Ozone Simula-on using Different Emission Inventories in Southeast Asia
Teerachai Amnuaylojaroen, Chiang Mai University Mary Barth, Louisa Emmons, NCAR Greg Carmichael, U. Iowa Jiemjai Kreasuwun, Chiang Mai University
Emission Inventory March CO Emissions December CO Emis. RETRO – 2000 411 kmol/km2/h 497 kmol/km2/h INTEX-‐B – 2006 396 406 MACCity – 2010 437 454 SEAC4RS – 2012 306 300 MACCity-‐SEAC4RS 319 320 Biomass Burning – 2008 718 59
MACCity-‐SEAC4RS Biomass Burning
MACCity -‐ MACCity-‐SEAC4RS SEAC4RS -‐ MACCity-‐SEAC4RS
RETRO -‐ MACCity-‐SEAC4RS INTEXB – MACCity-‐SEAC4RS
CO Emissions for March ! Lots of Biomass Burning
emissions
! 30% variaWon among anthropogenic inventories
Ensemble Mean and Varia-on Among Model Simula-ons using Different Emissions
Inventories for Surface Mixing Ra-os for March Average
! CO and O3 mixing raWos vary by
< 30% among different anthropogenic inventories
! NO mixing raWo varies much
more ! Inclusion of shipping emissions
is main reason
! The same outcome for December simula-on when biomass burning is small
Mean CO (ppbv)
Mean O3 (ppbv)
Mean NO (ppbv)
CO VariaWon (%)
O3 VariaWon (%)
NO VariaWon (%)
Emission Inventory
CO (ppbv) O3 (ppbv)
March December March December
RETRO – 2000 571 596 146 122
INTEX-‐B – 2006 575 497 156 119
MACCity – 2010 574 495 160 122
SEAC4RS – 2012 574 494 159 122
MACCity-‐SEAC4RS 575 495 154 115
Monthly-‐average mixing ra-os at land-‐based grid points in SE Asia
Comparison to Observa-ons ObservaWons: Thai monitoring sites, ozonesondes, MOPITT and OMI satellite data ! CO is underpredicted ! O3 is overpredicted ! NO2 column slightly underpredicted
• Not much variaWon between inventories • Biomass burning has big effect (March vs December) on surface mixing raWos
Comparison Among Emission Inventories
Comparison of CO, O3, and NO Among Model Simula-ons Using Different Emission Inventories over SE Asia
• All models underesWmated CO and overesWmated O3 for both a biomass burning period (March) and an anthropogenic period (December) – ConducWng a sensiWvity simulaWon with increased CO and NO emissions
• There was only slight variability CO and O3 mixing raWos among different anthropogenic emission inventories
• Biomass burning created more variability
• Paper under revision for ACP Amnuaylojaroen et al. (2014) Atmos. Chem. Phys. Discuss., 14, 9345-‐9400.
Inventories: RETRO, INTEX-‐B, MACCity, SEAC4RS, and MACCity-‐SEAC4RS