SACOL黑碳和沙尘气溶胶辐射强迫分析  

Analysis of radiative forcing of black carbon and dust aerosol over SACOL

作　　者：衣娜娜 张镭[1] 曹贤洁[1] 梁捷宁[1] 田鹏飞[1] 李燕军[1] 

机构地区：[1]兰州大学大气科学学院,半干旱气候变化教育部重点实验室,兰州730000

出　　处：《兰州大学学报（自然科学版）》2015年第3期381-387,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(41371220;41272246)

摘　　要：利用兰州大学半干旱气候与环境观测站(SACOL)的太阳光度计资料、AREONET气溶胶光学特性资料,采用辐射传输模式SBDART分析了SACOL典型日个例沙尘气溶胶和黑碳气溶胶的长、短波辐射强迫,探讨了不同地表反照率和天顶角对气溶胶辐射强迫的影响.分析表明,沙尘和黑碳在地表的短波辐射强迫分别是-146.54,-60 W/m^2,长波辐射强迫分别是17.79,8.66 W/m^2,短波辐射强迫是长波的6倍多,沙尘辐射强迫是黑碳的2倍多;在大气层顶沙尘和黑碳短波辐射强迫是39.04,27.2 W/m^2,长波辐射强迫为12.19,5.0 W/m^2.短波辐射强迫随地表反照率的增加而增大,长波辐射强迫随地表反照率的增加线性减小.随天顶角减小,大气层顶的短波辐射强迫线性增加,地面短波辐射强迫对数减小,长波辐射强迫随天顶角的变化很小.The data of a sun photometer at SACOL,the aerosol data of AERONET and the radiative transfer model SBDART were used to analyze the short wave and long wave radiative forcing of black carbon and dust aerosol over SACOL,and the effects of different surface albedos and solar zenith angles on radiative forcing.The results show that the short wave radiative forcing of dust aerosol and black carbon on the surface was-146.54,-60 W/m^2,and the long wave radiative foring of dust aerosol and black carbon was 17.79,8.66 W/m^2,the short wave radiative forcing of black carbon and dust aerosol on the surface was more than six times that of long wave radiative forcing,and the radiative forcing of dust aerosol was twice more than black carbon;the short wave radiative forcing of dust aerosol and black carbon at the top of atmospheres was 39.04,27.2 W/m^2 respectively,and the long wave radiative foring was 12.19,5.0 W/m^2.It was also pointed out that the short radiative foring due to dust aerosol and black carbon aerosol increased linearly with the surface albedo,while the long wave radiative forcing represented an opposite correlationship.Meanwhile,the short radiative forcing linearly increased at the top of atmospheres,while on the surface it appeared logarithmical with the decreasing of the zenith angle.

关 键 词：大气气溶胶 黑碳 沙尘 辐射强迫 SBDART 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]