基于地方气候区空间分布的室外 PM10 季节性变化

IF 6 2区 工程技术 Q1 ENVIRONMENTAL SCIENCES
Mahsa Mostaghim , Ayman Imam , Ahmad Fallatah , Amir Reza Bakhshi Lomer , Mohammad Maleki , Junye Wang , Iain D. Stewart , Nabi Moradpour
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引用次数: 0

摘要

城市和非城市地区的空气污染变化在很大程度上取决于季节和风向。然而,在伊朗利用遥感数据评估季节性对空气污染(如颗粒物)的影响还很少。因此,必须调查季节变化对 PM10 的影响,以减轻其不利影响。地方气候区(LCZ)是对城市土地利用和气候区进行分类的一种新方法,可用于估算城市地区 PM10 的季节性变化。本文从季节性和 LCZ 空间分布的角度评估了德黑兰市 PM10 的季节性分布变化。使用机器学习和随机森林算法对 LCZ 进行分类,并使用 Saraswat 算法评估 PM10 的空间分布。结果表明,季节性会对德黑兰地区的 PM10 水平产生重大影响。秋冬季的 PM10 水平远高于春夏季。秋季平均降水量低,PM10 水平最高,而夏季水平最低。研究还发现,夏秋季的变化导致所有低纬度区的 PM10 水平大幅上升,只有大水域的 G 低纬度区除外。德黑兰市最大比例的增加与夏秋变化有关(93.9%),而最大比例的减少与冬春变化有关(84.6%)。研究还发现,与非城市低碳区相比,城市低碳区的 PM10 水平变化更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seasonal outdoor PM10 changes based on the spatial local climate zone distribution
Air pollution changes in urban and non-urban areas depend highly on the seasons and winds. However, it is scant to evaluate the effects of seasonality on air pollution, such as particulate matter (PM) using remote sensing data in Iran. Therefore, investigating the impacts of seasonal changes on PM10 is imperative to mitigate its adverse effect. Local Climate Zone (LCZ) is a new approach in classification of urban land use and climate zones to estimate seasonal PM10 changes in urban regions. In this article, seasonal PM10 distribution changes were evaluated in terms of seasonality and spatial LCZ distribution in Tehran city. Machine learning and Random Forest algorithm were used to classify LCZs and Saraswat algorithm was used for evaluating spatial PM10 distribution. The results showed that seasonality could significantly affect PM10 levels in Tehran region. PM10 levels in autumn and winter are much higher than that in spring and summer. There was the highest PM10 level due to a low average precipitation in autumn while the lowest levels in summer. It is also found that the summer-autumn change caused substantial increases in all LCZs except for LCZ G of large water area. The largest percentage of increases in Tehran city was related to change of summer to autumn (93.9 %) while the largest decrease was in winter to spring (84.6 %). It was also found that PM10 level changes more in the urban LCZs than in the non-urban LCZs.
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来源期刊
Urban Climate
Urban Climate Social Sciences-Urban Studies
CiteScore
9.70
自引率
9.40%
发文量
286
期刊介绍: Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]
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