Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Xu, Wanyun; Lin, Weili; Xu, Xiaobin; Tang, Jie; Huang, Jianqing; Wu, Hao; Zhang, Xiaochun (2016)
Publisher: Copernicus Publications
Languages: English
Types: Article
Subjects: Chemistry, QD1-999, Physics, QC1-999
Tropospheric ozone is an important atmospheric oxidant, greenhouse gas and atmospheric pollutant at the same time. The oxidation capacity of the atmosphere, climate, human and vegetation health can be impacted by the increase of the ozone level. Therefore, long-term determination of trends of baseline ozone is highly needed information for environmental and climate change assessment. So far, studies on the long-term trends of ozone at representative sites are mainly available for European and North American sites. Similar studies are lacking for China and many other developing countries. Measurements of surface ozone were carried out at a baseline Global Atmospheric Watch (GAW) station in the north-eastern Tibetan Plateau region (Mt Waliguan, 36°17′ N, 100°54′ E, 3816 m a.s.l.) for the period of 1994 to 2013. To uncover the variation characteristics, long-term trends and influencing factors of surface ozone at this remote site in western China, a two-part study has been carried out, with this part focusing on the overall characteristics of diurnal, seasonal and long-term variations and the trends of surface ozone. To obtain reliable ozone trends, we performed the Mann–Kendall trend test and the Hilbert–Huang transform (HHT) analysis on the ozone data. Our results confirm that the mountain-valley breeze plays an important role in the diurnal cycle of surface ozone at Waliguan, resulting in higher ozone values during the night and lower ones during the day, as was previously reported. Systematic diurnal and seasonal variations were found in mountain-valley breezes at the site, which were used in defining season-dependent daytime and nighttime periods for trend calculations. Significant positive trends in surface ozone were detected for both daytime (0.24 ± 0.16 ppbv year−1) and nighttime (0.28 ± 0.17 ppbv year−1). The largest nighttime increasing rate occurred in autumn (0.29 ± 0.11 ppbv year−1), followed by spring (0.24 ± 0.12 ppbv year−1), summer (0.22 ± 0.20 ppbv year−1) and winter (0.13 ± 0.10 ppbv year−1), respectively. The HHT spectral analysis identified four different stages with different positive trends, with the largest increase occurring around May 2000 and October 2010. The HHT results suggest that there were 2–4a, 7a and 11a periodicities in the time series of surface ozone at Waliguan. The results of this study can be used for assessments of climate and environment change and in the validation of chemistry–climate models.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Ambrose, J. L., Reidmiller, D. R., and Jaffe, D. A.: Causes of high O3 in the lower free troposphere over the Pacific Northwest as observed at the Mt. Bachelor Observatory, Atmos. Environ., 45, 5302-5315, doi:10.1016/j.atmosenv.2011.06.056, 2011.
    • Cooper, O. R., Parrish, D. D., Stohl, A., Trainer, M., Nedelec, P., Thouret, V., Cammas, J. P., Oltmans, S. J., Johnson, B. J., Tarasick, D., Leblanc, T., McDermid, I. S., Jaffe, D., Gao, R., Stith, J., Ryerson, T., Aikin, K., Campos, T., Weinheimer, A., and Avery, M. A.: Increasing springtime ozone mixing ratios in the free troposphere over western North America, Nature, 463, 344-348, doi:10.1038/nature08708, 2010.
    • Cooper, O. R., Parrish, D., Ziemke, J., Balashov, N., Cupeiro, M., Galbally, I., Gilge, S., Horowitz, L., Jensen, N., and Lamarque, J.-F.: Global distribution and trends of tropospheric ozone: An observation-based review, Elementa: Science of the Anthropocene, 2, 000029, doi:10.12952/journal.elementa.000029, 2014.
    • Cui, J., Pandey Deolal, S., Sprenger, M., Henne, S., Staehelin, J., Steinbacher, M., and Nédélec, P.: Free tropospheric ozone changes over Europe as observed at Jungfraujoch (1990-2008): An analysis based on backward trajectories, J. Geophys. Res.- Atmos., 116, D10304, doi:10.1029/2010JD015154, 2011.
