Observational evidence of intensified nocturnal urban heat island during heatwaves in European cities
Bibliographic Data
| ID | 15545964 |
|---|---|
| Authors | Marco Possega (0000-0002-0781-7051, University of Bologna, corresponding author), Leonardo Aragão (0000-0003-2843-505X, University of Bologna), Paolo Ruggieri (0000-0003-1996-7206, University of Bologna), Marco A Santos (0000-0003-4189-2714, University of Bologna, corresponding author), Silvana Di Sabatino (0000-0003-2716-9247, University of Bologna) |
| Year | 2022 |
| Volume | 17 |
| Issue | 12 |
| Pages | 124013-124013 |
| Publication date | 2022-11-17 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/aca3ba |
| OpenAlex | W4309402006 |
| Language | EN |
| Citations received | 3 |
| References cited | 48 |
A heatwave (HW) is a large-scale meteorological event characterised by persistent and extremely high-temperature condition. At the local scale, the urban heat island (UHI) is another thermal-related phenomenon defined as an urban area warmer than its surrounding regions due to different surfaces’ capabilities to absorb and store heat. However, the assessment about the effect produced on UHI by HW events is not homogeneous. Indeed, regarding the capability of HWs to influence the urban-rural temperature difference, several studies report different conclusions describing both an exacerbation and a reduction of UHI during HW events. In this context, the present study analyses in situ long records of temperature measurements (20 years) to provide observational shreds of evidence of UHI modification under HW conditions. We examine data from the European Climate Assessment & Dataset and World Meteorological Organization computing the UHI index (UHII) to quantify the UHI effect intensity in 37 European cities during the last 20 summers. The results show an UHII intensification for 28 of the 32 cities affected by positive UHI during extremely high temperatures at night, while substantial variations are not observed during the daytime. The time evolution of UHI during a HW highlights that a more significant and persistent urban-rural temperature gradient explains the UHI intensification. Finally, the relationship between the large and local-scale temperature phenomena reveals that continental high-temperature periods are often associated with prominent temperature differences between small-scale urban and rural environments, assessing the impact of large-scale features on thermal stress at the local scale
Atmospheric sciences · Climatology · Context (archaeology · Daytime · Geography · Meteorology · Nocturnal · Urban climate · Urban heat island · Urbanization · Building Energy and Comfort Optimization · Environmental Science · Urban Green Space and Health · Urban Heat Island Mitigation · Geology
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| Unique citing works | 3 |
|---|---|
| Citations per year | 1,5 |
| Citation span | 2024 - 2026 (3) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 2 |