English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring-summer transition in May 2014

Herenz, P., Wex, H., Henning, S., Kristensen, T. B., Rubach, F., Roth, A., et al. (2018). Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring-summer transition in May 2014. Atmospheric Chemistry and Physics, 18(7), 4477-4496. doi:10.5194/acp-18-4477-2018.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Herenz, Paul1, Author
Wex, Heike1, Author
Henning, Silvia1, Author
Kristensen, Thomas Bjerring1, Author
Rubach, Florian2, Author              
Roth, Anja2, Author              
Borrmann, Stephan2, Author              
Bozem, Heiko1, Author
Schulz, Hannes1, Author
Stratmann, Frank1, Author
Affiliations:
1external, ou_persistent22              
2Particle Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826291              

Content

show
hide
Free keywords: -
 Abstract: Within the framework of the RACEPAC (Radiation–Aerosol–Cloud Experiment in the Arctic Circle) project, the Arctic aerosol, arriving at a ground-based station in Tuktoyaktuk (Mackenzie River delta area, Canada), was characterized during a period of 3 weeks in May 2014. Basic meteorological parameters and particle number size distributions (PNSDs) were observed and two distinct types of air masses were found. One type were typical Arctic haze air masses, termed accumulation-type air masses, characterized by a monomodal PNSD with a pronounced accumulation mode at sizes above 100nm. These air masses were observed during a period when back trajectories indicate an air mass origin in the north-east of Canada. The other air mass type is characterized by a bimodal PNSD with a clear minimum around 90 nm and with an Aitken mode consisting of freshly formed aerosol particles. Back trajectories indicate that these air masses, termed Aitken-type air masses, originated from the North Pacific. In addition, the application of the PSCF receptor model shows that air masses with their origin in active fire areas in central Canada and Siberia, in areas of industrial anthropogenic pollution (Norilsk and Prudhoe Bay Oil Field) and the north-west Pacific have enhanced total particle number concentrations (NCN). Generally, NCN ranged from 20 to 500cm−3, while cloud condensation nuclei (CCN) number concentrations were found to cover a range from less than 10 up to 250cm−3 for a supersaturation (SS) between 0.1 and 0.7%. The hygroscopicity parameter κ of the CCN was determined to be 0.23 on average and variations in κ were largely attributed to measurement uncertainties. Furthermore, simultaneous PNSD measurements at the ground station and on the Polar 6 research aircraft were performed. We found a good agreement of ground-based PNSDs with those measured between 200 and 1200m. During two of the four overflights, particle number concentrations at 3000m were found to be up to 20 times higher than those measured below 2000m; for one of these two flights, PNSDs measured above 2000m showed a different shape than those measured at lower altitudes. This is indicative of long-range transport from lower latitudes into the Arctic that can advect aerosol from different regions in different heights.

Details

show
hide
Language(s): eng - English
 Dates: 2018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000429122900001
DOI: 10.5194/acp-18-4477-2018
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Atmospheric Chemistry and Physics
  Abbreviation : ACP
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Göttingen : Copernicus Publications
Pages: - Volume / Issue: 18 (7) Sequence Number: - Start / End Page: 4477 - 4496 Identifier: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016