Study on Pollen Concentration Change Rule and Forecast Method in Nanjing City
Based on the pollen observation and weather data, the pollen season and day change rules and seasonal distribution characteristic of different spices pollen in Nanjing region were analyzed. The results showed that the pollen was distributed in a single apex with distinctive periodical and seasonal characteristics in Nanjing. And the pollen increased rapidly since mid-March and reached the peak in mid-April, but then decreased slowly with big fluctuations. Weather factors of the same period, such as temperature, humidity, rainfall and wind speed were studied to examine their influences on the pollen concentration change. Pollen concentration forecast equation was set up: Y = 0.703 X1 +0.005 X2 + 0.005 X3 + 0.452. In the equation, Y was the pollen concentration forecast value, X1 was the actual value of pollen of the previous day. X1 was the air pressure difference. X3, was the temperature difference.
国家科技期刊平台
NSTL
万方数据
维普
