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 GEP  Vol.5 No.4 , April 2017
Artificial Seeding Effects of Convective Clouds on the Opening Day of Beijing 2008 Summer Olympics
Abstract: Using the radar reflectivity and intensive rainfall data, artificial seeding effects of convective clouds in Beijing on 8 August 2008, the opening day of the 29th Summer Olympics, were analyzed. The results indicate that, cloud seeding at single operation site for convective clouds invading from southwest direction may sharply mitigate the rainfall observed at leeward automatic weather stations within 5 - 10 min, while enhances the precipitation at a later stage about 10 - 20 min. Cloud seeding effects of operation sites Yuegezhuangxi, Changgouzhen, and Zhoukou, which are placed along the main moving routes or localized developing convective clouds in the west and center parts of Fangshan district, are very conspicuous. Combining the operation sites distribution and radar echoes, it is found that the site Changgouzhen, which is very close to the convective core, plays an essential role in suppressing the growth of convective cloud, reducing the coverage area of intense echoes classified as 45 - 60 dBZ, as well as mitigating the precipitation from neighboring automatic weather stations. Based on radar reflectivity and rainfall data, we find that the clouds over lots of operation sites in eastern Fangshan district are not cold enough to favor glaciogenic seeding with silver iodide, meanwhile, there is not too much precipitation observed.
Cite this paper: Li, H. , Dai, Y. , Wang, H. and Cui, J. (2017) Artificial Seeding Effects of Convective Clouds on the Opening Day of Beijing 2008 Summer Olympics. Journal of Geoscience and Environment Protection, 5, 118-138. doi: 10.4236/gep.2017.54010.
References

[1]   Schaefer, V.J. (1946) The Production of Ice Crystals in a Cloud of Supercooled Water Droplets. Science, 104, 457-459.
https://doi.org/10.1126/science.104.2707.457

[2]   Huang, M., Shen, Z. and Hong, Y. (2003) Advance of Research on Cloud and Precipitation and Weather Modification in the Latest Half Century. Chinese Journal of Atmospheric Sciences, 27, 536-551. (In Chinese)

[3]   Lei, H., Hong, Y., Zhao, Z., Xiao, H. and Guo, X. (2008) Advances in Cloud and Precipitation Physics and Weather Modification in Recent Years. Chinese Journal of Atmospheric Sciences, 32, 967-974. (In Chinese)

[4]   Zhang, J., Su, Z., Guan, L., Huang, G. and Shi, A. (2005) Study and Ideas of Some Front Scientific Issues on Weather Modification. Proceedings of the 14th Chinese Scientific Conference on Cloud and Precipitation Physics and Weather Modification, Guiyang, Chinese Meteorological Society, 753-754.

[5]   Ye, J. (1993) On the Possibility of Artificial Suppression of Heavy Rains. Journal of Nanjing Institute of Meteorology, 16, 373-378. (In Chinese)

[6]   Li, D., Zhang, C., Xu, H., et al. (2002) The Status and Development Prospects of Weather Modification. Meteorological Press, 586 p. (In Chinese)

[7]   Bedritsky, A.I. and Chernikov, A.A. (1996) Cloud Seeding to Protect Moscow from Rain on 9 May 1995. World Meteorological Organization Bulletin, 45, 60-64.

[8]   Petrov, V., et al. (1998) “95.5.9” Cloud Dispersal and Rain Mitigation Experiments with Multi-Aircrafts in Moscow City (Translated into Chinese). Xinjiang Meteorology, 21, 44-47. (In Chinese)

[9]   Korneev, V.P., Petrov, V.V., Diadyuchenko, V.N., et al. (2003) Results of Cloud Seeding Operations to Modify Weather Conditions over Cities. Proceedings of the 8th WMO Scientific Conference on Weather Modification, Casablanca, Morocco, WMO/TD-No. 1146, 227-230.

