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Airborne Sunphotometry and Closure Studies in the SAFARI-2000 Dry Season Campaign PowerPoint PPT Presentation


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Ozone Column, Absorbing Aerosol Index, Aerosol Optical Depth (380 nm), Single Scatter Albedo (380 nm). Instruments. # cases done. Comment. Total # of cases. 1. 0.9. AATS-14. Aeronet. 3. Good agreement. ~20. 0.8. AATS-14. MPL-Net. 1. Good agreement. 5. 0.7. 340 nm. AATS-14.

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Airborne Sunphotometry and Closure Studies in the SAFARI-2000 Dry Season Campaign

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Airborne sunphotometry and closure studies in the safari 2000 dry season campaign

Ozone Column, Absorbing Aerosol Index,

Aerosol Optical Depth (380 nm),

Single Scatter Albedo (380 nm)

Instruments

# cases done

Comment

Total # of cases

1

0.9

AATS-14

Aeronet

3

Good agreement

~20

0.8

AATS-14

MPL-Net

1

Good agreement

5

0.7

340 nm

AATS-14

CV-580 in-situ aerosol data

0

Closure analysis

<24

0.6

0.5

AATS-14

CV-580 SSFR

2

Aerosol Absorption, Radiative Forcing

?

0.4

AATS-14

ER-2 MAS

0

7

0.3

AATS-14

ER-2 AirMISR

0

7

0.2

AATS-14

ER-2 CPL

2

Good agreement

7

0.1

0

AATS-14

MISR

0

12

5:30

6:00

6:30

7:00

7:30

8:00

8:30

9:00

9:30

10:00

10:30

11:00

11:30

12:00

12:30

13:00

AATS-14

MODIS

3

Good agreement over water

12

UT

AATS-14

TOMS

1

Reasonable agreement

1

NASA Ames Airborne Tracking

14-Channel Sunphotometer (AATS-14)

  • Aerosol Optical Depth/Extinction

  • (354-1558 nm, 12 wavelengths)

  • Water Vapor Column/Density

  • 24 data flights on CV-580

NASA Ames

Spectral Solar Flux Radiometer (SSFR)

Aerosol retrieval from satellites in SAFARI-2000

  • Up and downwelling flux

  • 300-1700 nm, Resolution 8-12 nm, 1Hz

  • On CV-580, ER-2 and Skukuza

  • ground-site

  • Micro Pulse Lidar

  • 2 sites during SAFARI-2000

  • Aerosol Extinction Profiles 523 nm

MODIS Moderate-resolution Imaging Spectroradiometer

UNIVERSITY OF WASHINGTON CV-580

  • over water (AOD at 6 wavelengths +1 extrapolated, size characteristics)

  • over land (AOD at 2 wavelengths + 1 interpolated)

31 Flights (120 hours) during SAFARI-2000

  • Cimel Sun/sky radiometers

  • ~20 Southern African sites during SAFARI-2000

  • Aerosol Optical Depth at 7 wavelengths

  • Size Distributions

  • Single Scatter Albedo

August 24

September 6

  • Aerosol extinction profiles

  • 532 and 1064 nm

AOD over water and land (0.557 mm), aerosol type

August 22

September 2

SSA=0.956

Profile showing variation in AOD during level legs due to spatial inhomogeneity

Restricted profile using only measurements within 3.2 km of lidar site

Aerosol optical depth and derived extinction vertical profiles

Aerosol optical depth and derived extinction vertical profiles

Aerosol optical depth and derived extinction vertical profiles

start descent

end descent

380 nm

440 nm

AOD

500 nm

670 nm

870 nm

1020 nm

AOD time series measured by ground based Cimel sunphotometer during vertical profile

Columnar water vapor and derived water vapor density profiles

Columnar water vapor and derived water vapor density profiles

Columnar water vapor and derived water vapor density profiles

Columnar water vapor and derived water vapor density profiles

Comparison of aerosol extinction from airborne sunphotometer (AATS-14), airborne lidar (CPL) and ground-based lidar (MPL)

Comparison of AOD from airborne sunphotometer (AATS-14), airborne lidar (CPL) and ground-based lidar (MPL)

Comparison of AOD from airborne sunphotometer (AATS-14) and airborne lidar (CPL)

Comparison of aerosol extinction from airborne sunphotometer (AATS-14) and airborne lidar (CPL)

Comparisons done to date

Comparison of AOD spectra from ground-based (Cimel) and airborne sunphotometer (AATS-14) during low level run

Comparison of AOD spectra from ground-based sunphotometer (Cimel), airborne sunphotometer (AATS-14) and MODIS on the Terra satellite during low level run

Comparison of TOMS retrieved AOD with airborne sunphotometer (AATS-14) during low level run

Comparison of AOD spectra from ground-based (Cimel) and airborne sunphotometer (AATS-14) during low level run

Fractional absorption from flux divergence (Leg 2 - Leg 1)/ Leg 2

Fractional absorption from flux divergence (Leg 6 - Leg 1)/ Leg 6

Net flux (downwelling - upwelling) at 6 altitudes from SSFR

Net flux (downwelling - upwelling) at two altitudes from SSFR

Airborne Sunphotometry and Closure Studies in the SAFARI-2000 Dry Season Campaign

B. Schmid1, P.B. Russell2, P.Pilewskie2, J. Redemann1, P.V. Hobbs3, E.J. Welton4,

J. Campbell5, B.N. Holben6, D.L. Hlavka5, M. McGill6, A. Chu6, L.A. Remer6, O. Torres7, S. Ramirez8

1BAER/ NASA Ames, Moffett Field, CA, 2NASA Ames, Moffett Field, CA, 3University of Washington, Seattle, WA, 4GEST/ NASA Goddard, Greenbelt, MD,

5SSAI/ NASA Goddard, Greenbelt, MD, 6NASA Goddard, Greenbelt, MD, 7JCET-UMBC/ NASA Goddard, Greenbelt, MD, 8Symtech Corp./ NASA Ames, Moffett Field, CA

Address: BAER/ NASA Ames, MS 245-5, Moffett Field, CA 94035-1000

E-mail: [email protected]

Website: http://geo.arc.nasa.gov/sgg/SAFARI/


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