Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The POLARCAT Model Intercomparison Project (POLMIP): overview and evaluation with observations
Vise andre og tillknytning
2015 (engelsk)Inngår i: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 15, nr 12, s. 6721-6744Artikkel i tidsskrift (Fagfellevurdert) Published
Resurstyp
Text
Abstract [en]

A model intercomparison activity was inspired by the large suite of observations of atmospheric composition made during the International Polar Year (2008) in the Arctic. Nine global and two regional chemical transport models participated in this intercomparison and performed simulations for 2008 using a common emissions inventory to assess the differences in model chemistry and transport schemes. This paper summarizes the models and compares their simulations of ozone and its precursors and presents an evaluation of the simulations using a variety of surface, balloon, aircraft and satellite observations. Each type of measurement has some limitations in spatial or temporal coverage or in composition, but together they assist in quantifying the limitations of the models in the Arctic and surrounding regions. Despite using the same emissions, large differences are seen among the models. The cloud fields and photolysis rates are shown to vary greatly among the models, indicating one source of the differences in the simulated chemical species. The largest differences among models, and between models and observations, are in NOy partitioning (PAN vs. HNO3) and in oxygenated volatile organic compounds (VOCs) such as acetaldehyde and acetone. Comparisons to surface site measurements of ethane and propane indicate that the emissions of these species are significantly underestimated. Satellite observations of NO2 from the OMI (Ozone Monitoring Instrument) have been used to evaluate the models over source regions, indicating anthropogenic emissions are underestimated in East Asia, but fire emissions are generally overestimated. The emission factors for wildfires in Canada are evaluated using the correlations of VOCs to CO in the model output in comparison to enhancement factors derived from aircraft observations, showing reasonable agreement for methanol and acetaldehyde but underestimate ethanol, propane and acetone, while overestimating ethane emission factors.

sted, utgiver, år, opplag, sider
2015. Vol. 15, nr 12, s. 6721-6744
HSV kategori
Forskningsprogram
Miljö
Identifikatorer
URN: urn:nbn:se:smhi:diva-1966DOI: 10.5194/acp-15-6721-2015ISI: 000357117500011OAI: oai:DiVA.org:smhi-1966DiVA, id: diva2:923367
Tilgjengelig fra: 2016-04-26 Laget: 2016-03-03 Sist oppdatert: 2017-11-30bibliografisk kontrollert

Open Access i DiVA

fulltext(5636 kB)89 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 5636 kBChecksum SHA-512
8b2e88af9e12ef9f981023222cb770964289700314b6493e161015facdfb8f4b6820c894b240fdbfac1cd5eefb9e93f2a4dd95d1773c2e59eea5f43d8d60d176
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekst

Personposter BETA

Langner, Joakim

Søk i DiVA

Av forfatter/redaktør
Langner, Joakim
Av organisasjonen
I samme tidsskrift
Atmospheric Chemistry And Physics

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 89 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 61 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.8
|