STUDY ON THE URBAN HEAT ISLANDS AND METEOROLOGICAL ELEMENTS OVER THE PEARL RIVER DELTAChinese Full Text
DING Shuo-yi;QIAO Guan-jin;GUO Yuan-yuan;WU Yu-xuan;WANG Bao-min;Department of Atmospheric Science, Sun Yat-sen University;
Abstract: Scientific evaluation of urban heat islands（UHI） over city clusters is important for the study of urbanization effects on regional climate and environment. In this paper, UHI and meteorological elements over the Pearl River Delta（PRD） are investigated using data measured at 20 meteorological observation stations during the period of 1999—2008. A standard deviation method is adopted to choose suburb stations by calculating UHI intensity over three zones in PRD. The average UHI intensity is 0.71 ℃ and the linear trend is 0.29 ℃/（10 a）. The spatial distribution of UHI presents a tri-pole pattern, in which the UHI intensity in the middle zone of PRD is higher than in the east and west zone. The average UHI shows clearly seasonal and diurnal changes, which is weakest in spring（0.39 ℃） and strongest in autumn（1.06 ℃）, and higher during nighttime（0.91 ℃） than in daytime（0.53 ℃）. The UHI intensity decreases with increasing low-cloud cover, relative humidity, wind speed and precipitation. The results may contribute to urban planning and zoning of meteorological and environmental risk in PRD.
Keywords：
Pearl River Delta; heat island intensity; heat island occurrence frequency; low-cloud cover; relative humidity; wind speed; precipitation;
- DOI：
10.16032/j.issn.1004-4965.2015.05.011
- Series：
- Subject：
- Classification Code：
X16
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