主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2022, Vol. 38 ›› Issue (2): 70-77.doi: 10.3969/j.issn.1673-503X.2022.02.009

• 论文 • 上一篇    下一篇

基于飞机观测资料的石家庄秋季对流层CH4垂直分布特征

麦榕1(),杨洋1,2,*(),范根昌1,吕峰1,董晓波1,2,梁苗3,姚波3   

  1. 1. 河北省人工影响天气办公室, 河北 石家庄 051430
    2. 河北省气象与生态环境重点实验室, 河北 石家庄 050021
    3. 中国气象局气象探测中心, 北京 100081
  • 收稿日期:2021-01-05 出版日期:2022-04-28 发布日期:2022-04-24
  • 通讯作者: 杨洋 E-mail:mairong91@163.com;yangyang@hebwmo.cn
  • 作者简介:麦榕, 女, 1991年生, 助理工程师, 主要从事大气物理与大气环境方面的研究, E-mail: mairong91@163.com
  • 基金资助:
    科技部国家重点研发计划(2017YFB0504000);国家自然科学基金(41730103)

Characteristics of the vertical distribution of CH4 in the troposphere in autumn in Shijiazhuang based on aircraft observations

Rong MAI1(),Yang YANG1,2,*(),Gen-chang FAN1,Feng LV1,Xiao-bo DONG1,2,Miao LIANG3,Bo YAO3   

  1. 1. Hebei Weather Modification Office, Shijiazhuang 051430, China
    2. Key Laboratory of Meteorology and Ecological Environment of Hebei Province, Shijiazhuang 050021, China
    3. Meteorological Observation Center of China Meteorological Administration (MOC/CMA), Beijing 100081, China
  • Received:2021-01-05 Online:2022-04-28 Published:2022-04-24
  • Contact: Yang YANG E-mail:mairong91@163.com;yangyang@hebwmo.cn

摘要:

为研究石家庄秋季对流层内CH4垂直分布特征,2018年9月使用“空中国王350”飞机搭载Picarro温室气体在线观测仪和气象要素观测设备,对石家庄上空(600—5500 m)CH4浓度进行探测。探测期间共飞行7架次,取得7条CH4浓度廓线数据。结果表明: 石家庄上空近地面层(1000 m以下)CH4平均浓度与同时间段区域背景站上甸子站CH4浓度呈显著正相关(r=0.81,P < 0.03)。探测到的CH4浓度最小值为1898×10-9摩尔分数,最大值为2219×10-9摩尔分数,平均浓度为1981×10-9摩尔分数。观测得到的7条廓线均有较好的一致性,2000 m以上,浓度均随高度呈先增大后减小的趋势。利用后向轨迹模式(HYSPLIT)对探测时段内石家庄上空不同高度层主要气流传输路径进行统计分析表明,600 m高度输送路径较短,CH4浓度受本地排放影响较大; 3000 m受输送作用影响较大,偏西和西南路径可能将较高CH4浓度气团输送至石家庄上空; 5000 m气团传输对CH4浓度影响较小,浓度相对较稳定,对传输路径的变化不敏感。

关键词: CH4浓度, 垂直分布, 飞机探测, 后向轨迹

Abstract:

To study the vertical distribution characteristics of CH4 within the troposphere in autumn in Shijiazhuang, the King Air 350 aircraft with Picarro greenhouse gas online observer and meteorological observation equipment were used to detect CH4 concentrations over Shijiazhuang (600-5500 m) in September, 2018.A total of seven flights were made during the survey period, and seven CH4 concentration profiles were obtained.The results show that the average concentration of CH4 near the surface layer (below 1000 m) over Shijiazhuang is positively correlated with that at Shangdianzi station during the same period (r=0.81, P < 0.03).During the detection period, the minimum CH4 concentration of the seven profiles is 1898×10-9, the maximum is 2219×10-9, and the average concentration is 1981×10-9.The seven profiles obtained by observations are all consistent.The concentration above 2000 m increases first and then decreases with height.The backward trajectory mode-HYSPLIT model is used to analyze the main air transport paths at different altitudes over Shijiazhuang during the detection period.The transport pathways at 600 m are shorter, and the concentration of CH4 is greatly influenced by local emissions.At 3000 m, the air mass with higher CH4 concentration may be transported over Shijiazhuang by the west-southwest path.The air mass transport at 5000 m has little influence on CH4 concentration.The CH4 concentration at this level is relatively stable and insensitive to the change of transport path.

Key words: CH4 concentration, Vertical distribution, Aircraft observation, Backward trajectory

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