Abstract: Based on the oxygen anion concentration data from 2010 to 2011 in Ningbo, its distribution and the relationship with meteorological elements were analyzed. A forecasting model of oxygen anion concentration was established by a stepwise regression analysis method. The results show that the oxygen anion concentration is lower near the urban center and higher at suburb in Ningbo; it is higher at nighttime and in early morning and lower at daytime; it is higher in summer and lower in winter. Therefore it suggests that people should go touring in the early morning or evening at suburb. It is better to avoid fog or haze weather with serious air pollution. The oxygen anion concentration is in a negative correlation with air temperature and PM₁₀, and in a positive correlation with relative humidity, thunderstorm and lightning, so it is better to take a trip on a clear day after thunder shower. The model could quantitatively predict the oxygen anion concentration in Ningbo, which is important to tourism meteorology service.

Key words: font-family: "Times New Roman", mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, Negative oxygen ion concentration')">mso-fareast-font-family: 宋体">Negative oxygen ion concentration, Meteorological elements, Tourism meteorology service