Improved MODIS Dark Target aerosol optical depth algorithm over land: angular effect correction

Wu, Yerong; de Graaf, Martin; Menenti, Massimo

doi:https://doi.org/10.5194/amt-9-5575-2016

Articles | Volume 9, issue 11

https://doi.org/10.5194/amt-9-5575-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-9-5575-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 11

Research article

|

23 Nov 2016

Research article |

| 23 Nov 2016

Improved MODIS Dark Target aerosol optical depth algorithm over land: angular effect correction

Yerong Wu, Martin de Graaf, and Massimo Menenti

Data sets

Data of MOD04 L2, MCD43A1, MCD12C and ASRVN (Terra) LAADS https://ladsweb.nascom.nasa.gov/search

AERONET data NASA http://aeronet.gsfc.nasa.gov/cgi-bin/combined_data_access_inv

Short summary

In this paper, we developed a new algorithm to improve the retrieval of aerosol optical depth (AOD) over land with satellite measurement by refining the shape of the spectral surface reflectance to improve the estimated background reflectance in the channel used for AOD retrieval. The results show that the angular effects of the retrievals are largely reduced, including fewer occurrences of negative retrievals. This implies that the users can get more accurate data without angular bias.