Held, A, Brooks, IM, Leck, C et al. (1 more author) (2011) On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration. Atmospheric Chemistry and Physics, 11 (7). 3093 - 3105. ISSN 1680-7316
Abstract
We present direct eddy covariance measurements of aerosol number fluxes, dominated by sub-50 nm particles, at the edge of an ice floe drifting in the central Arctic Ocean. The measurements were made during the ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in August 2008 between 2-10° W longitude and 87-87.5° N latitude. The median aerosol transfer velocities over different surface types (open water leads, ice ridges, snow and ice surfaces) ranged from 0.27 to 0.68 mm s−1 during deposition-dominated episodes. Emission periods were observed more frequently over the open lead, while the snow behaved primarily as a deposition surface. Directly measured aerosol fluxes were compared with particle deposition parameterizations in order to estimate the emission flux from the observed net aerosol flux. Finally, the contribution of the open lead particle source to atmospheric variations in particle number concentration was evaluated and compared with the observed temporal evolution of particle number. The direct emission of aerosol particles from the open lead can explain only 5ĝ€"10% of the observed particle number variation in the mixing layer close to the surface.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2011, Held, A, Brooks, IM, Leck, C and Tjernstrom, M. This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. |
Keywords: | Arctic; ASCOS; Aerosol; Flux |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 10 Jan 2014 10:38 |
Last Modified: | 17 Jan 2018 01:59 |
Published Version: | http://dx.doi.org/10.5194/acp-11-3093-2011 |
Status: | Published |
Publisher: | European Geosciences Union |
Identification Number: | 10.5194/acp-11-3093-2011 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:77221 |