Numerical simulation on impact of new airport construction in Foshan on local fog and low clouds
LIU Yanqun
ZHANG Yu
ZHANG Ji
ZHANG Liuhong
HUANG Haohui
WU Hao
QIN Peng
ZHOU Haoyu
ZHI Shiqun
Abstract：To assess the impact of the modification of underlying surface at the new airport site in Foshan on the local fog and low clouds that can cause low visibility,this study employs a combined approach of numerical simulation and observational data to analyze the evolution characteristics of visibility,low cloud cover and relative humidity before and after the modification.The results are shown below.(1)The low clouds and low visibility events at the preselected site predominantly occur from predawn to early morning with similar diurnal variation patterns,whose frequencies account for of 11.0％and 19.7％of the total number of days throughout the year,respectively.(2)The simulations demonstrate that the post-construction alterations in surface properties and terrain elevation induce localized warming and reduced relative humidity,and particularly at night,the relative humidity drops by over 10％.This effectively inhibits the fog formation and significantly improves the visibility,with the maximum improvement exceeding 10 km.Concurrently,the markedly elevated high-humidity layer suppresses the condensation into clouds,reducing the frequency of low clouds.This work quantitatively reveals the suppressive effect of the modification of underlying surface on low visibility,providing direct scientific support for flight safety threshold design,reference for meteorological risk prediction in terms of airport operations,and a climate impact assessment framework for siting comparable major infrastructure projects such as transportation hubs.
Keywords：new airportmodification of underlying surfacefog and low cloudvisibilitynumerical simulation
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 45-54 )