文章目录

Introduction

1 Measurement principle

2 Detection system for composite non-point sources emissions

3 Detection method and verification of eliminating gas fluctuation

4 Experimental verification

4.1 Verification experiment of the measurement method

4.2 Comparative experiment

4.3 Methane monitoring experiment in Fengqiu Ecological Station

5 Conclusions

文章摘要:在面源气体排放的测量过程中,不可避免地受到相邻田地气体排放干扰,又受到环境扰动的影响,影响气体检测的准确性。为了提高测量精度,研究了基于激光光谱检测的复合面源甲烷非均匀排放测量方法。通过多次自标定测量,减少了外部环境的干扰。设计了非均匀面源排放物检测系统,并提出了消除气体波动检测方法。首先进行了准确性验证试验,待测源a的标准差为0.17,待测源b的标准差为0.18;随后与光声光谱抽取式进行了对比试验,相关系数达到0.91;最后开展了外场实际的测量应用,对不同施肥方式造成的两个不均匀排放待测源进行监测,实现对多源不均匀排放的准确测量。它具有农业气体排放,环境气体检测等实用工程价值。

文章关键词:激光吸收光谱,准确测量,非均匀,复合面源,

项目基金:Supported by the National Natural Science Foundation of China(41805124),Anhui Natural Science (1808085MD107),Chinese Academy of Sciences Scientific Research Instrument and Equipment Development Project(YJKYYQ20190051)； Key Research and Development Plan of Anhui Province(201904a07020093)； 文章来源：《大气与环境光学学报》 网址: http://www.dqyhjgxxb.cn/qikandaodu/2021/0818/538.html