DOI: 10.1002/2017JD027629
Scopus记录号: 2-s2.0-85040661742
论文题名: A Case Study of Low-Level Jets in Yerevan Simulated by the WRF Model
作者: Gevorgyan A.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 1 起始页码: 300
结束页码: 314
语种: 英语
英文关键词: cold-air pools
; low-level jets
; planetary boundary layer
; WRF model
; Yerevan
Scopus关键词: boundary condition
; boundary layer
; data set
; forecasting method
; frequency analysis
; jet
; parameterization
; zonal wind
; Armenia [West Asia]
; Yerevan
英文摘要: Capabilities of high-resolution (3 km) Weather Research and Forecasting (WRF) simulations to reproduce topographically induced mountain-valley winds and low-level jets (LLJs) in Yerevan have been evaluated using high-frequency observational and modeled data. High sensitivities of simulations of near-surface winds and LLJ characteristics observed on 4 July 2015 to both boundary layer and initial and lateral boundary conditions setup have been demonstrated. Among the nine tested planetary boundary layer (PBL) parameterization schemes the MYJ, QNSE, and TEMF PBL schemes showed greater skill in simulation of near-surface valley winds over Yerevan, while the other PBL schemes tend to significantly underestimate the strength of valley winds, with the BouLac PBL scheme being the worst performer. Most of PBL schemes simulate well-defined LLJs in Yerevan associated with evening valley winds. The simulated jet cores are mostly located between 150 and 250 m above ground with magnitudes varying from 12 to 21 m s−1. However, the intensity of the observed nocturnal LLJ in Yerevan (located at 110 m above ground) is strongly underestimated by most of the WRF runs while the Shin and Hong and YSU PBL schemes simulate nocturnal LLJs higher than the observed LLJ. The WRF runs initiated with newly released European Centre for Medium-Range Weather Forecasts ERA-5 data set showed improved simulation of near-surface winds and nighttime potential temperatures in Yerevan relative to those forced by the Global Forecast System fields. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114685
Appears in Collections: 气候减缓与适应
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作者单位: Department of Development and Validation of Hydrometeorological Models, Service of Hydrometeorology and Active Influence on Atmospheric Phenomena, Yerevan, Armenia; Institute for Informatics and Automation Problems, National Academy of Sciences of Armenia, Yerevan, Armenia
Recommended Citation:
Gevorgyan A.. A Case Study of Low-Level Jets in Yerevan Simulated by the WRF Model[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(1)