Impact of BEIS Biogenic Emissions Options on CMAQ Peak Ozone
Investigating the effects of using different BEIS biogenic emissions options on CMAQ peak ozone predictions. Results show significant reductions in ozone levels with BEIS biogenic emissions and BELD water fix. Offline BEIS biogenic emissions result in higher ozone levels over water compared to inline BEIS emissions.
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Presentation Transcript
1 Impacts on CMAQ Peak Ozone Predictions from using Different BEIS Biogenic Emissions Options April 22, 2019
2 This study is looking into The impact on CMAQ peak ozone predictions from using BELD water fix vs using the original BELD The impact on CMAQ peak ozone predictions from using inline BEIS biogenic emissions vs offline BEIS biogenic emissions
3 CMAQ version 5.2.1 2016 beta emissions (2016ff) for anthropogenic surface 2D emissions and 8 inline point sources emissions Four CMAQ simulations were conducted for the period of May to August 2016: Inline BEIS with original BELD Inline BEIS with BELD water fix Offline BEIS with original BELD Offline BEIS with BELD water fix 1. 2. 3. 4.
6 Greenwich, CT 090010017 Groton, CT 090110124 160 160 140 140 DMA8 Ozone (ppb) DMA8 Ozone (ppb) 120 120 100 100 CMAQ1 CMAQ1 80 80 CMAQ2 CMAQ2 60 60 Obs Obs Diff Diff 40 40 20 20 0 0 05/20/16 06/20/16 07/20/16 08/20/16 05/20/16 06/20/16 07/20/16 08/20/16 Date Date
8 Groton, CT 090110124 140 CMAQ4 Offline BEIS with BELD water fix CMAQ2 Inline BEIS with BELD water fix DMA8 Ozone (ppb) 120 100 80 Two runs are with identical GSPRO (B10C6) and B3GRD files CMAQ2 60 CMAQ4 40 Diff 20 0 05/20/16 06/20/16 07/20/16 Date 08/20/16
9 Summary CMAQ using BEIS biogenic emissions with BELD water fix can have nontrivial (30+ ppb) DMA8 ozone reductions, especially over Long Island Sound and along northeast shoreline. CMAQ using offline BEIS biogenic emissions tends to have higher DMA8 ozone over water, compared to using inline BEIS biogenic emissions.
