干旱区生态环境知识资源中心(Arid): 氢氧同位素测量差异及误差来源分析

Arid

	氢氧同位素测量差异及误差来源分析
其他题名	Study on the consistence between stable hydrogen and oxygen isotopes measured by different equipment and methods
	冉屹立; 熊育久; 赵文利; 王佩; 王蓓; 曹英杰
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2021
卷号	35 期号:1 页码:176-181
中文摘要	水中氢氧稳定同位素(D、~(18)O)是示踪水分过程的重要方法,但不同设备D、~(18)O测量结果一致性有待探索。基于内蒙古乌拉特荒漠草原的同批植被、土壤样本,经抽提获得水样后,分别使用两种同位素仪(LGR和PICARRO)测量氢氧同位素。结果表明:1)LGR测量精度更高;2)D的两组测量结果差异不显著(R~2 = 0.98)、一致性高;3)~(18)O的两组测量结果一致性较差(R~2 = 0.55)、差异显著(ANOVA,P <0.05);4)设备稳定性和水样汽化浓度导致测量误差。
英文摘要	Water isotopes(~(18)O and D)can be used to trace and study the hydrological interaction processes.Currently,it is relatively easy to measure D and ~(18)O through different equipment.However,consistence between the isotopes measured from different equipment remains unclear due to different theories applied in the measurement.The objectives of this study are to evaluate the consistence between water isotopes measured by different equipments and to discuss the possible uncertainties in the measurement.To achieve the objectives,we collected vegetation and soil samples from a desert steppe in Urad Banner,Inner Mongolia in July,2018.After extracting liquid water from the samples,deltaD and delta~(18)O in the water samples were measured and determined respectively by two laser spectroscopes,i.e.,LGR and PICARRO.The findings of this study are as follows:1)There is no significant difference between the two groups of measured D because the scatters were closely distributed along the 1:1 line,with an R~2 of 0.98,indicating a high consistence between the measurements.2)In terms of ~(18)O,the difference between the two measurements was significant(ANOVA,p <0.05)because most of the scatters deviated from the 1:1 line,with an R~2 of 0.55,indicating an inconsistence between the measurements.3)The inconsistence between the measurements was mainly caused by the stability of the isotope equipment and by the vaporized concentration of water samples.
中文关键词	同位素水文 ; 氢氧同位素 ; 光谱测量 ; 干旱区
英文关键词	isotope hydrology hydrogen and oxygen isotopes spectral measurement arid region
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:6924620
来源机构	北京师范大学 ; 北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354294
作者单位	冉屹立, 中山大学地理科学与规划学院, 广州, 广东 510275, 中国. 熊育久, 中山大学土木工程学院, 广州, 广东 510275, 中国. 赵文利, 北京大学深圳研究生院环境与能源学院, 深圳, 广东 518055, 中国. 王蓓, 北京大学深圳研究生院环境与能源学院, 深圳, 广东 518055, 中国. 王佩, 北京师范大学地理科学学部自然资源学院, 北京 100875, 中国. 曹英杰, 中山大学环境科学与工程学院, 广州, 广东 510275, 中国.
推荐引用方式 GB/T 7714	冉屹立,熊育久,赵文利,等. 氢氧同位素测量差异及误差来源分析[J]. 北京师范大学, 北京大学,2021,35(1):176-181.
APA	冉屹立,熊育久,赵文利,王佩,王蓓,&曹英杰.(2021).氢氧同位素测量差异及误差来源分析.干旱区资源与环境,35(1),176-181.
MLA	冉屹立,et al."氢氧同位素测量差异及误差来源分析".干旱区资源与环境 35.1(2021):176-181.