    • Ding, A. and Wang, T.: Influence of stratosphere-to-troposphere exchange on the seasonal cycle of surface ozone at Mount Waliguan in western China, Geophys. Res. Lett., 33, L03803, doi:10.1029/2005GL024760, 2006.
    • Ding, A. J., Wang, T., Thouret, V., Cammas, J.-P., and Nédélec, P.: Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program, Atmos. Chem. Phys., 8, 1-13, doi:10.5194/acp-8-1-2008, 2008.
    • El-Askary, H., Sarkar, S., Chiu, L., Kafatos, M., and El-Ghazawi, T.: Rain gauge derived precipitation variability over Virginia and its relation with the El Nino southern oscillation, Adv. Space Res., 33, 338-342, doi:10.1016/S0273-1177(03)00478-2, 2004.
    • Gilge, S., Plass-Duelmer, C., Fricke, W., Kaiser, A., Ries, L., Buchmann, B., and Steinbacher, M.: Ozone, carbon monoxide and nitrogen oxides time series at four alpine GAW mountain stations in central Europe, Atmos. Chem. Phys., 10, 12295-12316, doi:10.5194/acp-10-12295-2010, 2010.
    • Hamed, K. H. and Ramachandra Rao, A.: A modified MannKendall trend test for autocorrelated data, J. Hydrol., 204, 182- 196, doi:10.1016/S0022-1694(97)00125-X, 1998.
    • Helsel, D. R., Mueller, D. K., and Slack, J. R.: Computer program for the Kendall family of trend tests: U.S. Geological Survey Scientific Investigations Report 2005-5275, 4 pp., available at: http://pubs.usgs.gov/sir/2005/5275/pdf/sir2005-5275. pdf (last access: 3 February 2016), 2006.
    • Huang, N. E.: Hilbert-Huang transform and its applications, World Scientific, Singapore, 2014.
    • Huang, N. E. and Wu, Z.: A review on Hilbert-Huang transform: Method and its applications to geophysical studies, Rev. Geophys., 46, RG2006, doi:10.1029/2007RG000228, 2008.
    • Huang, N. E., Shen, Z., Long, S. R., Wu, M. C., Shih, H. H., Zheng, Q., Yen, N.-C., Tung, C. C., and Liu, H. H.: The empirical mode decomposition and the Hilbert spectrum for nonlinear and nonstationary time series analysis, P. Roy. Soc. Lond. A Mat., 454, 903-995, 1998.
    • Huang, N. E., Wu, M.-L. C., Long, S. R., Shen, S. S., Qu, W., Gloersen, P., and Fan, K. L.: A confidence limit for the empirical mode decomposition and Hilbert spectral analysis, P. Roy. Soc. Lond. A Mat., 459, 2317-2345, 2003.
    • IPCC: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge Univ. Press, Cambridge, United Kingdom and New York, NY, USA, 1535, 2013.
    • Ji, C. P., Zou, H., and Zhou, L. B.: QBO Signal in Total Ozone Over the Tibet, Climatic and Environmental Research, 6, 416- 424, 2001.
    • Jia, S., Xu, X., Lin, W., Wang, Y., He, X., and Zhang, H.: Increased mixing ratio of surface ozone by nighttime convection process over the North China Plain, J. Appl. Meteorol. Sci., 26, 280-290, 2015.
    • Kendall, M. G.: Rank Correlation Methods, Charles Griffin, London, 1955.
    • Lal, S., Venkataramani, S., Chandra, N., Cooper, O. R., Brioude, J., and Naja, M.: Transport effects on the vertical distribution of tropospheric ozone over western India, J. Geophys. Res.-Atmos., 119, 10012-10026, doi:10.1002/2014JD021854, 2014.
    • Langford, A. O., Aikin, K. C., Eubank, C. S., and Williams, E. J.: Stratospheric contribution to high surface ozone in Colorado during springtime, Geophys. Res. Lett., 36, L12801, doi:10.1029/2009GL038367, 2009.
