Gómez Igor, Molina Sergio, Galiana-Merino Juan José
Department of Applied Physics, Faculty of Sciences, University of Alicante, Section 99, E-03080 Alicante, Spain; Multidisciplinary Institute for Environmental Studies (MIES) "Ramón Margalef", University of Alicante, Section 99, E-03690 Alicante, Spain.
Department of Applied Physics, Faculty of Sciences, University of Alicante, Section 99, E-03080 Alicante, Spain; Multidisciplinary Institute for Environmental Studies (MIES) "Ramón Margalef", University of Alicante, Section 99, E-03690 Alicante, Spain.
J Environ Sci (China). 2023 Apr;126:633-643. doi: 10.1016/j.jes.2022.05.004. Epub 2022 May 18.
The present study evaluates ground-based downward surface shortwave radiation (R) over the coastal region of Alicante (Southeastern Spain). Hourly measurements collected over the eleven-year period 2010-2020 are used. Two weather stations located over the region capital, Alicante, have been selected as representative of urban and suburban typologies. Two additional weather stations far from the city have been selected representing rural typologies. R is significantly reduced over the urban station during the morning hours within the winter season compared to the observations recorded over the suburban and rural stations, with a global mean difference of -81 and -120 W/m at 10 LT, respectively. However, no significant differences are obtained during the midday sun, with a global mean difference of -20 W/m between the urban and rural stations. With the aim of explaining these differences, the current paper investigates the relationship between R and different air pollutants: NO, SO, and fine particulate matter (PM and PM) as well as the wind field measured at the urban and suburban stations. The results found in this work point towards a close relationship between R and NO concentrations annual cycles, which are also influenced by the prevailing wind circulations observed over the study area. A global mean NO concentration of 107 µg/m is observed over the urban station at 10 LT during the winter season. In contrast, these high concentrations are significantly reduced over the suburban station, with global mean value of 40 µg/m at 10 LT, for this period of the year.
本研究评估了西班牙东南部阿利坎特沿海地区的地面向下短波辐射（R）。使用了2010 - 2020年这十一年期间每小时收集的测量数据。位于该地区首府阿利坎特的两个气象站被选为城市和郊区类型的代表。另外还选择了两个远离城市的气象站代表农村类型。与在郊区和农村气象站记录的观测结果相比，冬季上午时段城市气象站的R显著降低，在当地时间10点时全球平均差异分别为 - 81和 - 120 W/m²。然而，在中午太阳照射时未获得显著差异，城市和农村气象站之间的全球平均差异为 - 20 W/m²。为了解释这些差异，本文研究了R与不同空气污染物（NO、SO₂以及细颗粒物（PM₂.₅和PM₁₀））之间的关系，以及在城市和郊区气象站测量的风场。本研究发现的结果表明R与NO浓度年周期之间存在密切关系，而这也受到研究区域观测到的盛行风环流的影响。在冬季当地时间10点时，城市气象站观测到的全球平均NO浓度为107 µg/m³。相比之下，在一年中的这个时期，这些高浓度在郊区气象站显著降低，当地时间10点时全球平均值为40 µg/m³。
