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ITCT 2K2 Data Workshop March 5-6, 2003 - Boulder, Colorado

Integrated analysis of continental outflow and transpacific transport of Asian pollution using aircraft and satellite measurements. Rynda Hudman Colette Heald Daniel Jacob. ITCT 2K2 Data Workshop March 5-6, 2003 - Boulder, Colorado. Research Question & Approach.

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ITCT 2K2 Data Workshop March 5-6, 2003 - Boulder, Colorado

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  1. Integrated analysis of continental outflow and transpacific transport of Asian pollution using aircraft and satellite measurements Rynda Hudman Colette Heald Daniel Jacob ITCT 2K2 Data Workshop March 5-6, 2003 - Boulder, Colorado

  2. Research Question & Approach • What are the sources of transpacific pollution plumes and how do these plumes chemically evolve as they cross the Pacific? - Contribution from fuels vs. biomass burning sources - Ozone production in plumes - Interannual variability (2001: TRACE-P vs. 2002: ITCT-2K2) - Surface Air Quality (Jaegle, Carmichael, Goldstein, Jaffe) • Approach: - GEOS-CHEM simulation of ITCT-2K2/PEACE-B Period - Integration with ITCT-2K2, PEACE-B, TRACE-P, and MOPITT observations • Today: - May 5th plume; outflow: PEACE-B, transpacific transport: MOPITT, and comparison to February 22nd-27th TRACE-P plume

  3. NOAA WP-3D Flight5/5/2002122 - 125 deg west Altitude (km) (D. Parrish)

  4. Evolution of May 5th Event (GEOS-CHEM Asian CO and O3 Tropospheric columns) Difference between standard simulation and sensitivity simulation with Asian FF and BB shut off April 30, 2002 00Z May 4, 2002 00Z May 6, 2002 00Z L CO H L O3 H Plume encounters a H Pressure System and splits Elevated CO and O3 reaches North America Outflow exported via WCB

  5. PEACE-B: April 29,2002 (2-6 UTC) CO O3 Alt ~190 ppbv Lat:34N-36N Lon:130E-140E 135E Trop Column O3 Trop Column CO 30N 40N 100 – 220 ppbv CO GEOS-CHEM April 29, 2002 06Z

  6. GEOS-CHEM FORECAST ASIAN CO18 UTC, May 5, 2002 Asian FF CO, 500 hPa Asian FF/BB CO along 124°W Asian BB CO, 300 hPa Q. Li, R. Yantosca, D. Jacob, Harvard U. L. Jaeglé, U. Washington

  7. Ozone&CO enhancement of May 5th plume: Fossil Fuel and Biomass Burning Influences Ozone enhancement displaced upward and southward with respect to CO Ozone is enhanced in both FF and BB plumes but more strongly in BB Asian Ozone along 135W Asian CO along 135W

  8. Biomass Burning Inventory using TRMM VIRS Prasad Kasibhatla and Louis Giglio

  9. Heald et al. 2003 MOPITT vs GEOS-CHEM during TRACE-P: Mean CO Columns for February – April 2001 Model is high (avg=18%) over SE Asia BB too high Heald et al. 2003 Palmer et al. 2003

  10. MOPITT vs GEOS-CHEM during ITCT-2K2: Mean CO Columns for April 20-May 19

  11. Heald et al. 2003 MOPITT CO column observations: Feb 26-27, 2001 TRACE-P transpacific plume GEOS-CHEM xAVG KERNAL GEOS-CHEM (12 UTC) MOPITT Asian pollution exported via cold front Feb 23 Feb 24 Plume encounters a blocking H Pressure System and splits Feb 25 Feb 26 Elevated CO reaches North America Southern branch at low latitudes produces O3 Feb 27

  12. Can MOPITT See The May 5th plume? MOPITT and GEOS-CHEM CO columns GEOS-CHEM xAVG KERNAL GEOS-CHEM (12 UTC) MOPITT April 30 May 4 May 5 May 6

  13. Heald et al. 2003 Trans-Pacific Transport during TRACE-P: MOPITT and GEOS-CHEM time series MOPITT: solid Model: dotted 4 trans-Pacific events reached North America during TRACE-P

  14. Trans-Pacific Transport during ITCT-2K2: MOPITT and GEOS-CHEM time series

  15. Preliminary Conclusions & Future Work • Preliminary Conclusions: - The May 5 transpacific plume included both Asian fuel and biomass burning components lifted in WCB outflow -Ozone was enhanced in both components of the plume, more so in the biomass burning component; this enhancement is not obvious in observations because of high background. It reflects production over Asian continent or immediately downwind. Elevated PAN/NOy in May 5 observations are consistent with this view - MOPITT observations during ITCT-2K2 show several events of transpacific transport, including the May 5 plume • Future Work: - Develop biomass burning inventory for the ITCT-2K2 period using a combination of VIRS and other products? - Further interface of PEACE-B and ITCT-2K2 - Further interpretation of MOPITT data

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