| Accuracy verification of MODIS daily cloud-free snow cover products over the Tibetan Plateau北大核心CSCD |
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| 引用本文： | 李诺,韩其飞,马英,黄晓东. Accuracy verification of MODIS daily cloud-free snow cover products over the Tibetan Plateau北大核心CSCD[J]. 冰川冻土, 2022, 44(6): 1740-1747. DOI: 10.7522/j.issn.1000-0240.2022.0152 |
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| 作者姓名： | 李诺 韩其飞 马英 黄晓东 |
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| 作者单位： | 1.南京信息工程大学 地理科学学院，江苏 南京 210041;2.兰州大学 草地农业生态系统国家重点实验室 草地农业科技学院，甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目(41971293) |
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| 摘 要： | Snow cover is of great hydrological，ecological，and climatic significance in the Tibetan Plateau. MODIS snow products are widely used at present but are seriously affected by clouds. Scholars at home and abroad have developed a variety of cloud removal products for raw MODIS daily snow products，but the accuracy of these products in the Tibetan Plateau has not been evaluated comprehensively. Therefore，this paper uses Landsat-8 data with high resolution as the reference value to conduct systematic verification of three datasets of cloud-free snow products released on a daily basis. The results show that compared with the two sets of products （M*D10A1GL06 and MODIS_Dysno_Cloudfree），which are produced based on raw MODIS daily snow cover product realized by NSIDC（National Snow and Ice Data Center），the MODIS CGF SCE product produced based on MODIS surface reflectance data，has a great advantage in snow identification accuracy. The MODIS CGF SCE product optimized the NDSI threshold for different land cover types. Although the accuracy of snow identification was significantly improved，the problem of large snow identification error in forest areas was still not effectively resolved，and there was a high underestimate error. © 2022 Science Press (China).
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| 关 键 词： | MODIS 积雪产品 精度评价 青藏高原 |
| 收稿时间： | 2022-06-24 |
| 修稿时间： | 2022-07-24 |
Accuracy verification of MODIS daily cloud-free snow cover products over the Tibetan Plateau |
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| Nuo LI,Qifei HAN,Ying MA,Xiaodong HUANG. Accuracy verification of MODIS daily cloud-free snow cover products over the Tibetan Plateau[J]. Journal of Glaciology and Geocryology, 2022, 44(6): 1740-1747. DOI: 10.7522/j.issn.1000-0240.2022.0152 |
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| Authors: | Nuo LI Qifei HAN Ying MA Xiaodong HUANG |
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| Affiliation: | 1.School of Geographical Sciences，Nanjing University of Information Science and Technology，Nanjing 210044，China;2.State Key Laboratory of Grassland Agro-ecosystems，College of Pastoral Agriculture Science and Technology，Lanzhou University，Lanzhou 730000，China |
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| Abstract: | Snow cover is of great hydrological， ecological， and climatic significance in the Tibetan Plateau. MODIS snow products are widely used at present but are seriously affected by clouds. Scholars at home and abroad have developed a variety of cloud removal products for raw MODIS daily snow products， but the accuracy of these products in the Tibetan Plateau has not been evaluated comprehensively. Therefore， this paper uses Landsat-8 data with high resolution as the reference value to conduct systematic verification of three datasets of cloud-free snow products released on a daily basis. The results show that compared with the two sets of products （M*D10A1GL06 and MODIS_Dysno_Cloudfree）， which are produced based on raw MODIS daily snow cover product realized by NSIDC （National Snow and Ice Data Center）， the MODIS CGF SCE product produced based on MODIS surface reflectance data， has a great advantage in snow identification accuracy. The MODIS CGF SCE product optimized the NDSI threshold for different land cover types. Although the accuracy of snow identification was significantly improved， the problem of large snow identification error in forest areas was still not effectively resolved， and there was a high underestimate error. |
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| Keywords: | MODIS snow cover product accuracy verification Tibetan Plateau |
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