干旱区生态环境知识资源中心(Arid): Influence of the low-level jet on the intensity of the nocturnal oasis cold island effect over northwest China

Arid

DOI	10.1007/s00704-019-02967-w
	Influence of the low-level jet on the intensity of the nocturnal oasis cold island effect over northwest China
	Cao, Bangjun 1,2; Zhang, Yu 1; Zhao, Yong 1; Wen, Xiaohang 1; Fan, Guangzhou 1; Xiao, Meijia 1; Jin, Lili 2
通讯作者	Cao, Bangjun
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2020
卷号	139 期号:1-2 页码:689-699
英文摘要	The nocturnal oasis cold island (OCI) effect is an important phenomenon seen over the heterogeneous surfaces of oases and deserts in northwest China and is influenced by many unknown complex factors. Using field observations and wind profile radar data over oases and deserts in Zhangye city, China, we analyze the relationship between the OCI effect and the low-level jet (LLJ). Vertical mixing induced by the LLJ has a profound impact on the intensity of the OCI effect during the night. The mean nocturnal intensity of the OCI effect and the strength of the nocturnal LLJ are significantly correlated. We investigate two examples in detail-one with a strong OCI effect and one with a weak OCI effect-using observational data and simulations by the Weather Research and Forecasting model. During a weak LLJ, when the wind speed decreases and vertical mixing is weakened, the increase in evaporation over the oasis causes the temperature to decrease dramatically and results in a strong OCI effect. During a strong LLJ, the strong shear induced below the nose of the LLJ enhances turbulent mixing, heat is transported downward, and the temperature over the oasis decreases slightly. The near-surface wind speed over the desert increases, and the decrease in temperature is larger than that during a weak LLJ. Therefore, the intensity of the OCI effect decreases during a strong LLJ.
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000511515200046
WOS关键词	BOUNDARY-LAYER ; SIMULATIONS ; TURBULENT ; SUMMER ; IMPACT ; REGION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315653
作者单位	1.Chengdu Univ Informat Technol, Sch Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Pro, 24 Block 1,Xuefu Rd, Chengdu 610225, Peoples R China; 2.China Meteorol Adm, Inst Desert Meteorol, Urumqi 830002, Peoples R China
推荐引用方式 GB/T 7714	Cao, Bangjun,Zhang, Yu,Zhao, Yong,et al. Influence of the low-level jet on the intensity of the nocturnal oasis cold island effect over northwest China[J],2020,139(1-2):689-699.
APA	Cao, Bangjun.,Zhang, Yu.,Zhao, Yong.,Wen, Xiaohang.,Fan, Guangzhou.,...&Jin, Lili.(2020).Influence of the low-level jet on the intensity of the nocturnal oasis cold island effect over northwest China.THEORETICAL AND APPLIED CLIMATOLOGY,139(1-2),689-699.
MLA	Cao, Bangjun,et al."Influence of the low-level jet on the intensity of the nocturnal oasis cold island effect over northwest China".THEORETICAL AND APPLIED CLIMATOLOGY 139.1-2(2020):689-699.