呼和浩特市温室气体浓度变化特征及与气象因子的关系

CONCENTRATION VARIATION CHARACTERISTICS OF MAIN GREENHOUSE GASES AND THE RELATION WITH METEOROLOGICAL ELEMENTS IN HOHHOT

利用呼和浩特市2013年至2017年2种主要温室气体(CO_2和CH_4)的观测数据及同期气象要素观测数据,分析了2种温室气体的平均浓度的日、月、季变化规律及与气象要素的相关分析。结果表明:呼和浩特市的温室气体浓度低于全球水平。CO_2和CH_4呈现较为明显的日变化,两者的最小值均出现在午后15:00左右,最大值出现时间有所差异。不同季节的CO_2和CH_4浓度的日变化规律不尽相同。CO_2月均值最小出现在7月份,CH_4月均值最小出现在4月份,两者最大值均出现在1月份。CO_2浓度冬季最高而CH_4浓度在秋季最高,CO_2浓度夏季最小而CH_4浓度在春季最小。CO_2与气温具有明显的负相关,CH_4与日照时数具有负相关。

By using the observational data of main greenhouse gases and meteorological data from 2013 to 2017, the daily, monthly and seasonal variations of the average concentrations of greenhouse gases and their correlation with meteorological elements were analyzed. The concentration of greenhouse gases in Hohhot is below the global level. The concentration of CO2 and CH4 showed obvious diurnal variation. The minimum values of both appeared at about 15:00 in the afternoon, and the maximum appeared at different times. Diurnal variation of concentration is different in different seasons. The minimum monthly mean of CO2 appeared in July, and the minimum monthly mean of CH4 appeared in April, and the maximum of both appeared in January. CO2 concentration is highest in winter and CH4 concentration is highest in autumn. CO2 concentration is lowest in summer and CH4 concentration is lowest in spring. CO2 was negative correlated with temperature. CH4 was negative correlated with sunshine hours.