{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:49.660025", "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": "2025-Nov-20_to_2025-Nov-22_354.5_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": 2025110000580}, "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": "November 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 22 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 89392.40683133114}, "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": ["Portugal", "Spain"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "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": 43.0}, "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": 354.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.68, 43.68], [-8.53, 44.03], [-8.0, 44.25], [-7.75, 44.15], [-7.5, 44.25], [-7.25, 44.15], [-7.0, 44.25], [-6.47, 44.03], [-6.32, 43.68], [-6.25, 43.65], [-6.0, 43.75], [-5.75, 43.65], [-5.5, 43.75], [-5.25, 43.65], [-5.0, 43.75], [-4.75, 43.65], [-4.5, 43.75], [-4.25, 43.65], [-4.0, 43.75], [-3.75, 43.65], [-3.5, 43.75], [-2.97, 43.53], [-2.75, 43.0], [-2.97, 42.47], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25], [-4.25, 42.35], [-4.32, 42.32], [-4.47, 41.97], [-5.0, 41.75], [-5.25, 41.85], [-5.32, 41.82], [-5.47, 41.47], [-5.82, 41.32], [-5.97, 40.97], [-6.32, 40.82], [-6.35, 40.75], [-6.25, 40.5], [-6.47, 39.97], [-6.82, 39.82], [-6.97, 39.47], [-7.5, 39.25], [-7.75, 39.35], [-8.0, 39.25], [-8.25, 39.35], [-8.5, 39.25], [-9.03, 39.47], [-9.25, 40.0], [-9.03, 40.53], [-8.68, 40.68], [-8.65, 40.75], [-8.75, 41.0], [-8.65, 41.25], [-8.68, 41.32], [-9.03, 41.47], [-9.25, 42.0], [-9.12, 42.3], [-9.53, 42.47], [-9.75, 43.0], [-9.53, 43.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.529999999999973, 42.47], [-9.75, 43.0], [-9.529999999999973, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.680000000000007, 43.68], [-8.529999999999973, 44.03], [-8.0, 44.25], [-7.75, 44.15], [-7.5, 44.25], [-7.25, 44.15], [-7.0, 44.25], [-6.470000000000027, 44.03], [-6.319999999999993, 43.68], [-6.25, 43.65], [-6.0, 43.75], [-5.75, 43.65], [-5.5, 43.75], [-5.25, 43.65], [-5.0, 43.75], [-4.75, 43.65], [-4.5, 43.75], [-4.25, 43.65], [-4.0, 43.75], [-3.75, 43.65], [-3.5, 43.75], [-2.9700000000000273, 43.53], [-2.75, 43.0], [-2.9700000000000273, 42.47], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25], [-4.25, 42.35], [-4.319999999999993, 42.32], [-4.470000000000027, 41.97], [-5.0, 41.75], [-5.25, 41.85], [-5.319999999999993, 41.82], [-5.470000000000027, 41.47], [-5.819999999999993, 41.32], [-5.970000000000027, 40.97], [-6.319999999999993, 40.82], [-6.350000000000023, 40.75], [-6.25, 40.5], [-6.470000000000027, 39.97], [-6.819999999999993, 39.82], [-6.970000000000027, 39.47], [-7.5, 39.25], [-7.75, 39.35], [-8.0, 39.25], [-8.25, 39.35], [-8.5, 39.25], [-9.029999999999973, 39.47], [-9.25, 40.0], [-9.029999999999973, 40.53], [-8.680000000000007, 40.68], [-8.649999999999977, 40.75], [-8.75, 41.0], [-8.649999999999977, 41.25], [-8.680000000000007, 41.32], [-9.029999999999973, 41.47], [-9.25, 42.0], [-9.120000000000005, 42.3], [-9.529999999999973, 42.47]]]]}, "2025-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.529999999999973, 42.47], [-9.75, 43.0], [-9.529999999999973, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.680000000000007, 43.68], [-8.529999999999973, 44.03], [-8.0, 44.25], [-7.75, 44.15], [-7.5, 