skip to main content

SciTech ConnectSciTech Connect

Title: Evaluation of the aerosol vertical distribution in global aerosol models through comparison against CALIOP measurements: AeroCom phase II results: AEROSOL PROFILES IN AEROCOM II GCM

The ability of eleven models in simulating the aerosol vertical distribution from regional to global scales, as part of the second phase of the AeroCom model inter-comparison initiative (AeroCom II) is assessed and compared to results of the first phase. The evaluation is performed using a global monthly gridded dataset of aerosol extinction profiles built on purpose from the CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) Layer Product 3.01. Results over 12 sub-continental regions show that five models improved whereas three degraded in reproducing the Zα 0-6 km mean extinction height diagnostic, which is computed over the 0-6 km altitude range for each studied region and season. While the models’ performance remains highly variable, it has generally improved in terms of inter-regional diversity and seasonality. The biases in Zα 0-6 km have notably decreased in the U.S. and European industrial and downwind maritime regions, whereas the timing of the Zα 0-6 km peak season has improved for all but two models. However, most of the models now show a Zα 0-6 km underestimation over land, notably in the dust and biomass burning regions in Asia and Africa. At global scale, the AeroCom II models better reproduce the Zα 0-6 km latitudinalmore » variability over ocean than over land. Hypotheses for the (changes in the) the performance of the individual models and for the inter-model diversity are discussed. We also provide an analysis of the CALIOP limitations and uncertainties that can contribute to the differences between the simulations and observations.« less
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [2] ;  [2] ;  [4] ;  [3] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [1] ;  [10] ;  [10] ;  [3] ;  [11] ;  [2] ;  [12] more »;  [13] ;  [14] ;  [9] ;  [2] ;  [14] ;  [9] ;  [15] ;  [16] ;  [17] ;  [5] ;  [18] ;  [19] ;  [20] « less
  1. European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra Italy
  2. Norwegian Meteorological Institute, Oslo Norway
  3. Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette France
  4. NASA Langley Research Center, MS/475, Hampton Virginia USA
  5. Center for Climate Systems Research, Columbia University, New York New York USA; NASA Goddard Institute for Space Studies, New York New York USA
  6. Department of Meteorology, University of Reading, Reading UK
  7. Department of Geosciences, University of Oslo, Oslo Norway; Center for International Climate and Environmental Research-Oslo (CICERO), Oslo Norway
  8. NASA Goddard Space Flight Center, Greenbelt Maryland USA; Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore Country Maryland USA
  9. NASA Goddard Space Flight Center, Greenbelt Maryland USA
  10. Pacific Northwest National Laboratory, Richland Washington USA
  11. Norwegian Meteorological Institute, Oslo Norway; Department of Geosciences, University of Oslo, Oslo Norway
  12. Pacific Northwest National Laboratory, Richland Washington USA; Now at University of Wyoming, Laramie Wyoming USA
  13. ETH-Zentrum, Zürich Switzerland
  14. Center for International Climate and Environmental Research-Oslo (CICERO), Oslo Norway
  15. Department of Physics, University of Oxford, Oxford UK
  16. Science Systems and Applications, Inc., Hampton Virginia USA
  17. Research Institute for Applied Mechanics, Kyushu University, Fukuoka Japan
  18. Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette France; Now at National Institute for Agronomic Research, Thiverval-Grignon France
  19. Pacific Northwest National Laboratory, Richland Washington USA; Now at Gwangju Institute of Science and Technology, Gwangju Korea
  20. Pacific Northwest National Laboratory, Richland Washington USA; Max Planck Institute for Meteorology, Hamburg Germany
Publication Date:
OSTI Identifier:
1324897
Report Number(s):
PNNL-SA-114059
Journal ID: ISSN 2169-897X; KP1703020
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research: Atmospheres; Journal Volume: 121; Journal Issue: 12
Publisher:
American Geophysical Union
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English