Synoptic typing and its application to the assessment of climatic impact on concentrations of sulfur dioxide and nitrogen oxides in Hong Kong

Abstract Principal components analysis and average linkage clustering procedure are used to automatically classify seasonal distinctive synoptic categories based on 6-hourly surface meteorological data for Hong Kong. This procedure is able to identify the specific categories exhibiting particularly high mean pollution concentrations and producing high frequency of severe pollution events. It is found that high SO2 and NOx concentrations are usually associated with the certain spring and summer air masses with moderate to strong southwesterly or westerly winds as well as related to the autumn and winter synoptic categories with light northerly or easterly winds. This procedure has a potential to forecast air pollution concentrations, which could be achieved through predicting the arrival of the most polluted synoptic categories.

[1]  L. Kalkstein,et al.  An Evaluation of Three Clustering Procedures for Use in Synoptic Climatological Classification , 1987 .

[2]  Jerry M. Davis,et al.  An Automated Classification Scheme Designed to Better Elucidate the Dependence of Ozone on Meteorology , 1994 .

[3]  Robert F. Cahalan,et al.  Sampling Errors in the Estimation of Empirical Orthogonal Functions , 1982 .

[4]  Scott M. Robeson,et al.  Evaluation and comparison of statistical forecast models for daily maximum ozone concentrations , 1990 .

[5]  G. McGregor,et al.  Synoptic typing and its application to the investigation of weather air pollution relationships, Birmingham, United Kingdom , 1995 .

[6]  L. Kalkstein,et al.  A Synoptic Climatological Approach For Geographical Analysis: Assessment of Sulfur Dioxide Concentrations , 1986 .

[7]  J. Scott Greene,et al.  A NEW SPATIAL SYNOPTIC CLASSIFICATION: APPLICATION TO AIR-MASS ANALYSIS , 1996 .

[8]  J. Meagher,et al.  The correlation of temperature and rural ozone levels in southeastern U.S.A. , 1997 .

[9]  L. Kalkstein,et al.  The Philadelphia Hot Weather–Health Watch/Warning System: Development and Application, Summer 1995 , 1996 .

[10]  G. Kallos,et al.  Synoptic and mesoscale weather conditions during air pollution episodes in Athens, Greece , 1993 .

[11]  Christos Zerefos,et al.  Forecasting peak pollutant levels from meteorological variables , 1995 .

[12]  D. K. Pissimanis,et al.  On the meteorological conditions during some strong smoke episodes in Athens , 1991 .

[13]  Koji Suzuki,et al.  A long-term study of atmospheric ammonia and particulate ammonium concentrations in Yokohama, Japan , 1995 .

[14]  L. Kalkstein,et al.  A new approach to evaluate the impact of climate on human mortality. , 1991, Environmental health perspectives.

[15]  Kin-che Lam,et al.  An analysis of winds affecting air pollution concentrations in Hong Kong , 1998 .