山西省城市大氣CO<sub>2</sub>本底篩分對(duì)比及特征分析

doi:10.12306/2021jms.0078

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山西省城市大氣CO2本底篩分對(duì)比及特征分析
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                        10.12306/2021jms.0078
                    
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中圖分類號(hào):X16,X511
基金項(xiàng)目:國(guó)家氣象局氣候變化項(xiàng)目（CCSF202023）；上甸子國(guó)家大氣背景站開(kāi)放研究項(xiàng)目（SDZ2020617）；山西省一般項(xiàng)目（SXKMSDW20205215）

Comparison and characteristic analysis of background filtering methods for urban atmospheric CO₂ in Shanxi

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基于典型城市站太原站2018年3月—2019年2月的大氣CO₂在線觀測(cè)資料，利用篩分法（Meteorological filtering method，MET）和黑碳示蹤法（Black Carbon tracer，BC）進(jìn)行本底/非本底的篩分，得到了本底濃度的變化特征。結(jié)果表明，太原大氣CO₂濃度季均值冬季最高，夏季最低；不同季節(jié)呈"單峰型"日變化特征，日振幅均在26.0×10^-6以上；4個(gè)季節(jié)CO₂濃度與地面風(fēng)速存在顯著負(fù)相關(guān)關(guān)系；CO₂濃度抬升區(qū)域主要受當(dāng)?shù)毓I(yè)布局的影響，最大抬升幅度在秋季達(dá)17.4×10^-6；使用氣象篩分法（MET）得到年均本底濃度為（431.4±19.9）×10^-6，人為排放等對(duì)其影響為23.5×10^-6，年振幅比同緯度其它本底站大，為34.5×10^-6；黑碳示蹤法（BC）得到冬季季均本底濃度為（445.0±22.9）×10^-6，比MET篩分法得到的季均值高0.8×10^-6，兩種篩分法得到的CO₂濃度變化趨勢(shì)一致。

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This paper analyzed the on-line observation data of atmospheric CO₂ at Taiyuan station, where a typical urban station, from March 2018 to February 2019. Meteorological filtering method (MET) method and Black Carbon tracer method (BC) method were used to obtain background concentration and non-background concentration. The variation characteristics of background concentration were studied. Results show that the seasonal average value of atmospheric CO₂ concentration in Taiyuan is the highest in winter and the lowest in summer; the four seasons diurnal variations have "single peak", with daily amplitude above 26.0×10^-6; the four seasons have significant negative correlation between CO₂ concentration and surface wind speed; the rising area of CO₂ concentration is mainly affected by the local industrial layout, and the maximum uplift amplitude can reach 17.4×10^-6 in autumn. The average annual background concentration filtered by MET is (431.4 ±19.9)×10^-6, the influence of anthropogenic emissions is 23.5×10^-6, and the annual amplitude is 34.5×10^-6, which is larger than other background stations at the same latitude. The average background concentration filtered by BC is (445.0 ±22.9)×10^-6, which is 0.8×10^-6 higher than that filtered by MET, the variation trend of CO₂ concentration obtained by the two filtering methods is the same.

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王淑敏,張逢生,賀潔穎,朱凌云,高興艾,裴坤寧.山西省城市大氣CO₂本底篩分對(duì)比及特征分析.氣象科學(xué),2023,43(5):680-688 WANG Shumin, ZHANG Fengsheng, HE Jieying, ZHU Lingyun, GAO Xing'ai, PEI Kunning. Comparison and characteristic analysis of background filtering methods for urban atmospheric CO₂ in Shanxi. Journal of the Meteorological Sciences,2023,43(5):680-688

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收稿日期:2021-06-09
最后修改日期:2021-09-07
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在線發(fā)布日期: 2024-01-23
出版日期: 2023-10-15

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