| 利用激光雷达观测兰州沙尘气溶胶辐射特性 |
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| 引用本文： | 曹贤洁,张镭,周碧,鲍婧,史晋森,闭建荣.利用激光雷达观测兰州沙尘气溶胶辐射特性[J].高原气象,2009,28(5):1115-1120. |
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| 作者姓名： | 曹贤洁 张镭 周碧 鲍婧 史晋森 闭建荣 |
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| 作者单位： | 半干旱气候变化教育部重点实验室,兰州大学,大气科学学院,甘肃,兰州,730000;甘肃省干旱气候变化与减灾重点实验室,甘肃,兰州,730020 |
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| 基金项目： | 国家自然科学基金，干旱气象科学研究基金 |
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| 摘 要： | 利用微脉冲激光雷达CE370-2与太阳光度计CE-318， 在兰州观测分析了2007年3月27~29日扬沙过程沙尘气溶胶辐射特性， 并利用HYSPLIT-4模式分析了沙尘过程气溶胶粒子的后向轨迹。分析表明， 此沙尘过程气溶胶粒子的传输路径主要有两条： 一条起源于青海西北经西宁抵兰州， 另一条起源于塔克拉玛干沙漠经河西走廊抵兰州； 沙尘气溶胶主要集中于离地1.5 km高度层内； 沙尘气溶胶消光系数随高度先增加， 到0.2 km左右高度达到最大， 然后急剧减小。沙尘气溶胶光学厚度的时间演变呈双峰型， 最高峰出现在28日12:00， 次高峰在27日22:00。验证表明由CE370-2得到的气溶胶光学厚度与CE-318得到的很接近； 雷达观测资料的处理方法可以较好地反演气溶胶消光系数和光学厚度。
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| 关 键 词： | 兰州 沙尘气溶胶 激光雷达 太阳光度计 消光系数 光学厚度 Hysplit |
Lidar Measurement of Dust Aerosol Radiative Property over Lanzhou |
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| CAO Xian-jie,ZHANG Lei,ZHOU Bi,BAO Jing,SHI Jin-sen,BI Jian-rong.Lidar Measurement of Dust Aerosol Radiative Property over Lanzhou[J].Plateau Meteorology,2009,28(5):1115-1120. |
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| Authors: | CAO Xian-jie ZHANG Lei ZHOU Bi BAO Jing SHI Jin-sen BI Jian-rong |
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| Abstract: | The radiative properties of dust aerosol were analyzed through a blowing dust event happened over Lanzhou on March 27～29, 2007 using the micropulse lidar CE370-2 and the sun photometer CE-318. The lidar data processing method was mainly based on the Fernald algorithm and Klett algorithm. The analyses showed that it had two transport paths of the aerosol particles in the dust event computed from the HYSPLIT-4 model, of which the first was originated in the northwestern area of Qinghai Province and then arrived in Lanzhou via Xinin and the other was originated in Taklimakan Desert and then arrived in Lanzhou via Hexi Corridor; the dust aerosol was mainly concentrated in the layer below 1.5 km in height, and the dust aerosol extinction coefficient increased with height, till reached the maximum value at about 0.2 km, then it decreased rapidly. As to the temporal evolution of dust aerosol optical depth (AOD) property, it had bi-peaks, of which the peak appeared at 12:00 of Mar. 28 and the sub-peak was at 22:00 on March 27. Finally the validation showed that the AOD retrieved from CE370-2 was very close to that from CE-318, and the lidar data processing method performed well in the retrieval of aerosol extinction coefficient and AOD. |
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| Keywords: | Hysplit Lanzhou Dust aerosol Lidar Sun photometer Extinction coefficient AOD Hysplit |
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