Automated Aerosol Classification from Spectral UV Measurements Using Machine Learning Clustering
Abstract
:1. Introduction
2. Instrumentation and Products
2.1. The Cimel Sunphotometer
2.1.1. Fine Mode Fraction at 550 nm
2.1.2. Extinction Angstrom Exponent at 340–380 nm
2.2. The Double Monochromator Brewer Spectrophotometer
2.2.1. Spectral Aerosol Optical Depth and Single Scattering Albedo
2.2.2. Extinction and Absorption Angstrom Exponents
2.2.3. Evaluation of the Extinction Angstrom Exponent at 320–360 nm
2.3. The Reference Clusters
3. The Automated Classification Technique
4. Evaluation of the Proposed Technique
5. Climatological Comparison
6. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Abbreviations
AAE | Absorption Angstrom Exponent |
AOD | Aerosol Optical Depth |
AAOD | Absorption Aerosol Optical Depth |
BC | Black Carbon |
EAE | Extinction Angstrom Exponent |
FIRMS | Fire Information for Resource Management System |
FMF | Fine Mode Fraction |
FNA | Fine Non Absorbing |
FT-IR | Fourier-Transform Infrared Spectroscopy |
HYSPLIT | Hybrid Single Particle Lagrangian Integrated Trajectory Model |
LAP | Laboratory of Atmospheric Physics |
MODIS | Moderate Resolution Imaging Spectroradiometer |
MAX-DOAS | Multi Axis Differential Optical Absorption Spectroscopy |
SSA | Single Scattering Albedo |
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Product Name | Instrument | Algorithm | Restrictions |
---|---|---|---|
AOD340-380 | CIMEL | AERONET Ver. 3 Direct Sun | |
FMF500 | CIMEL | AERONET Ver. 3 Direct Sun | |
FMF550 | CIMEL | Interpolated from FMF440 | |
SSA440 | CIMEL | AERONET Ver. 3 Inversions | |
EAE340-380 | CIMEL | Angstrom formula | < 0.4 |
AOD320-360 | BREWER | LAP Operational Algorithm | SZA < 75, 0.2 < AOD340 < 1.5 |
SSA340 | BREWER | LAP Operational Algorithm | SZA < 75 |
EAE320-360 | BREWER | Logarithmic fit of AOD | < 0.4 |
Cluster Name | SSA340 | EAE320-340 | Number of Cases |
---|---|---|---|
FNA Mixtures | 0.87 | 1.3 | 564 |
BC Mixtures | 0.78 | 1.2 | 233 |
DUST Mixtures | 0.78 | 0.5 | 117 |
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Siomos, N.; Fountoulakis, I.; Natsis, A.; Drosoglou, T.; Bais, A. Automated Aerosol Classification from Spectral UV Measurements Using Machine Learning Clustering. Remote Sens. 2020, 12, 965. https://doi.org/10.3390/rs12060965
Siomos N, Fountoulakis I, Natsis A, Drosoglou T, Bais A. Automated Aerosol Classification from Spectral UV Measurements Using Machine Learning Clustering. Remote Sensing. 2020; 12(6):965. https://doi.org/10.3390/rs12060965
Chicago/Turabian StyleSiomos, Nikolaos, Ilias Fountoulakis, Athanasios Natsis, Theano Drosoglou, and Alkiviadis Bais. 2020. "Automated Aerosol Classification from Spectral UV Measurements Using Machine Learning Clustering" Remote Sensing 12, no. 6: 965. https://doi.org/10.3390/rs12060965