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Open AccessArticle

Improved Dust Emission Reduction Factor in the ADAM2 Model Using Real-Time MODIS NDVI

National Institute of Meteorological Sciences, 33 Seohobuk-ro, Seogwipo-si, Jeju-do 63568, Korea
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Atmosphere 2019, 10(11), 702; https://doi.org/10.3390/atmos10110702
Received: 11 October 2019 / Revised: 10 November 2019 / Accepted: 11 November 2019 / Published: 13 November 2019
(This article belongs to the Special Issue Recent Advances of Air Pollution Studies in South Korea)
The Korea Meteorological Administration has employed the Asian Dust Aerosol Model 2 (ADAM2) to forecast Asian dust events since 2010, where the dust emission flux is proportional to the fourth power of the friction velocity. Currently, the dust emission reduction factor (RF) is determined by the normalized difference vegetation index (NDVI). This study aims to improve the forecasting capability of ADAM2 by developing a daily dust RF using both monthly (January 2007 to December 2016) and real-time moderate resolution imaging spectroradiometer (MODIS) NDVI data. We also developed a look-up table to transform the RF using NDVI and a system to update the RF by producing MODIS NDVI data for the last 30 days. Using these data, new RFs can be produced every day. To examine the impact of RF modification, the current (CTL) and new (EXP) RFs are compared during the period from March to May 2017. The simulations are verified by ground-based PM10 observations from China and Korea. Accordingly, root mean square errors (RMSEs) are reduced by 11.58% when RF is updated using real-time NDVI data. The results suggest that recent daily NDVI data contribute positively to the forecasting ability of ADAM2, in the dust source and downwind regions. View Full-Text
Keywords: Asian dust aerosol model 2; dust emission reduction factor; normalized difference vegetation index; MODIS Asian dust aerosol model 2; dust emission reduction factor; normalized difference vegetation index; MODIS
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Lee, S.-S.; Lim, Y.-K.; Cho, J.H.; Lee, H.C.; Ryoo, S.-B. Improved Dust Emission Reduction Factor in the ADAM2 Model Using Real-Time MODIS NDVI. Atmosphere 2019, 10, 702.

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