Xu, C.; Xiao, X. Comparison of Cold Pool Characteristics of Two Distinct Gust Fronts over Bohai Sea Bay in China. Atmosphere2024, 15, 247.
Xu, C.; Xiao, X. Comparison of Cold Pool Characteristics of Two Distinct Gust Fronts over Bohai Sea Bay in China. Atmosphere 2024, 15, 247.
Xu, C.; Xiao, X. Comparison of Cold Pool Characteristics of Two Distinct Gust Fronts over Bohai Sea Bay in China. Atmosphere2024, 15, 247.
Xu, C.; Xiao, X. Comparison of Cold Pool Characteristics of Two Distinct Gust Fronts over Bohai Sea Bay in China. Atmosphere 2024, 15, 247.
Abstract
Previous studies have demonstrated that cold pools play a pivotal role in the initiation and organization of convection, yet their influence on the evolution of GFs remains inadequately understood. A destructive wind event associated with a rearward gust front (RGF, 8 grade gale appeared after passing GF) and a prior gust front (PGF, 10 grade gale appeared before passing GF) over the north coast of China on 10 June 2016 was analyzed. Using multiple observation data as well as the four-dimensional Variational Doppler Radar Data Assimilation System (VDRAS), we found that the intensity of the GFs increased with increasing cold pool strength, depth and propagation speed. Two schematic models were proposed to explain the discrepancy between GFs and associated cold pools. The depth and intensity of the cold pool in RGF are found to be relatively shallower and weaker, leading to a correspondingly reduced strength in both outflow and convergence. In contrast, the enhanced vertical shear and boundary northeaster inflow of PGF generate intensified and more organized downdrafts, resulting in a deeper cold pool, robust outflow, and convergence. These findings offer novel insights into the diversity of GFs and associated cold pools.
Environmental and Earth Sciences, Atmospheric Science and Meteorology
Copyright:
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