SICEv3.0 Frans Josef Land snow and ice broadband albedo and surface optical properties from Sentinel-3’s OLCI at 500 m resolution, Near Real Time (NRT)

SICE v3.0. 0.5 km Arctic land ice SSA, broadband albedo and spectral reflectance for 2017 to 2023 Timespan 1 April, to 31 September for each year 2017 to 2023 and is being updated starting ~April each year Description For Greenland, 0.5km daily data (Table 1) from the pySICE v2.1 algorithm, see Bahbah et al (2023) and Kokhanovsky et al (2023) for details. Broadband albedo "albedo_bb_planar_sw" is after Kokhanovsky et al (2019). "BBA_combination" is albedo_bb_planar_sw for albedo_bb_planar_sw values above 0.565 and is combined with an ampirical albedo for albedo_bb_planar_sw below or equal to 0.565, see Wehrlé et al (2021). Data format is GeoTiff in the EPSG:3413 - WGS 84 / NSIDC Sea Ice Polar Stereographic North. We suggest using rasterio to read the data files. The data are also available from https://thredds.geus.dk/ Data Format Data format is GeoTiff in the EPSG:3413 - WGS 84 / NSIDC Sea Ice Polar Stereographic North projection.   Table 1, SICE v3.0 data, alphabetical name, description ANG, Angström parameter for atmospheric aerosol correction AOD_550, aerosol optical depth at 550 nm from CAMS, m units al, effective absorption length, mm units albedo_bb_spherical_sw, albedo under isotropic radiation albedo_bb_planar_sw, broadband albedo albedo_spectral_planar_NN, multispectral albedo_spectral_planar, where NN is a number for bands 01-21 diagnostic_retrieval, per pixel diagnostic info cloud_mask,SCDA cloud mask cloud_mask, SCDA cloud mask cv1, quality check 1 (see ATBD) cv2, quality check 2 (see ATBD) factor<,snow covered fraction within mixed pixels grain_diameter, effective optical snow grain diameter isnow, See Table 2 lat, decimal latitude lon, decimal longitude O3_SICE, OLCI total ozone retrieval corrected for ozone scattering after Kokhanovsky et al 2020 r0, reflectance of a semi-infinite non-absorbing snow layer r_TOA_NN, multispectral TOA reflectance, where NN is a number for bands 01-21 r_BRR_NN, multispectral botttom of atmosphere reflectance, where NN is a number for bands 01-21 snow_specific_surface_area, SSA saa, solar azimuth angle sza, solar zenith angle vaa, viewing azimuth angle vza, viewing zenith angle Table 2, Diagnostic codes Diagnostic Code, Description 0, clean snow 1, polluted snow 6, polluted snow for which r0 was calculated and not derived from observations 7, polluted snow of calculated spherical albedo in bands 1 and 2 greater than 0.98 reprocessed as clean snow 100, sza exceeding 75, no retrival albedo 102, TOA reflectance at band 21 less than 0.1, no retrieval 104, grain_diameter less than 0.1, no retrieval, potential cloud flag -N, impossible to solve polluted snow albedo equation at band N See also related information below Reference Publications Kokhanovsky, A., Vandecrux, B., Wehrlé, A., Danne, O., Brockmann, C., and Box, J. E.: An improved retrieval of snow