气候变化领域集成服务门户(CCPortal): Tibetan Plateau Impacts on Global Dust Transport in the Upper Troposphere

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DOI	10.1175/JCLI-D-17-0313.1
	Tibetan Plateau Impacts on Global Dust Transport in the Upper Troposphere
	Xu, Chao; Ma, Yaoming; Yang, Kun; You, Chao
通讯作者	Xu, C ; Ma, YM (通讯作者)
发表日期	2018
ISSN	0894-8755
EISSN	1520-0442
起始页码	4745
结束页码	4756
卷号	31 期号:12
英文摘要	Dust is a major component of atmospheric aerosol worldwide, greatly affecting regional and global climate. In this study dust aerosol optical depth (DAOD) and dust mass fluxes(DMF) were evaluated at different altitudes using measurements by the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and ERA-Interim data from March through May (MAM) for the period 2007-16. Significantly higher uppertropospheric (above similar to 8 km) dust loads and DMF downstream of the Tibetan Plateau (TP) relative to those over other major dust sources of the Northern Hemisphere were found during spring. A DMF magnitude of 10(10) g integrated across a 28-latitude segment during spring was estimated downstream of the TP in the upper troposphere. A dust belt can be clearly seen at altitudes higher than 6 km over the downwind direction of the TP at latitudes of around 30 degrees-40 degrees N, crossing the Pacific Ocean and extending to North America during spring. Apathway for transporting dust aerosols into the upper troposphere is proposed, as follows. Dust is uplifted to the midtroposphere over the source regions; then, frequent, deep, dry convection prevailing over the TP during spring can cause convective overshooting that uplifts the dust aerosols to the upper troposphere. The TP thus acts as a channel for transporting dust from the lower atmosphere to the upper troposphere, enabling the long-range zonal transport of dust around the Northern Hemisphere.
关键词	INDIAN-SUMMER MONSOON AEROSOL OPTICAL DEPTH HETEROGENEOUS LANDSCAPE MINERAL DUST ASIAN DUST NORTH-AFRICA MIDDLE-EAST SATELLITE DISTRIBUTIONS CLIMATE
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000450688200009
来源期刊	JOURNAL OF CLIMATE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259125
推荐引用方式 GB/T 7714	Xu, Chao,Ma, Yaoming,Yang, Kun,et al. Tibetan Plateau Impacts on Global Dust Transport in the Upper Troposphere[J]. 中国科学院青藏高原研究所,2018,31(12).
APA	Xu, Chao,Ma, Yaoming,Yang, Kun,&You, Chao.(2018).Tibetan Plateau Impacts on Global Dust Transport in the Upper Troposphere.JOURNAL OF CLIMATE,31(12).
MLA	Xu, Chao,et al."Tibetan Plateau Impacts on Global Dust Transport in the Upper Troposphere".JOURNAL OF CLIMATE 31.12(2018).