The AFWA dust emission scheme for the GOCART aerosol model in WRF-Chem v3.8.1
<p>Airborne particles of mineral dust play a key role in Earth's climate system and affect human activities around the globe. The numerical weather modeling community has undertaken considerable efforts to accurately forecast these dust emissions. Here, for the first time in the literatur...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-01-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://www.geosci-model-dev.net/12/131/2019/gmd-12-131-2019.pdf |
| Summary: | <p>Airborne particles of mineral dust play a key role in Earth's climate system
and affect human activities around the globe. The numerical weather modeling
community has undertaken considerable efforts to accurately forecast these
dust emissions. Here, for the first time in the literature, we thoroughly
describe and document the Air Force Weather Agency (AFWA) dust emission
scheme for the Georgia Institute of Technology–Goddard Global Ozone
Chemistry Aerosol Radiation and Transport (GOCART) aerosol model within the Weather Research and
Forecasting model with chemistry (WRF-Chem) and compare it to the other dust
emission schemes available in WRF-Chem. The AFWA dust emission scheme
addresses some shortcomings experienced by the earlier GOCART-WRF scheme.
Improved model physics are designed to better handle emission of fine dust
particles by representing saltation bombardment. WRF-Chem model performance
with the AFWA scheme is evaluated against observations of dust emission in
southwest Asia and compared to emissions predicted by the other schemes built
into the WRF-Chem GOCART model. Results highlight the relative strengths of
the available schemes, indicate the reasons for disagreement, and demonstrate
the need for improved soil source data.</p> |
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| ISSN: | 1991-959X 1991-9603 |