Abstract
This study aims to examine the effect of El Niño and La Niña on the monthly and seasonal climate of Hong Kong against the ENSO-neutral situation from a statistical perspective. Monthly and seasonal temperature and rainfall of Hong Kong and monthly number of tropical cyclones (TCs) coming within 500 km of the city over the 59-yr (1950–2008) period are examined under three ENSO situations, namely El Niño, La Niña, and ENSO-neutral. It is found that, compared with the ENSO-neutral situation, El Niño tends to be associated with wetter winter (December–February) and spring (March-May) while La Niña tends to be associated with cooler autumn (September–November) and winter. El Niño tends to be associated with a later start of the tropical cyclone season of Hong Kong while La Niña tends to be associated with more TCs coming within 500 km of Hong Kong in August–October. It is also found that, for April and June-December, although the monthly number of TCs coming within 500 km of Hong Kong during El Niño is generally lower than that under the ENSO-neutral situation, the difference is not statistically significant based on the current data sample size.
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References
Au, C. H., and W. L. Chang, 1998: Rainfall in Hong Kong in El Niño years, Presented at the 12th Guangdong-Hong Kong-Macau Seminar on Hazardous Weather, Hong Kong, China, 15–17 January 1998, Hong Kong Observatory Reprint No. 284. (in Chinese).
Champely, S., 2007: pwr: Basic functions for power analysis. R package version 1.1.
Chang, W. L., 1999: Some impacts of El Niño and La Niña events on the weather of Hong Kong, Presented at the Workshop on the Impact of the El Niño Southern Oscillation (ENSO)/La Niña on Meteorology and Hydrology in the Typhoon Committee Area, Macau, 29 June–1 July 1999. Hong Kong Observatory Reprint No. 310.
—, and K. H. Yeung, 2003: Seasonal Forecasting for Hong Kong-A Pilot Study. Hong Kong Observatory Technical Note No. 104.
Cohen, Jacob, 1988: Statistical Power Analysis for the Behavioral Sciences. Lawrence Erlbaum Associates, Inc.
Conover, W. J., 1999: Practical Nonparametric Statistics. John Wiley & Sons, Inc.
Hoar Tim and Doug Nychka, 2008: Statistically downscaling of the Community Climate System Model (CCSM) monthly temperature and precipitation projections. IMAGe/NCAR White Paper, http://www.gisclimatechange.org/Downscaling.pdf.
Kalnay, E., and Coauthors, 1996: The NCEP/NCAR reanalysis 40-year project. Bull. Amer. Meteor. Soc., 77, 437–471.
Lam, C. Y., 1993: El Niño / Southern Oscillation and spring weather in Hong Kong. Bull. H. K. Meteor. Soc., 3(1), 3–13.
Leung, Y. K., and W. M. Leung, 2002: Effect of ENSO on number of tropical cyclones affecting Hong Kong. Bull. H. K. Meteor. Soc., 12(1/2), Hong Kong Observatory Reprint No. 453.
—, and M. C. Wu, 2004: The effect of ENSO and East Asian monsoon on the annual rainfall in Hong Kong, China, Presented at the Sixth Joint Meeting of Seasonal Prediction on East Asian Summer Monsoon, Guilin, China, 11–13 May 2004. Hong Kong Observatory Reprint No. 542.
Li X., and P. Zhai, 2000: On indices and indicators of ENSO episodes. Acta Meteor. Sinica, 58, 102–109. (in Chinese)
—, —, and F. Ren, 2005: Redefining ENSO episode on changed reference, J. Tropical Meteor., 21(1), 72–78. (in Chinese)
Murphy, Kevin R., and Brett Myors, 2004: Statistical Power Analysis. Lawrence Erlbaum Associates, Inc.
R Development Core Team, 2008: R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www.R-project.org.
Storch, Hans von, and Francis W. Zwiers, 2003: Statistical Analysis in Climate Research. Cambridge University Press.
Wang, B., R. Wu, and X. Fu, 2000: Pacific-East Asian teleconnection: How does ENSO affect East Asian climate? J. Climate, 13(9), 1517–1536.
—, and J. C. L. Chan, 2002: How strong ENSO events affect tropical storm activity over the western North Pacific. J. Climate, 15(13), 1643–1658.
—, and Q. Zhang, 2002: Pacific-East Asian teleconnection. Part II: How the Philippine Sea anomalous anticyclone is established during El Niño development. J. Climate, 15(22), 3252–3265.
Wilks, Daniel S., 2006: Statistical Methods in the Atmospheric Sciences. Elsevier Inc.
Wu, M. C., and W. H. Leung, 2008: Effect of ENSO on winter monsoon affecting Hong Kong, The 4th WMO International Workshop on Monsoons, Beijing, China, 20–25 October 2008. Hong Kong Observatory Reprint No. 789.
Zhang, R., A. Sumi, and M. Kimoto, 1996: Impact of El Niño on the East Asian monsoon: A diagnostic study of the’ 86/87 and’ 91/92 events. J. Meteor. Soc. Japan, 74(1), 49–62.
—, and —, 2002: Moisture circulation over East Asia during El Niño episode in northern winter, spring and autumn. J. Meteor. Soc. Japan, 80(2), 213–227.
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Lee, Sm., Cheng, Yl. An examination of ENSO’s effect on the monthly and seasonal climate of Hong Kong from a statistical perspective. Acta Meteorol Sin 25, 34–50 (2011). https://doi.org/10.1007/s13351-011-0003-1
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DOI: https://doi.org/10.1007/s13351-011-0003-1