IMPACT OF URBANIZATION IN DIFFERENT REGIONS OF EASTERN CHINA ON PRECIPITATION AND ITS UNCERTAINTY |
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Authors: | JIANG Zhi-hong LI Yang and HUANG Dan-lian |
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Affiliation: | Key Laboratory of Meteorological Disaster, Ministry of Education / Joint International Research Laboratory of Climate and Environment Change / Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of In |
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Abstract: | Climate effect caused by urbanization has been an indispensable
anthropogenic factor in the research on regional climate change. Based on daily
precipitation data, possible effects of precipitation on the development of three
city groups in eastern China are discussed. With three classification methods
(TP, PD and MODIS land cover), urban and rural stations are identified. The main
findings are as follows. Climate effects caused by urbanization are different
from place to place. In 1960 to 2009, the urbanization brought more precipitation
to the Yangtze River Delta and Pearl River Delta city groups but had no obvious
effect on the precipitation of the Beijing-Tianjin-Tangshan city group. The
difference of precipitation is slight between urban and suburban areas during
slow period of the urbanization from 1960 to 1979. It is more evident in the
rapid period (1980 to 2009) that urbanization has positive effects on
precipitation in every city group. The difference of precipitation between urban
and rural stations is sensitive to the ways of distinguishing rural from urban
area, which may cause uncertainties in 1960 to 1979, while it is very different
in 1980 to 2009 in which urbanization favors more precipitation in all city
groups and their differences in precipitation are not sensitive to the division
methods. |
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Keywords: | city group urbanization precipitation trend extreme precipitation |
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