Search Results - "Poon, C. N."

Nitrate formation from heterogeneous uptake of dinitrogen pentoxide during a severe winter haze in southern China by Yun, Hui, Wang, Weihao, Wang, Tao, Xia, Men, Yu, Chuan, Wang, Zhe, Poon, Steven C. N, Yue, Dingli, Zhou, Yan

“…Nitrate (NO3-) has become a major component of fine particulate matter (PM2.5) during hazy days in China. However, the role of the heterogeneous reactions of…”
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Increasing surface ozone concentrations in the background atmosphere of Southern China, 1994–2007 by Wang, T., Wei, X. L., Ding, A. J., Poon, C. N., Lam, K. S., Li, Y. S., Chan, L. Y., Anson, M.

“…Tropospheric ozone is of great importance with regard to air quality, atmospheric chemistry, and climate change. In this paper we report the first continuous…”
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Observations of nitryl chloride and modeling its source and effect on ozone in the planetary boundary layer of southern China by Wang, Tao, Tham, Yee Jun, Xue, Likun, Li, Qinyi, Zha, Qiaozhi, Wang, Zhe, Poon, Steven C. N., Dubé, William P., Blake, Donald R., Louie, Peter K. K., Luk, Connie W. Y., Tsui, Wilson, Brown, Steven S.

“…Nitryl chloride (ClNO2) plays potentially important roles in atmospheric chemistry, but its abundance and effect are not fully understood due to the small…”
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Air quality during the 2008 Beijing Olympics: secondary pollutants and regional impact by Wang, T., Nie, W., Gao, J., Xue, L. K., Gao, X. M., Wang, X. F., Qiu, J., Poon, C. N., Meinardi, S., Blake, D., Wang, S. L., Ding, A. J., Chai, F. H., Zhang, Q. Z., Wang, W. X.

“…This paper presents the first results of the measurements of trace gases and aerosols at three surface sites in and outside Beijing before and during the 2008…”
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Characterizing the temporal variability and emission patterns of pollution plumes in the Pearl River Delta of China by Wang, Tao, Poon, C.N, Kwok, Y.H, Li, Y.S

“…The Pearl River Delta (PRD) is a fast developing region in China that has experienced serious air pollution such as high ozone (O 3) and poor visibility. In…”
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Chemical characterization of the boundary layer outflow of air pollution to Hong Kong during February–April 2001 by Wang, Tao, Ding, A. J., Blake, D. R., Zahorowski, W., Poon, C. N., Li, Y. S.

“…As a cooperative effort with the TRACE‐P and ACE‐Asia intensive in the spring of 2001, trace gases and aerosols were measured at a relatively remote coastal…”
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Peroxyacetyl nitrate measurements by thermal dissociation-chemical ionization mass spectrometry in an urban environment： performance and characterizations by Wang, Xinfeng, Wang, Tao, Xue, Likun, Nie, Wei, Xu, Zheng, Poon, Steven C. N., Wang, Wenxing

“…Peroxyacetyl nitrate （PAN） is an important indicator of photochemical smog and has adverse effects on human health and vegetation growth. A rapid and h!ghly…”
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Source of surface ozone and reactive nitrogen speciation at Mount Waliguan in western China: New insights from the 2006 summer study by 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., Wang, W. X.

“…Surface ozone (O3), carbon monoxide (CO), and total and speciated reactive nitrogen compounds (NOy, NO, NO2, PAN, HNO3, and particulate were measured at Mount…”
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Photochemical evolution of organic aerosols observed in urban plumes from Hong Kong and the Pearl River Delta of China by Zhou, Shengzhen, Wang, Tao, Wang, Zhe, Li, Weijun, Xu, Zheng, Wang, Xinfeng, Yuan, Chao, Poon, C.N., Louie, Peter K.K., Luk, Connie W.Y., Wang, Wenxing

“…Organic aerosols influence human health and global radiative forcing. However, their sources and evolution processes in the atmosphere are not completely…”
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Continuous measurement of peroxyacetyl nitrate (PAN) in suburban and remote areas of western China by Zhang, J.M., Wang, T., Ding, A.J., Zhou, X.H., Xue, L.K., Poon, C.N., Wu, W.S., Gao, J., Zuo, H.C., Chen, J.M., Zhang, X.C., Fan, S.J.

“…Knowledge on atmospheric abundance of peroxyacetyl nitrate (PAN) is important in assessing the severity of photochemical pollution, and for understanding…”
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Nighttime NOx loss and ClNO2 formation in the residual layer of a polluted region: Insights from field measurements and an iterative box model by Yun, Hui, Wang, Tao, Wang, Weihao, Tham, Yee Jun, Li, Qinyi, Wang, Zhe, Poon, Steven C.N.

“…The heterogeneous reaction of dinitrogen pentoxide (N2O5) on aerosols is an important sink of nitrogen oxides (NOx) in the polluted boundary layer, and the…”
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Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2 by Peng, Xiang, Wang, Tao, Wang, Weihao, Ravishankara, A. R., George, Christian, Xia, Men, Cai, Min, Li, Qinyi, Salvador, Christian Mark, Lau, Chiho, Lyu, Xiaopu, Poon, Chun Nan, Mellouki, Abdelwahid, Mu, Yujing, Hallquist, Mattias, Saiz-Lopez, Alfonso, Guo, Hai, Herrmann, Hartmut, Yu, Chuan, Dai, Jianing, Wang, Yanan, Wang, Xinke, Yu, Alfred, Leung, Kenneth, Lee, Shuncheng, Chen, Jianmin

“…Chlorine atoms (Cl) are highly reactive and can strongly influence the abundances of climate and air quality-relevant trace gases. Despite extensive research…”
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Nitrous acid in a street canyon environment: Sources and contributions to local oxidation capacity by Yun, Hui, Wang, Zhe, Zha, Qiaozhi, Wang, Weihao, Xue, Likun, Zhang, Li, Li, Qinyi, Cui, Long, Lee, Shuncheng, Poon, Steven C.N., Wang, Tao

“…Nitrous acid (HONO) plays an important role in radical formation and photochemical oxidation processes in the boundary layer. However, its impact on the…”
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Nighttime NO x loss and ClNO 2 formation in the residual layer of a polluted region: Insights from field measurements and an iterative box model by Yun, Hui, Wang, Tao, Wang, Weihao, Tham, Yee Jun, Li, Qinyi, Wang, Zhe, Poon, Steven C N

“…The heterogeneous reaction of dinitrogen pentoxide (N O ) on aerosols is an important sink of nitrogen oxides (NO ) in the polluted boundary layer, and the…”
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Chemical characterization of the boundary layer outflow of air pollution to Hong Kong during February-April 2001 : NASA global tropospheric experiment transport and chemical evolution over the Pacific (TRACE-P): Measurements and analysis (TRACEP1) by TAO WANG, DING, A. J, BLAKE, D. R, ZAHOROWSKI, W, POON, C. N, LI, Y. S

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Real-time textural edge detection by incoherent spatial Gaussian bandpass filtering by Park, J., Poon, T.C.

“…A technique for textural edge detection using an acoustooptic two-pupil heterodyne scanning system is proposed. A textural region is modeled as a…”
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