44.25], [-7.25, 44.15], [-7.0, 44.25], [-6.470000000000027, 44.03], [-6.319999999999993, 43.68], [-6.25, 43.65], [-6.0, 43.75], [-5.75, 43.65], [-5.5, 43.75], [-5.25, 43.65], [-5.0, 43.75], [-4.75, 43.65], [-4.5, 43.75], [-4.25, 43.65], [-4.0, 43.75], [-3.75, 43.65], [-3.5, 43.75], [-2.9700000000000273, 43.53], [-2.75, 43.0], [-2.9700000000000273, 42.47], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25], [-4.25, 42.35], [-4.319999999999993, 42.32], [-4.470000000000027, 41.97], [-5.0, 41.75], [-5.25, 41.85], [-5.319999999999993, 41.82], [-5.470000000000027, 41.47], [-5.819999999999993, 41.32], [-5.970000000000027, 40.97], [-6.319999999999993, 40.82], [-6.350000000000023, 40.75], [-6.25, 40.5], [-6.470000000000027, 39.97], [-6.819999999999993, 39.82], [-6.970000000000027, 39.47], [-7.5, 39.25], [-7.75, 39.35], [-8.0, 39.25], [-8.25, 39.35], [-8.5, 39.25], [-9.029999999999973, 39.47], [-9.25, 40.0], [-9.029999999999973, 40.53], [-8.680000000000007, 40.68], [-8.649999999999977, 40.75], [-8.75, 41.0], [-8.649999999999977, 41.25], [-8.680000000000007, 41.32], [-9.029999999999973, 41.47], [-9.25, 42.0], [-9.120000000000005, 42.3], [-9.529999999999973, 42.47]]]]}, "2025-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.529999999999973, 42.47], [-9.75, 43.0], [-9.529999999999973, 43.53], [-9.0, 43.75], [-8.75, 43.65], [-8.680000000000007, 43.68], [-8.529999999999973, 44.03], [-8.0, 44.25], [-7.75, 44.15], [-7.5, 44.25], [-7.25, 44.15], [-7.0, 44.25], [-6.470000000000027, 44.03], [-6.319999999999993, 43.68], [-6.25, 43.65], [-6.0, 43.75], [-5.75, 43.65], [-5.5, 43.75], [-5.25, 43.65], [-5.0, 43.75], [-4.75, 43.65], [-4.5, 43.75], [-4.25, 43.65], [-4.0, 43.75], [-3.75, 43.65], [-3.5, 43.75], [-2.9700000000000273, 43.53], [-2.75, 43.0], [-2.9700000000000273, 42.47], [-3.5, 42.25], [-3.75, 42.35], [-4.0, 42.25], [-4.25, 42.35], [-4.319999999999993, 42.32], [-4.470000000000027, 41.97], [-5.0, 41.75], [-5.25, 41.85], [-5.319999999999993, 41.82], [-5.470000000000027, 41.47], [-5.819999999999993, 41.32], [-5.970000000000027, 40.97], [-6.319999999999993, 40.82], [-6.350000000000023, 40.75], [-6.25, 40.5], [-6.470000000000027, 39.97], [-6.819999999999993, 39.82], [-6.970000000000027, 39.47], [-7.5, 39.25], [-7.75, 39.35], [-8.0, 39.25], [-8.25, 39.35], [-8.5, 39.25], [-9.029999999999973, 39.47], [-9.25, 40.0], [-9.029999999999973, 40.53], [-8.680000000000007, 40.68], [-8.649999999999977, 40.75], [-8.75, 41.0], [-8.649999999999977, 41.25], [-8.680000000000007, 41.32], [-9.029999999999973, 41.47], [-9.25, 42.0], [-9.120000000000005, 42.3], [-9.529999999999973, 42.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.547300729431868}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.047712073932325}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.342501739762781, 3.749867065951321, 3.4578585763263163]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.3437942504882585, -1.2300654093424441, -1.206358337402321]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7000372222391205, -4.155987263653335, -4.287111735904519]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.7211458356104, -5.547300729431868, -5.530650288927859]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4661655605345143, -1.651224381386752, -1.7013578633375965]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.747274581375065, -1.9297158070773295, -2.1357019117886025]}}