{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:37.081510", "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-Apr-28_to_2024-May-02_304.0_55.5"}, "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": 2024040002048}, "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 28 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2024"}, "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": 53781.67026417113}, "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": ["Canada"]}, "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": ["Labrador Sea"]}, "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": 55.5}, "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": 304.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-55.0, 54.25], [-55.25, 54.35], [-55.5, 54.25], [-55.75, 54.35], [-55.82, 54.32], [-55.97, 53.97], [-56.5, 53.75], [-57.03, 53.97], [-57.18, 54.32], [-57.53, 54.47], [-57.75, 55.0], [-57.65, 55.25], [-57.68, 55.32], [-58.03, 55.47], [-58.25, 56.0], [-58.03, 56.53], [-57.5, 56.75], [-57.25, 56.65], [-57.0, 56.75], [-56.75, 56.65], [-56.68, 56.68], [-56.53, 57.03], [-56.0, 57.25], [-55.75, 57.15], [-55.5, 57.25], [-55.25, 57.15], [-55.0, 57.25], [-54.75, 57.15], [-54.5, 57.25], [-54.25, 57.15], [-54.18, 57.18], [-54.03, 57.53], [-53.5, 57.75], [-53.25, 57.65], [-53.0, 57.75], [-52.47, 57.53], [-52.25, 57.0], [-52.35, 56.75], [-52.25, 56.5], [-52.47, 55.97], [-52.82, 55.82], [-52.85, 55.75], [-52.75, 55.5], [-52.97, 54.97], [-53.5, 54.75], [-54.0, 54.96], [-54.11, 54.91], [-54.32, 54.82], [-54.47, 54.47], [-55.0, 54.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.02999999999997, 55.47], [-58.25, 56.0], [-58.02999999999997, 56.53], [-57.5, 56.75], [-57.25, 56.65], [-57.0, 56.75], [-56.75, 56.65], [-56.68000000000001, 56.68], [-56.52999999999997, 57.03], [-56.0, 57.25], [-55.75, 57.15], [-55.5, 57.25], [-55.25, 57.15], [-55.0, 57.25], [-54.75, 57.15], [-54.5, 57.25], [-54.25, 57.15], [-54.18000000000001, 57.18], [-54.02999999999997, 57.53], [-53.5, 57.75], [-53.25, 57.65], [-53.0, 57.75], [-52.47000000000003, 57.53], [-52.25, 57.0], [-52.35000000000002, 56.75], [-52.25, 56.5], [-52.47000000000003, 55.97], [-52.81999999999999, 55.82], [-52.97000000000003, 55.47], [-53.5, 55.25], [-53.75, 55.35], [-53.81999999999999, 55.32], [-53.97000000000003, 54.97], [-54.5, 54.75], [-54.75, 54.85], [-54.81999999999999, 54.82], [-54.97000000000003, 54.47], [-55.5, 54.25], [-55.75, 54.35], [-55.81999999999999, 54.32], [-55.97000000000003, 53.97], [-56.5, 53.75], [-57.02999999999997, 53.97], [-57.18000000000001, 54.32], [-57.52999999999997, 54.47], [-57.75, 55.0], [-57.64999999999998, 55.25], [-57.68000000000001, 55.32], [-58.02999999999997, 55.47]]]]}, "2024-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.02999999999997, 55.47], [-58.25, 56.0], [-58.02999999999997, 56.53], [-57.5, 56.75], [-57.25, 56.65], [-57.0, 56.75], [-56.75, 56.65], [-56.68000000000001, 56.68], [-56.52999999999997, 57.03], [-56.0, 57.25], [-55.75, 57.15], [-55.5, 57.25], [-55.25, 57.15], [-55.0, 57.25], [-54.75, 57.15], [-54.5, 57.25], [-54.25, 57.15], [-54.18000000000001, 57.18], [-54.02999999999997, 57.53], [-53.5, 57.75], [-53.25, 57.65], [-53.0, 57.75], [-52.47000000000003, 57.53], [-52.25, 57.0], [-52.35000000000002, 56.75], [-52.25, 56.5], [-52.47000000000003, 55.97], [-52.81999999999999, 55.82], [-52.85000000000002, 55.75], [-52.75, 55.5], [-52.97000000000003, 54.97], [-53.5, 54.75], [-54.0, 54.96], [-54.5, 54.75], [-54.75, 54.85], [-54.81999999999999, 54.82], [-54.97000000000003, 54.47], [-55.5, 54.25], [-55.75, 54.35], [-55.81999999999999, 54.32], [-55.97000000000003, 53.97], [-56.5, 53.75], [-57.02999999999997, 53.97], [-57.18000000000001, 