Measurements of equivalent black carbon (EBC) aerosols are presented for the first time from a high-altitude station Ranichauri (30°18′ N, 78°24′ E; 2200 m amsl) in the lesser Himalaya during January-December 2016. The influences of meteorology, fire emissions and transport, on [EBC] variations have been investigated here. The daily mean values of [EBC] are observed to vary from 0.04 ± 0.03 μgm⁻³ to 7.83 ± 2.66 μgm⁻³ with peak during April. A significant enhancement in [EBC] is observed towards the end of April, reaching the levels as high as 23.95 μgm⁻³ and attributed to fire emissions. Diurnal variations are suppressed with typically lower [EBC] levels during the summer monsoon (0.42 ± 0.25 μg m⁻³ in July) due to the transport of marine air mass and scavenging. On a seasonal basis, the average [EBC] levels are found to be higher during winter (2.72 ± 1.86 μgm⁻³) and pre-monsoon (2.56 ± 1.80 μg m⁻³), and lowest during the summer monsoon (0.89 ± 01.03 μg m⁻³).Our measurements in conjunction with the analysis of model meteorology (Era Interim reanalysis) show profound effects of boundary layer dynamics on EBC concentrations. Wintertime [EBC] maximum is suggested to be due to confinement of regional anthropogenic emissions in shallow boundary layer. In addition, transport from the North-West, and Western regions, characterized by wood-burning and fossil fuel combustion, also affected [EBC] the variations here, except during the summer monsoon.

2016年1月至12月，首次在小喜马拉雅山的高海拔站Ranichauri（北纬30°18′N，东经78°24′E； 2200 m amsl）测量了等效的黑碳（EBC）气溶胶。此处已经研究了气象，火灾排放和运输对[EBC]变化的影响。[EBC]的每日平均值都观察到变化从0.04±0.03μgm ^-3到7.83±2.66μgm ^-3四月期间与峰。在[EBC]甲显著增强朝向四月底观察到，在到达水平高达23.95μgm ^-3和归因于火的排放。在夏季季风期间，通常以较低的[EBC]水平抑制昼夜变化（0.42±0.25μgm ^-3在七月）由于海洋气团的运输和清除。按季节，平均[EBC]水平被发现是在冬季较高（2.72±1.86μgm ^-3）和预季风（2.56±1.80微克米^-3），和夏季风期间最低（0.89±01.03 μgm ^-3）。我们的测量与模型气象分析（时代中期再分析）一起显示了边界层动力学对EBC浓度的深远影响。冬季[EBC]最大值建议归因于浅边界层区域人为排放的限制。此外，以西北地区和西部地区为特征的运输（以木材燃烧和化石燃料燃烧为特征）也影响了[EBC]变化，除了夏季风。