Probability that the seafloor is below the halocline in the Baltic - Original point dataset – Version 2022

Based on DHI operational Hydrodynamic 3D Model DKBS2hd model run results, a point dataset describing for each year the probability of a certain seabed location in the Baltic Sea being located below the deep halocline has been created. The spatial coverage is the Baltic Sea. The spatial resolution is 5km. The temporal coverage is 20 years (2001-2020). The dataset is a point shapefile, the attribute table of which contains the following columns - 20 columns whose name is in the form p[yyyy] (e.g; p2001), where yyyy is the year: for the year yyyy, probability of the point location being located below the deep halocline - column ‘mean’: probability average (i.e. average of the 20 yearly probabilities) - column ‘std’: probability standard deviation across the 20 years The development of the original point dataset was funded by the EMODnet lot ‘Seabed Habitats’ for use in the development of the EUSeaMap product, more specifically in modeling the spatial distribution of the biological zones ‘circalittoral’ and ‘offshore circalittoral’. According to the EUNIS habitat classification, in the Baltic Sea the circalittoral is above the halocline/pycnocline, while the offshore circalittoral is below.本数据集依托丹麦水力研究所（DHI）运营的三维水动力模型DKBS2hd的运行结果构建，为一套点位数据集，用于描述波罗的海各年度内，单海底点位处于深水盐跃层(halocline)以下的概率。数据集的空间覆盖范围为整个波罗的海，空间分辨率为5千米，时间覆盖跨度为20年（2001年至2020年）。 该数据集为点位形状文件(point shapefile)，其属性表包含以下字段： - 20个命名格式为p[yyyy]的字段（例如p2001），其中yyyy代表对应年份，字段值为该年度内点位处于深水盐跃层以下的概率； - 字段‘mean’：20个年度概率的平均值； - 字段‘std’：20年间概率的标准差。 本原始点位数据集的开发由欧洲海洋观测与数据网络(EMODnet)的‘海底生境(Seabed Habitats)’专项批次资助，用于欧盟海图(EUSeaMap)产品的研发，具体应用于生物群落带‘环潮下带(circalittoral)’与‘离岸环潮下带(offshore circalittoral)’的空间分布建模。 根据欧洲自然生境信息系统(EUNIS)的生境分类标准，波罗的海区域内的环潮下带位于盐跃层(halocline)/密度跃层(pycnocline)之上，而离岸环潮下带则位于其下方。