Articles | Volume 20, issue 24
https://doi.org/10.5194/acp-20-15969-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-15969-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report
| 
22 Dec 2020
Measurement report |
| 22 Dec 2020
| 22 Dec 2020
Measurement report: Long-term variations in carbon monoxide at a background station in China's Yangtze River Delta region
Yijing Chen
College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
School of Environment, Tsinghua University, Beijing 100084, China
Qianli Ma
Lin'an Atmosphere Background National Observation and Research
Station, Lin'an 311307, Hangzhou, China
College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
Xiaobin Xu
Key Laboratory for Atmospheric Chemistry, Chinese Academy of
Meteorological Sciences, Beijing 100081, China
Jie Yao
Lin'an Atmosphere Background National Observation and Research
Station, Lin'an 311307, Hangzhou, China
Wei Gao
Shanghai Key Laboratory of Meteorology and Health, Shanghai
Meteorological Service, Shanghai 200030, China
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Significant decreases in annual mean NOx from 2011 to 2016 and SO2 from 2008 to 2016 confirm the effectiveness of relevant control measures on the reduction in NOx and SO2 emissions in the North China Plain (NCP). NOx at SDZ had a weaker influence than SO2 on the emission reduction in Beijing and other areas in the NCP. An increase in the number of motor vehicles and weak traffic restrictions have caused vehicle emissions of NOx, which indicates that NOx emission control should be strengthened.
Qingqing Yin, Qianli Ma, Weili Lin, Xiaobin Xu, and Jie Yao
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China has been experiencing rapid changes in emissions of air pollutants in recent decades. NOx and SO2 measurements from 2006 to 2016 at the Lin’an World Meteorological Organization Global Atmospheric Watch station were used to characterize the seasonal and diurnal variations and study the long-term trends. This study reaffirms China’s success in controlling both NOx and SO2 in the Yangtze River Delta but indicates at the same time a necessity to strengthen the NOx emission control.
Tongqiang Liu, Qianshan He, Yonghang Chen, Jie Liu, Qiong Liu, Wei Gao, Guan Huang, Wenhao Shi, and Xiaohong Yu
Atmos. Chem. Phys., 21, 5377–5391, https://doi.org/10.5194/acp-21-5377-2021, https://doi.org/10.5194/acp-21-5377-2021, 2021
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The variation in aerosol 355 nm lidar ratio and its influence factors were analyzed in Shanghai. About 90 % of the lidar ratio was distributed in 10 sr–80 sr, with an average of 41.0±22.5 sr, and the lidar ratio decreased with the increase in height. Due to aerosol radiative effects, the vertical slope of the lidar ratio presented a decreasing trend with increasing atmospheric turbidity. A large lidar ratio above 1 km was related to biomass burning aerosols and high relative humidity.
Ziru Lan, Weili Lin, Weiwei Pu, and Zhiqiang Ma
Atmos. Chem. Phys., 21, 4561–4573, https://doi.org/10.5194/acp-21-4561-2021, https://doi.org/10.5194/acp-21-4561-2021, 2021
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Haze related to particulate matter has become a big problem in eastern China, and ammonia (NH3) plays an important role in secondary particulate matter formation. In this work, variations in the NH3 mixing ratio showed that the contributions of NH3 sources and sinks in urban and suburban areas were quite different, although the areas were under the influence of similar weather systems. This study furthers the understanding of the behavior of NH3 in a megacity environment.
Weili Lin, Feng Wang, Chunxiang Ye, and Tong Zhu
The Cryosphere Discuss., https://doi.org/10.5194/tc-2021-32, https://doi.org/10.5194/tc-2021-32, 2021
Preprint withdrawn
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Field observations found that released NOx on the glacier surface of the Tibetan Plateau, an important snow-covered region in the northern mid-latitudes, had a higher concentration than in Antarctic and Arctic regions. Such evidence, and such high fluxes as observed here on the Tibetan plateau is novel. That such high concentrations of nitrogen oxides can be found in remote areas is interesting and important for the oxidative budget of the boundary layer.
Yixuan Gu, Fengxia Yan, Jianming Xu, Yuanhao Qu, Wei Gao, Fangfang He, and Hong Liao
Atmos. Chem. Phys., 20, 14361–14375, https://doi.org/10.5194/acp-20-14361-2020, https://doi.org/10.5194/acp-20-14361-2020, 2020
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High levels and statistically insignificant changes of ozone are detected at a remote monitoring site on Sheshan Island in Shanghai, China, from 2012 to 2017; 6-year observations suggest regional transport exerted minimum influence on the offshore oceanic air in September and October. Both city plumes and oceanic air inflows could contribute to ozone enhancements in Shanghai, and the latter are found to lead to 20–30 % increases in urban ozone concentrations based on WRF-Chem simulations.
