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

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Paul Herenz
  • Heike Wex
  • Silvia Henning
  • Thomas Bjerring Kristensen
  • Florian Rubach
  • Anja Roth
  • Stephan Borrmann
  • Heiko Bozem
  • Hannes Schulz
  • Frank Stratmann
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000429122900001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/acp-18-4477-2018
eISSN
1680-7324
Externe Identifier
  • Clarivate Analytics Document Solution ID: GB5RF
ISSN
1680-7316
Ausgabe der Veröffentlichung
7
Zeitschrift
ATMOSPHERIC CHEMISTRY AND PHYSICS
Paginierung
4477 - 4496
Datum der Veröffentlichung
2018
Status
Published
Titel
Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring-summer transition in May 2014
Sub types
  • Article
Ausgabe der Zeitschrift
18

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>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 100 nm. 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 500 cm−3, while cloud condensation nuclei (CCN) number concentrations were found to cover a range from less than 10 up to 250 cm−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 1200 m. During two of the four overflights, particle number concentrations at 3000 m were found to be up to 20 times higher than those measured below 2000 m; for one of these two flights, PNSDs measured above 2000 m 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. </jats:p>
Autoren
  • Paul Herenz
  • Heike Wex
  • Silvia Henning
  • Thomas Bjerring Kristensen
  • Florian Rubach
  • Anja Roth
  • Stephan Borrmann
  • Heiko Bozem
  • Hannes Schulz
  • Frank Stratmann
DOI
10.5194/acp-18-4477-2018
eISSN
1680-7324
Ausgabe der Veröffentlichung
7
Zeitschrift
Atmospheric Chemistry and Physics
Sprache
en
Online publication date
2018
Paginierung
4477 - 4496
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/acp-18-4477-2018
Datum der Datenerfassung
2020
Titel
Measurements of aerosol and CCN properties in the Mackenzie River delta (Canadian Arctic) during spring–summer transition in May 2014
Ausgabe der Zeitschrift
18

Datenquelle: Crossref

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