{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:48.708037", "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-28_to_2025-Jan-01_286.5_40.0"}, "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": 2024120002291}, "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 28 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": 5}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 60784.140218020155}, "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": ["United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": ["Atlantic Ocean"]}, "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": 40.0}, "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": 286.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 287.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.68, 39.18], [-74.53, 39.53], [-74.18, 39.68], [-74.15, 39.75], [-74.25, 40.0], [-74.03, 40.53], [-73.5, 40.75], [-73.25, 40.65], [-73.0, 40.75], [-72.75, 40.65], [-72.5, 40.75], [-71.97, 40.53], [-71.75, 40.0], [-71.97, 39.47], [-72.32, 39.32], [-72.47, 38.97], [-72.82, 38.82], [-72.85, 38.75], [-72.75, 38.5], [-72.97, 37.97], [-73.32, 37.82], [-73.35, 37.75], [-73.25, 37.5], [-73.47, 36.97], [-73.82, 36.82], [-73.85, 36.75], [-73.75, 36.5], [-73.97, 35.97], [-74.5, 35.75], [-74.75, 35.85], [-75.0, 35.75], [-75.25, 35.85], [-75.5, 35.75], [-76.03, 35.97], [-76.25, 36.5], [-76.15, 36.75], [-76.18, 36.82], [-76.53, 36.97], [-76.75, 37.5], [-76.65, 37.75], [-76.75, 38.0], [-76.65, 38.25], [-76.75, 38.5], [-76.53, 39.03], [-76.0, 39.25], [-75.47, 39.03], [-75.25, 38.5], [-75.03, 39.03], [-74.68, 39.18]], [[-75.35, 38.25], [-75.32, 38.18], [-75.25, 38.15], [-75.18, 38.18], [-75.15, 38.25], [-75.25, 38.5], [-75.35, 38.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.25, 37.0], [-76.02999999999997, 37.53], [-75.68, 37.68], [-75.52999999999997, 38.03], [-75.18, 38.18], [-75.14999999999998, 38.25], [-75.25, 38.5], [-75.02999999999997, 39.03], [-74.68, 39.18], [-74.52999999999997, 39.53], [-74.18, 39.68], [-74.14999999999998, 39.75], [-74.25, 40.0], [-74.02999999999997, 40.53], [-73.5, 40.75], [-72.97000000000003, 40.53], [-72.75, 40.0], [-72.85000000000002, 39.75], [-72.75, 39.5], [-72.85000000000002, 39.25], [-72.75, 39.0], [-72.97000000000003, 38.47], [-73.32, 38.32], [-73.35000000000002, 38.25], [-73.25, 38.0], [-73.35000000000002, 37.75], [-73.25, 37.5], [-73.47000000000003, 36.97], [-73.82, 36.82], [-73.85000000000002, 36.75], [-73.75, 36.5], [-73.97000000000003, 35.97], [-74.5, 35.75], [-74.75, 35.85], [-75.0, 35.75], [-75.25, 35.85], [-75.5, 35.75], [-76.02999999999997, 35.97], 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"coordinates": [[[[-73.5, 39.25], [-74.02999999999997, 39.47], [-74.25, 40.0], [-74.02999999999997, 40.53], [-73.5, 40.75], [-73.25, 40.65], [-73.0, 40.75], [-72.47000000000003, 40.53], [-72.25, 40.0], [-72.47000000000003, 39.47], [-73.0, 39.25], [-73.25, 39.35], [-73.5, 39.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.962077148298306}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.454024242309918}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.998256189682934, 13.451050669352185, 13.060811309814483, 11.586440446641689, 10.07243118286135]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.320876057942712, 17.99863204956057, 16.48033930460616, 15.759020741780603, 10.347414906819665]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [5.239754833386174, 6.268302149553761, 5.806300630988674, 4.422619007085994, 5.070248341816381]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [6.653318908777919, 7.617047463955998, 7.962077148298306, 5.207319697634887, 5.0922888534857975]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3611639463436633, 1.6027374802081857, 1.4893197606670554, 1.1309358316920237, 1.2664257675396238]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6708954810888528, 1.8194143274280177, 1.8982767488884795, 1.320890575972868, 1.266681785994657]}}