通过在中国背景站点夏季和冬季某些日子的 ΔCO 观测，确定日周期化石燃料 CO 和生物 CO。
Determining diurnal fossil fuel CO and biological CO by ΔCO observation on certain summer and winter days at Chinese background sites.
机构信息
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; CAS Center for Excellence in Quaternary Science and Global Change, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China; Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Joint Xi'an AMS Center between IEECAS and Xi'an Jiaotong University, Xi'an, China.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; CAS Center for Excellence in Quaternary Science and Global Change, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China; Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Joint Xi'an AMS Center between IEECAS and Xi'an Jiaotong University, Xi'an, China.
出版信息
Sci Total Environ. 2020 May 20;718:136864. doi: 10.1016/j.scitotenv.2020.136864. Epub 2020 Jan 21.
Diurnal atmospheric ΔCO was measured on two consecutive days in summer and winter, 2016 at Shangdianzi, Lin'an and Luhuitou regional background sites, and at Waliguan global background site in China. The objectives of this study were to determine diurnal fossil fuel CO (CO) and biological CO (CO) concentrations and to ascertain the factors influencing them. Evident CO inputs (0-33.0 ± 1.4 ppm) were found, with some small morning and afternoon rush hour signals. Particularly, the long-range transport of air masses influenced the seasonal differences and rapid diurnal variations in CO. Diurnal CO showed violent variations (-20.9-113.3 ppm), with high values at night and low or negative values during the daytime. Diurnal CO variations resulted from the tradeoffs between photosynthetic CO uptake and biological respiration CO emission as well as atmospheric boundary layer heights variations. These results might help to understand the roles of fossil fuel sources and biological sources on atmospheric CO diurnal variations at Chinese background sites.
2016 年夏季和冬季，分别在临安上田殿、陆家嘴区域背景站和中国瓦里关全球背景站，连续两天测量了大气中二氧化碳的日变化（ΔCO）。本研究的目的是确定大气中化石燃料 CO（CO）和生物源 CO（CO）的日变化浓度，并确定影响它们的因素。结果表明存在明显的 CO 输入（0-33.0±1.4 ppm），且存在早晚高峰时段的小信号。特别是气团的远距离传输影响了 CO 的季节性差异和快速日变化。CO 的日变化幅度较大（-20.9-113.3 ppm），夜间浓度较高，白天浓度较低或为负值。CO 的日变化是光合作用 CO 吸收和生物呼吸 CO 排放以及大气边界层高度变化之间权衡的结果。这些结果有助于理解中国背景站大气 CO 日变化中化石燃料源和生物源的作用。
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