{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:43.465761", "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": "2023-Apr-09_to_2023-Apr-13_256.5_45.5"}, "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": 2023040001745}, "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": "April 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 13 2023"}, "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": 73771.21162080462}, "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": []}, "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": 45.5}, "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": 256.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "256.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 254.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 258.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-102.87, 44.3], [-102.75, 44.0], [-102.97, 43.47], [-103.5, 43.25], [-103.75, 43.35], [-104.0, 43.25], [-104.25, 43.35], [-104.5, 43.25], [-104.75, 43.35], [-105.0, 43.25], [-105.53, 43.47], [-105.68, 43.82], [-105.75, 43.85], [-106.0, 43.75], [-106.53, 43.97], [-106.75, 44.5], [-106.53, 45.03], [-106.18, 45.18], [-106.15, 45.25], [-106.25, 45.5], [-106.03, 46.03], [-105.5, 46.25], [-105.25, 46.15], [-105.18, 46.18], [-105.15, 46.25], [-105.25, 46.5], [-105.03, 47.03], [-104.5, 47.25], [-104.25, 47.15], [-104.18, 47.18], [-104.03, 47.53], [-103.5, 47.75], [-102.97, 47.53], [-102.82, 47.18], [-102.75, 47.15], [-102.5, 47.25], [-101.97, 47.03], [-101.82, 46.68], [-101.47, 46.53], [-101.25, 46.0], [-101.35, 45.75], [-101.25, 45.5], [-101.47, 44.97], [-101.82, 44.82], [-101.97, 44.47], [-102.5, 44.25], [-102.75, 44.35], [-102.87, 44.3]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.0, 44.75], [-104.53, 44.97], [-104.75, 45.5], [-104.53, 46.03], [-104.0, 46.25], [-103.75, 46.15], [-103.5, 46.25], [-102.97000000000003, 46.03], [-102.82, 45.68], [-102.47000000000003, 45.53], [-102.25, 45.0], [-102.47000000000003, 44.47], [-103.0, 44.25], [-103.52999999999997, 44.47], [-103.68, 44.82], [-103.75, 44.85], [-104.0, 44.75]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.15, 45.25], [-106.25, 45.5], [-106.03, 46.03], [-105.5, 46.25], [-105.25, 46.15], [-105.18, 46.18], [-105.15, 46.25], [-105.25, 46.5], [-105.03, 47.03], [-104.5, 47.25], [-104.25, 47.15], [-104.18, 47.18], [-104.03, 47.53], [-103.5, 47.75], [-102.97000000000003, 47.53], [-102.82, 47.18], [-102.75, 47.15], [-102.5, 47.25], [-101.97000000000003, 47.03], [-101.82, 46.68], [-101.47000000000003, 46.53], [-101.25, 46.0], [-101.35000000000002, 45.75], [-101.25, 45.5], [-101.47000000000003, 44.97], [-101.82, 44.82], [-101.97000000000003, 44.47], [-102.5, 44.25], [-102.75, 44.35], [-102.87, 44.3], [-102.75, 44.0], [-102.97000000000003, 43.47], [-103.5, 43.25], [-104.03, 43.47], [-104.19999999999999, 43.88], [-104.5, 43.75], [-105.0, 43.96], [-105.5, 43.75], [-105.75, 43.85], [-106.0, 43.75], [-106.53, 43.97], [-106.75, 44.5], [-106.53, 45.03], [-106.18, 45.18], [-106.15, 45.25]]]]}, "2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.15, 45.25], [-106.25, 45.5], [-106.03, 46.03], [-105.5, 46.25], [-105.25, 46.15], [-105.18, 46.18], [-105.15, 46.25], [-105.25, 46.5], [-105.03, 47.03], [-104.5, 47.25], [-104.25, 47.15], [-104.18, 47.18], [-104.03, 47.53], [-103.5, 47.75], [-102.97000000000003, 47.53], [-102.82, 47.18], [-102.75, 47.15], [-102.5, 47.25], [-101.97000000000003, 47.03], [-101.82, 46.68], [-101.47000000000003, 46.53], [-101.25, 46.0], [-101.35000000000002, 45.75], [-101.25, 45.5], [-101.47000000000003, 44.97], 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14.05320089985986}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 9.99609840949685}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.176163100035978, 13.304757498652975, 17.280171216412555, 14.891455488187773, 13.257513872067364]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.79647246417204, 14.476159521191391, 19.568088805501873, 18.26246024015319, 15.259816854027292]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.1933175576943045, 8.372482209118262, 12.195319540604201, 9.6376916232697, 8.713684089902396]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.207517907854083, 9.36669455646063, 14.05320089985986, 12.423861556294355, 9.570988120579784]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2487395886965489, 1.4717784289644964, 2.117034820613184, 1.6675024896840753, 1.500802500302037]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.2603291176125717, 1.6278882032091324, 2.363113390002189, 2.092991342522525, 1.5797386935360318]}}