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Discussion papers | Copyright
https://doi.org/10.5194/acp-2018-284
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 09 May 2018

Research article | 09 May 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Quantifying the Direct Radiative Effect of Absorbing Aerosols for Numerical Weather Prediction: A case study

Mayra I. Oyola1, James R. Campbell2, Peng Xian2, Anthony Bucholtz2, Richard A. Ferrare3, Sharon P. Burton3, Olga Kalashnikova4, Benjamin C. Ruston2, and Simone Lolli5 Mayra I. Oyola et al.
  • 1American Society for Engineering Excellence, Monterey, CA, 93943, USA
  • 2US Naval Research Laboratory, Monterey, CA, 93943, USA
  • 3NASA Langley Research Center, Langley, VA, 23365, USA
  • 4NASA Jet Propu lsion Laboratory, Pasadena, CA, 91109, USA
  • 5CNR-IMAA, Istituto di Metodologie per l'Analisi Ambien tale, Tito Scalo (PZ), Italy

Abstract. We conceptualize aerosol radiative transfer processes arising from the hypothetical coupling of a global aerosol transport model and global numerical weather prediction model by applying the U.S. Naval Research Laboratory Navy Aerosol Analysis and Prediction System (NAAPS) and the Navy Global Environmental Model (NAVGEM) meteorological and surface reflectance fields. A unique experimental design during the 2013 NASA Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) field mission, allows for collocated airborne sampling by the Langley's High Spectral Resolution Lidar (HSRL), the Airborne Multi-angle Spectro Polarimetric Imager (AirMSPI), up/down SW and broadband IR radiometers, as well as NASA A-Train support from the Moderate Resolution Imaging Spectroradiometer (MODIS), to attempt direct aerosol forcing closure. The results demonstrate the sensitivity of modeled fields to aerosol radiative fluxes and heating rates, specifically in the SW forcing and heating rates, as induced in this event from transported smoke and regional urban aerosols. Limitations are identified with respect to aerosol attribution, vertical distribution and choice of optical and surface polarimetry properties, which are discussed within the context of their influence on Numerical Weather Prediction output that is particularly important as the community propels forward towards inline aerosol modelling within global forecast systems.

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Mayra I. Oyola et al.
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Latest update: 15 Jul 2018
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Short summary
We conceptualized the aerosol radiative impact of an inline aerosol analysis field coupled with a global meteorological forecast system utilizing NAAPS and NAVGEM analysis and surface albedo fields. Model simulations were compared with in situ validation data collected during the NASA 2013 SEAC4RS experiment. Instantaneous heating rates peaked around 7 K day−1 in the lower part of the troposphere, while the HSRL profiles resulted in values of up to 18 K day−1 in the in the mid troposphere.
We conceptualized the aerosol radiative impact of an inline aerosol analysis field coupled with...
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