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Advanced Scatterometer-derived Arctic and Antarctic backscatter anisotropy parameter maps

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Research Data Australia2024-08-03 收录
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Using the EUMETSAT Advanced Scatterometer, a C-band scatterometer in polar orbit currently onboard three platforms, we parameterise anisotropy from the normalised backscattering cross-section of both polar regions. This dataset uses a complex parameterisation of backscatter measurements from one to several days, to parameterise the backscatter into several parameters. These parameters have proven polar parameter retrieval application. For more details on the backscatter parameterisation, see Fraser et al., 2014 (https://ieeexplore.ieee.org/document/6527913). This dataset consists of 5-daily, 2-daily and daily (depending on satellite platform availability) maps of all backscatter parameters spanning the time period from March 2007 to December 2020, with updates planned. Maps are presented as NetCDF files, and are provided in the NSIDC polar stereographic projection (12.5 km resolution, both hemispheres - see https://nsidc.org/data/polar-stereo/ps_grids.html).A data update was provided on 2022-01-17.A further data update of minor corrections was provided on 2024-12-17.

本研究依托欧洲气象卫星组织(EUMETSAT)先进散射计(Advanced Scatterometer)——一款当前搭载于三颗极轨平台的C波段散射计(C-band scatterometer),基于南北两极区域的归一化后向散射截面(normalised backscattering cross-section)参数化各向异性(anisotropy)特征。 本数据集采用针对1至数天的后向散射测量的复合参数化方案,将后向散射信号转化为多组特征参数,此类参数已被证实可应用于极地参数反演(polar parameter retrieval)工作。有关后向散射参数化方案的更多细节,请参阅Fraser等人2014年的研究(https://ieeexplore.ieee.org/document/6527913)。 本数据集涵盖2007年3月至2020年12月期间的全部后向散射参数地图,时间分辨率包含5天、2天及逐日(具体取决于卫星平台可用性),并计划后续更新。数据集以NetCDF文件格式存储,采用美国国家冰雪数据中心(NSIDC)极地立体投影(polar stereographic projection),分辨率为12.5公里,覆盖南北两极半球——详细网格信息请参见https://nsidc.org/data/polar-stereo/ps_grids.html。 数据集曾于2022年1月17日发布一次更新;2024年12月17日又发布了包含小幅修正的进一步更新。

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