Deriving Temporal and Vertical Distributions of Methane in Xianghe Using Ground-based Fourier Transform Infrared and Gas-analyzer Measurements
Deriving Temporal and Vertical Distributions of Methane in Xianghe Using Ground-based Fourier Transform Infrared and Gas-analyzer Measurements
复制标题
利用地面傅里叶变换红外和气体分析仪测量得出香河甲烷的时间和垂直分布
DOI：
10.1007/s00376-020-9233-4
复制
发表时间：
2020
影响因子：
5.8
通讯作者：
Geng
中科院分区：
文献类型：
--
作者：
Denghui Ji;Minqiang Zhou;Pucai C. Wang;Yang Yang;Ting Wang;Xiaoyu Sun;C. Hermans;B. Yao;Geng
甲烷(CH4)是大气中最重要的温室气体之一，因此有必要研究其在源区(如中国北部)的时空分布。为此，地面高分辨率傅里叶变换红外光谱仪Bruker IFS125HR和现场仪器Picarro G2301被部署在河北省香河县(39.8°N，117.0°E)，中国。自2018年6月以来一直有数据记录。对于FTIR测量，我们使用了两种观测模式来提取CH4的摩尔分数：总碳柱观测网络(TCCON)方法(检索算法：GGG2014)和大气组成变化检测网络(NDACC)方法(检索算法：SFIT4)。结合FTIR和现场测量，我们得到了大气CH4在三个垂直层(近地面、对流层和平流层)以及整个大气中的时间和垂直分布。近地面甲烷浓度日变化表现为夜间浓度高于白天。在季节变化方面，三个垂直层的CH4均春季低，夏季高。此外，无论是在对流层还是在整个大气中，冬季在地面附近都有一个CH4的峰值。我们发现对流层柱中CH4的变化与地面附近的现场测量结果接近。此外，平流层柱中CH4的变化受垂直运动的影响，夏季较高，冬季较低。
Methane (CH4) is one of the most important greenhouse gases in the atmosphere, making it worthwhile to study its temporal and vertical distributions in source areas, e.g., North China. For this purpose, a ground-based high-resolution Fourier transform infrared spectrometer (FTIR), the Bruker IFS 125HR, along with an in-situ instrument, the Picarro G2301, were deployed in Xianghe County (39.8°N,117.0°E), Hebei Province, China. Data have been recorded since June 2018. For the FTIR measurements, we used two observation modes to retrieve the mole fraction of CH4: the Total Carbon Column Observing Network (TCCON) method (retrieval algorithm: GGG2014), and the Network for the Detection of Atmospheric Composition Change (NDACC) method (retrieval algorithm: SFIT4). Combining FTIR with in-situ measurements, we found the temporal and vertical distributions of atmospheric CH4within three vertical layers (near the ground, in the troposphere, and in the stratosphere), and throughout the whole atmosphere. Regarding the diurnal variation of CH4near the ground, the concentration at night was higher than during the daytime. Regarding the seasonal variation, CH4was low in spring and high in summer, for all three vertical layers. In addition, there was a peak of CH4in winter near the ground, both in the troposphere and the whole atmosphere. We found that variation of CH4in the tropospheric column was close to that of the in-situ measurements near the ground. Furthermore, the variations of CH4in the stratospheric column could be influenced by vertical motions, since it was higher in summer and lower in winter.
影响因子：
11.4
作者：
Crippa, Monica;Guizzardi, Diego;Janssens-Maenhout, Greet
通讯作者：
Janssens-Maenhout, Greet