ECMWF daily maximum volumetric soil moisture fraction under 0.2 - Kent (UK), 2022
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Demonstration Case Name Multi-hazards in the Southeast UK region Dataset Title ECMWF daily maximum volumetric soil moisture fraction under 0.2 - Kent (UK), 2022 Dataset Description This dataset consists of: ECMWF_Daily_VSoilL1max_Kent2022.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) for each date in 2022 for the wider Kent region in Southeast UK. ECMWF_Daily_VSoilL1max_below_point2_binary_mask_Kent2022.tif: a multi-layer binary mask image where the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) is below the threshold of 0.2, indicative of drought conditions, for each date in 2022 for the wider Kent region in Southeast UK. ECMWF_Daily_VSoilL1max_below_point2_mask_applied_Kent2022_1km.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) values after application of the binary mask for each date in 2022 for the wider Kent region in Southeast UK. Data was generated using code developed within the Google Earth Engine online platform and output in GeoTIFF for interoperability and comparative analysis within GIS. Key Methodologies Calculation where pixels are under a threshold of 0.2 for each date in the 2022 daily maximum volumetric soil moisture fraction in layer 1 variable (volumetric_soil_moisture_layer_1_max) multi-date image stack, coded in Google Earth Engine online platform. Output in raster format. Temporal Domain Daily: 1st January 2022 to 31st December 2022. Spatial Domain Geographic extent covering the region of Kent, Southeast UK. Projected Coordinate System: British National Grid (EPSG:27700) Spatial Extent Bounding Box: Upper Left (182000N, 509000E), Lower Right (95000N, 641000E) Spatial Resolution: 1km x 1km (resampled from original 11km data in GEE) Key Indicators Daily binary image stack indicating where pixels fail to reach the volumetric soil moisture threshold of 0.2, threshold indicative of drought conditions. Data Format GeoTIFF (*.tif) Source Data Primary source: ECMWF Climate Reanalysis ERA5-Land Daily Aggregated dataset (variable: ‘volumetric_soil_moisture_layer_1_max), accessed through the Google Earth Engine online platform (GEE) made available to by the Copernicus Climate Data Store (https://cds.climate.copernicus.eu/) under CC-BY-4.0 licence (https://creativecommons.org/licenses/by/4.0/). Accessibility 10.5281/zenodo.17130778 Stakeholder Relevance Urban planning departmentsEmergency response organizationsInfrastructure development teamsDisaster risk assessment analysts Limitations/Assumptions Original spatial resolution of data 11km (as available in GEE). Additional Information Technical specifications: GeoTIFF format requires use of a multi-band image visualisation package Binary pixel values: 0 representing above threshold, 1 representing beneath threshold Non binary mask images: pixel values respresent the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) as a fraction within that pixel. Contact Information kmcm@bgs.ac.uk
演示案例名称 英国东南部地区多灾害 数据集标题 英国肯特地区2022年ECMWF每日最大土壤体积含水量(阈值0.2以下)数据集 数据集描述 本数据集包含以下文件: 1. `ECMWF_Daily_VSoilL1max_Kent2022.tif`:多层影像,每层对应2022年英国东南部广义肯特地区每日第一层土壤(0-7cm)的欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts,ECMWF)每日最大体积含水量数据。 2. `ECMWF_Daily_VSoilL1max_below_point2_binary_mask_Kent2022.tif`:多层二值掩膜影像,每层对应2022年英国东南部广义肯特地区每日第一层土壤体积含水量低于0.2阈值(表征干旱条件)的区域。 3. `ECMWF_Daily_VSoilL1max_below_point2_mask_applied_Kent2022_1km.tif`:多层影像,每层为应用上述二值掩膜后,2022年英国东南部广义肯特地区每日第一层土壤的ECMWF每日最大体积含水量数据。 本数据集通过谷歌地球引擎(Google Earth Engine,GEE)平台开发的代码生成,输出为GeoTIFF格式,以支持地理信息系统(Geographic Information System,GIS)中的互操作与对比分析。 关键方法 针对2022年每日最大第一层土壤体积含水量(volumetric_soil_moisture_layer_1_max)多日期影像栈,计算每个日期下像素值低于0.2阈值的区域,通过谷歌地球引擎平台编码实现,最终输出为栅格格式。 时间范围 每日尺度:2022年1月1日至2022年12月31日。 空间范围 地理覆盖范围:英国东南部肯特地区。 投影坐标系:英国国家坐标系(EPSG:27700) 空间范围 bounding box:左上角(北距182000,东距509000),右下角(北距95000,东距641000) 空间分辨率:1km×1km(由原始11km数据在GEE中重采样得到) 关键指标 每日二值影像栈,用于指示像素值未达到0.2体积土壤含水量阈值的区域,该阈值可表征干旱条件。 数据格式 GeoTIFF(*.tif) 源数据 原始数据为欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts,ECMWF)气候再分析ERA5-Land每日聚合数据集(变量:`volumetric_soil_moisture_layer_1_max`),通过谷歌地球引擎平台获取,由哥白尼气候数据服务中心(https://cds.climate.copernicus.eu/)以CC-BY-4.0许可(https://creativecommons.org/licenses/by/4.0/)提供。 可访问性 DOI:10.5281/zenodo.17130778 相关利益方 城市规划部门、应急响应机构、基础设施开发团队、灾害风险评估分析师。 局限性与假设 原始数据空间分辨率为11km(GEE平台中可获取的原始分辨率)。 附加信息 技术说明:GeoTIFF格式需使用多波段影像可视化工具进行读取;二值像素值规则:0代表像素含水量高于阈值,1代表像素含水量低于阈值;非二值掩膜影像:像素值为ECMWF每日第一层(0-7cm)土壤体积含水量在该像素内的占比分数。 联系方式 kmcm@bgs.ac.uk



