Elucidating the Multi-Timescale Variability of a Canopy Urban Heat Island by Using the Short-Time Fourier Transform
文献类型：期刊论文
| 作者 | Zhang, Longrui1; Luo, Fu1; Pan, Guitao2; Zhang, Wenjie3,4; Ren, Guoyu5,6; Zheng, Zuofang7; Yang, Yuanjian1 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2024-01-16 |
| 卷号 | 51期号:1页码:11 |
| ISSN号 | 0094-8276 |
| 关键词 | urban heat island short-time Fourier transform spectrum analysis multi-timescale variability heat wave cold wave |
| DOI | 10.1029/2023GL106221 |
| 通讯作者 | Yang, Yuanjian(yyj1985@nuist.edu.cn) |
| 英文摘要 | Taking the megacity of Beijing as an example, a short-time Fourier transform (STFT) method was employed to extract the multi-timescale evolution pattern of the canopy urban heat island intensity (CUHII) during 2000-2020. The STFT of CUHII showed a close relationship between the evolution of the CUHII in Beijing and the background meteorological forcing at intra-annual, weather and intra-daily scales. The intra-annual-scale spectrum of CUHII exhibited an increasing trend with obvious seasonal variation of the canopy urban heat island (CUHI). The intra-daily-scale spectrum of CUHII showed an increasing trend with the nighttime CUHI developing faster. Increasing Western Pacific Subtropical High intensity can enhance the seasonal and diurnal fluctuations of CUHII. The weather-scale spectrum of CUHII is controlled by weather system evolution, showing that the frequency of cold/heat waves (CWs/HWs) in Beijing was significantly negatively correlated with the weather-scale spectral intensity of the CUHII. CWs and HWs can increase the CUHII for a long duration. The canopy urban heat island (CUHI) phenomenon can affect human health and the ecological environment, and its multi-timescale variability brings great uncertainty to the study of urban climates worldwide. In this study, taking the megacity of Beijing as an example, a novel short-time Fourier transform (STFT) method was used to extract the multi-timescale pattern of the CUHI intensity (CUHII) during 2000-2020. The STFT of CUHII showed a close relationship between the CUHI and the background meteorological forcing at intra-annual, weather and intra-daily scales. The intra-annual spectrum of CUHII showed an increasing trend with a V-shaped mode. The local climatic backgrounds of different cities can lead to differences in the seasonal development of the CUHI. The intra-daily spectrum of CUHII showed an increasing trend due to the asymmetry in the day/night development of the CUHI. Increasing Western Pacific Subtropical High Intensity can enhance the seasonal and diurnal fluctuations of CUHII. The weather-scale spectrum of CUHII was mainly controlled by weather system evolution, showing that cold waves and heat waves can increase the CUHII over a long duration. Our findings indicate that the evolution of CUHII is a nonlinear and complex process that is directly related to multi-timescale background climate forcing. Using a short-time Fourier transform to study the multi-timescale evolution of the canopy urban heat island intensity (CUHII)Close relationships existed between CUHII and the background meteorological forcing at intra-annual, intra-daily, and weather scalesThe frequency of cold/heat waves in Beijing showed a significant negative correlation with the weather-scale spectral intensity of the CUHII |
| WOS关键词 | SPATIAL CHARACTERISTICS ; ANTHROPOGENIC HEAT ; IMPACT ; POLLUTION ; CLIMATE ; CITIES ; CHINA ; URBANIZATION ; OZONE |
| 资助项目 | NSFC[42222503] ; NSFC[42201053] ; National Natural Science Foundation of China ; State Key Laboratory of Resources and Environmental Information System |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:001136440900001 |
| 资助机构 | NSFC ; National Natural Science Foundation of China ; State Key Laboratory of Resources and Environmental Information System |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/201960]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yang, Yuanjian |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Key Lab Aerosol Cloud Precipitat, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Sch Atmospher Phys,China Meteorol Adm, Nanjing, Peoples R China 2.China Elect Council, Elect Power Evaluat & Consulting Inst, Beijing, Peoples R China 3.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing, Peoples R China 5.China Univ Geosci, Sch Environm Studies, Dept Atmospher Sci, Wuhan, Peoples R China 6.China Meteorol Adm, Natl Climate Ctr, Lab Climate Studies, Beijing, Peoples R China 7.China Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Longrui,Luo, Fu,Pan, Guitao,et al. Elucidating the Multi-Timescale Variability of a Canopy Urban Heat Island by Using the Short-Time Fourier Transform[J]. GEOPHYSICAL RESEARCH LETTERS,2024,51(1):11. |
| APA | Zhang, Longrui.,Luo, Fu.,Pan, Guitao.,Zhang, Wenjie.,Ren, Guoyu.,...&Yang, Yuanjian.(2024).Elucidating the Multi-Timescale Variability of a Canopy Urban Heat Island by Using the Short-Time Fourier Transform.GEOPHYSICAL RESEARCH LETTERS,51(1),11. |
| MLA | Zhang, Longrui,et al."Elucidating the Multi-Timescale Variability of a Canopy Urban Heat Island by Using the Short-Time Fourier Transform".GEOPHYSICAL RESEARCH LETTERS 51.1(2024):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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