    • Langford, A. O., Senff, C. J., Alvarez Ii, R. J., Brioude, J., Cooper, O. R., Holloway, J. S., Lin, M. Y., Marchbanks, R. D., Pierce, R. B., Sandberg, S. P., Weickmann, A. M., and Williams, E. J.: An overview of the 2013 Las Vegas Ozone Study (LVOS): Impact of stratospheric intrusions and long-range transport on surface air quality, Atmos. Environ., 109, 305-322, doi:10.1016/j.atmosenv.2014.08.040, 2015.
    • Lefohn, A. S., Wernli, H., Shadwick, D., Oltmans, S. J., and Shapiro, M.: Quantifying the importance of stratospherictropospheric transport on surface ozone concentrations at highand low-elevation monitoring sites in the United States, Atmos. Environ., 62, 646-656, doi:10.1016/j.atmosenv.2012.09.004, 2012.
    • Lelieveld, J. and Dentener, F. J.: What controls tropospheric ozone?, J. Geophys. Res.-Atmos., 105, 3531-3551, doi:10.1029/1999JD901011, 2000.
    • Levy, H.: Normal Atmosphere: Large Radical and Formaldehyde Concentrations Predicted, Science, 173, 141-143, doi:10.1126/science.173.3992.141, 1971.
    • Li, X., Liu, J., Mauzerall, D. L., Emmons, L. K., Walters, S., Horowitz, L. W., and Tao, S.: Effects of trans-Eurasian transport of air pollutants on surface ozone concentrations over Western China, J. Geophys. Res.-Atmos., 119, 12338-12354, doi:10.1002/2014JD021936, 2014.
    • Lin, M., Fiore, A. M., Horowitz, L. W., Cooper, O. R., Naik, V., Holloway, J., Johnson, B. J., Middlebrook, A. M., Oltmans, S. J., Pollack, I. B., Ryerson, T. B., Warner, J. X., Wiedinmyer, C., Wilson, J., and Wyman, B.: Transport of Asian ozone pollution into surface air over the western United States in spring, J. Geophys. Res.-Atmos., 117, D00V07, doi:10.1029/2011JD016961, 2012.
    • Lin, M., Horowitz, L. W., Oltmans, S. J., Fiore, A. M., and Fan, S.: Tropospheric ozone trends at Mauna Loa Observatory tied to decadal climate variability, Nat. Geosci., 7, 136-143, doi:10.1038/ngeo2066, 2014.
    • Lin, M., Fiore, A. M., Horowitz, L. W., Langford, A. O., Oltmans, S. J., Tarasick, D., and Rieder, H. E.: Climate variability modulates western US ozone air quality in spring via deep stratospheric intrusions, Nat. Commun., 6, 7105, doi:10.1038/ncomms8105, 2015a.
    • Lin, M., Horowitz, L. W., Cooper, O. R., Tarasick, D., Conley, S., Iraci, L. T., Johnson, B., Leblanc, T., Petropavlovskikh, I., and Yates, E. L.: Revisiting the evidence of increasing springtime ozone mixing ratios in the free troposphere over western North America, Geophys. Res. Lett., 42, 8719-8728, doi:10.1002/2015GL065311, 2015b.
    • Logan, J. A., Staehelin, J., Megretskaia, I. A., Cammas, J. P., Thouret, V., Claude, H., De Backer, H., Steinbacher, M., Scheel, H. E., Stübi, R., Fröhlich, M., and Derwent, R.: Changes in ozone over Europe: Analysis of ozone measurements from sondes, regular aircraft (MOZAIC) and alpine surface sites, J. Geophys. Res.-Atmos., 117, D09301, doi:10.1029/2011JD016952, 2012.
    • Lundquist, J. K.: Intermittent and Elliptical Inertial Oscillations in the Atmospheric Boundary Layer, J. Atmos. Sci., 60, 2661-2673, doi:10.1175/1520-0469(2003)060<2661:IAEIOI>2.0.CO;2, 2003.
    • Ma, J., Liu, H., and Hauglustaine, D.: Summertime tropospheric ozone over China simulated with a regional chemical transport model 1. Model description and evaluation, J. Geophys. Res.-Atmos., 107, ACH 27-21-ACH 27-13, doi:10.1029/2001JD001354, 2002a.
