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

Allen Chu/NASA GSFC Courtesy: NSF

March 24- May 10, 2001 ACE-Asia Taklimakan Desert Tibetan Plateau Himalaya EOS/MODLAND Product Beijing Sun et al. 2001, JGR, 10, Seoul % % Gobi Desert Dun-Huang a b c c b a

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

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

“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 million tons of sand are being removed every year. Courtesy: Dr. Zev Levin

ArizonaGrand Canyon

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

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

Dust/Pollution/Biomass burning in East Asia springsummer autumnwinter

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

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

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

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

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)     

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)    

MODIS Validation in ACE-Asia

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

AOD & fine-mode fraction

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)

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

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