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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Emission estimates of HCFCs and HFCs in California from the 2010 CalNex study
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Emission estimates of HCFCs and HFCs in California from the 2010 CalNex study

机译：根据2010 CalNex研究报告，加州的HCFC和HFC排放估算

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The CalNex 2010 (California Research at the Nexus of Air Quality and Climate Change) study was designed to evaluate the chemical composition of air masses over key source regions in California. During May to June 2010, air samples were collected on board a National Oceanic and Atmospheric Administration (NOAA) WP-3D aircraft over the South Coast Air Basin of California (SoCAB) and the Central Valley (CV). This paper analyzes six effective greenhouse gases - chlorodifluoromethane (HCFC-22), 1,1-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane (HCFC-142b), 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 1,1,1,2- tetrafluoroethane (HFC-134a), and 1,1-difluoroethane (HFC-152a) - providing the most comprehensive characterization of chlorofluorocarbon (CFC) replacement compound emissions in California. Concentrations of measured HCFCs and HFCs are enhanced greatly throughout the SoCAB and CV, with highest levels observed in the SoCAB: 310 ~± 92 pptv for HCFC-22, 30.7 ~± 18.6 pptv for HCFC-141b, 22.9 ~± 2.0 pptv for HCFC-142b, 4.86 ~± 2.56 pptv for HCFC-124, 109 ~± 46.4 pptv for HFC-134a, and 91.2 ~± 63.9 pptv for HFC-152a. Annual emission rates are estimated for all six compounds in the SoCAB using the measured halocarbon to carbon monoxide (CO) mixing ratios and CO emissions inventories. Emission rates of 3.05 ~± 0.70 Gg for HCFC-22, 0.27 ~± 0.07 Gg for HCFC-141b, 0.06 ~± 0.01 Gg for HCFC-142b, 0.11 ~± 0.03 Gg for HCFC-124, 1.89 ~± 0.43 Gg for HFC-134a, and 1.94 ~± 0.45 Gg for HFC-152b for the year 2010 are calculated for the SoCAB. These emissions are extrapolated from the SoCAB region to the state of California using population data. Results from this study provide a baseline emission rate that will help future studies determine if HCFC and HFC mitigation strategies are successful. Key PointsHCFC and HFC emissions are calculated for the year 2010 for the SoCABEmissions are extrapolated to the state of CaliforniaEmissions are calculated using CalNex field measurements
机译：CalNex 2010（空气质量与气候变化联系加州研究）的研究旨在评估加利福尼亚主要污染源地区的空气化学成分。在2010年5月至6月期间，美国国家海洋和大气管理局（NOAA）WP-3D飞机在加利福尼亚州南海岸空气盆地（SoCAB）和中央山谷（CV）上采集了空气样本。本文分析了六种有效的温室气体-氯二氟甲烷（HCFC-22），1,1-二氯-1-氟乙烷（HCFC-141b），1-氯-1,1-二氟乙烷（HCFC-142b），2-氯-1 ，1,1,2-四氟乙烷（HCFC-124），1,1,1,2-四氟乙烷（HFC-134a）和1,1-二氟乙烷（HFC-152a）-提供了最全面的氯氟烃（CFC）表征）在加利福尼亚州替代化合物的排放。在整个SoCAB和CV中，所测量的HCFC和HFC的浓度大大提高，在SoCAB中观察到最高水平：HCFC-22为310〜±92 pptv，HCFC-141b为30.7〜±18.6 pptv，HCFC为22.9〜±2.0 pptv -142b，HCFC-124为4.86〜±2.56 pptv，HFC-134a为109〜±46.4 pptv，HFC-152a为91.2〜±63.9 pptv。使用测得的卤代烃与一氧化碳（CO）的混合比和CO排放清单估算SoCAB中所有六种化合物的年排放率。 HCFC-22的发射率是3.05〜±0.70 Gg，HCFC-141b的发射率是0.27〜±0.07 Gg，HCFC-142b的发射率是0.06〜±0.01 Gg，HCFC-124的发射率是0.11〜±0.03 Gg，HFC的是1.89〜±0.43 Gg对于SoCAB，2010年的HFC-152b为-134a和1.94〜±0.45 Gg。使用人口数据将这些排放量从SoCAB地区推断到加利福尼亚州。这项研究的结果提供了基准排放率，这将有助于未来的研究确定HCFC和HFC缓解战略是否成功。要点2010年针对SoCABE的HCFC和HFC排放量进行了计算推断到加利福尼亚州的排放量使用CalNex现场测量结果进行计算

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