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	东亚高空大气气溶胶的分布及沙尘输送特征研究
其他题名	Study on the Distribution of Upper Air Aerosols and the Transport of Dust over East Asia
	钱胜利; 李成才; 张庆红
来源期刊	北京大学学报. 自然科学版
ISSN	0479-8023
出版年	2010
卷号	46 期号:4 页码:547-554
中文摘要	利用长达20年的SAGE II(stratospheric aerosol and gasexperimentII)资料,研究了东亚地区5.0～15.0km高空气溶胶多年时空分布特征和变化趋势,并研究了东亚沙尘活动对高空及下游的气溶胶输送。发现东亚高空气溶胶水平分布呈现上中下3层不同的分布特征,下层5.0～8.5km高值区对应气溶胶源区青藏高原和西北沙漠地区;中层9.0～10.0km高值区对应温带气旋高发的中纬度地区;上层10.5～15.0km表现为低纬气溶胶含量显著高于高纬地区。高空各层气溶胶的空间分布受天气系统的影响具有明显的季节变化。近10年来东亚高空气溶胶呈减少趋势,平均光学厚度约下降了0.016。另外还发现沙尘活动与5.0～11.5km范围内的气溶胶显著相关,反映沙尘活动影响的高度范围可以达到整个对流层。定义沙尘暴高空影响指数,用来分析东亚沙尘暴对下游地区的影响,发现随着时间推移沙尘逐渐向东移动,在约12天之后可以到达大西洋。
英文摘要	SAGE II(stratospheric aerosol and gas experimentII) data extending as long as 20 years was used to study both the spatial and temporal distributions and the trend of column aerosol between 5.0 and 15.0 km over East Asia.The transport of aerosol to the upper level and downstream areas by dust activities was also studied.It’s found that there are three different kinds of horizontal distributions.In the low level of 5.0-8.5 km,the high-value area is just above the dust source of aerosol,e.g.Tibetan Plateau,deserts in the northwest of China;in the middle level of 9.0 -10.0 km,the high-value area is consistent with the area with high extratropical cyclone frequency;in the high level of 10.5 -15.0 km,the value in low-latitude is significantly higher than that in high-latitude.Upper level aerosol distributions in all the three levels significantly vary seasonally resulting from different synoptic systems.A downward trend of upper air aerosol is found in recent ten years over East Asia and the aerosol optical depth(AOD) between 5.0 and 15.0 km has decreased by 0.016.It is also found that aerosol between 5.0 and 11.5 km has significant positive correlation with the dust storm activity,which infers the injection of surface dust to all the altitude in troposphere.Upper-air-effect-index of dust storm was defined to study the impact of dust storms in East Asia on the downstream areas.The movement of dust towards the east was observed;and the dust could reach the Atlantic Ocean in about 12 days.
中文关键词	气溶胶 ; 沙尘暴
英文关键词	SAGEII aerosol SAGE II dust storm
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:3903572
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224685
作者单位	北京大学物理学院大气科学系, 北京 100871, 中国
推荐引用方式 GB/T 7714	钱胜利,李成才,张庆红. 东亚高空大气气溶胶的分布及沙尘输送特征研究[J]. 北京大学,2010,46(4):547-554.
APA	钱胜利,李成才,&张庆红.(2010).东亚高空大气气溶胶的分布及沙尘输送特征研究.北京大学学报. 自然科学版,46(4),547-554.
MLA	钱胜利,et al."东亚高空大气气溶胶的分布及沙尘输送特征研究".北京大学学报. 自然科学版 46.4(2010):547-554.