{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:48.353339", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2021-Aug-16_to_2021-Aug-19_354.0_43.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2021080000778}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 16 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 116664.77641987437}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Spain"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 43.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 353.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-4.0, 42.25], [-4.53, 42.47], [-4.7, 42.88], [-5.0, 42.75], [-5.25, 42.85], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.25, 42.85], [-6.5, 42.75], [-6.75, 42.85], [-7.0, 42.75], [-7.53, 42.97], [-7.75, 43.5], [-7.53, 44.03], [-7.12, 44.2], [-7.25, 44.5], [-7.03, 45.03], [-6.68, 45.18], [-6.53, 45.53], [-6.18, 45.68], [-6.03, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.18, 46.18], [-5.03, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.18, 46.68], [-3.03, 47.03], [-2.5, 47.25], [-1.97, 47.03], [-1.75, 46.5], [-1.85, 46.25], [-1.82, 46.18], [-1.47, 46.03], [-1.32, 45.68], [-0.97, 45.53], [-0.75, 45.0], [-0.97, 44.47], [-1.5, 44.25], [-1.75, 44.35], [-1.82, 44.32], [-1.85, 44.25], [-1.82, 44.18], [-1.47, 44.03], [-1.25, 43.5], [-1.47, 42.97], [-2.0, 42.75], [-2.25, 42.85], [-2.32, 42.82], [-2.47, 42.47], [-3.0, 42.25], [-3.25, 42.35], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe", "Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.0, 42.25], [-4.529999999999973, 42.47], [-4.75, 43.0], [-4.529999999999973, 43.53], [-4.0, 43.75], [-3.4700000000000273, 43.53], [-3.25, 43.0], [-3.4700000000000273, 42.47], [-4.0, 42.25]]], [[[-6.529999999999973, 42.97], [-6.75, 43.5], [-6.529999999999973, 44.03], [-6.0, 44.25], [-5.75, 44.15], [-5.5, 44.25], [-4.970000000000027, 44.03], [-4.75, 43.5], [-4.970000000000027, 42.97], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.529999999999973, 42.97]]]]}, "2021-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.25, 44.5], [-7.029999999999973, 45.03], [-6.680000000000007, 45.18], [-6.529999999999973, 45.53], [-6.180000000000007, 45.68], [-6.029999999999973, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.180000000000007, 46.18], [-5.029999999999973, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.180000000000007, 46.68], [-3.0299999999999727, 47.03], [-2.5, 47.25], [-1.9700000000000273, 47.03], [-1.75, 46.5], [-1.8500000000000227, 46.25], [-1.8199999999999932, 46.18], [-1.4700000000000273, 46.03], [-1.3199999999999932, 45.68], [-0.9700000000000273, 45.53], [-0.75, 45.0], [-0.9700000000000273, 44.47], [-1.5, 44.25], [-1.75, 44.35], [-1.8199999999999932, 44.32], [-1.8500000000000227, 44.25], [-1.8199999999999932, 44.18], [-1.4700000000000273, 44.03], [-1.25, 43.5], [-1.4700000000000273, 42.97], [-2.0, 42.75], [-2.25, 42.85], [-2.319999999999993, 42.82], [-2.4700000000000273, 42.47], [-3.0, 42.25], [-3.25, 42.35], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25], [-4.529999999999973, 42.47], [-4.699999999999989, 42.88], [-5.0, 42.75], [-5.25, 42.85], [-5.5, 42.75], [-5.75, 42.85], [-6.0, 42.75], [-6.25, 42.85], [-6.5, 42.75], [-6.75, 42.85], [-7.0, 42.75], [-7.529999999999973, 42.97], [-7.75, 43.5], [-7.529999999999973, 44.03], [-7.1200000000000045, 44.2], [-7.25, 44.5]]]]}, "2021-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.25, 44.5], [-7.029999999999973, 45.03], [-6.680000000000007, 45.18], [-6.529999999999973, 45.53], [-6.180000000000007, 45.68], [-6.029999999999973, 46.03], [-5.5, 46.25], [-5.25, 46.15], [-5.180000000000007, 46.18], [-5.029999999999973, 46.53], [-4.5, 46.75], [-4.25, 46.65], [-4.0, 46.75], [-3.75, 46.65], [-3.5, 46.75], [-3.25, 46.65], [-3.180000000000007, 46.68], [-3.0299999999999727, 47.03], [-2.5, 47.25], [-1.9700000000000273, 47.03], [-1.75, 46.5], [-1.8500000000000227, 46.25], [-1.8199999999999932, 46.18], [-1.4700000000000273, 46.03], [-1.3199999999999932, 45.68], [-0.9700000000000273, 45.53], [-0.75, 45.0], [-0.9700000000000273, 44.47], [-1.5, 44.25], [-1.75, 44.35], [-1.8199999999999932, 44.32], [-1.8500000000000227, 44.25], [-1.8199999999999932, 44.18], [-1.4700000000000273, 44.03], [-1.25, 43.5], [-1.4700000000000273, 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over entire duration", "value": -4.568095727910475}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1337382563609495}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.346295528991902, 17.761866974976897, 17.588910197002633, 17.938115243703123]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.44060113601347, 13.792516241276985, 13.49235397426645, 14.978285196934905]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.384022267650001, -2.089242134956929, -2.293671880768114, -2.001641339187223]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.439721975244993, -4.2028335978469045, -4.568095727910475, -3.457693600164646]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4322697542731884, -1.6450090381811981, -1.730418647016801, -1.5583186709565255]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4547493052047211, -2.049826412839753, -2.1538023572755023, -1.8253717910012424]}}