Cited articles
Ahmed, E., Kim, K. H., Jeon, E. C., and Brown, R. J. C.: Long term trends of
methane, non methane hydrocarbons, and carbon monoxide in urban atmosphere,
Sci. Total Environ., 518, 595–604,
https://doi.org/10.1016/j.scitotenv.2015.02.058, 2015.
Andreae, M. O. and Merlet, P.: Emission of trace gases and aerosols from
biomass burning, Global Biogeochem. Cy., 15, 955–966,
https://doi.org/10.1029/2000GB001382, 2001.
Bakwin, P. S., Tans, P. P., and Novelli, P. C.: Carbon monoxide budget in
the northern hemisphere, Geophys. Res. Lett., 21, 433–436,
https://doi.org/10.1029/94GL00006, 1994.
Cohen, Y., Petetin, H., Thouret, V., Marécal, V., Josse, B., Clark, H., Sauvage, B., Fontaine, A., Athier, G., Blot, R., Boulanger, D., Cousin, J.-M., and Nédélec, P.: Climatology and long-term evolution of ozone and carbon monoxide in the upper troposphere–lower stratosphere (UTLS) at northern midlatitudes, as seen by IAGOS from 1995 to 2013, Atmos. Chem. Phys., 18, 5415–5453, https://doi.org/10.5194/acp-18-5415-2018, 2018.
Crutzen, P. J., Heidt, L. E., Krasnec, J. P., Pollock, W. H., and Seiler,
W.: Biomass burning as a source of atmospheric gases CO, H2, N2O,
NO, CH3Cl and COS, Nature, 282, 253–256,
https://doi.org/10.1038/282253a0, 1979.
Daniel, J. S. and Solomon, S.: On the climate forcing of carbon monoxide,
J. Geophys. Res.-Atmos., 103, 13249–13260,
https://doi.org/10.1029/98JD00822, 1998.
Deeter, M. N., Edwards, D. P., Francis, G. L., Gille, J. C., Martínez-Alonso, S., Worden, H. M., and Sweeney, C.: A climate-scale satellite record for carbon monoxide: the MOPITT Version 7 product, Atmos. Meas. Tech., 10, 2533–2555, https://doi.org/10.5194/amt-10-2533-2017, 2017.
Demerjian, K. L., Kerr, J. A., and Calvert, J. G.: The Predicted Effect of
Carbon Monoxide on the Ozone Levels in Photochemical Smog Systems,
Environ. Lett., 3, 73–80, https://doi.org/10.1080/00139307209435456,
1972.
Di Carlo, P., Brune, W. H., Martinez, M., Harder, H., Lesher, R., Ren, X.,
Thornberry, T., Carroll, M. A., Young, V., Shepson, P. B., Riemer, D., Apel,
E., and Campbell, C.: Missing OH Reactivity in a Forest: Evidence for
Unknown Reactive Biogenic VOCs, Science, 304, 722–725,
https://doi.org/10.1126/science.1094392, 2004.
Fang, S., Zhou, L., Luan, T., Ma, Q., and Wang, H.: Distribution of CO at
Lin'an Station in Zhejiang Province, Environm. Sci., 35,
2454–2459, 2014.
Gao, W., Tie, X., Xu, J., Huang, R., Mao, X., Zhou, G., and Chang, L.:
Long-term trend of O3 in a mega City (Shanghai), China: Characteristics,
causes, and interactions with precursors, Sci. Total Environ.,
603–604, 425–433,
https://doi.org/10.1016/j.scitotenv.2017.06.099, 2017.
Global Atmosphere Watch Programme/The World Data Centre for Greenhouse
Gases (WDCGG): CO concentrations at the regional atmospheric background stations, available at: https://gaw.kishou.go.jp/, last access: 1 October 2020.
Hao, N., Valks, P., Loyola, D., Cheng, Y. F., and Zimmer, W.: Space-based
measurements of air quality during the World Expo 2010 in Shanghai,
Environ. Res. Lett., 6, 044004,
https://doi.org/10.1088/1748-9326/6/4/044004, 2011.
