Effects of different aerosol types on surface UV radiation in the 21st century

IF 3.7 2区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
A. Chatzopoulou , K. Tourpali , A.F. Bais , P. Braesicke
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引用次数: 0

Abstract

This study aims at quantifying the effect of different aerosol types on sunburning solar ultraviolet (UV) radiation, quantified by the UV Index (UVI), using global simulations with a radiative transfer model which are based on aerosol optical depth data derived from the GFDL-ESM4 model. The reductions in UV radiation due to the presence of aerosols show a strong regional variability, with the largest effect caused by organic aerosols and dust, followed by black carbon, while sulfates and sea salt have a minor influence. In the 1950s and 1990s decreases in the UVI are dominated by the presence of organic aerosols mainly over Western S. America (−3.9 UVI units) and South and East Asia (−1.9), as well as by dust in Northern Africa (−3.8). Despite its low optical depth (0.08), the effect of black carbon on UVI is significant in specific regions (e.g., Central Africa and South and East Asia in the 1950s and India in the 1990s.
Aerosol decreases from the 1990s to the 2090s under the SSP1–2.6 scenario result in UVI increases, by up to ∼5 over South and East Asia due to decreases in organics and black carbon. Under SSP3–7.0, the UVI changes are mostly negative worldwide, primarily due to increases in organics. Finally, under SSP5–8.5, UVI increases mainly in Asia, Europe, and the Southern S. America due to decreases in black carbon, sulfates, dust and organics, while in other regions the UVI changes are negative driven by increases in organics.
21世纪不同气溶胶类型对地表紫外线辐射的影响
本研究利用基于GFDL-ESM4模式的气溶胶光学深度数据的辐射传输模式进行全球模拟,旨在量化不同气溶胶类型对太阳晒伤紫外线(UV)辐射的影响,紫外线指数(UVI)可以量化紫外线辐射。由于气溶胶的存在而导致的紫外线辐射减少显示出很强的区域变异性,其中有机气溶胶和灰尘造成的影响最大,其次是黑碳,而硫酸盐和海盐的影响较小。在20世纪50年代和90年代,UVI的减少主要是由于有机气溶胶的存在,主要是在美国西部(- 3.9 UVI单位)和南亚和东亚(- 1.9),以及北非的沙尘(- 3.8)。尽管黑碳的光学深度很低(0.08),但在特定区域(例如1950年代的中非、南亚和东亚以及1990年代的印度)黑碳对紫外线的影响是显著的。在SSP1-2.6情景下,从20世纪90年代到20世纪90年代气溶胶减少导致紫外线指数增加,由于有机物和黑碳的减少,南亚和东亚地区的紫外线指数最多增加~ 5。在SSP3-7.0条件下,全球范围内UVI变化基本为负,主要是由于有机物的增加。在SSP5-8.5下,由于黑碳、硫酸盐、粉尘和有机物的减少,UVI主要在亚洲、欧洲和南美南部增加,而在其他地区,UVI的变化是由有机物的增加负驱动的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Atmospheric Environment
Atmospheric Environment 环境科学-环境科学
CiteScore
9.40
自引率
8.00%
发文量
458
审稿时长
53 days
期刊介绍: Atmospheric Environment has an open access mirror journal Atmospheric Environment: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Atmospheric Environment is the international journal for scientists in different disciplines related to atmospheric composition and its impacts. The journal publishes scientific articles with atmospheric relevance of emissions and depositions of gaseous and particulate compounds, chemical processes and physical effects in the atmosphere, as well as impacts of the changing atmospheric composition on human health, air quality, climate change, and ecosystems.
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