Predicting future UK nighttime urban heat islands using observed short-term variability and regional climate projections

Predicting future UK nighttime urban heat islands using observed short-term variability and regional climate projections
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使用观测到的短期变化和区域气候预测预测未来英国夜间城市热岛

DOI:
10.1088/1748-9326/acf94c
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发表时间:
2023
影响因子:
6.7
通讯作者:
Doger De Speville C
Doger De Speville C
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Doger De Speville C

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到2050年,世界人口的68%和英国人口的90%估计将生活在城市地区。人们普遍认为,城市地区往往比农村地区更温暖(城市热岛效应),夏季气温升高会增加发病率和死亡率。因此,了解未来城市热岛强度将如何变化是很重要的。最近的工作已经使用观察到的日常热岛温度的关系,表明热岛强度可能会降低下变暖的温度。在这里,我们分析了英国区域气候预测UKCP 18-regional对英国十个城市夏季夜间热岛强度进行建模的能力。当HadUK-Grid观测数据相比,我们发现,该模型准确地模拟了城市和农村温度之间的日常关系的城市热岛强度的平均幅度。特别是,在10个城市中的9个,模型和观测数据都显示,在1980-2020年期间,随着温度的升高,城市热岛强度下降。然后,我们分析预测未来的UHI强度之间的相关性,使用UKCP 18区域和那些推断出的历史每日UHI温度关系。我们发现这种关系在统计上并不显着,并且模型预测的热岛强度变化大于从所有分析城市的历史关系推断的变化。我们的结论是,使用短期的变化来预测未来的城市热岛变化,最近的一些工作提出的,可能是不合适的。我们的研究结果激励进一步的研究,以了解不同时间尺度和不同地区的城市热岛变化的影响过程。
By 2050, 68% of the world's population and 90% of the UK's population are estimated to be living in urban areas. It is widely acknowledged that urban areas tend to be warmer than rural areas (the urban heat island (UHI) effect), and that increased summer temperatures increase morbidity and mortality. It is therefore important to know how the UHI intensity will change in the future. Recent work has used observed daily UHI-temperature relationships to suggest that the UHI intensity may decrease under warming temperatures. Here we analyse the ability of the regional UK Climate Projections, UKCP18-regional, to model the summer nighttime UHI intensity of ten UK cities. When compared to HadUK-Grid observational data, we find that the model accurately simulates both the mean magnitude of the UHI intensities and the daily relationship between urban and rural temperature. In particular, in 9 of the 10 cities, the model and observational data both show a decrease in UHI intensity with warmer temperature over the 1980–2020 period analysed. We then analyse the correlation between the projected future UHI intensities using UKCP18-regional and those inferred from the historical daily UHI-temperature relationships. We find that this relationship is not statistically significant and that the model-projected change in UHI intensity is greater than the change inferred from the historical relationship for all cities analysed. We conclude that using short-term variability to predict future UHI change, as proposed by some recent work, may not be appropriate. Our results motivate further research to understand processes impacting UHI changes on different timescales and in different regions.
DOI: 10.1002/joc.2402
发表时间: 2012-10-01
期刊: INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子: --
作者:
McCarthy, M. P.;Harpham, C.;Jones, P. D.
通讯作者: Jones, P. D.
DOI: --
发表时间: 2005-08
期刊: Lawrence Berkeley National Laboratory
影响因子: --
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通讯作者: H. Akbari
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DOI: --
发表时间: 2021
期刊: Climate Dynamics
影响因子: 4.6
作者:
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通讯作者: S. Bohnenstengel
社会经济影响——城市气候
DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
K. Schlünzen;S. Bohnenstengel
通讯作者: S. Bohnenstengel
DOI: 10.1002/qj.668
发表时间: 2010-07
影响因子: 8.9
作者:
A. Porson;Peter Clark;Ian N. Harman;Martin Best;Stephen E. Belcher
通讯作者: A. Porson;Peter Clark;Ian N. Harman;Martin Best;Stephen E. Belcher