Holloway, T., Levy II, H., and Kasibhatla, P.: Global distribution of carbon
monoxide, J. Geophys. Res.-Atmos., 105, 12123–12147,
https://doi.org/10.1029/1999JD901173, 2000.
Huang, X., Wang, T., Zhuang, B., Li, S., Xie, M., Han,Y., Yang, X., Sun, J., Ding, A., and Fu, Z.: Observation and analysis of urban upper atmospheric carbon monoxide in Nanjing, China Environmental Science, 33, 1577–1584, 2013a.
Huang, Y., Wei, H., Duan, Y., and Zhang, Y.: Ambient Air Quality Status and Reason Analysis of Shanghai World Expo, Environmental Monitoring in China, 29, 5–63, https://doi.org/10.19316/j.issn.1002-6002.2013.05.012, 2013b.
Ingham, T., Goddard, A., Whalley, L. K., Furneaux, K. L., Edwards, P. M., Seal, C. P., Self, D. E., Johnson, G. P., Read, K. A., Lee, J. D., and Heard, D. E.: A flow-tube based laser-induced fluorescence instrument to measure OH reactivity in the troposphere, Atmos. Meas. Tech., 2, 465–477, https://doi.org/10.5194/amt-2-465-2009, 2009.
Khalil, M. A. K. and Rasmussen, R. A.: The global cycle of carbon monoxide:
Trends and mass balance, Chemosphere, 20, 227–242,
https://doi.org/10.1016/0045-6535(90)90098-E, 1990.
Kovacs, T. and Brune, W.: Total OH Loss Rate Measurement, J. Atmos. Chem., 39, 105–122, https://doi.org/10.1023/A:1010614113786,
2001.
Lei, Y., Zhang, Q., Nielsen, C., and He, K.: An inventory of primary air
pollutants and CO2 emissions from cement production in China, 1990–2020,
Atmos. Environ., 45, 147–154,
https://doi.org/10.1016/j.atmosenv.2010.09.034, 2011.
Li, M., Zhang, Q., Kurokawa, J.-I., Woo, J.-H., He, K., Lu, Z., Ohara, T., Song, Y., Streets, D. G., Carmichael, G. R., Cheng, Y., Hong, C., Huo, H., Jiang, X., Kang, S., Liu, F., Su, H., and Zheng, B.: MIX: a mosaic Asian anthropogenic emission inventory under the international collaboration framework of the MICS-Asia and HTAP, Atmos. Chem. Phys., 17, 935–963, https://doi.org/10.5194/acp-17-935-2017, 2017 (data available at: http://meicmodel.org/dataset-mix.html, last access: 1 October 2020).
Lin, H., Wang, Y., Hu, B., Zhu, R., and Wang, Y.: Observation and research
on carbon monoxide in the atmosphere of Beijing during the summertime of
2007, Environmental Chemistry, 28, 567–570, 2009.
Lin, W., Xu, X., Yu, D., Dai, X., Zhang, Z., Meng, Z., and Wang, Y.: Quality
Control for Reactive Gases Observation at Longfengshan Regional Atmospheric
Background Monitoring Station, Meteorological Monthly, 35, 93–100, 2009.
Lin, W., Xu, X., and Zhang, X.: The errors in the claimed concentrations of
standard gases used in the observation of reactive gases and recommended
solutions, Environ. Chem., 30, 1–4, 2011a.
Lin, W., Xu, X., Sun, J., Liu, X., and Wang, Y.: Study of the background
concentrations of reactive gases at Jinsha regional atmospheric background
station and the impacts of long-range transport, Sci. China Earth Sci., 54,
1604–1613, https://doi.org/10.3724/SP.J.1146.2006.01085, 2011b.
Liu, S., Fang, S., Liang, M., Sun, W., and Feng, Z.: Temporal patterns and
source regions of atmospheric carbon monoxide at two background stations in
China, Atmos. Res., 220, 169–180,
https://doi.org/10.1016/j.atmosres.2019.01.017, 2019.
Lou, S., Holland, F., Rohrer, F., Lu, K., Bohn, B., Brauers, T., Chang, C. C., Fuchs, H., Häseler, R., Kita, K., Kondo, Y., Li, X., Shao, M., Zeng, L., Wahner, A., Zhang, Y., Wang, W., and Hofzumahaus, A.: Atmospheric OH reactivities in the Pearl River Delta – China in summer 2006: measurement and model results, Atmos. Chem. Phys., 10, 11243–11260, https://doi.org/10.5194/acp-10-11243-2010, 2010.
