Validation of MODIS C6 Dark Target Aerosol Products at 3 km and 10 km Spatial Resolutions Over the China Seas and the Eastern Indian Ocean
Abstract
:1. Introduction
2. Study Area and Data Set
2.1. Study Area
2.2. MAN AOD
2.3. MODIS Dataset
3. Methods
4. Results and Discussions
4.1. Validation of MODIS DT Ocean Algorithm
4.1.1. Validation of DT AOD at 10 km Resolution
4.1.2. Validation of DT AOD at 3 km Resolution
4.2. Comparison between DT10K and DT3K
4.3. Error Analysis
5. Conclusions
- the DT3K coincident AOD observations were less than the DT10K,
- a large number of incident observations were available within ±12 h, small RMSE was observed within ±2 h, and a large percentage of the retrievals within the EE was observed within ±4 h,
- both the DT3K and DT10K extremely underestimates over water surfaces, and large underestimation being observed during autumn by summer,
- the algorithm performed well during summer, but it has fewer numbers of coincident observations for the both DT3K and DT10K,
- ODLAOAOD observations from the DT3K and DT10K were found better and suitable for use over the China seas and the eastern Indian Ocean compared to the EODAOAOD, EODBOAOD, and IODLAOAOD in terms of high correlation with the MAN AOD data and large percentage within the EE,
- ODLAOAOD observations were less sensitive to the variations in normalized water reflectance, and
- overall, this study found that the DT10K and DT3K AOD retrievals do not meet the requirements of the EE as the percentage within the EE was less than 68%.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Cruise | N | Latitude | Longitude | Year | ||
---|---|---|---|---|---|---|
Min | Max | Min | Max | |||
Eardo_13 | 6 | 33.004 | 34.321 | 126.479 | 126.759 | September 2013–October 2013 |
Marion_Dufresne_10_2 | 57 | 8.943 | 43.195 | 111.502 | 141.015 | May 2010–June 2010 |
RV_1_2010 | 19 | 18 | 22.404 | 115.657 | 120.057 | March 2010 |
Shiyan_11_0 | 104 | −5.08 | 22.138 | 79.811 | 113.788 | April 2011–May 2011 |
Shiyan_12_0 | 297 | −5.002 | 19.756 | 79.839 | 113.513 | February2012–April 2012 |
Shiyan_12_1 | 263 | 13.963 | 21.827 | 110.249 | 118.986 | October 2012 |
Shiyan_13_0 | 314 | 1.533 | 21.837 | 83.804 | 113.86 | April 2013–May 2013 |
Shiyan_13_1 | 132 | 14.849 | 22.665 | 110.908 | 120.006 | September 2013–October2013 |
Shiyan_14_0 | 254 | −6.203 | 19.975 | 101.307 | 113.127 | March 2014–April2014 |
Shiyan_14_1 | 235 | 5.827 | 19.067 | 84.591 | 110.957 | May 2014 |
Vasco_11 | 180 | 11.75 | 14.5 | 120.217 | 120.8 | September 2011 |
Vasco_12 | 55 | 7.85 | 12.683 | 116.933 | 120.467 | September 2012 |
Zim_San_Diego_10 | 145 | 1.675 | 51.161 | −173.342 | 164.766 | July 2012–August 2010 |
Data | Scientific Data Set (SDS) Name | Contents |
---|---|---|
MYD04 | Effective_Optical_Depth_Average_Ocean | DT3K and DT10K over the ocean |
Effective_Optical_Depth_Best_Ocean | ||
Image_Optical_Depth_Land_And_Ocean | ||
Optical_Depth_Land_And_Ocean | ||
MODIS A | Remote Sensing Reflectance | Daily Rrs at 4 km |
MAN | Level 1.5 | AOD |
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Shen, X.; Bilal, M.; Qiu, Z.; Sun, D.; Wang, S.; Zhu, W. Validation of MODIS C6 Dark Target Aerosol Products at 3 km and 10 km Spatial Resolutions Over the China Seas and the Eastern Indian Ocean. Remote Sens. 2018, 10, 573. https://doi.org/10.3390/rs10040573
Shen X, Bilal M, Qiu Z, Sun D, Wang S, Zhu W. Validation of MODIS C6 Dark Target Aerosol Products at 3 km and 10 km Spatial Resolutions Over the China Seas and the Eastern Indian Ocean. Remote Sensing. 2018; 10(4):573. https://doi.org/10.3390/rs10040573
Chicago/Turabian StyleShen, Xiaojing, Muhammad Bilal, Zhongfeng Qiu, Deyong Sun, Shengqiang Wang, and Weijun Zhu. 2018. "Validation of MODIS C6 Dark Target Aerosol Products at 3 km and 10 km Spatial Resolutions Over the China Seas and the Eastern Indian Ocean" Remote Sensing 10, no. 4: 573. https://doi.org/10.3390/rs10040573