and Ice properties using spaceborne OLCI/S-3 spectral reflectance measurements: Updated atmospheric correction and snow impurity load estimation, Remote Sens. (Basel), 15, 77, https://doi.org/10.3390/rs15010077, 2022 Kokhanovsky A.A., Lamare, M. and Rozanov, V. (2020) Retrieval of the total ozone over Antarctica using Sentinel-3 ocean and land colour instrument. Journal of Quantitative Spectroscopy and Radiative Transfer 251, 107045 https://doi.org/10.1016/j.jqsrt.2020.107045 Code Bahbah, R., Wehrlé, A., Mankoff, K., Vandecrux, B., and Box, J. E.: Sentinel-3 snow and ice optical properties retrieval (SICE) version 3.0, https://doi.org/10.5281/zenodo.10058790, 2023. How to gather and read the data see https://github.com/GEUS-SICE/SICE_gather and raise any issues there. Acknowledgements SICE has been supported by the following contracts to the European Space Agency (ESA): Dec. 2016 – Jan. 2019 SEOM S34Sci Land Study 1: Snow, ESRIN Contract 4000118926/16/I-NB Dec. 2018 – Jul. 2020 EO Science For Society, ESA/Contract 4000125043/18/I-NB – ESA/AO/1-9101/17/I-NB EO SCIENCE FOR SOCIETY, Pre-operational Sentinel-3 Snow and Ice Products (SICE) Jan. 2019 – Dec. 2020 ESA PRODEX, An operational service of new Sentinel-3 algorithms for climate monitoring of the Greenland Cryosphere within the CryoClim network May 2021 – June 2023 ESA PRODEX, Seamless Integration of Sentinel-3 Albedos in a Weather-modelling System (SISAWS) Feb 2022 – Oct. 2023 ESA EO Science For Society, Snow and ICE optical and physical properties from Sentinel-3 (SICE), ESA CCN contract 4000125043/18/I-NB and the ESA Network of Resources, Related Information description of variables, inputs and outputs https://github.com/GEUS-SICE/pySICE/tree/pySICEv2.1 https://snow.geus.dk/ Questions? contact Jason Box, [e-mail]

{'SICE v3.0. 0.5 km Arctic land ice SSA, broadband albedo and spectral reflectance for 2017 to 2023 Timespan 1 April, to 31 September for each year 2017 to 2023 and is being updated starting ~April each year': 'SICE v3.0版本，0.5公里北极陆地冰面面积、宽带反照率和光谱反射率数据集，时间范围为2017年至2023年，每年4月1日至9月31日，数据每年大约从4月开始更新。', 'For Greenland, 0.5km daily data (Table 1) from the pySICE v2.1 algorithm, see Bahbah et al (2023) and Kokhanovsky et al (2023) for details.': '针对格陵兰岛，提供基于pySICE v2.1算法的0.5公里每日数据（见表1），详细内容可参考Bahbah等（2023年）和Kokhanovsky等（2023年）的研究。', 'Broadband albedo "albedo_bb_planar_sw" is after Kokhanovsky et al (2019). "BBA_combination" is albedo_bb_planar_sw for albedo_bb_planar_sw values above 0.565 and is combined with an ampirical albedo for albedo_bb_planar_sw below or equal to 0.565, see Wehrlé et al (2021).': '宽带反照率“albedo_bb_planar_sw”遵循Kokhanovsky等（2019年）的方法。"BBA_combination"指的是albedo_bb_planar_sw值高于0.565时的albedo_bb_planar_sw，对于albedo_bb_planar_sw值低于或等于0.565的情况，则与经验反照率相结合，具体可参考Wehrlé等（2021年）的研究。', 'Data format is GeoTiff in the EPSG:3413 - WGS 84 / NSIDC Sea Ice Polar Stereographic North. We suggest using rasterio to read the data files.': '数据格式为GeoTiff，坐标系为EPSG:3413 - WGS 84 / NSIDC海冰极地横 Mercator投影。