The near-surface freeze-thaw affects the water and energy exchanges mode and efficiency between the land and atmosphere. The transition of the freeze/thaw state affects the pattern of runoff concentration, which has an important impact on regional and global water cycle. Based on the remote sensing data of AMSR-E/2 passive microwave sensors and MODIS optical sensor, this data set uses the discriminant function algorithm and its downscaling method to produce a global mapping of near-surface freeze-thaw states with higher spatial resolution. This product covers the time period from 2002 to 2018 (daily), and spatial coverage is global scale (spatial resolution of 0.05°). It can be used to analyze the start/end time of global near-surface freeze/thaw states, the duration of freezing/thawing and their changing trends, and provide data support for studying the mechanism of water cycle and energy exchanges in the context of global change.
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Zhao Tianjie. Global 0.05° near-surface freeze-thaw states data set (2002-2018). National Tibetan Plateau Data Center, 2019. doi: 10.11888/Geocry.tpdc.270283. (Download the reference： RIS | Bibtex )
Related Literatures:1. Hu, T., Zhao, T., Shi, J., Wu, S., Liu, D., Qin, H., & Zhao, K. (2017). High-resolution mapping of freeze/thaw status in china via fusion of MODIS and AMSR2 data. Remote Sensing, 9(12), 1339.( View Details | Bibtex)
2. Zhao, T., Shi, J., Hu, T., Zhao, L., Zou, D., Wang, T., ... & Wang, P. (2017). Estimation of high‐resolution near‐surface freeze/thaw state by the integration of microwave and thermal infrared remote sensing data on the Tibetan Plateau. Earth and Space Science, 4(8), 472-484.( View Details | Bibtex)
Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.
CASEarth:Big Earth Data for Three Poles（grant No. XDA19070000） (No:XDA19000000)
Second Tibetan Plateau Scientific Expedition Program
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