Collection 005 Change Summary for MODIS Aerosol (04_L2) Algorithms

1. Land: New inversion algorithm implemented. 2. Land: Valid range of AOD extended to -0.1 3. Land: Aerosol models now based on Dubovik (2002) and new geographic distribution 4. Land: Surface reflectance relationships a function of vegetation index and scattering angle. 5. Land: Subpixel snow mask implemented 6. Land: Cloud mask adjusted and QA flag set to 0 in some situations. 7. Land: Mass concentration now multiplied by exp(4.5σ) 8. Ocean: Real and imaginary refractive indices changed for 3 of the 5 coarse modes in the Look Up Table 9. Ocean: CCN units corrected. 10. Ocean: Mass concentration now multiplied by 4*pi/3 11. Land and Ocean: Original SDS now contains only land products with QA = 3. New “Image” SDS introduced to display all data of all levels of QA 12. Land and Ocean: Cloud fraction redefined. 13. Land and Ocean: Negative reflectances in 1.38 μm channel permitted. 14. Land and Ocean: New SDS introduced to hold diagnostic information on the cloud mask. 15. Land and Ocean: Removal of unnecessary SDSs and general clean up of code. 16. References