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Remote sensing of aerosols in the Arctic for an evaluation of global climate model simulations

Glantz, Paul (author)
Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM),Stockholm University, Sweden
Bourassa, Adam (author)
University of Saskatchewan, Canada
Herber, Andreas (author)
Alfred Wegener Institute Polar and Marine Research, Bremerhaven, Germany
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Iversen, Trond (author)
ECMWF, Reading, UK; Norwegian Meteorological Institute, Oslo, Norway
Karlsson, Johannes (author)
Stockholms universitet,Meteorologiska institutionen (MISU),Stockholm University, Sweden
Kirkevåg, Alf (author)
Norwegian Meteorological Institute, Oslo, Norway
Maturilli, Marion (author)
Alfred Wegener Institute Polar and Marine Research, Bremerhaven, Germany
Seland, Øyvind (author)
Norwegian Meteorological Institute, Oslo, Norway
Stebel, Kerstin (author)
Norwegian Institute for Air Research, Oslo, Norway
Struthers, Hamish (author)
National Supercomputer Centre, Linköping University
Tesche, Matthias (author)
Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM),Stockholm University, Sweden
Thomason, Larry (author)
NASA Langley Research Center, Hampton, Virginia, USA
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 (creator_code:org_t)
Wiley-Blackwell, 2014
2014
English.
In: Journal of Geophysical Research - Atmospheres. - : Wiley-Blackwell. - 2169-897X .- 2169-8996. ; 119:13, s. 8169-8188
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • In this study Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua retrievals of aerosol optical thickness (AOT) at 555 nm are compared to Sun photometer measurements from Svalbard for a period of 9 years. For the 642 daily coincident measurements that were obtained, MODIS AOT generally varies within the predicted uncertainty of the retrieval over ocean (Delta AOT = +/- 0.03 +/- 0.05 . AOT). The results from the remote sensing have been used to examine the accuracy in estimates of aerosol optical properties in the Arctic, generated by global climate models and from in situ measurements at the Zeppelin station, Svalbard. AOT simulated with the Norwegian Earth System Model/Community Atmosphere Model version 4 Oslo global climate model does not reproduce the observed seasonal variability of the Arctic aerosol. The model overestimates clear-sky AOT by nearly a factor of 2 for the background summer season, while tending to underestimate the values in the spring season. Furthermore, large differences in all-sky AOT of up to 1 order of magnitude are found for the Coupled Model Intercomparison Project phase 5 model ensemble for the spring and summer seasons. Large differences between satellite/ground-based remote sensing of AOT and AOT estimated from dry and humidified scattering coefficients are found for the subarctic marine boundary layer in summer.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Keyword

Arctic aerosol; aerosol optical thickness; model simulation; remote sensing of aerosol; marine aerosol

Publication and Content Type

ref (subject category)
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