罗布泊红柳沙包沉积纹层有机质碳氮含量与气候变化  

C and N contents in organic matter of Tamarix dune sedimentary veins and environmental change in Lop Nur region

作　　者：赵元杰[1] 李雪峰[1] 夏训诚[2] 王晓毅[1] 

机构地区：[1]河北师范大学资源与环境科学学院,河北省环境演变与生态建设实验室,石家庄050016 [2]中国科学院新疆生态与地理研究所,乌鲁木齐830011

出　　处：《干旱区资源与环境》2011年第4期149-154,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(41071133、40671188);河北省高校重点学科建设项目资助

摘　　要：选取1839～2006年罗布泊地区红柳沙包沉积纹层中红柳落叶TOC、TN、C/N及沙层厚度等环境代用指标进行分析,结果如下:TOC为24.28%～44.55%,TN为0.62%～1.22%,C/N比值为32.53～53.33;TOC与TN呈正相关的线性关系,且较为显著;TOC与C/N相关性很差,线性关系不明显;TN与C/N之间呈高度负相关的线性关系。TOC、TN与温度和降水呈负相关,C/N与温度和降水呈正相关,沙层厚度只与降水呈负相关;研究时段可划分出6个不同的气候阶段:1839～1858年(暖干气候),1859～1910年(冷干气候,进入20世纪出现冷湿气候),1911～1950年(暖湿气候),1951～1962年(冷干气候),1963～2006年(暖湿气候,1978～1982年间温度偏低为冷湿气侯)。By the analysis of TOC,TN,C/N and sandy layer thickness in Tamarix dune sedimentary veins in the period of 1839~2006,the results are as follows： in organic matter the TOC content is 24.28%~44.55%,the TN content is 0.62%~1.22%,C/N is 32.53~53.33;the TOC is significantly related to TN with positive linear,the relation between TOC and C/N is not obvious and their linear relevance is poor,the correlation of TN and C/N is a high negative linear;In Tamarix fallen leaves,the contents of TOC and TN are negative related to temperature and precipitation and the C/N is positive,the thickness of sand layer is negative related to precipitation;In the period the climate could be divided into 6 stages that are 1839~1858（warm and dry climate）,1859~1910（cold and dry climate,cold and wet climate after beginning of 20th century）,1911~1950（warm and wet climate）,1951~1962（cold and dry climate）,and 1963~2006（warm and wet climate,cold moisture climate from 1978 to 1982 with low temperature）.

关 键 词：红柳沙包 有机质 气候变化 罗布泊 

分 类 号：P467[天文地球—大气科学及气象学]