摘要
利用2012—2020年北京地区每年3月1日至9月30日12个站点的逐日花粉浓度观测资料,分析了花粉浓度的变化特点及其时空分布特征。结果表明:北京地区花粉浓度在春季花粉期(3—5月)和夏秋季花粉期(8—9月)会出现两次峰值。全市平均的春季花粉期花粉浓度峰值是夏秋季的3.3倍;75%站点的花粉浓度在研究期间呈现增加趋势。花粉间歇期(6—7月)花粉浓度较低,花粉浓度的增加趋势也较小。春季花粉期和夏秋季花粉期花粉浓度较高,花粉的增加趋势也更为明显;研究期间日平均气温、日平均相对湿度以及日总降水量与花粉浓度呈负相关关系,日平均风速和日平均气压与花粉浓度呈正相关关系,且该结论在12个区域内表现一致。但将春季花粉期、夏秋季花粉期、受天气影响的典型花粉浓度变化过程中的花粉浓度与气象因素的相关关系分别进行分析,则只有风速、湿度、降水量与花粉浓度呈稳定一致的相关关系,气温、气压与花粉浓度在不同时期内的相关关系较为复杂,甚至会完全相反。
Using daily pollen concentration samples from 12 stations in Beijing during March 1 to September 30,from 2012 to 2020,spatial-temporal distribution characteristic of pollen concentration was analyzed.The results show that there are two peaks of pollen concentration with one in the spring pollen period(March-May)and the other in the summer-autumn pollen period(Autumn-September).The pollen concentration peak in spring is 3.3 times higher than that in summer and autumn.Pollen concentrations of 75%stations show an increasing trend during the studied period.The pollen concentration is lower during the intermittent period with its unobvious increasing trend.While in spring and summer-autumn,pollen concentration is higher with its obvious increasing trend.As a whole,daily average temperature,daily average relative humidity,and total daily precipitation are negatively correlated with pollen concentration.This result is consistent among the 12 stations.In addition,there is a stable correlation between wind speed,humidity,rainfall,and pollen concentration.However,the correlations between temperature,air pressure,and pollen concentration in different periods are more complicated,or even opposite.
作者
姜江
乔媛
任成英
蒋志
尤焕苓
叶彩华
JIANG Jiang;QIAO Yuan;REN Chengying;JIANG Zhi;YOU Huanling;YE Caihua(Beijing Meteorological Service Center,Beijing 100081,China;Beijing Tianyi Technology,Beijing 100089,China)
出处
《气象与环境学报》
2023年第5期91-98,共8页
Journal of Meteorology and Environment
基金
北京市科技计划课题(Z191100009119013)资助。
关键词
花粉期
花粉浓度
气象因素
Observed period of pollen
Pollen concentration
Meteorological factors
