{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:30.345507", "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-Dec-29_to_2025-Jan-01_355.5_41.5"}, "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": 2024120000705}, "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": "December 29 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2025"}, "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": 57695.45988697812}, "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": 41.5}, "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": 355.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.0}, "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": 41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-4.47, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.03, 40.47], [-8.18, 40.82], [-8.53, 40.97], [-8.75, 41.5], [-8.53, 42.03], [-8.18, 42.18], [-8.03, 42.53], [-7.5, 42.75], [-6.97, 42.53], [-6.82, 42.18], [-6.75, 42.15], [-6.68, 42.18], [-6.65, 42.25], [-6.75, 42.5], [-6.53, 43.03], [-6.0, 43.25], [-5.75, 43.15], [-5.5, 43.25], [-5.25, 43.15], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-4.0, 43.04], [-3.5, 43.25], [-2.97, 43.03], [-2.75, 42.5], [-2.97, 41.97], [-3.32, 41.82], [-3.35, 41.75], [-3.25, 41.5], [-3.47, 40.97], [-4.0, 40.75], [-4.25, 40.85], [-4.32, 40.82], [-4.47, 40.47]]]]}}, "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": {"2024-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.029999999999973, 42.03], [-4.5, 42.25], [-3.9700000000000273, 42.03], [-3.75, 41.5], [-3.9700000000000273, 40.97], [-4.5, 40.75], [-5.029999999999973, 40.97], [-5.25, 41.5], [-5.029999999999973, 42.03]]]]}, "2024-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.529999999999973, 40.97], [-8.75, 41.5], [-8.529999999999973, 42.03], [-8.180000000000007, 42.18], [-8.029999999999973, 42.53], [-7.5, 42.75], [-6.970000000000027, 42.53], [-6.819999999999993, 42.18], [-6.75, 42.15], [-6.680000000000007, 42.18], [-6.649999999999977, 42.25], [-6.75, 42.5], [-6.529999999999973, 43.03], [-6.0, 43.25], [-5.75, 43.15], [-5.5, 43.25], [-5.25, 43.15], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-4.0, 43.04], [-3.5, 43.25], [-2.9700000000000273, 43.03], [-2.75, 42.5], [-2.9700000000000273, 41.97], [-3.319999999999993, 41.82], [-3.3500000000000227, 41.75], [-3.25, 41.5], [-3.4700000000000273, 40.97], [-4.0, 40.75], [-4.25, 40.85], [-4.319999999999993, 40.82], [-4.470000000000027, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.029999999999973, 40.47], [-8.180000000000007, 40.82], [-8.529999999999973, 40.97]]]]}, "2024-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.529999999999973, 40.97], [-8.75, 41.5], [-8.529999999999973, 42.03], [-8.180000000000007, 42.18], [-8.029999999999973, 42.53], [-7.5, 42.75], [-6.970000000000027, 42.53], [-6.819999999999993, 42.18], [-6.75, 42.15], [-6.680000000000007, 42.18], [-6.649999999999977, 42.25], [-6.75, 42.5], [-6.529999999999973, 43.03], [-6.0, 43.25], [-5.75, 43.15], [-5.5, 43.25], [-5.25, 43.15], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-4.0, 43.04], [-3.5, 43.25], [-2.9700000000000273, 43.03], [-2.75, 42.5], [-2.9700000000000273, 41.97], [-3.319999999999993, 41.82], [-3.3500000000000227, 41.75], [-3.25, 41.5], [-3.4700000000000273, 40.97], [-4.0, 40.75], [-4.25, 40.85], [-4.319999999999993, 40.82], [-4.470000000000027, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.029999999999973, 40.47], [-8.180000000000007, 40.82], [-8.529999999999973, 40.97]]]]}, "2025-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.529999999999973, 40.97], [-8.75, 41.5], [-8.529999999999973, 42.03], [-8.180000000000007, 42.18], [-8.029999999999973, 42.53], [-7.5, 42.75], [-6.970000000000027, 42.53], [-6.819999999999993, 42.18], [-6.75, 42.15], [-6.680000000000007, 42.18], [-6.649999999999977, 42.25], [-6.75, 42.5], [-6.529999999999973, 43.03], [-6.0, 43.25], [-5.75, 43.15], [-5.5, 43.25], [-5.25, 43.15], [-5.0, 43.25], [-4.75, 43.15], [-4.5, 43.25], [-4.0, 43.04], [-3.5, 43.25], [-2.9700000000000273, 43.03], [-2.75, 42.5], [-2.9700000000000273, 41.97], [-3.319999999999993, 41.82], [-3.3500000000000227, 41.75], [-3.25, 41.5], [-3.4700000000000273, 40.97], [-4.0, 40.75], [-4.25, 40.85], [-4.319999999999993, 40.82], [-4.470000000000027, 40.47], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.25, 40.35], [-6.5, 40.25], [-6.75, 40.35], [-7.0, 40.25], [-7.25, 40.35], [-7.5, 40.25], [-8.029999999999973, 40.47], [-8.180000000000007, 40.82], [-8.529999999999973, 40.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.918250151918869}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.056802104483414}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.5144198099772552, 0.4316120910644372, 0.11604548136398307, -0.25484746297195215]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.5144198099772552, -0.7675448099772098, -1.091727956136026, -1.7352673848469635]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9685797419782602, -4.647434384012756, -5.091200765126564, -5.475300058811128]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.9685797419782602, -5.999095717384762, -5.853384877153303, -6.918250151918869]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2894070122792278, -1.5867097566165211, -1.6796469106382261, -1.8002505268637348]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2894070122792278, -1.8669469475407616, -1.8804823757247706, -2.113545657539587]}}