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1 Y. Kaufman, L. Remer, M. Chin, NASA; Didier Tanré, CNRS, Univ. of Lille Aerosol measurements & models MODIS & AERONET vs. GOCART.

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Presentation on theme: "1 Y. Kaufman, L. Remer, M. Chin, NASA; Didier Tanré, CNRS, Univ. of Lille Aerosol measurements & models MODIS & AERONET vs. GOCART."— Presentation transcript:

1 1 Y. Kaufman, L. Remer, M. Chin, NASA; Didier Tanré, CNRS, Univ. of Lille Aerosol measurements & models MODIS & AERONET vs. GOCART

2 2 Products: MODIS - ocean: Aerosol optical thickness fraction in fine mode Effective radius spectral flux at TOA MODIS - land:Aerosol optical thickness ~ fraction in fine mode AERONET: Aerosol optical thickness fraction in fine mode size distribution absorption/scattering

3 3 Land: N=1192 76% of retrievals within expected error Ocean: N=371 68% of retrievals within expected error Validation of Aerosol Optical Thickness Rob Levy & Lorraine Remer MODIS vs. AERONET (Aug 2000 to Nov. 2001)

4 4 SpringSummer AutumnWinter 010020406080 % Frequency of aerosol retrievals in a 1°  1° grid box - spring (March - May 2001), summer (June - August 2001), autumn (September - November 2001), and winter (December 2000 - January 2001). Allen Chu

5 5 Spring Mar ch - May 2001 Autumn September - November 2001 Summer Jun e - August 2001 Winter December 2000 - February 2001 00.80.20.40.6 aa Average optical thickness

6 6 Can we “fingerprint” the anthropogenic factor, and …. Estimate the aerosol forcing on climate to change ?

7 Fine aerosol 0.0 0.2 0.4 Coarse aerosol MODIS GOCART Model - M. Chin Fine anthropogenic Coarse aerosol Natural fine aerosol September 2000 - Kaufman, Tanré, Boucher, A new satellite view of aerosols in the climate system, review for Nature, Sept. 2002

8 Global results - September 2000 Modis monthly composite aerosol fine and coarse mode & aerosol forcing of climate Coarse mode aerosol Fine mode Aerosol optical thickness

9 9 Aerosol AERONET climatology (Dubovik et al.,JAS 2002) Aerosol radius fine coarse fine coarse

10 10 Aerosol transport: 2/16: Africa --> Europe; 4/16: China-->USA 5/5: Mexico, Arabian sea--->7/12: dust,smoke Africa; 8/26: smoke from South America and Africa

11 11

12 12 Sea Salt Saharan dust Smoke/Pollution? Dust and pollution

13 13 Pollution/dust in India Sea Salt Saharan dust Smoke Pollution?

14 14 Smoke pollution

15 15

16 16

17 17 Analysis:

18 18 Aug. 26 Ocean

19 19 Ocean Aug. 26

20 20 April 16 Ocean

21 21 Next? Observational based - MODIS & AERONET anthropogenic aerosol global forcing of climate - in cloud free conditions - Aerosol forcing using MODIS+CERES (U. Alabama) - Improve aerosol simulations - GOCART - Use in aerosol assimilation - NCAR - Use in climate models - GISS

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