    • Ma, J., Tang, J., Zhou, X., and Zhang, X.: Estimates of the Chemical Budget for Ozone at Waliguan Observatory, J. Atmos. Chem., 41, 21-48, doi:10.1023/A:1013892308983, 2002b.
    • Ma, J., Zheng, X., and Xu, X.: Comment on “Why does surface ozone peak in summertime at Waliguan?” by Bin Zhu et al., Geophys. Res. Lett., 32, L01805, doi:10.1029/2004GL021683, 2005.
    • Ma, J., Lin, W. L., Zheng, X. D., Xu, X. B., Li, Z., and Yang, L. L.: Influence of air mass downward transport on the variability of surface ozone at Xianggelila Regional Atmosphere Background Station, southwest China, Atmos. Chem. Phys., 14, 5311-5325, doi:10.5194/acp-14-5311-2014, 2014.
    • Ma, Z., Xu, J., Quan, W., Zhang, Z., Lin, W., and Xu, X.: Significant increase of surface ozone at a rural site, north of eastern China, Atmos. Chem. Phys., 16, 3969-3977, doi:10.5194/acp-16-3969- 2016, 2016.
    • Monks, P. S.: A review of the observations and origins of the spring ozone maximum, Atmos. Environ., 34, 3545-3561, doi:10.1016/S1352-2310(00)00129-1, 2000.
    • Monks, P. S., Archibald, A. T., Colette, A., Cooper, O., Coyle, M., Derwent, R., Fowler, D., Granier, C., Law, K. S., Mills, G. E., Stevenson, D. S., Tarasova, O., Thouret, V., von Schneidemesser, E., Sommariva, R., Wild, O., and Williams, M. L.: Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer, Atmos. Chem. Phys., 15, 8889-8973, doi:10.5194/acp-15-8889-2015, 2015.
    • Oltmans, S. J., Lefohn, A. S., Harris, J. M., Galbally, I., Scheel, H. E., Bodeker, G., Brunke, E., Claude, H., Tarasick, D., Johnson, B. J., Simmonds, P., Shadwick, D., Anlauf, K., Hayden, K., Schmidlin, F., Fujimoto, T., Akagi, K., Meyer, C., Nichol, S., Davies, J., Redondas, A., and Cuevas, E.: Long-term changes in tropospheric ozone, Atmos. Environ., 40, 3156-3173, doi:10.1016/j.atmosenv.2006.01.029, 2006.
    • Oltmans, S. J., Lefohn, A. S., Shadwick, D., Harris, J. M., Scheel, H. E., Galbally, I., Tarasick, D. W., Johnson, B. J., Brunke, E. G., Claude, H., Zeng, G., Nichol, S., Schmidlin, F., Davies, J., Cuevas, E., Redondas, A., Naoe, H., Nakano, T., and Kawasato, T.: Recent tropospheric ozone changes - A pattern dominated by slow or no growth, Atmos. Environ., 67, 331-351, doi:10.1016/j.atmosenv.2012.10.057, 2013.
    • Parrish, D. D., Law, K. S., Staehelin, J., Derwent, R., Cooper, O. R., Tanimoto, H., Volz-Thomas, A., Gilge, S., Scheel, H.-E., Steinbacher, M., and Chan, E.: Long-term changes in lower tropospheric baseline ozone concentrations at northern mid-latitudes, Atmos. Chem. Phys., 12, 11485-11504, doi:10.5194/acp-12- 11485-2012, 2012.
    • Parrish, D. D., Law, K. S., Staehelin, J., Derwent, R., Cooper, O. R., Tanimoto, H., Volz-Thomas, A., Gilge, S., Scheel, H. E., Steinbacher, M., and Chan, E.: Lower tropospheric ozone at northern midlatitudes: Changing seasonal cycle, Geophys. Res. Lett., 40, 1631-1636, doi:10.1002/grl.50303, 2013.
    • Rao, A. R. and Hsu, E.-C.: Hilbert-Huang Transform Analysis of Hydrological and Environmental Time Series, 1st Edn., Water Science and Technology Library, 60, Springer, the Netherlands, 2008.
