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AERONET - Aerosols
AEROSOL OPTICAL DEPTH AEROSOL INVERSIONS SOLAR FLUX OCEAN COLOR Maritime Aerosol Network
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AEROSOL OPTICAL DEPTH - Direct Sun Measurements
 
 

Sun photometer measurements of the direct (collimated) solar radiation provide information to calculate the columnar aerosol optical depth (AOD). AOD can be used to compute columnar water vapor (Precipitable Water) and estimate the aerosol size using the Angstrom parameter relationship. Version 3 algorithm processing includes three quality levels (Levels 1.0, 1.5, 2.0) for each product. While Levels 1.0 and 1.5 are provided in near real-time, the 12-month or longer delay (due to the requirement of post-field final calibration) ensures that the highest quality data can be found in Version 3, Level 2.0 data products. Version 3 AOD processing also provides fine and coarse mode AOD as well as fine mode fraction.

For detailed information on Version 3 AOD processing, please see Giles et al., 2019 below.

Giles, D. M., Sinyuk, A., Sorokin, M. G., Schafer, J. S., Smirnov, A., Slutsker, I., Eck, T. F., Holben, B. N., Lewis, J. R., Campbell, J. R., Welton, E. J., Korkin, S. V., and Lyapustin, A. I. (2019): Advancements in the Aerosol Robotic Network (AERONET) Version 3 database – automated near-real-time quality control algorithm with improved cloud screening for Sun photometer aerosol optical depth (AOD) measurements, Atmos. Meas. Tech., 12, 169-209, https://doi.org/10.5194/amt-12-169-2019.

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Version 3 Data Display
 
 

Level 2.0 Data Display
Version 3, Level 2 Global AERONET Site Distribution

Access Data Displays

+ Level 1.0 - unscreened data but may not have final calibration applied
+ Level 1.5 -
cloud-screened data but may not have final calibration applied. These data are not quality assured.
+ Level 2.0
- pre- and post-field calibration applied, cloud-screened, and quality-assured data

 

Data Download
 
 

+ Version 3 Download Tool - AOD, Precipitable Water, Angstrom Parameter, Total Optical Depth, Fine and Coarse Mode AOD and Fine Mode Fraction (specify site and time range for all levels)

+ Version 3 Download Level 2.0 Data Files - (all sites and times in one compressed file, Levels 1.5 and 2.0)

+ Version 3 AOD Climatology Tables

 

Prior Versions:

+ Version 2 Download Tool - AOD, Precipitable Water, Angstrom Parameter, Total Optical Depth, Fine and Coarse Mode AOD and Fine Mode Fraction (specify site and time range for all levels)

+ Download Level 2.0 Data Files - (all sites and times in one compressed file for Version 2, Level 2.0)

+ Version 1 Download Tool - AOD, Precipitable Water, Angstrom Parameter, Almcuantar retrievals (specify site and time range for all levels)

 
 
  + Privacy Policy and Important Notices NASA Curator: David M. Giles
NASA Official: Brent N. Holben
Last Updated: February 01, 2019