Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data
Snow density plays a critical role in estimating water resources and predicting natural disasters such as floods, avalanches, and snowstorms. However, gridded products for snow density are lacking for understanding its spatiotemporal patterns. In this study, considering the strong spatiotemporal het...
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/tc-17-33-2023 https://tc.copernicus.org/articles/17/33/2023/tc-17-33-2023.pdf https://doaj.org/article/9f3b105dd0b545ce8399a6e4657d28c6 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:9f3b105dd0b545ce8399a6e4657d28c6 2023-05-15T18:32:16+02:00 Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data H. Wang X. Zhang P. Xiao T. Che Z. Zheng L. Dai W. Luan 2023-01-01 https://doi.org/10.5194/tc-17-33-2023 https://tc.copernicus.org/articles/17/33/2023/tc-17-33-2023.pdf https://doaj.org/article/9f3b105dd0b545ce8399a6e4657d28c6 en eng Copernicus Publications doi:10.5194/tc-17-33-2023 1994-0416 1994-0424 https://tc.copernicus.org/articles/17/33/2023/tc-17-33-2023.pdf https://doaj.org/article/9f3b105dd0b545ce8399a6e4657d28c6 undefined The Cryosphere, Vol 17, Pp 33-50 (2023) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2023 fttriple https://doi.org/10.5194/tc-17-33-2023 2023-01-22T19:30:28Z Snow density plays a critical role in estimating water resources and predicting natural disasters such as floods, avalanches, and snowstorms. However, gridded products for snow density are lacking for understanding its spatiotemporal patterns. In this study, considering the strong spatiotemporal heterogeneity of snow density, as well as the weak and nonlinear relationship between snow density and the meteorological, topographic, vegetation, and snow variables, the geographically and temporally weighted neural network (GTWNN) model is constructed for estimating daily snow density in China from 2013 to 2020, with the support of satellite, ground, and reanalysis data. The leaf area index of high vegetation, total precipitation, snow depth, and topographic variables are found to be closely related to snow density among the 20 potentially influencing variables. The 10-fold cross-validation results show that the GTWNN model achieves an R2 of 0.531 and RMSE of 0.043 g cm−3, outperforming the geographically and temporally weighted regression model (R2=0.271), geographically weighted neural network model (R2=0.124), and reanalysis snow density product (R2=0.095), which demonstrates the superiority of the GTWNN model in capturing the spatiotemporal heterogeneity of snow density and the nonlinear relationship to the influencing variables. The performance of the GTWNN model is closely related to the state and amount of snow, in which more stable and plentiful snow would result in higher snow density estimation accuracy. With the benefit of the daily snow density map, we are able to obtain knowledge of the spatiotemporal pattern and heterogeneity of snow density in China. The proposed GTWNN model holds the potential for large-scale daily snow density mapping, which will be beneficial for snow parameter estimation and water resource management. Article in Journal/Newspaper The Cryosphere Unknown The Cryosphere 17 1 33 50 |
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geo envir H. Wang X. Zhang P. Xiao T. Che Z. Zheng L. Dai W. Luan Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
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geo envir |
description |
Snow density plays a critical role in estimating water resources and predicting natural disasters such as floods, avalanches, and snowstorms. However, gridded products for snow density are lacking for understanding its spatiotemporal patterns. In this study, considering the strong spatiotemporal heterogeneity of snow density, as well as the weak and nonlinear relationship between snow density and the meteorological, topographic, vegetation, and snow variables, the geographically and temporally weighted neural network (GTWNN) model is constructed for estimating daily snow density in China from 2013 to 2020, with the support of satellite, ground, and reanalysis data. The leaf area index of high vegetation, total precipitation, snow depth, and topographic variables are found to be closely related to snow density among the 20 potentially influencing variables. The 10-fold cross-validation results show that the GTWNN model achieves an R2 of 0.531 and RMSE of 0.043 g cm−3, outperforming the geographically and temporally weighted regression model (R2=0.271), geographically weighted neural network model (R2=0.124), and reanalysis snow density product (R2=0.095), which demonstrates the superiority of the GTWNN model in capturing the spatiotemporal heterogeneity of snow density and the nonlinear relationship to the influencing variables. The performance of the GTWNN model is closely related to the state and amount of snow, in which more stable and plentiful snow would result in higher snow density estimation accuracy. With the benefit of the daily snow density map, we are able to obtain knowledge of the spatiotemporal pattern and heterogeneity of snow density in China. The proposed GTWNN model holds the potential for large-scale daily snow density mapping, which will be beneficial for snow parameter estimation and water resource management. |
format |
Article in Journal/Newspaper |
author |
H. Wang X. Zhang P. Xiao T. Che Z. Zheng L. Dai W. Luan |
author_facet |
H. Wang X. Zhang P. Xiao T. Che Z. Zheng L. Dai W. Luan |
author_sort |
H. Wang |
title |
Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
title_short |
Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
title_full |
Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
title_fullStr |
Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
title_full_unstemmed |
Towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
title_sort |
towards large-scale daily snow density mapping with spatiotemporally aware model and multi-source data |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-33-2023 https://tc.copernicus.org/articles/17/33/2023/tc-17-33-2023.pdf https://doaj.org/article/9f3b105dd0b545ce8399a6e4657d28c6 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 33-50 (2023) |
op_relation |
doi:10.5194/tc-17-33-2023 1994-0416 1994-0424 https://tc.copernicus.org/articles/17/33/2023/tc-17-33-2023.pdf https://doaj.org/article/9f3b105dd0b545ce8399a6e4657d28c6 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-17-33-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
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1 |
container_start_page |
33 |
op_container_end_page |
50 |
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1766216367641460736 |