青海格尔木地区大气气溶胶分布的飞机观测  

Aircraft Measurements of Distribution of Aerosol over Golmud in Qinghai Province

作　　者：王启花 张鹏亮 王丽霞 马学谦 刘娜 颜海前 龚静 WANG Qihua;ZHANG Pengliang;WANG Lixia;MA Xueqian;LIU Na;YAN Haiqian;GONG Jing(Qinghai Meteorological Disaster Prevention Technology Center,Xining 810001,China)

机构地区：[1]青海省气象灾害防御技术中心,青海西宁810001

出　　处：《干旱气象》2021年第4期603-609,共7页Journal of Arid Meteorology

基　　金：国家自然科学基金(41705121);青海省自然科学基金(2017-ZJ-944Q)共同资助。

摘　　要：利用2011年和2013年青海格尔木地区机载DMT仪器观测的气溶胶资料,对气溶胶粒子数浓度及气溶胶数谱分布特征进行分析。结果表明,格尔木低层主要为局地气溶胶,高层为输入型气溶胶;气溶胶数浓度随高度升高呈减小趋势,且各高度层气溶胶数浓度均小于500 cm^(-3);气溶胶粒子有效粒径随高度升高先增大后减小,3500~5000 m气溶胶有效粒径最大;气溶胶数谱呈多峰分布。对格尔木第1模态(0.1~0.2μm)、第2模态(0.2~1μm)和第3模态(1~3μm)的气溶胶数谱进行对数正态拟合,发现气溶胶数谱谱宽第2模态>第1模态>第3模态,其与北京、天津拟合的谱宽分布特征存在差异;对比格尔木与北京和天津地区相同模态的气溶胶数谱发现,气溶胶第1模态数谱谱宽天津最宽、北京最窄,第2模态格尔木最宽、北京最窄,气溶胶粒子平均粒径在第1模态和第2模态北京均最大,格尔木均最小。Based on observed aerosol data detected by the airborne DMT instruments in 2011 and 2013 in Golmud,the distribution characteristic of aerosol number concentration and the number spectrum were analyzed.The results show that it was mainly affected by local aerosol in the lower layer,while it was mainly affected by long-range transport aerosol in the upper layer.The aerosol number concentration decreased with increasing altitude,and it was less than 500 cm^(-3)in each layer.The effective particle size increased firstly and then decreased with increasing altitude,the maximum value of effective particle size appeared at a height of 3500 to 5000 m,the aerosol number spectrum presented multi-peak distribution.The log-normal fitting was used to fit the number spectrum of aerosol in three modes,the results showed that aerosol number spectrum width of the second mode(0.2-1μm)was widest,followed by the third mode(1-3μm),the first mode(0.1-0.2μm)was narrowest.The aerosol number spectrums of the same mode in Golmud,Beijing and Tianjin were compared and found that the aerosol number spectrum width was widest in Tianjin and narrowest in Golmud in the first mode,and widest in Golmud and narrowest in Beijing in the second mode.The mean diameter of aerosol particles in the first mode and the second mode was largest in Beijing and smallest in Golmud.

关 键 词：气溶胶 飞机观测 对数正态拟合 多模态 

分 类 号：P412.24[天文地球—大气科学及气象学]