TY  - Data
T1  - China AVHRR Daily Cloudless 5 km Snow Area Product Dataset
A1  - Xiaohua Hao 
A1  - Ji Wenzheng
A1  - Zhao Qin
A1  - Sun Xingliang
A1  - Wangjian
A1  - Li Hongyi
DO  - 10.12072/ncdc.I-SNOW.db0005.2020
PY  - 2021
DA  - 2021-12-14
PB  - National Cryosphere Desert Data Center
AB  - Snow cover is an important component of the cryosphere, and its coverage affects the energy balance between the Earth and the atmosphere, thereby affecting climate and environmental changes. Snow cover area is one of the important snow cover parameters and an important input for hydrological and climate models. This dataset focuses on the characteristics of snow cover in China and is based on the AVHRR-CDR reflectance product. A multi-level decision tree snow discrimination algorithm has been developed. At the same time, hidden Markov algorithm and multi-source data fusion method have been used to achieve complete cloud removal of the product. A daily cloudless snow cover area dataset with a spatial resolution of 5 km from 1980 to 2020 has been prepared. This dataset is stored in the HDF5 file format, with each HDF5 file containing 18 data elements, including data values, data start dates, longitude and latitude, etc. At the same time, in order to quickly preview the distribution of snow cover, the daily file contains thumbnail images of the snow cover area, stored in jpg format. The dataset also includes a user manual for ease of use. This dataset will be continuously supplemented and improved based on real-time satellite remote sensing data and algorithm updates (as of December 2020), and will be fully open and shared
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/b84eefb4-b6eb-45bf-9ff0-4198ffdd49d1
ER  -