Meng, Z. Y., Xu, X. B., Yan, P., Ding, G. A., Tang, J., Lin, W. L., Xu, X. D., and Wang, S. F.: Characteristics of trace gaseous pollutants at a regional background station in Northern China, Atmos. Chem. Phys., 9, 927–936, https://doi.org/10.5194/acp-9-927-2009, 2009.
MOPITT Algorithm Development Team: MOPITT (Measurements of Pollution in the Troposphere) Version 8 Product User's Guide, available at: http://www.satdatafresh.com/CO_MOPITT.html (last access: 1 October 2020), 2018.
Novelli, P., Steele, L., and Tans, P.: Mixing Ratios of Carbon Monoxide in
the Troposphere, J. Geophys. Res., 97, 20731–20750,
https://doi.org/10.1029/92JD02010, 1992.
Novelli, P., Masarie, K. A., and Lang, P.: Distributions and recent changes
of carbon monoxide in the lower troposphere, J. Geophys.
Res., 103, 19015–19033, https://doi.org/10.1029/98JD01366, 1998.
Petrenko, V. V., Martinerie, P., Novelli, P., Etheridge, D. M., Levin, I., Wang, Z., Blunier, T., Chappellaz, J., Kaiser, J., Lang, P., Steele, L. P., Hammer, S., Mak, J., Langenfelds, R. L., Schwander, J., Severinghaus, J. P., Witrant, E., Petron, G., Battle, M. O., Forster, G., Sturges, W. T., Lamarque, J.-F., Steffen, K., and White, J. W. C.: A 60 yr record of atmospheric carbon monoxide reconstructed from Greenland firn air, Atmos. Chem. Phys., 13, 7567–7585, https://doi.org/10.5194/acp-13-7567-2013, 2013.
Qi, H., Lin, W., Xu, X., Yu, X., and Ma, Q.: Significant downward trend of
SO2 observed from 2005 to 2010 at a background station in the Yangtze
Delta region, China, Science China Chemistry, 55, 1451–1458,
https://doi.org/10.1007/s11426-012-4524-y, 2012.
Ren, X., Brune, W. H., Cantrell, C. A., Edwards, G. D., Shirley, T.,
Metcalf, A. R., and Lesher, R. L.: Hydroxyl and Peroxy Radical Chemistry in
a Rural Area of Central Pennsylvania: Observations and Model Comparisons,
J. Atmos. Chem., 52, 231–257,
https://doi.org/10.1007/s10874-005-3651-7, 2005.
Seinfeld, J. H. and Pandis, S. N. (Eds.): Atmospheric chemistry and physics : from air pollution to climate change, 2nd ed, A Wiley-Interscience publication, Hoboken, New Jersey, USA, 2006.
State Council of the People's Republic of China: Action plan for the prevention and control of air pollution of the People's
Republic of China, available at: http://www.gov.cn/zhengce/content/2013-09/13/content_4561.htm (last access: 25 October 2020), 2013.
Thompson, A. M.: The Oxidizing Capacity of the Earth' s Atmosphere: Probable
Past and Future Changes, Science, 256, 1157–1165,
https://doi.org/10.1126/science.256.5060.1157, 1992.
Thompson, A. M. and Cicerone, R. J.: Possible perturbations to atmospheric
CO, CH4, and OH, J. Geophys. Res.-Atmos., 91,
10853–10864, https://doi.org/10.1029/JD091iD10p10853, 1986.
Türkoğlu, N., Çiçek, İ, and Gürgen, G.: Analysis of
effects of meteorological factors on air pollutant concentrations in Ankara,
Turkey, Il Nuovo Cimento C, 27, 347–358, https://doi.org/10.1393/ncc/i2004-10032-0,
2004.
van der Werf, G. R., Randerson, J. T., Giglio, L., van Leeuwen, T. T., Chen, Y., Rogers, B. M., Mu, M., van Marle, M. J. E., Morton, D. C., Collatz, G. J., Yokelson, R. J., and Kasibhatla, P. S.: Global fire emissions estimates during 1997–2016, Earth Syst. Sci. Data, 9, 697–720, https://doi.org/10.5194/essd-9-697-2017, 2017 (data available at: https://www.geo.vu.nl/~gwerf/GFED/GFED4/, last access: 1 October 2020).
Vukovich, F.: Weekday/Weekend Differences in OH Reactivity with VOCs and CO
in Baltimore, Maryland, J. Air Waste Manage., 50, 1843–1851, https://doi.org/10.1080/10473289.2000.10464205, 2000.
