Atmospheric sulfur hexafluoride in-situ measurements at the Shangdianzi regional background station in China

Yao, Bo; Li-hua, Zhou; Xia, Lingjun; Zhang, Gen; Guo, Lifeng; Liu, Zhao; Fang, Shuangxi

doi:10.1016/j.jes.2014.03.004

Cited by 6 publications

(2 citation statements)

References 23 publications

(20 reference statements)

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“…For example, the contributions of aggregated CO 2 -equiv emissions of the nine most abundant HFCs from China to the global total CO 2 -equiv emissions increased rapidly from 2.6 to 15% during 2005–2016 . Studies have been carried out to continuously observe the mole fractions of halogenated gases at both background stations ,− and urban sites − in China. However, a few studies have reported high-precision mole fractions covering a comprehensive range of halogenated gases including NF 3 .…”

Section: Introductionmentioning

confidence: 99%

In Situ Observations of Halogenated Gases at the Shangdianzi Background Station and Emission Estimates for Northern China

Yu³

et al. 2023

Environ. Sci. Technol.

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Halogenated gases include ozone-depleting substances and greenhouse gases, such as chlorofluorocarbons, halons, hydrochlorofluorocarbons, hydrofluorocarbons, and perfluorinated gases. In situ atmospheric observations of major halogenated gases were conducted at the Shangdianzi (SDZ) background station, China, from October 2020 to September 2021 using ODS5-pro, a newly developed measurement system. The measurement time series of 36 halogenated gases showed occasional pollution events, where background conditions represented 25% (CH2Cl2) to 81% (CF3Cl, CFC-13) of the measurements. The annual mean background mole fractions of most species at SDZ were consistent with those obtained at the Mace Head station in Ireland. The background conditions were distinguished from pollution events, and the enhanced mole fractions were used to estimate the emissions of four categories of fluorinated gases (F-gases) from northern China using a tracer ratio method. The CO2-equivalent (CO2-equiv) emission of F-gases from northern China reached 181 ± 18 Tg year–1 during 2020–2021. Among the four categories of F-gases estimated, SF6 accounted for the highest proportion of CO2-equiv emissions (24%), followed by HFC-23 (22%), HFC-125 (17%), HFC-134a (13%), NF3 (10%), CF4 (5.9%), HFC-143a (3.9%), HFC-32 (3.4%), and HFC-152a (0.2%).

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Section: Introductionmentioning

confidence: 99%

In Situ Observations of Halogenated Gases at the Shangdianzi Background Station and Emission Estimates for Northern China

Yu³

et al. 2023

Environ. Sci. Technol.

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“…Both in-situ measurement by the GC-ECD system and the canister sampling measurements were conducted at the SDZ station. The precision of the in-situ measurements for the GC-ECD is estimated by the standard deviation of a measured target tank (working standards analyzed with the same procedure as ambient samples) (Yao et al, 2014). The precision of the GC-ECD system was 0.7%, this was determined by analyzing the target tanks 57 times.…”

Section: Comparison Between In-situ and Weekly Sampling Measurementsmentioning

confidence: 99%

Atmospheric CH3CCl3 observations in China: Historical trends and implications

Yao

Lin

et al. 2020

Atmospheric Research

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Ambient mixing ratios of atmospheric halogenated compounds at five background stations in China

Zhang

Yao

Vollmer

et al. 2017

Atmospheric Environment

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Atmospheric sulfur hexafluoride in-situ measurements at the Shangdianzi regional background station in China

Cited by 6 publications

References 23 publications

In Situ Observations of Halogenated Gases at the Shangdianzi Background Station and Emission Estimates for Northern China

In Situ Observations of Halogenated Gases at the Shangdianzi Background Station and Emission Estimates for Northern China

Atmospheric CH3CCl3 observations in China: Historical trends and implications

Ambient mixing ratios of atmospheric halogenated compounds at five background stations in China

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