DOI: 10.1175/JCLI-D-13-00571.1
Scopus记录号: 2-s2.0-84905161106
论文题名: Numerical simulations of spatial distributions and diurnal variations of low-level jets in China during early summer
作者: Du Y. ; Zhang Q. ; Chen Y.-L. ; Zhao Y. ; Wang X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 15 起始页码: 5747
结束页码: 5767
语种: 英语
Scopus关键词: Boundary layers
; Jets
; Momentum
; Spatial distribution
; Statistics
; Asia
; Diurnal variation
; Horizontal resolution
; Inertial oscillation
; Meso-scale models
; Numerical analysis/modeling
; Seasonal variation
; Weather research and forecasting models
; Weather forecasting
; boundary layer
; computer simulation
; diurnal variation
; jet flow
; mesoscale meteorology
; numerical model
; spatial distribution
; summer
; vertical mixing
; vortex flow
; weather forecasting
; China
; Qinghai-Xizang Plateau
; Tarim Basin
; Xinjiang Uygur
; Citrus maxima
英文摘要: The detailed spatial distributions and diurnal variations of low-level jets (LLJs) during early summer (May-July) in China are documented using 2006-11 hourly model data from the Weather Research and Forecasting (WRF) Model with a 9-km horizontal resolution. It was found that LLJs frequently occur in the following regions of China: the Tarim basin, northeastern China, the Tibetan Plateau (TP), and southern China. The LLJs over China are classified into two types: boundary layer jets (BLJs, below 1 km) and synoptic-system-related LLJs (SLLJs, within 1-4 km). The LLJs in the Tarim basin and the TP are mainly BLJs. The SLLJs over southern China and northeastern China are associated with the mei-yu front and northeast cold vortex (NECV), respectively. The BLJs in all regions show pronounced diurnal variations with maximum occurrences at nighttime or in the early morning, whereas diurnal variations of SLLJs vary, depending on the location. From the analysis of model data, the diurnal variation of BLJs is mainly caused by inertial oscillation at nighttime and vertical mixing in the boundary layer during daytime. Over northeastern China, SLLJ occurrences show little diurnal variation. Over southern China, two diurnal modes of SLLJs, propagation and stationary, exist and have seasonal variations, which is generally consistent with diurnal variations of precipitation. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51147
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Department of Meteorology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI, United States; Weather Modification Office, Xingjiang Uygur Autonomous Region of China, Urumqi, China
Recommended Citation:
Du Y.,Zhang Q.,Chen Y.-L.,et al. Numerical simulations of spatial distributions and diurnal variations of low-level jets in China during early summer[J]. Journal of Climate,2014-01-01,27(15)