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The Comprehensive Identification Dataset for Dew, Frost, and Icing Phenomena in China (2018-2024)


ZHU Hualiang1ZHANG Miaomiao*1HONG Chen1WEN Huayang2
1 Anhui Meteorological Information Center,Hefei 2300012 Huaihe River Basin Meteorological Center,Hefei 230001

DOI:10.3974/geodb.2025.10.04.V1

Published:Oct. 2025

Visitors:39       Data Files Downloaded:0      
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Key Words:

Dew,Frost,icing phenomena,Bayesian discrimination,identification

Abstract:

To realize the automatic observation of dew, frost, and icing phenomena and obtain timely, comprehensive, and continuous data on these phenomena, this study constructs a comprehensive identification algorithm for dew, frost, and icing from 2,164 surface meteorological stations in China using the Bayes discriminant method, based on observational data of meteorological elements such as air temperature, surface temperature, relative humidity, and wind speed. A comprehensive identification product for dew, frost, and icing phenomena from 2018 to 2024 is generated, with a product frequency of once per hour. Comparison with manual observation data shows that the consistency rates of the comprehensive identification product for dew, frost, and icing are 65.6%, 90.9%, and 95.3% respectively, indicating that the product can effectively identify these three phenomena. The dataset is archived in .txt format, and consists of 2,164 data files with data size of 6.49 GB (compressed into one file with 176 MB). Currently, this product has been operationally implemented nationwide within the meteorological sector, effectively replacing manual observations of dew, frost, and icing at weather stations. It provides a foundation for advancing automated integrated meteorological observation and unattended operations at national-level meteorological stations. The resulting dataset can serve as fundamental data for weather forecasting, agricultural meteorology, road traffic prediction, and related services.

Foundation Item:

China Meteorological Administration (YBSZX2024008)

Data Citation:

ZHU Hualiang, ZHANG Miaomiao*, HONG Chen, WEN Huayang. The Comprehensive Identification Dataset for Dew, Frost, and Icing Phenomena in China (2018-2024)[J/DB/OL]. Digital Journal of Global Change Data Repository, 2025. https://doi.org/10.3974/geodb.2025.10.04.V1.

References:


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Data Product:

ID Data Name Data Size Operation
1 ChinaDewFrostIcing2018-2024.rar 181032.48KB
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