[10]   Koloskov, B.P., Korneev, V.P., Petrov, V.V., et al. (2007) Cloud Seeding Operations to Modify Weather Conditions over Cities: 2003-2006. Proceedings of the 9th WMO Scientific Conference on Weather Modification, Antalia, Turkey, WMP-No. 44.

[11]   Petrov, V.V., Egorov, O.G., Melnik, S.V., Zakharov, A.M. and Skuratov, S.N. (2007) “Land-Aircraft-Land” Data Transmission System. Proceedings of the 9th WMO Scientific Conference on Weather Modification, Antalia, Turkey, WMP-No. 44.

[12]   Zhu, Y., Chen, Y., Li, Q. and Xiong, A. (2006) Preliminary Analysis on Meteorological Conditions during 2008 Beijing Olympic Games. Journal of Applied Meteorological Science, 17, 35-41. (In Chinese)

[13]   Zhang, Q., He, H., Liu, J., et al. (2009) Brief Introduction of Rain Mitigation Operation during Beijing 2008 Olympic Opening Ceremony. Meteorological Monthly, 35, 3-15. (In Chinese)

[14]   Zhang, Q., He, H., Huang, M., et al. (2011) Brief Introduction of the Rain Mitigation Operations during Beijing 2008 Olympic Opening Ceremony. 18th Conference on Planned and Inadvertent Weather Modification, Seattle, Extended Abstracts Volume, Washington, American Meteorological Society.
https://ams.confex.com/ams/91Annual/webprogram/Paper178055.html

[15]   Li, H., Zhou, W. and Zhou, Y. (2008) Change of Satellite Retrieving Cloud Parameters during Artificial Rain Mitigation Operation. Meteorological Monthly, 34, 136-140. (In Chinese)

[16]   He, H. and Ma, J. (2008) The Comprehensive Analysis of the Characteristics of Radar Echo during Artificial Rain Mitigation Operation. Meteorological Monthly, 34, 145-149. (In Chinese)

[17]   Li, H., Ma, J., Ma, Y. and Tao, Y. (2011) Characteristics of Cloud-Precipitation and the Impact of Weather Modification Activities on the Opening Day of the Beijing 2008 Olympics. Climatic and Environmental Research, 16, 175-187. (In Chinese)

[18]   He, H., Jin, H., Li, H. and Liu, J. (2012) Preliminary Study of the Mesoscale Numerical Simulation of the Rain Mitigation Operation during the Opening Ceremony of the 2008 Beijing Olympic Games. Climatic and Environmental Research, 17, 46-58. (In Chinese)

[19]   Dong, L., Zhang, M., Guo, H. and Zhou, Q. (2008) Preliminary Analysis on Weather Forecasting Difficulties during the Opening Ceremony of 2008 Beijing Olympic Games. Meteorological Monthly, 34, 9-15. (In Chinese)

[20]   Rokicki, M.L. and Young, K.C. (1978) The Initiation of Precipitation in Updrafts. Journal of Applied Meteorology, 17, 745-754.
https://doi.org/10.1175/1520-0450(1978)017<0745:TIOPIU>2.0.CO;2

[21]   Huang, M., Xu, H., Wang, A., et al. (1979) Studies of Influence on Development of Convective Clouds by Explosion. Chinese Journal of Atmospheric Sciences, 3, 280-288. (In Chinese)

[22]   Xu, H., Huang, M., Hao, J., et al. (1986) Numerical Study of Artificial Effects on Cumulus Clouds Macroscopic Dynamic. Proceedings of Cloud Physics and Weather Modification in South China, The Edit Group, Meteorological Press, 121-124. (In Chinese)

[23]   Zhou, F., Xiao, H. and Huang, M. (2005) Modeling Evaluation of Effects of Artificial Updraft Restraints in a Strong Hailstorm on Its Precipitation. Journal of Nanjing Institute of Meteorology, 28, 153-162. (In Chinese)

 
 
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