Annual Report 2012 - City University of Hong Kong

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Figure 26. Precipitation of (a) June 2010 (mm), (b) long-term mean condition (1981-2010, mm), (c) precipitation anomaly of 2010, and (d) precipitation anomaly percentage of 2010. Reference: Yuan, F., W. Chen and W. Zhou, 2012: Analysis of the role played by circulation in the persistent precipitation over South China in June 2010. Adv. Atmos. Sci. 29, 769-781 D5.2 Hydrometeorological extremes over the Korean peninsula Recent studies that characterize central tropical Pacific warming (often referred to as El Niño Modoki) and its teleconnections to East Asia show coherent teleconnection patterns during boreal summer. Observed increases in the frequency of El Niño Modoki and a lack of understanding regarding its impacts on precipitation over the Korean Peninsula motivate our work. In this study, we investigate the regional precipitation patterns over South Korea associated with El Niño and El Niño Modoki events during the June-September season. The results show significant and consistent increases in the seasonal precipitation totals and The analysis presented here provides an improved understanding of the potential impacts of the tropical Pacific sea surface temperature on warm-season (June- September) water availability and hydrometeorological extremes over the Korean Peninsula. 29
30 maximum precipitation as well as extreme rainy days during the decay of El Niño Modoki. In contrast, moisture flux into South Korea is weaker in the case of the eastern Pacific El Niño (See Figure 27). For more details, please refer to Kim et al. (2012). Figure 27. Empirical probability density function for the seasonal rainfall composite anomalies (June-September) for the five major river basins in South Korea. The red line indicates the distribution of seasonal rainfall anomalies during the canonical El Niño. The blue line shows precipitation variability during ENSO Modoki events. In each figure, symbols on the bottom line represent rainfall anomalies corresponding to El Niño years (red circles) and ENSO Modoki years (blue triangles). Reference: Kim, J. S., W. Zhou, X. Wang, and Shaleen Jain, 2012: El Niño modoki and the summer precipitation variability over South Korea: A diagnostic study. J. Meteor. Soc. Japan. 90, 673-684. Doi: 10.2151/jmsj.2012-507 D5.3 Local air quality Results shows that significantly negative correlations were found when Niño 3 led particulate matter ≤10 μm PM 10) and NO 2 by 2–3 months over the Hong Kong territory, while the other pollutants (e.g., O 3, SO 2) showed modest correlations. A significant decreasing trend in visibility was observed during the autumn and winter, which has potential implications for the air-quality degradation and the endangerment of human health in Hong Kong. In an El Niño summer, the visibility was relatively better, This study presents an exploratory analysis aimed at improving understanding of the variability of Hong Kong air quality associated with different climate conditions.
Page 1 and 2: Guy Carpenter Asia-Pacific Climate
Page 3 and 4: Contents 1 Executive Summary 5 I. I
Page 5 and 6: 6 (i.e. Exp2). (c) is the differenc
Page 7 and 8: 8 Reference: Liu, K. S. and J. C. L
Page 9 and 10: 10 A3.3 Effects of Pacific-Japan te
Page 11 and 12: 12 B1.2 Comparison of the moisture
Page 13 and 14: 14 amplification in summer. There a
Page 15 and 16: 16 Reference: Cheung, H. N., W. Zho
Page 17 and 18: 18 C2. Development of a multi-model
Page 19 and 20: 20 precipitation and evapotranspira
Page 21 and 22: 22 Reference: Huang WR, Chan JCL, A
Page 23 and 24: 24 D2. Black carbon source identifi
Page 25 and 26: 26 mixing state and size distributi
Page 27: 28 Figure 24. Comparison of the DAS
Page 31 and 32: 32 D6. Climatic impacts from the ch
Page 33 and 34: 34 Publications Journal Papers Au-Y
Page 35 and 36: 36 Staff list Director Prof. Johnny

Annual Report 2012 - City University of Hong Kong

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