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Impact of an improved WRF urban canopy model on diurnal air temperature simulation over northern Taiwan
http://hdl.handle.net/2241/00139066
http://hdl.handle.net/2241/0013906695902340-d0ab-49cd-954c-45ce0b956a2e
名前 / ファイル | ライセンス | アクション |
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ACP_16-3 (7.9 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2016-04-25 | |||||
タイトル | ||||||
タイトル | Impact of an improved WRF urban canopy model on diurnal air temperature simulation over northern Taiwan | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Lin, Chuan-Yao
× Lin, Chuan-Yao× Su, Chiung-Jui× Kusaka, Hiroyuki× Akimoto, Yuko× Sheng, Yang-Fan× Huang, Jr-Chuan× Hsu, Huang-Hsiung |
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著者別名 |
日下, 博幸
× 日下, 博幸 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | This study evaluates the impact of urbanization over northern Taiwan using the Weather Research and Forecasting (WRF) Model coupled with the Noah land-surface model and a modified urban canopy model (WRF–UCM2D). In the original UCM coupled to WRF (WRF–UCM), when the land use in the model grid is identified as "urban", the urban fraction value is fixed. Similarly, the UCM assumes the distribution of anthropogenic heat (AH) to be constant. This may not only lead to over- or underestimation of urban fraction and AH in urban and non-urban areas, but spatial variation also affects the model-estimated temperature. To overcome the abovementioned limitations and to improve the performance of the original UCM model, WRF–UCM is modified to consider the 2-D urban fraction and AH (WRF–UCM2D). The two models were found to have comparable temperature simulation performance for urban areas, but large differences in simulated results were observed for non-urban areas, especially at nighttime. WRF–UCM2D yielded a higher correlation coefficient (R2) than WRF–UCM (0.72 vs. 0.48, respectively), while bias and RMSE achieved by WRF–UCM2D were both significantly smaller than those attained by WRF–UCM (0.27 and 1.27 vs. 1.12 and 1.89, respectively). In other words, the improved model not only enhanced correlation but also reduced bias and RMSE for the nighttime data of non-urban areas. WRF–UCM2D performed much better than WRF–UCM at non-urban stations with a low urban fraction during nighttime. The improved simulation performance of WRF–UCM2D in non-urban areas is attributed to the energy exchange which enables efficient turbulence mixing at a low urban fraction. The result of this study has a crucial implication for assessing the impacts of urbanization on air quality and regional climate. |
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書誌情報 |
Atmospheric chemistry and physics 巻 16, 号 3, p. 1809-1822, 発行日 2016-02 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1680-7316 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12038447 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.5194/acp-16-1809-2016 | |||||
権利 | ||||||
権利情報 | © Author(s) 2016. CC Attribution 3.0 License. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Published by Copernicus Publications on behalf of the European Geosciences Union. |