干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区沙尘气溶胶光学和微物理特性

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	黄土高原半干旱区沙尘气溶胶光学和微物理特性
其他题名	The Optical and Microphysical Characteristics of Dust Aerosol over a Typical Semi- arid Region in Loess Plateau
	史莹莹 1; 张镭 2; 田鹏飞 2; 刘慧 2; 马强 3
来源期刊	高原气象
ISSN	1000-0534
出版年	2018
卷号	37 期号:1 页码:286-295
中文摘要	利用2006-2012年兰州大学半干旱气候与环境观测站太阳光度计资料,采用严格判断方法确定出沙尘气溶胶数据,分析沙尘气溶胶的光学和微物理特性。结果表明,沙尘气溶胶光学厚度最大值(2.80)出现在春季,主要分布在0.3~ 0.8,日均值0.63。Angstrom波长指数与光学厚度位相相反,春季最小(0.002),秋季最大(0.525),主要分布在0.2~ 0.4,日均值0.27。沙尘多为大粒径气溶胶,粒子谱粗模态占主导。总粒子和粗模态粒子体积浓度变化很大,与光学厚度年变化一致,在4月达到最大。有效半径与复折射指数实部变化一致,春、冬季较大,夏、秋季较小。单次散射反照率冬、春小,夏、秋较大,最小值出现在2月,与复折射指数虚部反位相。
英文摘要	Atmospheric aerosols regulate the balance of radiation budgets of the surface and atmosphere through direct,indirect and semi-direct effects,which affect regional and global climate change. In order to evaluate the aerosol radiation effects accurately,it is necessary to have a good understanding of aerosol optical and microphysical characteristics. At present,there is no sufficient understanding of the aerosol optical and microphysical characteristics over the typical semi-arid region in Loess Plateau. Based on the 2006-07-28 to 2012-08-10 sun photometer data from the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL),dust aerosol was determined by using a strict judgment,and then dust aerosol optical and microphysical characteristics were analyzed. The work has important scientific significance and application value. The main results are as follows: Spring has the highest (2.80) dust aerosol optical depth (AOD),which is mainly distributed from 0.3 to 0.8 (about 82%),with a daily average of 0.630.44,indicating that the largest number of dust days occur in spring. Angstrom exponent with maximum and minimum in spring (0.002) and autumn (0.525), which is opposite in phase to AOD,ranges between 0.2~0.4 (about 56%) and has a daily average of 0.27 0.12,showing that dust aerosols are mainly large particle size. The coarse mode dominates the size distribution of the dust aerosol,and the spring concentration is the largest. Both total and coarse mode volume concentrations have similar annual variation to AOD and reach their maximum in April with the fine mode volume concentration changing very little. The aerosol total and coarse mode effective radius ranges from its maximum in spring to its minimum in autumn,and the amplitude of the fine mode particles is small. The real part of the refractive index with the change of the effective radius is higher in spring and winter while it’s lower in summer and autumn,which indicates that dust aerosol has strong scattering. In opposite phase to imaginary part of refraction index,the single scattering albedo is larger in spring,but has a minimum value in February,so dust aerosol absorption is weaker than black carbon aerosol. The asymmetry factor reaches its minimum in spring,which indicates that dust aerosol has stronger forward scattering than other kinds of aerosols.
中文关键词	沙尘气溶胶 ; 光学厚度 ; 波长指数
英文关键词	SACOL Dust aerosol SACOL AOD angstrom exponent
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6198183
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237751
作者单位	1.兰州大学大气科学学院;;94188部队, 半干旱气候变化教育部重点实验室;;, 兰州;;西安, 甘肃;;陕西 730000;;710000, 中国; 2.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, 甘肃 730000, 中国; 3.94188部队, 西安, 陕西 710000, 中国
推荐引用方式 GB/T 7714	史莹莹,张镭,田鹏飞,等. 黄土高原半干旱区沙尘气溶胶光学和微物理特性[J]. 兰州大学,2018,37(1):286-295.
APA	史莹莹,张镭,田鹏飞,刘慧,&马强.(2018).黄土高原半干旱区沙尘气溶胶光学和微物理特性.高原气象,37(1),286-295.
MLA	史莹莹,et al."黄土高原半干旱区沙尘气溶胶光学和微物理特性".高原气象 37.1(2018):286-295.