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Estimation of Urbanization Impacts on Local Weather: A Case Study in Northern China (Jing-Jin-Ji District)

1
Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
2
The State Key Laboratory of Simulations and Regulations of Water Cycles in River Basins (SKL-WAC), China Institute of Water Resources and Hydropower Research (IWHR), Beijing 100038, China
3
Laboratory of Spatial Information Integration, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(4), 797; https://doi.org/10.3390/w11040797
Received: 6 January 2019 / Revised: 19 March 2019 / Accepted: 1 April 2019 / Published: 17 April 2019
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Abstract

With the past rapid economic development and large population growth, Jing-Jin-Ji District has been undergoing rapid urbanization, which has caused considerable regional weather changes in local regions. In this paper, we used the Weather Research and Forecasting (WRF) model to quantitatively analyze the effects of past urbanization and potential future urbanization on the regional weather in the center of Jing-Jin-Ji District. The hydrometeorological data from two weeks in July 2019 were used to simulate the influence of urbanization on local weather in the Jing-Jin-Ji District at regional scales using a single-layer canopy parameterization scheme. To better quantify the differences in temperature and precipitation induced by urbanization, three simulation scenarios were designed, which were no urban cover (NU), current urbanization cover (CU), and full urban land cover (FU), respectively. The results showed that: (1) Urbanization progress (from NU to CU and from CU to FU) in Jing-Jin-Ji District increased the daytime temperature, night temperature, and temperature difference between day and night, while decreasing the total rainfall and peak rainfall. (2) Compared with NU, the mean temperature of the CU and FU increased 0.3 K and 0.6 K, respectively, and the mean precipitation of CU and FU decreased by approximately 6% and 8.4%, respectively. (3) The main influence of urbanization on weather was reflected by the maximum temperature and peak rainfall, while the other impacts were relatively insignificant. (4) Compared with NU, the maximum temperature of CU and FU increased 0.82 K and 1.35 K, respectively, and the peak rainfall of NU and FU decreased by approximately 9.5% and 19.0%, respectively; The results of this study bring to light the urban management strategies for policy makers. View Full-Text
Keywords: local weather; temperature; precipitation; urbanization; Jing-Jin-Ji District local weather; temperature; precipitation; urbanization; Jing-Jin-Ji District
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Su, H.-D.; Cao, X.; Wang, D.-C.; Jia, Y.-W.; Ni, G.; Wang, J.; Zhang, M.; Niu, C. Estimation of Urbanization Impacts on Local Weather: A Case Study in Northern China (Jing-Jin-Ji District). Water 2019, 11, 797.

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