Characteristics of CO2 in unsaturated zone(～90 m) of loess tableland, Northwest China

被引：0
|
作者：
Chao Song [1 ,2 ]
Guilin Han [1 ]
Yingchun Shi [2 ]
Congqiang Liu [1 ]
Pan Wang [2 ]
机构：
[1] School of Water Resources and Environment, China University of Geosciences (Beijing)
[2] The Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences
来源：
Acta Geochimica | 2017年 / 36卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Unsaturated zone; Soil CO2; Carbon stock in deep loess; Quantitative paleoclimate reconstruction; Loess;
D O I：
暂无
中图分类号：
P593 [生物地球化学、气体地球化学];
学科分类号：
070902 ;
摘要：
In order to observe CO2characteristics in the unsaturated zone of loess tableland and further understand the carbon cycle,a series of tubes for gas monitoring and sampling were installed in an approximately 90-m deep Qiushe loess section of Lingtai County,Northwestern China.The results show that the concentration of CO2was higher in loess than in the atmosphere,reaching a maximum of 6970 lmol·mol-1.CO2concentrations in loess were higher in summer than in winter.The CO2in loess was related to organic carbon decomposed by microbes,and to the CaCO3–H2O–CO2system in the interface between the saturated and unsaturated zones.
引用
收藏
页码：489 / 493
页数：5
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