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Allen Chu&
MODIS Aerosol Team
MODIS Atmosphere Retreat MeetingSt. Michaels, Maryland
March 17, 2003
Evaluation of MODIS Aerosol Products in ACE-Asia
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Allen Chu/NASA GSFC
Courtesy: NSF
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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
100
20
30
40%
200
40
60
%
Gobi DesertDun-Huang
abc
cba
1
1
2
3
3
2
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1 2
3
The birth of “perfect dust storm” captured by GMS-5 geosatationary satellite
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“The Perfect Dust Storm” captured byMODIS on April 7, 2001
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“Perfect dust storm”
AfterApproaching
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
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Arizona Grand Canyon
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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
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Dust Layer
4/14/01NASA/GSFC
Dust Layer
4/9/01Sea of Japan
Trails of “perfect dust storm” captured by Micropulse Lidar
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Dust/Pollution/Biomass burning in East Asia
spring summer
autumn winter
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Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sep.
Oct.
Nov.
Dec.
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Comparison between MODIS and AERONET derived AOD in Korea - ACE-Asia
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Comparison between MODIS and AERONET derived AOD in Japan - ACE-Asia
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Flight paths of C-130 and Twin Otter in ACE-Asia
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MODIS Validation with AATS onboard C-130 and Twin-Otter in ACE-Asia
: MODIS
: AATS
L L
L
°
°°
°
° °
°
°
(2.5,7.5)
(1,8)(1.5,6)(2,8)
(3,9)(1,9)(3,9)
(3.3,8)
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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)
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MODIS Validation in ACE-Asia
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April 13, 2001
Dust and Biomass Burning Aerosols
Dust
Biomass Burnning
Dust
Biomass Burnning
MODIS True Color
MODIS Aerosol Optical Depth
TOMS Aerosol Index
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AOD & fine-mode fraction
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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)
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Initial Time Series Analysis of Hourly PM2.5 Concentrations and Coincident MODIS pixel
PM25 24 hr. average
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Initial Time Series Analysis of Hourly PM2.5 Concentrations and Coincident MODIS pixel
PM25 24 hr. average