Synoptic analysis and urban signatures of a heavy rainfall on 7 August 2015 in Beijing

Miao Yu; Shiguang Miao; Qingchun Li

doi:10.1002/2016jd025420

journal article Jan 06, 2017

Synoptic analysis and urban signatures of a heavy rainfall on 7 August 2015 in Beijing

Miao Yu

Shiguang Miao

Qingchun Li

Journal of Geophysical Research: Atmospheres Vol. 122 No. 1 pp. 65-78 · American Geophysical Union (AGU)

View at Publisher Save 10.1002/2016jd025420

Abstract

AbstractA heavy rainfall event that occurred in Beijing on 7 August 2015 was investigated by means of several nonconventional observational data and the Beijing Rapid Update Cycle Model (v3.0). A cold front guided by an upper trough and the wind shear line are main factors influencing this rainfall event. The two factors combined were enhanced after passing the Beijing downtown area. A Nourban land use scenario was employed to analyze the impact of urbanization on this rainfall event. The results show that the urban land use type, which induces the wind shear line, is indispensable in forecasting the rainstorm. The urban land use type leads to gradients of the sensible heat flux, temperature, and wind increasing in the suburban area, which may allow the synoptic systems to merge and enhance. Urbanization caused the precipitation to increase in the downstream suburban area and the spatial distribution of precipitation to become more concentrated. Ensemble tests of different parameterization schemes confirm that the results are reliable.

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References

Details

Published: Jan 06, 2017
Vol/Issue: 122(1)
Pages: 65-78
License: View

Authors

M

Miao Yu

Institute of Urban Meteorology China Meteorological Administration Beijing China

S

Shiguang Miao

Institute of Urban Meteorology China Meteorological Administration Beijing China

Q

Qingchun Li

Institute of Urban Meteorology China Meteorological Administration Beijing China

Cite This Article

Miao Yu, Shiguang Miao, Qingchun Li (2017). Synoptic analysis and urban signatures of a heavy rainfall on 7 August 2015 in Beijing. Journal of Geophysical Research: Atmospheres, 122(1), 65-78. https://doi.org/10.1002/2016jd025420

Synoptic analysis and urban signatures of a heavy rainfall on 7 August 2015 in Beijing

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