A multi-model assessment of pollution transport to the Arctic Metadata

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Title

  • Main Title A multi-model assessment of pollution transport to the Arctic

Creator

  • Author: Shindell, D T
    Creator Type: Personal
  • Author: Chin, M
    Creator Type: Personal
  • Author: Dentener, F
    Creator Type: Personal
  • Author: Doherty, R M
    Creator Type: Personal
  • Author: Faluvegi, G
    Creator Type: Personal
  • Author: Fiore, A M
    Creator Type: Personal
  • Author: Hess, P
    Creator Type: Personal
  • Author: Koch, D M
    Creator Type: Personal
  • Author: MacKenzie, I A
    Creator Type: Personal
  • Author: Sanderson, M G
    Creator Type: Personal
  • Author: Schultz, M G
    Creator Type: Personal
  • Author: Schulz, M
    Creator Type: Personal
  • Author: Stevenson, D S
    Creator Type: Personal
  • Author: Teich, H
    Creator Type: Personal
  • Author: Textor, C
    Creator Type: Personal
  • Author: Wild, O
    Creator Type: Personal
  • Author: Bergmann, D J
    Creator Type: Personal
  • Author: Bey, I
    Creator Type: Personal
  • Author: Bian, H
    Creator Type: Personal
  • Author: Cuvelier, C
    Creator Type: Personal
  • Author: Duncan, B N
    Creator Type: Personal
  • Author: Folberth, G
    Creator Type: Personal
  • Author: Horowitz, L W
    Creator Type: Personal
  • Author: Jonson, J
    Creator Type: Personal
  • Author: Kaminski, J W
    Creator Type: Personal
  • Author: Marmer, E
    Creator Type: Personal
  • Author: Park, R
    Creator Type: Personal
  • Author: Pringle, K J
    Creator Type: Personal
  • Author: Schroeder, S
    Creator Type: Personal
  • Author: Szopa, S
    Creator Type: Personal
  • Author: Takemura, T
    Creator Type: Personal
  • Author: Zeng, G
    Creator Type: Personal
  • Author: Keating, T J
    Creator Type: Personal
  • Author: Zuber, A
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: Lawrence Livermore National Laboratory
    Place of Publication: Livermore, California
    Additional Info: Lawrence Livermore National Laboratory (LLNL), Livermore, CA

Date

  • Creation: 2008-03-13

Language

  • English

Description

  • Content Description: We examine the response of Arctic gas and aerosol concentrations to perturbations in pollutant emissions from Europe, East and South Asia, and North America using results from a coordinated model intercomparison. These sensitivities to regional emissions (mixing ratio change per unit emission) vary widely across models and species. Intermodel differences are systematic, however, so that the relative importance of different regions is robust. North America contributes the most to Arctic ozone pollution. For aerosols and CO, European emissions dominate at the Arctic surface but East Asian emissions become progressively more important with altitude, and are dominant in the upper troposphere. Sensitivities show strong seasonality: surface sensitivities typically maximize during boreal winter for European and during spring for East Asian and North American emissions. Mid-tropospheric sensitivities, however, nearly always maximize during spring or summer for all regions. Deposition of black carbon (BC) onto Greenland is most sensitive to North American emissions. North America and Europe each contribute {approx}40% of total BC deposition to Greenland, with {approx}20% from East Asia. Elsewhere in the Arctic, both sensitivity and total BC deposition are dominated by European emissions. Model diversity for aerosols is especially large, resulting primarily from differences in aerosol physical and chemical processing (including removal). Comparison of modeled aerosol concentrations with observations indicates problems in the models, and perhaps, interpretation of the measurements. For gas phase pollutants such as CO and O{sub 3}, which are relatively well-simulated, the processes contributing most to uncertainties depend on the source region and altitude examined. Uncertainties in the Arctic surface CO response to emissions perturbations are dominated by emissions for East Asian sources, while uncertainties in transport, emissions, and oxidation are comparable for European and North American sources. At higher levels, model-to-model variations in transport and oxidation are most important. Differences in photochemistry appear to play the largest role in the intermodel variations in Arctic ozone sensitivity, though transport also contributes substantially in the mid-troposphere.
  • Physical Description: PDF-file: 54 pages; size: 1.3 Mbytes

Subject

  • Keyword: Removal
  • Keyword: Photochemistry
  • Keyword: Aerosols
  • Keyword: Transport
  • Keyword: Processing
  • Keyword: Altitude
  • Keyword: Sensitivity
  • STI Subject Categories: 58 Geosciences
  • Keyword: Oxidation
  • Keyword: Deposition
  • Keyword: Troposphere
  • Keyword: Ozone
  • Keyword: Carbon
  • Keyword: Pollution
  • Keyword: Pollutants

Source

  • Journal Name: Atmospheric Chemistry and Physics Discussions, vol. 8, N/A, September 10, 2008, pp. 5353-5372; Journal Volume: 8

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: LLNL-JRNL-402271
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 945150
  • Archival Resource Key: ark:/67531/metadc896985