关较弱.武夷山、神农架和天山表土CPI值随着海拔升高(温度降低)没有表现出明显的规律,但从湿润区到干旱区,每座山的平均CPI值依次增大.这些结果表明,表土长链正构烷烃CPI值受控于气候干湿状况,高CPI值可以指示干旱气候.表土长链正构烷烃主要来自植物叶蜡,但表土CPI的这种纬向变化不是植被变化引起的,而很可能是在湿润气候下,微生物活动加强,微生物来源的长链正构烷烃和/或微生物的降解作用导致了表土CPI值降低. |
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来源
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中国科学. 地球科学
,2012,42(11):1729-1741 【核心库】
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关键词
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土壤
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长链正构烷烃
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奇偶优势
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碳优势指数(CPI)
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干旱指标
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地址
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1.
中国石油勘探开发研究院, 提高石油采收率国家重点实验室, 北京, 100083
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中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 510640
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中国科学院地质与地球物理研究所, 中国科学院新生代地质与环境重点实验室, 北京, 100029
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中山大学地球科学系, 广州, 510275
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语种
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中文 |
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ISSN
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1674-7240 |
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学科
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地质学 |
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基金
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国家自然科学基金资助
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:4716611
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