1. Allen Chu & MODIS Aerosol Team MODIS Atmosphere Retreat Meeting St. Michaels, Maryland March 17, 2003 Evaluation of MODIS Aerosol Products in ACE-Asia

2. Allen Chu/NASA GSFC Courtesy: NSF

3. March 24- May 10, 2001 ACE-Asia Taklimakan Desert Tibetan Plateau Himalaya EOS/MODLAND Product Beijing Sun et al. 2001, JGR, 10,325-33 Seoul 10 0 20 30 40 % 20 0 40 60 % Gobi Desert Dun-Huang a b c c b a 1 1 2 3 3 2

4. 12 3 The birth of “perfect dust storm” captured by GMS-5 geosatationary satellite

5. “The Perfect Dust Storm” captured by MODIS on April 7, 2001

6. “Perfect dust storm” After Approaching A few centimeter accumulation of dust on the surface is very common in areas under storm paths. It is estimated that 200-300 million tons of sand are being removed every year. Courtesy: Dr. Zev Levin

7. ArizonaGrand Canyon

8. April 14, 2001 California Coast Dusty weather from perfect dust storm Arriving at California /Moving out of US April 22, 2001 New Jersey/New York Coast

9. Dust Layer 4/14/01 NASA/GSFC Dust Layer 4/9/01 Sea of Japan Trails of “perfect dust storm” captured by Micropulse Lidar

10. Dust/Pollution/Biomass burning in East Asia springsummer autumnwinter

11. Jan. Feb. Mar. Apr. May June July Aug. Sep. Oct. Nov. Dec.

12. Comparison between MODIS and AERONET derived AOD in Korea - ACE-Asia

13. Comparison between MODIS and AERONET derived AOD in Japan - ACE-Asia

14. Flight paths of C-130 and Twin Otter in ACE-Asia

15. MODIS Validation with AATS onboard C-130 and Twin-Otter in ACE-Asia : MODIS : AATS LL L  °  °  °  °  °  °  °  ° (2.5,7.5) (1,8)(1.5,6)(2,8) (3,9) (1,9) (3,9) (3.3,8)     

16. MODIS Validation with Sunphotometer/shadowband radiometer onboard RV Ron Brown in ACE-Asia  °  °  °  °  °  °  °  °  ° (2,7.5)(3.5,8)(2,6) (2.3,8.6)(2.6,8.6) (3,9) (1,9)(1.2,8.2) (2,8)    

17. MODIS Validation in ACE-Asia

18. April 13, 2001 Dust and Biomass Burning Aerosols Dust Biomass Burnning Dust Biomass Burnning MODIS True Color MODIS Aerosol Optical Depth TOMS Aerosol Index

19. AOD & fine-mode fraction

20. Correlations by US EPA Region for June PM event (Region 5-IL, IN, MI, MN, OH, WI & Region 3-DC, DE, MD, PA, VA, WV)

21. Initial Time Series Analysis of Hourly PM2.5 Concentrations and Coincident MODIS pixel PM 25 24 hr. average

22. Initial Time Series Analysis of Hourly PM2.5 Concentrations and Coincident MODIS pixel PM 25 24 hr. average