Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products
The Moderate Resolution Imaging Spectroradiometer (MODIS) is widely utilized for retrieving land surface reflectance to reflect plant conditions, detect ecosystem phenology, monitor forest fires, and constrain terrestrial energy budgets. However, the state-of-the-art MODIS surface reflectance produc...
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ftcopernicus:oai:publications.copernicus.org:essd113699 2024-09-15T18:31:18+00:00 Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products Liang, Xiangan Liu, Qiang Wang, Jie Chen, Shuang Gong, Peng 2024-01-10 application/pdf https://doi.org/10.5194/essd-16-177-2024 https://essd.copernicus.org/articles/16/177/2024/ eng eng doi:10.5194/essd-16-177-2024 https://essd.copernicus.org/articles/16/177/2024/ eISSN: 1866-3516 Text 2024 ftcopernicus https://doi.org/10.5194/essd-16-177-2024 2024-08-28T05:24:15Z The Moderate Resolution Imaging Spectroradiometer (MODIS) is widely utilized for retrieving land surface reflectance to reflect plant conditions, detect ecosystem phenology, monitor forest fires, and constrain terrestrial energy budgets. However, the state-of-the-art MODIS surface reflectance products suffer from temporal and spatial gaps due to atmospheric conditions (e.g. clouds and aerosols), limiting their use in ecological, agricultural, and environmental studies. Therefore, there is a need for reconstructing spatiotemporally seamless (i.e. gap-filled) surface reflectance data from MODIS products, which is difficult due to the intrinsic inconsistency of observations resulting from various sun/view geometry and the prolonged missing values resulting from polar night or heavy cloud coverage, especially in monsoon season. We built a framework for generating the global 500 m daily seamless data cubes (SDC500) based on MODIS surface reflectance dataset, which contains the generation of a land-cover-based a priori database, bidirectional reflectance distribution function (BRDF) correction, outlier detection, gap filling, and smoothing. The first global spatiotemporally seamless land surface reflectance at 500 m resolution was produced, covering the period from 2000 to 2022. Preliminary evaluation of the dataset at 12 sites worldwide with different land cover demonstrated its robust performance. The quantitative assessment shows that the SDC500 gap-filling results have a root-mean-square error (RMSE) of 0.0496 and a mean absolute error (MAE) of 0.0430. The SDC500 BRDF correction results showed an RMSE of 0.056 and a bias of − 0.0085 when compared with MODIS nadir BRDF-adjusted reflectance (NBAR) products, indicating the acceptable accuracy of both products. From a temporal perspective, the SDC500 eliminates abnormal fluctuations while retaining the useful localized feature of rapid disturbances. From a spatial perspective, the SDC500 shows satisfactory spatial continuity. In conclusion, the SDC500 is a ... Text polar night Copernicus Publications: E-Journals Earth System Science Data 16 1 177 200 |
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English |
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The Moderate Resolution Imaging Spectroradiometer (MODIS) is widely utilized for retrieving land surface reflectance to reflect plant conditions, detect ecosystem phenology, monitor forest fires, and constrain terrestrial energy budgets. However, the state-of-the-art MODIS surface reflectance products suffer from temporal and spatial gaps due to atmospheric conditions (e.g. clouds and aerosols), limiting their use in ecological, agricultural, and environmental studies. Therefore, there is a need for reconstructing spatiotemporally seamless (i.e. gap-filled) surface reflectance data from MODIS products, which is difficult due to the intrinsic inconsistency of observations resulting from various sun/view geometry and the prolonged missing values resulting from polar night or heavy cloud coverage, especially in monsoon season. We built a framework for generating the global 500 m daily seamless data cubes (SDC500) based on MODIS surface reflectance dataset, which contains the generation of a land-cover-based a priori database, bidirectional reflectance distribution function (BRDF) correction, outlier detection, gap filling, and smoothing. The first global spatiotemporally seamless land surface reflectance at 500 m resolution was produced, covering the period from 2000 to 2022. Preliminary evaluation of the dataset at 12 sites worldwide with different land cover demonstrated its robust performance. The quantitative assessment shows that the SDC500 gap-filling results have a root-mean-square error (RMSE) of 0.0496 and a mean absolute error (MAE) of 0.0430. The SDC500 BRDF correction results showed an RMSE of 0.056 and a bias of − 0.0085 when compared with MODIS nadir BRDF-adjusted reflectance (NBAR) products, indicating the acceptable accuracy of both products. From a temporal perspective, the SDC500 eliminates abnormal fluctuations while retaining the useful localized feature of rapid disturbances. From a spatial perspective, the SDC500 shows satisfactory spatial continuity. In conclusion, the SDC500 is a ... |
format |
Text |
author |
Liang, Xiangan Liu, Qiang Wang, Jie Chen, Shuang Gong, Peng |
spellingShingle |
Liang, Xiangan Liu, Qiang Wang, Jie Chen, Shuang Gong, Peng Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
author_facet |
Liang, Xiangan Liu, Qiang Wang, Jie Chen, Shuang Gong, Peng |
author_sort |
Liang, Xiangan |
title |
Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
title_short |
Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
title_full |
Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
title_fullStr |
Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
title_full_unstemmed |
Global 500 m seamless dataset (2000–2022) of land surface reflectance generated from MODIS products |
title_sort |
global 500 m seamless dataset (2000–2022) of land surface reflectance generated from modis products |
publishDate |
2024 |
url |
https://doi.org/10.5194/essd-16-177-2024 https://essd.copernicus.org/articles/16/177/2024/ |
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polar night |
genre_facet |
polar night |
op_source |
eISSN: 1866-3516 |
op_relation |
doi:10.5194/essd-16-177-2024 https://essd.copernicus.org/articles/16/177/2024/ |
op_doi |
https://doi.org/10.5194/essd-16-177-2024 |
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Earth System Science Data |
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177 |
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200 |
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