Wang, P., Elansky, N. F., Timofeev, Y. M., Wang, G., Golitsyn, G. S.,
Makarova, M. V., Rakitin, V. S., Shtabkin, Y., Skorokhod, A. I., Grechko, E.
I., Fokeeva, E. V., Safronov, A. N., Ran, L., and Wang, T.: Long-Term Trends
of Carbon Monoxide Total Columnar Amount in Urban Areas and Background
Regions: Ground- and Satellite-based Spectroscopic Measurements, Adv. Atmos.
Sci., 35, 785–795, https://doi.org/10.1007/s00376-017-6327-8, 2018.
Worden, H. M., Deeter, M. N., Frankenberg, C., George, M., Nichitiu, F., Worden, J., Aben, I., Bowman, K. W., Clerbaux, C., Coheur, P. F., de Laat, A. T. J., Detweiler, R., Drummond, J. R., Edwards, D. P., Gille, J. C., Hurtmans, D., Luo, M., Martínez-Alonso, S., Massie, S., Pfister, G., and Warner, J. X.: Decadal record of satellite carbon monoxide observations, Atmos. Chem. Phys., 13, 837–850, https://doi.org/10.5194/acp-13-837-2013, 2013.
Wu, Y., Xu, H., and Yu, D.: Characteristics of CO concentrations at the
Longfengshan regional background station, Environ. Chem., 27,
847–848, 2008.
Xue, M., Wang, Y., and Sun, Y.: Measurement on the Atmospheric CO
Concentration in Beijing, Environm. Sci., 27, 200–206, 2006.
Ye, F., An, J., Wang, Y., and Yang, J.: Analysis of O3, NOx, CO and
correlation meteorological factor at the ground layer in Beijing, Ecology
and Environment, 17, 115–122, 2008.
Yurganov, L., McMillan, W., Grechko, E., and Dzhola, A.: Analysis of global and regional CO burdens measured from space between 2000 and 2009 and validated by ground-based solar tracking spectrometers, Atmos. Chem. Phys., 10, 3479–3494, https://doi.org/10.5194/acp-10-3479-2010, 2010.
Zhang, F., Zhou, L. X., Novelli, P. C., Worthy, D. E. J., Zellweger, C., Klausen, J., Ernst, M., Steinbacher, M., Cai, Y. X., Xu, L., Fang, S. X., and Yao, B.: Evaluation of in situ measurements of atmospheric carbon monoxide at Mount Waliguan, China, Atmos. Chem. Phys., 11, 5195–5206, https://doi.org/10.5194/acp-11-5195-2011, 2011.
Zhang, G., Xu, H., Qi, B., Du, R., Gui, K., Wang, H., Jiang, W., Liang, L., and Xu, W.: Characterization of atmospheric trace gases and particulate matter in Hangzhou, China, Atmos. Chem. Phys., 18, 1705–1728, https://doi.org/10.5194/acp-18-1705-2018, 2018.
Zhao, H., Zheng, Y., Wei, L., Guan, Q., and Wang, Z.: Evolution and
evaluation of air quality in Hangzhou and its surrounding area during the
G20 summit, China Environmental Science, 37, 2016–2024, 2017.
Zhao, Y., Wang, S., Duan, L., Lei, Y., Cao, P., and Hao, J.: Primary air
pollutant emissions of coal-fired power plants in China: Current status and
future prediction, Atmos. Environ., 42, 8442–8452,
https://doi.org/10.1016/j.atmosenv.2008.08.021, 2008.
Zhao, Y., Nielsen, C. P., McElroy, M. B., Zhang, L., and Zhang, J.: CO
emissions in China: Uncertainties and implications of improved energy
efficiency and emission control, Atmos. Environ., 49, 103–113,
https://doi.org/10.1016/j.atmosenv.2011.12.015, 2012.
Zhou, L., Wen, Y., Li, J., Tang, J., and Zhang, X.: Background variation in
atmospheric carbon monoxide at Mt. Waliguan, China, Acta Scientiae
Circumstantiae, 24, 637–642, 2004.
Short summary
CO is one of the major air pollutants. Our study showed that the long-term CO levels at a background station in one of the most developed areas of China decreased significantly and verified that this downward trend was attributed to the decrease in anthropogenic emissions, which indicated that the adopted pollution control policies were effective. Also, this decrease has an implication for the atmospheric chemistry considering the negative correlation between CO levels and OH radical's lifetime.
CO is one of the major air pollutants. Our study showed that the long-term CO levels at a...
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