Abstract

We study the statistical relations between the black carbon (BC) content in the atmospheric column and the surface albedo (A), the values of which are available from MERRA-2 reanalysis data for four test areas near the Arctic coast of Russia in April 2010–2016. We also analyze the atmospheric meteorological parameters: air temperature and rainfall and snowfall amounts. The statistical analysis has been carried out using diurnally averaged parameters. An increase in the air temperature is accompanied everywhere by a decrease in the surface albedo, both on a monthly scale and in daily variations. Precipitation in the form of fresh snow increases the surface albedo. On the whole over 7 years, a significant negative correlation between BC and A in April was found in Nenets Autonomous okrug and on the Gydan Peninsula. Separate years (generally diverse for different areas) are revealed when day-to-day variations in A and BC correlate within a month, again with negative coefficients. We estimated possible albedo variations due to changes in different parameters, as well as variations in albedo radiative forcing.

中文翻译：

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春季俄罗斯北极地区的大气黑碳和表面反照率

摘要

我们研究了大气柱中黑碳（BC）含量与表面反照率（A）之间的统计关系，该值可从2010年4月在俄罗斯北极海岸附近的四个测试区的MERRA-2再分析数据中获得–2016年。我们还分析了大气气象参数：气温，降雨量和降雪量。使用每日平均参数进行统计分析。空气温度的升高伴随着表面反照率的降低，无论是按月还是按日变化。新鲜雪形式的降水增加了地表反照率。在整个7年中，BC和A之间存在显着的负相关今年四月，在涅涅茨自治区和吉丹半岛上被发现。当A和BC的每日变化在一个月之内相关时，就会显示出不同的年份（对于不同的地区通常是不同的），并且再次具有负系数。我们估计了由于不同参数的变化以及反照率辐射强迫的变化而可能引起的反照率变化。