NH-SWE: Northern Hemisphere Snow Water Equivalent dataset based on in-situ snow depth time series and the regionalisation of the ΔSNOW model

Time series of daily Snow Water Equivalent (SWE) and Snow Density over the Northern Hemisphere, based on in-situ station observations of snow depth converted to SWE using the ΔSNOW model (Winkler et al., 2021) and regionalised parameters. An extensive description of the dataset and the method to generate it can be found in the data descriptor manuscript that has been submitted to the journal Earth System Science Data. <strong>Dataset:</strong> A total of 11,0071 time series of modelled SWE and estimated snow density at the point scale, spanning 1950-2022, at daily resolution. <strong>Files: </strong>The dataset is provided in two different formats: Individual <em>.csv</em> files for each station in the NH-SWE dataset at <em>"NH_SWE_dataset_vector_files.zip"</em> Full-dataset <em>.csv </em>matrices with dates as rows and NH-SWE stations as columns at <em>"NH_SWE_dataset_matrix_files.zip"</em> <strong>Metadata:<em> </em></strong><em>"NH_SWE_METADATA.csv"</em> Includes information on NH-SWE stations location (ID, country, station name, coordinates, elevation), data source, length of time series, model parameters and the climate variables used to estimate them, and average snow climatology such as average maximum snow depth, average peak SWE and average maximum snow cover duration. More details and units in the <em>"README_fileformats.txt"</em> file. <strong>ΔSNOW model parameter regionalisation: </strong>The code to obtain the ΔSNOW model parameters based on climate variables for all the stations in the NH-SWE dataset is shared in<em><strong> </strong>"DeltaSNOW_parameter_regionalisation.zip"</em>. The method is extensively described in the data descriptor manuscript by Fontrodona-Bach et al., (2023) submitted to Earth System Science Data. More details in the <em>"README_regionalisation.txt"</em> file. <strong>Data use: </strong>Free, provided adequate citation of both the data descriptor manuscript and the zenodo record. See <em>"README_datausage.txt"</em> <strong>Version history:</strong><br> v1: Initial upload. The ΔSNOW model regionalisation was missing.<br> v2: Manuscript submission version. Updated dataset and includes the ΔSNOW model regionalisation code.本数据集包含北半球逐日雪水当量（Snow Water Equivalent, SWE）与积雪密度时序数据，基于原位台站积雪深度观测数据，通过ΔSNOW模型（Winkler等人，2021）结合区域化参数转换为雪水当量所得。有关本数据集及其构建方法的详细说明，请参阅已提交至《Earth System Science Data》期刊的数据集描述手稿。<br><strong>数据集概况：</strong>共计110071条点尺度模拟雪水当量与估算积雪密度的时序序列，时间覆盖1950年至2022年，分辨率为逐日尺度。<br><strong>数据文件：</strong>本数据集提供两种格式的数据文件：单站独立.csv格式文件，存储于压缩包"NH_SWE_dataset_vector_files.zip"中，包含NH-SWE数据集各台站的单独.csv文件；全数据集.csv矩阵文件，存储于压缩包"NH_SWE_dataset_matrix_files.zip"中，该矩阵以日期为行、NH-SWE台站为列。<br><strong>元数据：</strong>元数据文件为"NH_SWE_METADATA.csv"，包含NH-SWE台站的位置信息（台站ID、所属国家、台站名称、坐标、海拔）、数据来源、时序序列长度、模型参数、用于估算的气候变量，以及平均积雪气候学特征，如平均最大积雪深度、平均峰值雪水当量与平均最大积雪覆盖时长。详细信息与单位说明请参阅"README_fileformats.txt"文件。<br><strong>ΔSNOW模型参数区域化：</strong>本数据集所有台站基于气候变量获取ΔSNOW模型参数的代码已共享于压缩包"DeltaSNOW_parameter_regionalisation.zip"中。相关方法的详细说明请参阅Fontrodona-Bach等人（2023）提交至《Earth System Science Data》的数据集描述手稿，更多细节可查看"README_regionalisation.txt"文件。<br><strong>数据使用：</strong>本数据集免费开放使用，但需恰当引用本数据集描述手稿与Zenodo存档。具体要求请参阅"README_datausage.txt"文件。<br><strong>版本更新历史：</strong><br>v1：初始上传版本，缺失ΔSNOW模型区域化代码；<br>v2：手稿提交版本，更新了数据集并补充了ΔSNOW模型区域化代码。