1. Preliminary results of the KORUS-AQ campaign
(1 May – 14 June 2016)
Rokjin Park1, Jaein I Jeong1, Duseong S. Jo1, Seungun Lee1, Hyunmin Kim1, Joon-Young Ahn2, James Crawford3, Jhoon Kim4, Gangwoong Lee5, Jay Al-Saadi3, Louisa Emmons6, Barry Lefer7, You-Deog Hong2, Jung-Hun Woo8, Chul Song9, Chang-Keun Song10, KORUS-AQ team
1 Seoul National University,2 National Institute of Environmental Research, South Korea, 3 NASA Langley Research Center,4 Yonsei University, 5 Hankuk University of Foreign Studies,
6 National Center for Atmospheric Research, 7 NASA Headquarters, 8 Konkuk University, 9 GIST, 10 UNIST
The 8th International GEOS-Chem meeting, Harvard University, May 3, 2017

2. KORUS-AQ combined assets from the Korean and U. S
KORUS-AQ combined assets from the Korean and U.S. atmospheric science communities and their supporting organizations (NIER, NASA, Universities, etc.) to implement an integrated observing system for improving our understanding of Air Quality
Airborne sampling
provides critical view for evaluation strategies in connecting ground-based and satellite observations
Short term
Satellites
- provide broad coverage, continuity
- but it needs reliable information on near-surface exposure.
KORUS-AQ Goals
Improve capability for satellite remote sensing of air quality
Better understanding of the factors controlling air quality
Test and improve model simulation of air quality
Modeling
- provide Air quality forecasting and warning service
- but it needs reliable information on emission inventory and so on.
Ground monitoring
It will continue to be the primary method
for monitoring exposure.
Coverage is limited.

3. Multiplatform Observation

4. Summary of Integrated observation
Participants
130 research group, 580 participants
Aircraft
DC-8 : 20 flight, 150 hr, measured over 200 air pollutants and parameters
B200 : 30 flight, 124 hr, carried GEO-TASO simulator
Hanseo Kingair : 32 flight, 120 hr, support B200 and flied near point source
Ground
3 major sites : BN Island, Olympic Park and Taewha
5 NIER supersite, 3 NIMR monitoring site, 5 other site
Remote sensing
18 AERONET site, 8 Pandora site, 6 LIDAR site
Ozone Lidar in Taewha, HSRL in Seoul
Vessel
Kissing(NIMR) : traveled back and forth Incheon to Mokpo, 17 times
Onnuri : KORUS-OC
Modeling
10 models
Satellites
GOCI, OMI, MODIS, CALIPSO, IASI, etc.

5. Daily surface PM2.5 over Korea during the KORUS-AQ: Model Intercomparison
PM2.5 [µg m-3]

6. Daily surface PM2. 5 at Olympic Park during the KORUS-AQ: GEOS-Chem vs
Daily surface PM2.5 at Olympic Park during the KORUS-AQ: GEOS-Chem vs. Observations
Stagnant
Extreme
Pollution
Blocking
Dynamic
Weather
R = NMB = -22.5%
Observation
Model
PM2.5 [µg m-3]
The model appears to reproduce daily variability of PM2.5 concentrations. Is this for right reasons?

7. OA underestimation cancels out nitrate overestimation in the model
Nitrate OA Nitrate + OA
Sung-eun Lee will give a poster presentation (C21) on nitrate overestimation in the model this afternoon.

8. GEOS-Chem v10.1 evaluations of carbonaceous aerosols
and parent VOCs
Black carbon
OA (Jo et al.)
OA (Hodzic et al.)
OA (GC v.10.1)
μgC sm-3
μg sm-3
μg sm-3
μg sm-3
Isoprene
Toluene
Benzene
Monoterpene
ppbv
ppbv
ppbv
ppbv

9. OA vs. Toluene
[μg sm-3]
[ppbv]

10. OA vs. Acetonitrile
[μg sm-3]
[pptv]

11. THANK YOU