{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:55.082713", "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-20_to_2023-Apr-23_285.5_38.5"}, "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": 2023040002432}, "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 20 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2023"}, "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": "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": 104538.53047364324}, "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": 38.5}, "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": 285.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "285.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.0}, "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": 33.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-77.0, 35.25], [-76.75, 35.15], [-76.68, 35.18], [-76.54, 35.5], [-76.75, 36.0], [-76.54, 36.5], [-76.75, 37.0], [-76.65, 37.25], [-76.75, 37.5], [-76.65, 37.75], [-76.75, 38.0], [-76.53, 38.53], [-76.0, 38.75], [-75.5, 38.54], [-75.18, 38.68], [-75.15, 38.75], [-75.25, 39.0], [-75.03, 39.53], [-74.5, 39.75], [-74.25, 39.65], [-74.0, 39.75], [-73.47, 39.53], [-73.25, 39.0], [-73.35, 38.75], [-73.25, 38.5], [-73.35, 38.25], [-73.25, 38.0], [-73.37, 37.7], [-73.25, 37.65], [-73.0, 37.75], [-72.75, 37.65], [-72.5, 37.75], [-71.97, 37.53], [-71.75, 37.0], [-71.97, 36.47], [-72.32, 36.32], [-72.47, 35.97], [-72.82, 35.82], [-72.97, 35.47], [-73.32, 35.32], [-73.47, 34.97], [-73.82, 34.82], [-73.97, 34.47], [-74.5, 34.25], [-74.75, 34.35], [-75.0, 34.25], [-75.25, 34.35], [-75.32, 34.32], [-75.47, 33.97], [-76.0, 33.75], [-76.25, 33.85], [-76.32, 33.82], [-76.47, 33.47], [-77.0, 33.25], [-77.25, 33.35], [-77.32, 33.32], [-77.47, 32.97], [-78.0, 32.75], [-78.53, 32.97], [-78.75, 33.5], [-78.53, 34.03], [-78.18, 34.18], [-78.03, 34.53], [-77.68, 34.68], [-77.53, 35.03], [-77.0, 35.25]]]]}}, "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": {"2023-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.02999999999997, 34.53], [-77.68, 34.68], [-77.52999999999997, 35.03], [-77.0, 35.25], [-76.75, 35.15], [-76.68, 35.18], [-76.54000000000002, 35.5], [-76.75, 36.0], [-76.54000000000002, 36.5], [-76.75, 37.0], [-76.64999999999998, 37.25], [-76.75, 37.5], [-76.64999999999998, 37.75], [-76.75, 38.0], [-76.52999999999997, 38.53], [-76.0, 38.75], [-75.47000000000003, 38.53], [-75.25, 38.0], [-75.35000000000002, 37.75], [-75.32, 37.68], [-74.97000000000003, 37.53], [-74.82, 37.18], [-74.75, 37.15], [-74.5, 37.25], [-74.25, 37.15], [-74.18, 37.18], [-74.02999999999997, 37.53], [-73.5, 37.75], [-73.25, 37.65], [-73.0, 37.75], [-72.75, 37.65], [-72.5, 37.75], [-71.97000000000003, 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anomalies.", "value": [4.04101655499407, 4.433480033202549, 4.273336369650998, 3.2109934819761747]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.658712032295227, 6.542922564304661, 6.46146634464526, 3.7082068305115854]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5094203882240582, 1.7849733807483819, 1.8182056047120942, 1.8131449318583792]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9519762852811158, 2.4985956314245685, 2.569306528062694, 2.3325719410245203]}}