佛山新机场建成对局地雾及低云影响的数值模拟分析

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中图分类号：P435 文献标志码：A 文章编号：2096-3599（2025）04-0045-10

DOI：10.19513/j.cnki.hyqxxb.20250619001

Numerical simulation on impact of new airport construction in Foshan on local fog and low clouds

（1.Shaoguan Meteorological Service，Shaoguan 512O26，China；2.Guangdong Climate Center，Guangzhou 510640， China;3. Zhanjiang Meteorological Service，Zhanjiang 5240o1，China; 4.Collegeof Oceanand Meteorology，Guangdong Ocean University， Zhanjiang 524088， China）

AbstractTo assessthe 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 acombined 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 postconstruction 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% . Thiseffectively inhibitsthe fog formationand significantly improves thevisibility，with the maximum improvement exceeding 10km . Concurrently，the markedly elevated high-humidity layer suppresses the condensation into clouds，reducing the frequency of low clouds.This work quantitatively reveals the suppressive ffect 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.

Keywordsnew airport； modification of underlying surface； fog and low cloud; visibility;numerical simulation

0 引言

能见度是表征大气透明状况的物理量，是气象学与航空安全领域的关键参数。（剩余8429字）