Urbanization signatures in strong versus weak precipitation over the Pearl River Delta metropolitan regions of China

Weibiao Li, Sheng Chen, Guixing Chen, Weimin Sha, Cong Luo, Yerong Feng, Zhiping Wen, Baomin Wang

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We assess the issues of urban effects on the precipitation over the Pearl River Delta (PRD) metropolitan regions of China. The spatial and temporal variations of strong versus weak precipitation over the PRD and surrounding nonurban areas are investigated. The results show that the urbanization signatures in strong precipitation are significantly different from those in weak precipitation over the urban areas. The PRD experiences more strong precipitation but less weak precipitation compared to surrounding nonurban regions. In addition, the strong precipitation over the PRD displays a pronounced seasonal variation. The seasonality of weak precipitation, however, is much weaker over the PRD compared to the surrounding nonurban regions. Moreover, a strengthening in the precipitation intensity, a reduction in the rainfall frequency and an increase in the convective precipitation as well as the afternoon precipitation are found over the urban areas, which are probably associated with the abundance in strong precipitation and the deficit in weak precipitation over the PRD.

Original languageEnglish
Article number034020
JournalEnvironmental Research Letters
Volume6
Issue number3
DOIs
Publication statusPublished - 2011 Jul

Keywords

  • Pearl River Delta of China
  • precipitation
  • urbanization effects

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health

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