Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis
The Moderate Resolution Imaging Spectroradiometer (MODIS) provides widespread Aerosol Optical Depth (AOD) datasets for climatological and environmental health research. Since MODIS AOD clearly lacks coverage in orbit-scanning gaps and cloud obscuration, some applications will benefit from data recov...
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ftmdpi:oai:mdpi.com:/2072-4292/9/4/340/ 2023-08-20T03:59:11+02:00 Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis Tianhao Zhang Chao Zeng Wei Gong Lunche Wang Kun Sun Huanfeng Shen Zhongmin Zhu Zerun Zhu agris 2017-04-02 application/pdf https://doi.org/10.3390/rs9040340 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs9040340 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 9; Issue 4; Pages: 340 MODIS aerosol optical depth multi-temporal relationship NDVI-based Weighted Linear Regression (NWLR) Text 2017 ftmdpi https://doi.org/10.3390/rs9040340 2023-07-31T21:05:15Z The Moderate Resolution Imaging Spectroradiometer (MODIS) provides widespread Aerosol Optical Depth (AOD) datasets for climatological and environmental health research. Since MODIS AOD clearly lacks coverage in orbit-scanning gaps and cloud obscuration, some applications will benefit from data recovery using multi-temporal AOD. Aimed at qualitatively describing the relationship between multi-temporal AOD, AOD loadings and Normalized Difference Vegetation Index (NDVI) have been considered based on the mechanism of satellite AOD retrieval. Accordingly, the NDVI-based Weighted Linear Regression (NWLR) has been proposed to recover AOD by synthetically weighing AOD similarity, spatial proximity, and NDVI similarity. To evaluate the performance of AOD recovery, simulated experiments applying gap and window masks were conducted in South Asia and Beijing, respectively. The evaluation results demonstrated that the linear regression R2 achieved 0.8 and the absolute relative errors remained steady. Further validation was conducted between the recovered and actual AODs using 56 Aerosol Robotic Network (AERONET) sites in East and South Asia from 2013 to 2015, which demonstrated that over 41% of recovered AODs fell within the expected error (EE) envelope. Additional validation conducted in South Asia and Beijing showed that recovery by NWLR did not expand satellite-derived AOD errors, and the accuracy of recovered AOD was consistent with the accuracy of the original Aqua MODIS Deep Blue (DB) AOD. The recovery results illustrated that AOD coverage was improved in most regions, especially in North China, Mongolia, and South Asia, which could provide better support in aerosol spatio-temporal analysis and aerosol data assimilation. Text Aerosol Robotic Network MDPI Open Access Publishing Remote Sensing 9 4 340 |
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Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
MODIS aerosol optical depth multi-temporal relationship NDVI-based Weighted Linear Regression (NWLR) |
spellingShingle |
MODIS aerosol optical depth multi-temporal relationship NDVI-based Weighted Linear Regression (NWLR) Tianhao Zhang Chao Zeng Wei Gong Lunche Wang Kun Sun Huanfeng Shen Zhongmin Zhu Zerun Zhu Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
topic_facet |
MODIS aerosol optical depth multi-temporal relationship NDVI-based Weighted Linear Regression (NWLR) |
description |
The Moderate Resolution Imaging Spectroradiometer (MODIS) provides widespread Aerosol Optical Depth (AOD) datasets for climatological and environmental health research. Since MODIS AOD clearly lacks coverage in orbit-scanning gaps and cloud obscuration, some applications will benefit from data recovery using multi-temporal AOD. Aimed at qualitatively describing the relationship between multi-temporal AOD, AOD loadings and Normalized Difference Vegetation Index (NDVI) have been considered based on the mechanism of satellite AOD retrieval. Accordingly, the NDVI-based Weighted Linear Regression (NWLR) has been proposed to recover AOD by synthetically weighing AOD similarity, spatial proximity, and NDVI similarity. To evaluate the performance of AOD recovery, simulated experiments applying gap and window masks were conducted in South Asia and Beijing, respectively. The evaluation results demonstrated that the linear regression R2 achieved 0.8 and the absolute relative errors remained steady. Further validation was conducted between the recovered and actual AODs using 56 Aerosol Robotic Network (AERONET) sites in East and South Asia from 2013 to 2015, which demonstrated that over 41% of recovered AODs fell within the expected error (EE) envelope. Additional validation conducted in South Asia and Beijing showed that recovery by NWLR did not expand satellite-derived AOD errors, and the accuracy of recovered AOD was consistent with the accuracy of the original Aqua MODIS Deep Blue (DB) AOD. The recovery results illustrated that AOD coverage was improved in most regions, especially in North China, Mongolia, and South Asia, which could provide better support in aerosol spatio-temporal analysis and aerosol data assimilation. |
format |
Text |
author |
Tianhao Zhang Chao Zeng Wei Gong Lunche Wang Kun Sun Huanfeng Shen Zhongmin Zhu Zerun Zhu |
author_facet |
Tianhao Zhang Chao Zeng Wei Gong Lunche Wang Kun Sun Huanfeng Shen Zhongmin Zhu Zerun Zhu |
author_sort |
Tianhao Zhang |
title |
Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
title_short |
Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
title_full |
Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
title_fullStr |
Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
title_full_unstemmed |
Improving Spatial Coverage for Aqua MODIS AOD using NDVI-Based Multi-Temporal Regression Analysis |
title_sort |
improving spatial coverage for aqua modis aod using ndvi-based multi-temporal regression analysis |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2017 |
url |
https://doi.org/10.3390/rs9040340 |
op_coverage |
agris |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing; Volume 9; Issue 4; Pages: 340 |
op_relation |
https://dx.doi.org/10.3390/rs9040340 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs9040340 |
container_title |
Remote Sensing |
container_volume |
9 |
container_issue |
4 |
container_start_page |
340 |
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1774719671776313344 |