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Restoration of an Inner-City stream and Its Impact on Air Temperature and Humidity Based on Long-Term Monitoring Data

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Advances in Atmospheric Sciences 2009年第2期26卷 283-292页

作者： Kyu Rang KIM Tae Heon KWON Yeon-Hee KIM Hae-Jung KOO Byoung-Cheol CHOI Chee-Young CHOI Applied Meteorology Research Laboratory National Institute of Meteorological Research Korea Meteorological Administration Applied Meteorology Research Laboratory National Institute of Meteorological ResearchKorea Meteorological Administration

Spatiotemporal changes in air temperature and humidity associated with the restoration of an innercity stream in Seoul, Korea, are investigated based on long-term monitoring data. The cheonggye stream, covered under a concrete structure for 46 years, was restored in 2005 and runs 5.8 km eastward through a central region of Seoul. Long-term monitoring of the air temperature and relative humidity was made along the stream throughout the restoration and across the stream after the restoration. The area along the stream had a higher air temperature than the entire metropolitan area. The temperature anomaly between the monitoring area and the surrounding metropolitan area was 0.13℃ lower on average at the center of the stream after the restoration. The stream＇s effect on the air temperature was also evident in the temperature distribution along a street traversing the stream. The relative and specific humidities were increased due to the restoration. The restored stream modified the nearby urban climate in the opposite direction compared to urbanization. The results could be used as a model case in mitigating urban climate by a stream in future urban planning practices.

关键词： urban heat island stream restoration land-use vegetation cheonggye stream

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