    • The Royal Society: Ground-level ozone in the 21st century: future trends, impacts and policy implications, The Royal Society, 0854037136, available at: https://royalsociety.org/~/media/ Royal_Society_Content/policy/publications/2008/7925.pdf (last access: 16 May 2016), 2008.
    • Sen, P. K.: Estimates of the regression coef?cient based on Kendall's tau, J. Am. Stat. Assoc., 63, 1379-1389, 1968.
    • Stohl, A., Bonasoni, P., Cristofanelli, P., Collins, W., Feichter, J., Frank, A., Forster, C., Gerasopoulos, E., Gäggeler, H., James, P., Kentarchos, T., Kromp-Kolb, H., Krüger, B., Land, C., Meloen, J., Papayannis, A., Priller, A., Seibert, P., Sprenger, M., Roelofs, G. J., Scheel, H. E., Schnabel, C., Siegmund, P., Tobler, L., Trickl, T., Wernli, H., Wirth, V., Zanis, P., and Zerefos, C.: Stratosphere-troposphere exchange: A review, and what we have learned from STACCATO, J. Geophys. Res.-Atmos., 108, 8516, doi:10.1029/2002JD002490, 2003.
    • Tang, Q., Prather, M. J., and Hsu, J.: Stratosphere-troposphere exchange ozone flux related to deep convection, Geophys. Res. Lett., 38, L03806, doi:10.1029/2010gl046039, 2011.
    • Tarasova, O. A., Senik, I. A., Sosonkin, M. G., Cui, J., Staehelin, J., and Prévôt, A. S. H.: Surface ozone at the Caucasian site Kislovodsk High Mountain Station and the Swiss Alpine site Jungfraujoch: data analysis and trends (1990-2006), Atmos. Chem. Phys., 9, 4157-4175, doi:10.5194/acp-9-4157-2009, 2009.
    • Vingarzan, R.: A review of surface ozone background levels and trends, Atmos. Environ., 38, 3431-3442, doi:10.1016/j.atmosenv.2004.03.030, 2004.
    • Wang, Q. Y., Gao, R. S., Cao, J. J., Schwarz, J. P., Fahey, D. W., Shen, Z. X., Hu, T. F., Wang, P., Xu, X. B., and Huang, R. J.: Observations of high level of ozone at Qinghai Lake basin in the northeastern Qinghai-Tibetan Plateau, western China, J. Atmos. Chem., 72, 19-26, doi:10.1007/s10874-015-9301-9, 2015.
    • Wang, T., Ding, A., Gao, J., and Wu, W. S.: Strong ozone production in urban plumes from Beijing, China, Geophys. Res. Lett., 33, L21806, doi:10.1029/2006gl027689, 2006a.
    • Wang, T., Wong, H. L. A., Tang, J., Ding, A., Wu, W. S., and Zhang, X. C.: On the origin of surface ozone and reactive nitrogen observed at a remote mountain site in the northeastern QinghaiTibetan Plateau, western China, J. Geophys. Res.-Atmos., 111, D08303, doi:10.1029/2005JD006527, 2006b.
    • Wang, T., Wei, X. L., Ding, A. J., Poon, C. N., Lam, K. S., Li, Y. S., Chan, L. Y., and Anson, M.: Increasing surface ozone concentrations in the background atmosphere of Southern China, 1994- 2007, Atmos. Chem. Phys., 9, 6217-6227, doi:10.5194/acp-9- 6217-2009, 2009.
    • Wang, Y., Konopka, P., Liu, Y., Chen, H., Müller, R., Plöger, F., Riese, M., Cai, Z., and Lü, D.: Tropospheric ozone trend over Beijing from 2002-2010: ozonesonde measurements and modeling analysis, Atmos. Chem. Phys., 12, 8389-8399, doi:10.5194/acp-12-8389-2012, 2012.
    • Xu, X., Lin, W., Wang, T., Yan, P., Tang, J., Meng, Z., and Wang, Y.: Long-term trend of surface ozone at a regional background station in eastern China 1991-2006: enhanced variability, Atmos. Chem. Phys., 8, 2595-2607, doi:10.5194/acp-8-2595-2008, 2008.
