Publication Abstracts

Kim et al. 2014

Kim, D., M. Chin, H. Yu, T. Diehl, Q. Tan, R.A. Kahn, K. Tsigaridis, S.E. Bauer, T. Takemura, L. Pozzoli, N. Bellouin, M. Schulz, S. Peyridieu, A. Chédin, and B. Koffi, 2014: Sources, sinks, and transatlantic transport of North African dust aerosol: A multi-model analysis and comparison with remote-sensing data. J. Geophys. Res. Atmos., 119, no. 10, 6259-6277, doi:10.1002/2013JD021099.

This study evaluates model-simulated dust aerosols over North Africa and the North Atlantic from five global models that participated in the Aerosol Comparison between Observations and Models phase II model experiments. The model results are compared with satellite aerosol optical depth (AOD) data from Moderate Resolution Imaging Spectroradiometer (MODIS), Multiangle Imaging Spectroradiometer (MISR), and Sea-viewing Wide Field-of-view Sensor, dust optical depth (DOD) derived from MODIS and MISR, AOD and coarse-mode AOD (as a proxy of DOD) from ground-based Aerosol Robotic Network Sun photometer measurements, and dust vertical distributions/centroid height from Cloud Aerosol Lidar with Orthogonal Polarization and Atmospheric Infrared Sounder satellite AOD retrievals. We examine the following quantities of AOD and DOD: (1) the magnitudes over land and over ocean in our study domain, (2) the longitudinal gradient from the dust source region over North Africa to the western North Atlantic, (3) seasonal variations at different locations, and (4) the dust vertical profile shape and the AOD centroid height (altitude above or below which half of the AOD is located). The different satellite data show consistent features in most of these aspects; however, the models display large diversity in all of them, with significant differences among the models and between models and observations. By examining dust emission, removal, and mass extinction efficiency in the five models, we also find remarkable differences among the models that all contribute to the discrepancies of model-simulated dust amount and distribution. This study highlights the challenges in simulating the dust physical and optical processes, even in the best known dust environment, and stresses the need for observable quantities to constrain the model processes.

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BibTeX Citation

@article{ki07100r,
  author={Kim, D. and Chin, M. and Yu, H. and Diehl, T. and Tan, Q. and Kahn, R. A. and Tsigaridis, K. and Bauer, S. E. and Takemura, T. and Pozzoli, L. and Bellouin, N. and Schulz, M. and Peyridieu, S. and Chédin, A. and Koffi, B.},
  title={Sources, sinks, and transatlantic transport of North African dust aerosol: A multi-model analysis and comparison with remote-sensing data},
  year={2014},
  journal={J. Geophys. Res. Atmos.},
  volume={119},
  number={10},
  pages={6259--6277},
  doi={10.1002/2013JD021099},
}

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RIS Citation

TY  - JOUR
ID  - ki07100r
AU  - Kim, D.
AU  - Chin, M.
AU  - Yu, H.
AU  - Diehl, T.
AU  - Tan, Q.
AU  - Kahn, R. A.
AU  - Tsigaridis, K.
AU  - Bauer, S. E.
AU  - Takemura, T.
AU  - Pozzoli, L.
AU  - Bellouin, N.
AU  - Schulz, M.
AU  - Peyridieu, S.
AU  - Chédin, A.
AU  - Koffi, B.
PY  - 2014
TI  - Sources, sinks, and transatlantic transport of North African dust aerosol: A multi-model analysis and comparison with remote-sensing data
JA  - J. Geophys. Res. Atmos.
VL  - 119
IS  - 10
SP  - 6259
EP  - 6277
DO  - 10.1002/2013JD021099
ER  -

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