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Urbanization Effects on Surface Wind in the Guangdong–Hong Kong–Macao Greater Bay Area Using a Fan-Sector Method

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Listed:
  • Dong Xia

    (State Key Laboratory of Lunar and Planetary Science, Macau University of Science and Technology, Macau 999078, China
    Zhuhai Public Meteorological Service Center, Zhuhai 519000, China)

  • Huiwen Nie

    (Zhuhai Public Meteorological Service Center, Zhuhai 519000, China)

  • Lei Sun

    (Zhuhai Public Meteorological Service Center, Zhuhai 519000, China)

  • Jing Wang

    (Zhuhai Public Meteorological Service Center, Zhuhai 519000, China)

  • Kim-Chiu Chow

    (State Key Laboratory of Lunar and Planetary Science, Macau University of Science and Technology, Macau 999078, China)

  • Kwing-Lam Chan

    (School of Information Technology, Macau University of Science and Technology, Macau 999078, China)

  • Donghai Wang

    (Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519000, China
    Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
    National Observation and Research Station of Coastal Ecological Environments in Macao, Macau Environmental Research Institute, Macau University of Science and Technology, Macau 999078, China)

Abstract

Surface wind directly affects human life, wind energy utilization, the atmospheric environment, and many other aspects. The Guangdong–Hong Kong–Macau Greater Bay Area (GBA) megalopolis is experiencing an accelerated progress of urbanization, which may result in the change in surface roughness and atmospheric characteristics. In this study, urbanization effects on surface wind speed (SWS) in the GBA megalopolis, particularly Zhuhai, is investigated by using long-term automatic meteorological measurements, ERA5 reanalysis, and nighttime light data. Results of the analysis show that the averaged SWS has decreased significantly at a rate of −0.53 m s −1 per decade over the past decades. With the help of observation-minus-reanalysis (OMR) method, which excludes the atmospheric circulation effects, we found that the decrease in SWS is mainly contributed by the increase in surface roughness, which may account for as much as 75.5% of the decrease. In other words, it is the rapid development of urbanization, rather than the change in large-scale circulation, that could be mainly responsible for the decrease over the GBA in the context of the increasing global SWS since 2010. In addition, a fan-sector method is established to quantitatively analyze the correspondences between urbanization and roughness changes. It is shown that the decrease in wind speed due to surface roughness change is significantly related to the increase in the nighttime light index (NLI) averaged over the 3 km upstream fan-sectors. Moreover, their correlation reaches to 0.36 (negative) when only accounting for the samples of NLI greater than 10. In general, the fan-sector method offers an additional option for assessing the urbanization effects on SWS.

Suggested Citation

  • Dong Xia & Huiwen Nie & Lei Sun & Jing Wang & Kim-Chiu Chow & Kwing-Lam Chan & Donghai Wang, 2022. "Urbanization Effects on Surface Wind in the Guangdong–Hong Kong–Macao Greater Bay Area Using a Fan-Sector Method," IJERPH, MDPI, vol. 19(6), pages 1-15, March.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:6:p:3194-:d:766828
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    References listed on IDEAS

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