54.32], [-57.52999999999997, 54.47], [-57.75, 55.0], [-57.64999999999998, 55.25], [-57.68000000000001, 55.32], [-58.02999999999997, 55.47]]]]}, "2024-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.02999999999997, 55.47], [-58.25, 56.0], [-58.02999999999997, 56.53], [-57.5, 56.75], [-57.25, 56.65], [-57.0, 56.75], [-56.75, 56.65], [-56.68000000000001, 56.68], [-56.52999999999997, 57.03], [-56.0, 57.25], [-55.75, 57.15], [-55.5, 57.25], [-55.25, 57.15], [-55.0, 57.25], [-54.75, 57.15], [-54.5, 57.25], [-54.25, 57.15], [-54.18000000000001, 57.18], [-54.02999999999997, 57.53], [-53.5, 57.75], [-53.25, 57.65], [-53.0, 57.75], [-52.47000000000003, 57.53], [-52.25, 57.0], [-52.35000000000002, 56.75], [-52.25, 56.5], [-52.47000000000003, 55.97], [-52.81999999999999, 55.82], [-52.85000000000002, 55.75], [-52.75, 55.5], [-52.97000000000003, 54.97], [-53.5, 54.75], [-54.0, 54.96], [-54.31999999999999, 54.82], [-54.47000000000003, 54.47], [-55.0, 54.25], [-55.25, 54.35], [-55.5, 54.25], [-55.75, 54.35], [-55.81999999999999, 54.32], [-55.97000000000003, 53.97], [-56.5, 53.75], [-57.02999999999997, 53.97], [-57.18000000000001, 54.32], [-57.52999999999997, 54.47], [-57.75, 55.0], [-57.64999999999998, 55.25], [-57.68000000000001, 55.32], [-58.02999999999997, 55.47]]]]}, "2024-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.02999999999997, 55.47], [-58.25, 56.0], [-58.02999999999997, 56.53], [-57.5, 56.75], [-57.25, 56.65], [-57.0, 56.75], [-56.75, 56.65], [-56.5, 56.75], [-56.25, 56.65], [-56.0, 56.75], [-55.75, 56.65], [-55.5, 56.75], [-55.0, 56.54], [-54.5, 56.75], [-53.97000000000003, 56.53], [-53.80000000000001, 56.12], [-53.5, 56.25], [-52.97000000000003, 56.03], [-52.75, 55.5], [-52.97000000000003, 54.97], [-53.5, 54.75], [-54.0, 54.96], [-54.31999999999999, 54.82], [-54.47000000000003, 54.47], [-55.0, 54.25], [-55.25, 54.35], [-55.5, 54.25], [-55.75, 54.35], [-55.81999999999999, 54.32], [-55.97000000000003, 53.97], [-56.5, 53.75], [-57.02999999999997, 53.97], [-57.18000000000001, 54.32], [-57.52999999999997, 54.47], [-57.75, 55.0], [-57.64999999999998, 55.25], [-57.68000000000001, 55.32], [-58.02999999999997, 55.47]]]]}, "2024-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, 54.97], [-57.25, 55.5], [-57.02999999999997, 56.03], [-56.5, 56.25], [-56.25, 56.15], [-56.0, 56.25], [-55.75, 56.15], [-55.5, 56.25], [-55.25, 56.15], [-55.0, 56.25], [-54.47000000000003, 56.03], [-54.25, 55.5], [-54.35000000000002, 55.25], [-54.25, 55.0], [-54.47000000000003, 54.47], [-55.0, 54.25], [-55.25, 54.35], [-55.5, 54.25], [-55.75, 54.35], [-56.0, 54.25], [-56.52999999999997, 54.47], [-56.68000000000001, 54.82], [-57.02999999999997, 54.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.591647372933096}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.7324319449163017}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.35343076943343, 2.8735561007908927, 2.931307294655369, 2.2941355606723164, 1.900896982122788]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.097521994822728, 3.9208481542099776, 3.9541425530005085, 3.085335874933662, 2.469081398904393]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.2337038593288687, 2.6628348038791976, 2.6500049373980783, 2.4670862690924915, 2.0392653430400207]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.591647372933096, 3.483663155055865, 3.512147827730246, 3.0021853583015172, 2.3148702453671035]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.558900003005249, 1.3098133883508634, 1.3917354701345936, 1.304839918258561, 1.1962985149154959]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.000426743209498, 1.5825974901170954, 1.8710773299026173, 1.6450529077657428, 1.3459029012675294]}}