多源数据融合的南极冰盖冻融数据集(1999-2019)

Surface Freeze-Thaw Dataset Development of the Antarctic Ice Sheet Based on Multisource Data(1999-2019)

南极冰盖表面融化是全球气候变化的敏感因子,其对于南极冰盖的物质能量平衡具有重要影响。本数据集利用微波辐射计、微波散射计和区域气候模型数据,基于阈值法获取各个数据源的冻融时间序列,配准后采用Categorical Triple Collocation(CTC)方法进行融合,得到1999-2019年南极冰盖冻融产品。该数据集4.45 km的空间分辨率高于已发布的产品,且结合了不同数据源的优势,能够提供数据时段内每日南极冰盖表面融化情况。该数据集的数据类型为整型,其中1代表融化,-1代表冻结。数据集存储为.nc格式,压缩后的数据量为35.7 MB。

Surface melting of the Antarctic Ice Sheet(AIS)is a factor that is sensitive to global climate changes.It constitutes a considerable contribution to the surface mass and energy balance of the AIS.In this study,we ranked the snowmelt determined by the radiometer,scatterometer,and climate model using categorical triple collocation(CTC),which can identify the most accurate observations with unknown true values.Then,a CTC fusion product was generated by adopting the best data source for each pixel during 1999–2019.By combining the advantages of the different observations,the fusion product reports the daily freeze-thaw status of the AIS,with a high spatial resolution of 4.45 km.The data used in this dataset are stored as integers in which 1 represents melting and–1 represents freezing.The dataset is archived in the.nc format,and the file size is 35.7 MB after compression.