DOI: 10.1002/2015JD024450
论文题名: Impact of physics parameterizations on high-resolution weather prediction over two Chinese megacities
作者: Barlage M. ; Miao S. ; Chen F.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 9 起始页码: 4487
结束页码: 4498
语种: 英语
英文关键词: Beijing
; high-resolution weather prediction
; physics parameterizations
; urban area
; Weather Research and Forecasting model
Scopus关键词: air quality
; climate modeling
; kinetic energy
; metropolitan area
; parameterization
; temperature gradient
; warming
; weather forecasting
; Beijing [China]
; China
; Tianjin
英文摘要: The 1 km Institute of Urban Meteorology (IUM) operational model has a high-Temperature bias, especially at night, and a high wind speed bias in urbanized areas, limiting the ability of IUM to provide accurate, high-resolution prediction of thermal stress and air quality for the densely populated Beijing-Tianjin metro region. This study provides an assessment of the IUM WRF-based operational model setups and performs a diagnostic analysis to isolate the contributions of model physics parameterization schemes to operational forecast bias over complex urban regions. Results show that non-Turbulent kinetic energy (TKE) planetary boundary layers (PBL) schemes perform better than their counterpart TKE-based schemes at night, reducing the warm bias by about 1°C in nonurban areas. However, the best performing urban PBL scheme still produces ∼2°C warm bias. Considering aerosol effects in the solar radiation scheme improves downward solar radiation and surface energy budgets but has negligible effect on the simulated temperature. Urban canopy models and the specification of various urban model parameters have comparable or even more significant contributions to forecast biases in temperature and wind speed than PBL schemes. The predicted PBL height using an optimized urban parameter table is lower by about 100-200 m, which is about 50-100% of the interurban scheme effect on the PBL height. Overall, the Building Effect Parameterization urban scheme with the default parameter table, or a parameter table with less urban heat storage, is recommended for the best results in urban areas and shows that most of the urban areas of Beijing and Tianjin have a greater than 4°C improvement in absolute temperature bias and more than 1 m s-1 improvement in absolute wind speed bias. © 2016. 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/62894
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; Institute of Urban Meteorology, China Meteorological Administration, Beijing, China
Recommended Citation:
Barlage M.,Miao S.,Chen F.. Impact of physics parameterizations on high-resolution weather prediction over two Chinese megacities[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)