Allen Chu & MODIS Aerosol Team MODIS Atmosphere Retreat Meeting St. Michaels, Maryland March 17,...

Allen Chu&

MODIS Aerosol Team

MODIS Atmosphere Retreat MeetingSt. 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, 10,325-33

Seoul

100

20

30

40%

200

40

60

%

Gobi DesertDun-Huang

abc

cba

1

1

2

3

3

2

1 2

3

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

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

“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

Arizona Grand 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

4/14/01NASA/GSFC

Dust Layer

4/9/01Sea of Japan

Trails of “perfect dust storm” captured by Micropulse Lidar

Dust/Pollution/Biomass burning in East Asia

spring summer

autumn winter

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

L L

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

PM25 24 hr. average

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

PM25 24 hr. average