Impact of summertime anthropogenic emissions on atmospheric black carbon at Ny-Ålesund in the Arctic

Polar research

Yuan Gao¹  Jianqiong Zhan³ 

[1] Environmental Sciences, Rutgers University, 101 Warren Street, Newark NJ 07102, USA;Environmental Sciences, Rutgers University, 101 Warren Street, Newark NJ 07102, USACorrespondence;Department of Earth &

关键词: Equivalent black carbon;    Ny-Ålesund;    human influences;    transport efficiency.;   

DOI  :  10.3402/polar.v33.21821

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Measurements of equivalent black carbon (EBC), calculated from aethalometer measurements of light attenuation, were carried out in July 2011 at Ny-Ålesund in the Arctic. Highly elevated EBC concentrations were observed within the settlement of Ny-Ålesund, with a median value of 17 ng m−3, which was about two times the background level. Results from the ensemble empirical mode decomposition method suggested that about 60–80% of atmospheric EBC concentrations at Ny-Ålesund were from local emissions, while only 20–40% arrived via atmospheric transport. The estimated average local emission rate was 8.1 g h−1, with an uncertainty of approximately a factor of two. The pollution plume was confined to 10 km downwind of the settlement, with the total EBC deposition estimated to be 6.4–44 ng m−2 h−1. This may affect snow black carbon (BC) concentrations in nearby glaciated areas. The efficiencies of the long-range transport were estimated based on cluster analysis and potential precipitation contribution function, ...

【 授权许可】

CC BY-NC