{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:21.234413", "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": "2024-Oct-18_to_2024-Oct-21_27.5_43.0"}, "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": 2024100000371}, "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": "October 18 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 21 2024"}, "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": 58895.44004100103}, "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": ["Bulgaria", "Greece", "Romania", "T\u00fcrkiye"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe", "Europe", "Asia"]}, "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": ["Black Sea"]}, "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": 43.0}, "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": 27.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[25.0, 42.75], [25.5, 42.54], [25.82, 42.68], [25.96, 43.0], [25.75, 43.5], [25.85, 43.75], [25.75, 44.0], [25.97, 44.53], [26.32, 44.68], [26.47, 45.03], [27.0, 45.25], [27.25, 45.15], [27.5, 45.25], [27.75, 45.15], [28.0, 45.25], [28.53, 45.03], [28.75, 44.5], [28.65, 44.25], [28.75, 44.0], [28.65, 43.75], [28.75, 43.5], [28.65, 43.25], [28.75, 43.0], [28.53, 42.47], [28.18, 42.32], [28.03, 41.97], [27.68, 41.82], [27.53, 41.47], [27.18, 41.32], [27.03, 40.97], [26.68, 40.82], [26.53, 40.47], [26.0, 40.25], [25.75, 40.35], [25.5, 40.25], [24.97, 40.47], [24.75, 41.0], [24.85, 41.25], [24.82, 41.32], [24.47, 41.47], [24.25, 42.0], [24.47, 42.53], [25.0, 42.75]]]]}}, "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": {"2024-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 41.47], [24.25, 42.0], [24.47, 42.53], [25.0, 42.75], [25.5, 42.54], [25.82, 42.68], 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[28.65, 43.75], [28.75, 43.5], [28.65, 43.25], [28.75, 43.0], [28.53, 42.47], [28.18, 42.32], [28.03, 41.97], [27.68, 41.82], [27.53, 41.47], [27.18, 41.32], [27.03, 40.97], [26.68, 40.82], [26.53, 40.47], [26.0, 40.25], [25.75, 40.35], [25.5, 40.25], [24.97, 40.47], [24.75, 41.0], [24.85, 41.25], [24.82, 41.32], [24.47, 41.47]]]]}, "2024-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 41.47], [24.25, 42.0], [24.47, 42.53], [25.0, 42.75], [25.5, 42.54], [25.82, 42.68], [25.96, 43.0], [25.75, 43.5], [25.85, 43.75], [25.75, 44.0], [25.97, 44.53], [26.32, 44.68], [26.47, 45.03], [27.0, 45.25], [27.25, 45.15], [27.5, 45.25], [27.75, 45.15], [28.0, 45.25], [28.53, 45.03], [28.75, 44.5], [28.65, 44.25], [28.75, 44.0], [28.65, 43.75], [28.75, 43.5], [28.65, 43.25], [28.75, 43.0], [28.53, 42.47], [28.18, 42.32], [28.03, 41.97], [27.68, 41.82], [27.53, 41.47], [27.18, 41.32], [27.03, 40.97], [26.68, 40.82], [26.53, 40.47], [26.0, 40.25], [25.75, 40.35], [25.5, 40.25], [24.97, 40.47], [24.75, 41.0], [24.85, 41.25], [24.82, 41.32], [24.47, 41.47]]]]}, "2024-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.0, 41.25], [24.47, 41.47], [24.25, 42.0], [24.47, 42.53], [25.0, 42.75], [25.5, 42.54], [26.0, 42.75], [26.25, 42.65], [26.32, 42.68], [26.46, 43.0], [26.25, 43.5], [26.47, 44.03], [27.0, 44.25], [27.25, 44.15], [27.32, 44.18], [27.35, 44.25], [27.25, 44.5], [27.47, 45.03], [28.0, 45.25], [28.53, 45.03], [28.75, 44.5], [28.65, 44.25], [28.75, 44.0], [28.65, 43.75], [28.75, 43.5], [28.53, 42.97], [28.18, 42.82], [28.15, 42.75], [28.25, 42.5], [28.03, 41.97], [27.68, 41.82], [27.53, 41.47], [27.18, 41.32], [27.03, 40.97], [26.5, 40.75], [25.97, 40.97], [25.82, 41.32], [25.5, 41.46], [25.0, 41.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.310552624308514}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.070056809636914}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.733106622940454, 7.918343333709004, 7.869531934689235, 8.0212857759916]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.550473785400413, 5.796222941080771, 5.803535715738974, 6.550876871744833]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.363685964669755, -5.11502670707623, -5.001014069683573, -4.5309441845992815]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.310552624308514, -5.936482988229045, -5.957401974157847, -5.118714721141373]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6589497101093913, -1.6110158211615144, -1.6289670598051127, -1.5368505981902767]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.841950496869864, -1.7887098992476422, -1.8844465275106317, -1.641418562025503]}}