Cristin-resultat-ID: 1907793
Sist endret: 4. mai 2021, 12:10
Resultat
Vitenskapelig foredrag
2021

Springtime nitrogen oxides and tropospheric ozone in Svalbard: local and long-range transported air pollution

Bidragsytere:
  • Alena Dekhtyareva
  • Mark H. Hermanson
  • Anna Nikulina
  • Ove Hermansen
  • Tove Marit Svendby
  • Kim Holmén
  • mfl.

Presentasjon

Navn på arrangementet: EGU General Assembly 2021
Dato fra: 19. april 2021
Dato til: 30. april 2021

Arrangør:

Arrangørnavn: The European Geosciences Union

Om resultatet

Vitenskapelig foredrag
Publiseringsår: 2021

Beskrivelse Beskrivelse

Tittel

Springtime nitrogen oxides and tropospheric ozone in Svalbard: local and long-range transported air pollution

Sammendrag

Svalbard is a near pristine Arctic environment, where long-range transport from mid-latitudes is an important air pollution source. Thus, several previous studies investigated the background nitrogen oxides (NO x ) and tropospheric ozone (O 3 ) springtime chemistry in the region. However, there are also local anthropogenic emission sources on the archipelago such as coal power plants, ships and snowmobiles, which may significantly alter in situ atmospheric composition. Measurement results from three independent research projects were combined to identify the effect of emissions from various local sources on the background concentration of NO x and O 3 in Svalbard. The hourly meteorological and chemical data from the ground-based stations in Adventdalen, Ny-Ålesund and Barentsburg were analysed along with daily radiosonde soundings and weekly data from O 3 sondes. The data from the ERA5 reanalysis were used to evaluate the prevailing synoptic conditions during the fieldwork. Although the correlation between the NO x concentrations in the three settlements was low due to dominant influence of the local atmospheric circulation, cases with common large-scale meteorological conditions increasing the local pollutant concentration at all sites were identified. In colder and calmer days and days with temperature inversions, the concentrations of NO x were higher. In contrast to NO x values, O 3 concentrations in Barentsburg and at the Zeppelin station in Ny-Ålesund correlated strongly, and hence the prevailing synoptic situation and long-range transport of air masses were controlling factors for them. The Lagrangian models HYSPLIT and FLEXPART have been used to investigate air mass transport and transformations during the large scale O 3 depletion and enrichment events. The factors affecting Arctic springtime photochemistry of O 3 have been investigated thoroughly using Lagrangian and Eulerian numerical weather prediction model data and Metop GOME-2 satellite observations.

Bidragsytere

Aktiv cristin-person

Alena Dekhtyareva

  • Tilknyttet:
    Forfatter
    ved Geofysisk institutt ved Universitetet i Bergen

Mark H. Hermanson

  • Tilknyttet:
    Forfatter
    ved USA

Anna NIkulina

Bidragsyterens navn vises på dette resultatet som Anna Nikulina
  • Tilknyttet:
    Forfatter
    ved Arctic and Antarctic Research Institute

Ove Hermansen

  • Tilknyttet:
    Forfatter
    ved Måle- og instrumentteknologi ved NILU - Norsk institutt for luftforskning

Tove Marit Svendby

  • Tilknyttet:
    Forfatter
    ved Atmosfære og klima ved NILU - Norsk institutt for luftforskning
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