Black Carbon (BC) absorbs the radiation and alters snow/ice albedo, which influences the Earth–Atmosphere radiation balance over the Arctic region. BC masses are estimated using Weather Research and Forecasting with Chemistry (WRF-CHEM) model over the Arctic region during the boreal winter and summer seasons of 2018. The meteorological parameters such as near surface temperature and relative humidity in WRF-CHEM are found to agree well with the observations. BC masses are found between 5–20 ng m⁻³ during boreal winter over most parts of the Arctic, while BC values are double in summer. Siberian and Canadian regions exhibit higher BC concentrations ($>30$ ng m⁻³) owing to the fire activities. BC produced by fires in the Alaska and Canadian regions of Arctic have lesser spread than BC form Siberian fires as the winds are mostly from east to west in winter. The model simulated BC is lower and higher than the observed BC during winter and summer respectively over Ny-Ålesund. However, the day to day variations can be captured by the model. The vertical profile of BC shows two peaks in winter, one at 1 km and the other strong peak at higher altitude of 12.5 km associated with long-range transport from mid-latitude and tropical regions, while in summer one peak at lower altitude is found. BC has large spatial variations in the Arctic which can significantly impact the Arctic as well as global climate.

黑碳 (BC) 吸收辐射并改变雪/冰反照率，从而影响北极地区的地球-大气辐射平衡。在 2018 年北方冬季和夏季期间，使用化学天气研究和预测 (WRF-CHEM) 模型估算了 BC 质量。发现 WRF-CHEM 中的近地表温度和相对湿度等气象参数一致很好的观察。在北极大部分地区的北方冬季，BC 质量在 5-20 ng m ^-3之间，而夏季的 BC 值是两倍。西伯利亚和加拿大地区表现出更高的 BC 浓度（$>30$ng m ^-3 ) 由于火灾活动。阿拉斯加和加拿大北极地区的火灾产生的 BC 比西伯利亚火灾的 BC 传播更小，因为冬天的风主要是从东到西。模型模拟的 BC 在冬季和夏季分别低于和高于 Ny-Ålesund 上观测到的 BC。但是，模型可以捕获每天的变化。BC 的垂直剖面在冬季有两个峰值，一个在 1 公里处，另一个强峰值在 12.5 公里的高海拔地区，与来自中纬度和热带地区的远距离传输有关，而在夏季，在低海拔地区发现了一个峰值. BC 在北极有很大的空间变化，这会对北极和全球气候产生重大影响。