建议使用rasterio读取数据文件。', 'The data are also available from https://thredds.geus.dk/': '数据亦可通过https://thredds.geus.dk/获取。', 'Data Format Data format is GeoTiff in the EPSG:3413 - WGS 84 / NSIDC Sea Ice Polar Stereographic North projection.': '数据格式：GeoTiff，投影为EPSG:3413 - WGS 84 / NSIDC海冰极地横 Mercator投影。', 'Table 1, SICE v3.0 data, alphabetical name, description': '表1，SICE v3.0数据集，按字母顺序排列的名称、描述。', 'ANG, Angström parameter for atmospheric aerosol correction': 'ANG，用于大气气溶胶校正的Angström参数。', 'AOD_550, aerosol optical depth at 550 nm from CAMS, m units': 'AOD_550，CAMS在550纳米处的气溶胶光学厚度，单位为米。', 'al, effective absorption length, mm units': 'al，有效吸收长度，单位为毫米。', 'albedo_bb_spherical_sw, albedo under isotropic radiation': 'albedo_bb_spherical_sw，各向同性辐射下的反照率。', 'albedo_bb_planar_sw, broadband albedo': 'albedo_bb_planar_sw，宽带反照率。', 'albedo_spectral_planar_NN, multispectral albedo spectral_planar, where NN is a number for bands 01-21': 'albedo_spectral_planar_NN，多光谱平面反照率，NN代表01-21波段中的波段号。', 'diagnostic_retrieval, per pixel diagnostic info': '诊断检索，每个像素的诊断信息。', 'cloud_mask,SCDA cloud mask': 'cloud_mask，SCDA云掩膜。', 'cv1, quality check 1 (see ATBD)': 'cv1，质量检查1（参见技术手册）。', 'cv2, quality check 2 (see ATBD)': 'cv2，质量检查2（参见技术手册）。', 'factor<,snow covered fraction within mixed pixels': 'factor<，混合像素中的积雪覆盖分数。', 'grain_diameter, effective optical snow grain diameter': 'grain_diameter，有效光学雪粒直径。', 'isnow, See Table 2': 'isnow，参见表2。', 'lat, decimal latitude': 'lat，十进制度数纬度。', 'lon, decimal longitude': 'lon，十进制度数经度。', 'O3_SICE, OLCI total ozone retrieval corrected for ozone scattering after Kokhanovsky et al 2020': 'O3_SICE，经Kokhanovsky等（2020年）修正的OLCI总臭氧检索，校正了臭氧散射。', 'r0, reflectance of a semi-infinite non-absorbing snow layer': 'r0，半无限非吸收雪层的反射率。', 'r_TOA_NN, multispectral TOA reflectance, where NN is a number for bands 01-21': 'r_TOA_NN，多光谱顶面反射率，NN代表01-21波段中的波段号。', 'r_BRR_NN, multispectral bottom of atmosphere reflectance, where NN is a number for bands 01-21': 'r_BRR_NN，多光谱大气底部反射率，NN代表01-21波段中的波段号。', 'snow_specific_surface_area, SSA': 'snow_specific_surface_area，雪的比表面积，SSA。', 'saa, solar azimuth angle': 'saa，太阳方位角。', 'sza, solar zenith angle': 'sza，太阳天顶角。', 'vaa, viewing azimuth angle': 'vaa，观测方位角。', 'vza, viewing zenith angle': 'vza，观测天顶角。', 'Table 2, Diagnostic codes': '表2，诊断代码。', 'Diagnostic Code, Description': '诊断代码，描述。', '0, clean snow': '0，纯净雪。', '1, polluted snow': '1，污染雪。', '6, polluted snow for which r0 was calculated and not derived from observations': '6，r0是根据计算而非观测得到的污染雪。', '7, polluted snow of calculated spherical albedo in bands 1 and 2 greater than 0.98 reprocessed as clean snow': '7，1和2波段计算出的球形反照率大于0.98的污染雪被重新处理为纯净雪。', '100, sza exceeding 75, no retrieval albedo': '100， sza超过75度，无法检索反照率。', '102, TOA reflectance at band 21 less than 0.1, no retrieval': '102，21波段的TOA反射率小于0.1，无法检索。', '104, grain_diameter less than 0.1, no retrieval, potential cloud flag -N': '104，粒度小于0.1，无法检索，潜在云标志-N。', 'See also related information below': '详见以下相关信息。', 'Reference Publications': '参考文献。', 