北极的大气污染一直是那里持续气候变化的重要驱动力。北极气溶胶的增加导致北极雾霾和北极放大现象。我们对气溶胶光学深度(AOD)的分析,黑碳(BC),和使用地面的灰尘,卫星,2003年至2019年北极地区的再分析数据显示,格陵兰岛和中央北极地区的数量最低。有高AOD,BC,欧亚大陆北部和北美部分地区的灰尘。所有气溶胶在春季都显示出最高值。在美国西北部和亚洲北部发现AOD(>0.003year-1)和BC(0.0002-0.0003year-1)的显着正趋势。北极中部地区的灰尘(-0.0001year-1)出现了明显的负面趋势。AOD的季节性分析,BC,在北极地区,沙尘在夏季呈增加趋势,春季呈减少趋势。气溶胶的主要来源是附近的欧洲,俄罗斯,和北美地区,使用潜在来源贡献函数(PSCF)评估。运输中的人为排放,能源,和家庭部门以及野火等自然来源有助于北极气溶胶的积极趋势。北极地区这些不断增加的气溶胶通过辐射效应影响北极的放大。这里,我们发现北极中部的净气溶胶辐射强迫很高,格陵兰,西伯利亚,加拿大北极,约2-4W/m2,可影响区域温度。因此,我们的研究可以帮助在地球这个环境脆弱的地区缓解北极雾霾和北极放大的政策决定。
Atmospheric pollution in the Arctic has been an important driver for the ongoing climate change there. Increase in the Arctic aerosols causes the phenomena of Arctic haze and Arctic amplification. Our analysis of aerosol optical depth (AOD), black carbon (BC), and dust using ground-based, satellite, and reanalysis data in the Arctic for the period 2003-2019 shows that the lowest amount of all these is found in Greenland and Central Arctic. There is high AOD, BC, and dust in the northern Eurasia and parts of North America. All aerosols show their highest values in spring. Significant positive trends in AOD (> 0.003 year-1) and BC (0.0002-0.0003 year-1) are found in the northwestern America and northern Asia. Significant negative trends are observed for dust (- 0.0001 year-1) around Central Arctic. Seasonal analysis of AOD, BC, and dust reveals an increasing trend in summer and decreasing trend in spring in the Arctic. The major sources of aerosols are the nearby Europe, Russia, and North America regions, as assessed using the potential source contribution function (PSCF). Anthropogenic emissions from the transport, energy, and household sectors along with natural sources such as wildfires contribute to the positive trends of aerosols in the Arctic. These increasing aerosols in the Arctic influence Arctic amplification through radiative effects. Here, we find that the net aerosol radiative forcing is high in Central Arctic, Greenland, Siberia, and Canadian Arctic, about 2-4 W/m2, which can influence the regional temperature. Therefore, our study can assist policy decisions for the mitigation of Arctic haze and Arctic amplification in this environmental fragile region of the Earth.