干旱区生态环境知识资源中心(Arid): Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors

Arid

DOI	10.5194/acp-21-5253-2021
	Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors
	Che, Junhui; Zhao, Ping
通讯作者	Zhao, P (corresponding author), Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China. ; Zhao, P (corresponding author), Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China.
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2021
卷号	21 期号:7 页码:5253-5268
英文摘要	The important roles of the Tibetan Plateau (TP) atmospheric boundary layer (ABL) in climate, weather, and air quality have long been recognized, but little is known about the TP ABL climatological features and their west-east discrepancies due to the scarce data in the western TP. Based on observational datasets of intensive sounding, surface sensible heat flux, solar radiation, and soil moisture from the Third Tibetan Plateau Atmospheric Scientific Experiment (TIPEX-III) and the routine meteorological-operational-sounding and ground-based cloud cover datasets in the Tibetan Plateau for the period 2013-2015, we investigate the west-east differences in summer ABL features over the TP and the associated influential factors for the first time. It is found that the heights of both the convective boundary layer (CBL) and the neutral boundary layer (NBL) exhibit a diurnal variation and a west-east difference in the TP, while these features are not remarkable for the stable boundary layer (SBL). Moreover, the ABL shows significant discrepancies in the amplitude of the diurnal variation and the persistent time of the development between the eastern and western TP. In the early morning (08:00 BJT, Beijing time), the ABL height distribution is narrow, with a mean height below 450 m a.g.l. (above ground level) and a small west-east difference. The SBL observed at this moment accounts for 85% of the total TP ABL. There is a wide distribution in the ABL height up to 4000 m a.g.l. and a large west-east difference for the total ABL height at noon (14:00 BJT), with a mean height above 2000 m a.g.l. in the western TP and around 1500 m a.g.l. in the eastern TP. The CBL accounts for 77% of the total TP ABL at this moment, with more than 50% of the CBL above 1900 m a.g.l. In the late afternoon (20:00 BJT), the CBL and SBL dominate the western and eastern TP, respectively, which results in a larger west-east difference of 1054.2 m between the western and eastern TP. The high ABL height in a cold environment over the western TP (relative to the plain areas) is similar to that in some extreme hot and arid areas such as Dunhuang and Taklimakan deserts. In general, for the western (eastern) TP, there is low (high) total cloud coverage, with large (small) solar radiation at the surface and dry (wet) soil. These features lead to high (low) sensible heat flux and thus promote (inhibit) the local ABL development. This study provides new insights for west-east structures of the summer ABL height, occurrence frequency, and diurnal amplitude over the TP region and the associated reasons.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000638133200001
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349624
作者单位	[Che, Junhui; Zhao, Ping] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China; [Che, Junhui; Zhao, Ping] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China; [Che, Junhui] Shandong Meteorol Serv Ctr, Jinan 250031, Peoples R China
推荐引用方式 GB/T 7714	Che, Junhui,Zhao, Ping. Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors[J]. 南京信息工程大学,2021,21(7):5253-5268.
APA	Che, Junhui,&Zhao, Ping.(2021).Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7),5253-5268.
MLA	Che, Junhui,et al."Characteristics of the summer atmospheric boundary layer height over the Tibetan Plateau and influential factors".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021):5253-5268.