'Kokhanovsky, A., Vandecrux, B., Wehrlé, A., Danne, O., Brockmann, C., and Box, J. E.: An improved retrieval of snow and Ice properties using spaceborne OLCI/S-3 spectral reflectance measurements: Updated atmospheric correction and snow impurity load estimation, Remote Sens. (Basel), 15, 77, https://doi.org/10.3390/rs15010077, 2022': 'Kokhanovsky等：利用空间OLCI/S-3光谱反射率测量改进雪和冰性质检索：更新大气校正和雪杂质负荷估计，Remote Sens. (Basel)，15，77，https://doi.org/10.3390/rs15010077，2022。', 'Kokhanovsky A.A., Lamare, M. and Rozanov, V. (2020) Retrieval of the total ozone over Antarctica using Sentinel-3 ocean and land colour instrument. Journal of Quantitative Spectroscopy and Radiative Transfer 251, 107045 https://doi.org/10.1016/j.jqsrt.2020.107045': 'Kokhanovsky等（2020）：利用Sentinel-3海洋和陆地颜色仪器检索南极洲的总臭氧。Journal of Quantitative Spectroscopy and Radiative Transfer 251，107045 https://doi.org/10.1016/j.jqsrt.2020.107045。', 'Code Bahbah, R., Wehrlé, A., Mankoff, K., Vandecrux, B., and Box, J. E.: Sentinel-3 snow and ice optical properties retrieval (SICE) version 3.0, https://doi.org/10.5281/zenodo.10058790, 2023.': 'Bahbah等：Sentinel-3雪和冰光学性质检索（SICE）版本3.0，https://doi.org/10.5281/zenodo.10058790，2023。', 'How to gather and read the data see https://github.com/GEUS-SICE/SICE_gather and raise any issues there.': '有关数据收集和读取方法，请参阅https://github.com/GEUS-SICE/SICE_gather，并在那里提出任何问题。', 'Acknowledgements SICE has been supported by the following contracts to the European Space Agency (ESA): Dec. 2016 – Jan. 2019 SEOM S34Sci Land Study 1: Snow, ESRIN Contract 4000118926/16/I-NB Dec. 2018 – Jul. 2020 EO Science For Society, ESA/Contract 4000125043/18/I-NB – ESA/AO/1-9101/17/I-NB EO SCIENCE FOR SOCIETY, Pre-operational Sentinel-3 Snow and Ice Products (SICE) Jan. 2019 – Dec. 2020 ESA PRODEX, An operational service of new Sentinel-3 algorithms for climate monitoring of the Greenland Cryosphere within the CryoClim network May 2021 – June 2023 ESA PRODEX, Seamless Integration of Sentinel-3 Albedos in a Weather-modelling System (SISAWS) Feb 2022 – Oct. 2023 ESA EO Science For Society, Snow and ICE optical and physical properties from Sentinel-3 (SICE), ESA CCN contract 4000125043/18/I-NB and the ESA Network of Resources': '致谢：SICE项目得到了以下欧洲航天局（ESA）合同的资助：2016年12月 – 2019年1月 SEOM S34Sci 陆地研究1：雪，ESRIN合同4000118926/16/I-NB；2018年12月 – 2020年7月 EO Science For Society，ESA/Contract 4000125043/18/I-NB – ESA/AO/1-9101/17/I-NB EO SCIENCE FOR SOCIETY，Sentinel-3雪和冰产品（SICE）的试运行；2019年1月 – 2020年12月 ESA PRODEX，CryoClim网络内格陵兰冰冻圈气候监测的新Sentinel-3算法的运行服务；2021年5月 – 2023年6月 ESA PRODEX，天气建模系统中Sentinel-3反照率的无缝集成（SISAWS）；2022年2月 – 2023年10月 ESA EO Science For Society，Sentinel-3雪和冰的光学和物理性质（SICE），ESA CCN合同4000125043/18/I-NB和ESA资源网络。', 'description of variables, inputs and outputs': '变量、输入和输出的描述。', 'https://github.com/GEUS-SICE/pySICE/tree/pySICEv2.1': 'https://github.com/GEUS-SICE/pySICE/tree/pySICEv2.1', 'https://snow.geus.dk/': 'https://snow.geus.dk/', 'Questions? contact Jason Box, [e-mail]': '如有疑问，请联系Jason Box，邮箱：[e-mail]。'}