Correspondence
Measurements of equivalent black carbon (EBC), calculated from aethal-ometer 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 m3, which wa...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.644.325 http://www.polarresearch.net/index.php/polar/article/download/21821/pdf_1/ |
| Summary: | Measurements of equivalent black carbon (EBC), calculated from aethal-ometer 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 m3, which was about two times the background level. Results from the ensemble empirical mode decomposition method suggested that about 6080 % of atmospheric EBC concentrations at Ny-Ålesund were from local emissions, while only 2040 % arrived via atmospheric transport. The estimated average local emission rate was 8.1 g h1, 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 6.444 ng m2 h1. 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, and the |
|---|