    • Xu, X., Tang, J., and Lin, W.: The trend and variability of surface ozone at the global GAW station Mt. WALIGUAN, China, in: Second Tropospheric Ozone Workshop Tropospheric Ozone Changes: Observations, state of understanding and model performances, WMO/GAW report, WMO, Geneva, 49-55, 2011.
    • Xue, L. K., Wang, T., Zhang, J. M., Zhang, X. C., Deliger, Poon, C. N., Ding, A. J., Zhou, X. H., Wu, W. S., Tang, J., Zhang, Q. Z., and Wang, W. X.: Source of surface ozone and reactive nitrogen speciation at Mount Waliguan in western China: New insights from the 2006 summer study, J. Geophys. Res., 116, D07306, doi:10.1029/2010jd014735, 2011.
    • Yang, Y., Liao, H., and Li, J.: Impacts of the East Asian summer monsoon on interannual variations of summertime surfacelayer ozone concentrations over China, Atmos. Chem. Phys., 14, 6867-6879, doi:10.5194/acp-14-6867-2014, 2014.
    • Young, P. J., Archibald, A. T., Bowman, K. W., Lamarque, J.-F., Naik, V., Stevenson, D. S., Tilmes, S., Voulgarakis, A., Wild, O., Bergmann, D., Cameron-Smith, P., Cionni, I., Collins, W. J., Dalsøren, S. B., Doherty, R. M., Eyearing, V., Faluvegi, G., Horowitz, L. W., Josse, B., Lee, Y. H., MacKenzie, I. A., Nagashima, T., Plummer, D. A., Righi, M., Rumbold, S. T., Skeie, R. B., Shindell, D. T., Strode, S. A., Sudo, K., Szopa, S., and Zeng, G.: Pre-industrial to end 21st century projections of tropospheric ozone from the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP), Atmos. Chem. Phys., 13, 2063-2090, doi:10.5194/acp-13-2063-2013, 2013.
    • Zellweger, C., Hofer, P., and Buchmann, B.: System and Performance Audit of Surface Ozone and Carbon Monoxide at the China GAW Baseline Observatory Waliguan Mountain, WCCEmpa Report 00/3Rep., 46 pp., Empa, Dübendorf, Switzerland, available at: http://gaw.empa.ch/audits/WLG_2000.pdf (last access: 3 February 2016), 2000.
    • Zellweger, C., Klausen, J., and Buchmann, B.: System and Performance Audit of Surface Ozone Carbon Monoxide and Methane at the Global GAW Station Mt. Waliguan, China, October 2004, WCC-Empa Report 04/3Rep., 52 pp., Empa, Dübendorf, Switzerland, available at: http://gaw.empa.ch/audits/WLG_ 2004.pdf (last access: 3 February 2016), 2004.
    • Zellweger, C., Klausen, J., Buchmann, B., and Scheel, H.-E.: System and Performance Audit of Surface Ozone, Carbon Monoxide, Methane and Nitrous Oxide at the GAW Global Station Mt. Waliguan and the Chinese Academy of Meteorological Sciences (CAMS) China, June 2009, WCC-Empa Report 09/2Rep., 61 pp, Empa, Dübendorf, Switzerland, available at: https://www.wmo.int/pages/prog/arep/gaw/documents/ WLG_2009.pdf (last access: 3 February 2016), 2009.
    • 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, doi:10.5194/acp-11-5195- 2011, 2011.
    • Zheng, X. D., Shen, C. D., Wan, G. J., Liu, K. X., Tang, J., and Xu, X. B.: 10Be/ 7Be implies the contribution of stratospheretroposphere transport to the winter-spring surface O3 variation observed on the Tibetan Plateau, Chinese Sci. Bull., 56, 84-88, 2011.
    • Zhu, B., Akimoto, H., Wang, Z., Sudo, K., Tang, J., and Uno, I.: Why does surface ozone peak in summertime at Waliguan?, Geophys. Res. Lett., 31, L17104, doi:10.1029/2004GL020609, 2004.
  • No related research data.
  • Discovered through pilot similarity algorithms. Send us your feedback.

Share - Bookmark

Cite this article