# Presentation: 095287

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

- B. Schmid     	BAER/NASA Ames Research Center,           Moffett Field, CA, USAP. B. Russell	            NASA Ames Research Center      P. Pilewskie	            NASA Ames Research Center J. Redemann 	BAER/NASA Ames Research Center J. M. Livingston 	            SRI International,                                Menlo Park, CA, USA P. V. Hobbs	            University of Washington,                  Seattle, WA, USAE. J. Welton 	 GEST/NASA Goddard Space Flight Center, Greenbelt, MD, USAJ. Campbell 	  SSAI/NASA Goddard Space Flight Center B. N. Holben	            NASA Goddard Space Flight Center M. McGill 	            NASA Goddard Space Flight Center Also Appearing:A. Chu 		            NASA Goddard Space Flight Center L. A. Remer 	            NASA Goddard Space Flight Center O. Torres       JCET-UMBC/NASA Goddard Space Flight Center D. L. Hlavka 	  SSAI/NASA Goddard Space Flight Center

## SAFARI 2000 dry-season airborne campaign Aug 13-Sep 25, 2000
9 Southern African nations
6 research aircraft
Satellite overpasses
Ground-based measurement teams
Here we discuss:
coordinated observations of the evolution of massive, thick haze layers produced by biomass burning, industrial emissions, marine and biogenic sources. 

- 9 Southern African nations
- 6 research aircraft
- Satellite overpasses
- Ground-based measurement teams
- Here we discuss:
- coordinated observations of the evolution of massive, thick _haze_ layers produced by biomass burning, industrial emissions, marine and biogenic sources.

- The Southern African Regional Science Initiative - SAFARI 2000 - is an international science initiative aimed at developing a better understanding of the southern African earth-atmosphere-human system.

- Ozone Column, Absorbing Aerosol Index,
- Aerosol Optical Depth (380 nm), Single Scatter Albedo (380 nm)

- MODIS                                               Moderate-resolution Imaging Spectroradiometer

-  over water (AOD at 6 wavelengths +1 extrapolated, some size characteristics)
-  over land (AOD at 2 wavelengths + 1 interpolated)

- Aerosol Optical Depth over water and land (0.557 m), aerosol type

- Aerosol retrieval from satellites in SAFARI-2000

##  Aerosol extinction profiles

-  Aerosol extinction profiles
- 532 and 1064 nm

**UNIVERSITY OF WASHINGTON CV-580**

- 31 Flights (120 hours) during SAFARI-2000

- 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

## Slide 6

## Compare AATS-14 with Cimel during low level run near Mongu

- Vertical profile AATS-14 near Mongu

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## Vertical profile AATS-14 near Maun under TOMS

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## Aerosol height=5.185 km

- SSA=0.956

## Comparison AATS-14 with Cimel and MODIS on Terra

- Flux from SSFR

## Slide 16

## Spectral Solar Flux Radiometer (SSFR)

- on CV-580 over Inhaca Island, Aug 24, 2000

- Flux Divergence (=Absorption)

- Net Flux (down-up)

- Layer Depth 2.7 km
- Layer AOD at 500 nm=0.24 (from AATS-14)

## AATS-14 Aerosol and H2O profile

- AATS-14 Aerosol and H2O profile
- Comparison with Cimel
- Comparison with MPL
- Comparison with CPL on ER-2

## 25 km

## Skukuza 8/22/2000, Aeronet Cimel (Level 1.5 Data)

- 380 nm

- 440 nm

- 500 nm

- 670 nm

- 870 nm

- 1020 nm

- start descent

- end descent

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## Conclusions/Outlook

| Instruments |  | # cases done | Comment | # cases to do |
| --- | --- | --- | --- | --- |
| AATS-14 | Aeronet | 3 | Good agreement | ~17 |
| AATS-14 | MPL-Net | 1 | Good agreement | 4 |
| AATS-14 | CV-580 in-situ aerosol data | 0 | Closure analysis | <24 |
| AATS-14 | CV-580 SSFR | 2 | Aerosol Absorption, Radiative Forcing | ? |
| AATS-14 | ER-2 MAS | 0 |  | 7 |
| AATS-14 | ER-2 AirMISR | 0 |  | 7 |
| AATS-14 | ER-2 CPL | 1 | Good agreement | 6 |
| AATS-14 | MISR | 0 |  | 12 |
| AATS-14 | MODIS | 3 | Good agreement over water | 9 |
| AATS-14 | TOMS | 1 | Reasonable agreement | 0 |