{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:47.191232", "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-12_to_2023-Apr-16_299.5_61.0"}, "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": 2023040001909}, "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 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 16 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": 206774.43535944822}, "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": 61.0}, "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": 299.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "299.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.5}, "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": 55.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-52.97, 54.47], [-53.5, 54.25], [-53.75, 54.35], [-54.0, 54.25], [-54.53, 54.47], [-54.68, 54.82], [-54.75, 54.85], [-55.0, 54.75], [-55.25, 54.85], [-55.5, 54.75], [-56.03, 54.97], [-56.18, 55.32], [-56.25, 55.35], [-56.5, 55.25], [-56.75, 55.35], [-57.0, 55.25], [-57.53, 55.47], [-57.68, 55.82], [-58.03, 55.97], [-58.18, 56.32], [-58.25, 56.35], [-58.5, 56.25], [-59.03, 56.47], [-59.18, 56.82], [-59.53, 56.97], [-59.68, 57.32], [-60.03, 57.47], [-60.25, 58.0], [-60.15, 58.25], [-60.18, 58.32], [-60.53, 58.47], [-60.68, 58.82], [-61.03, 58.97], [-61.18, 59.32], [-61.53, 59.47], [-61.68, 59.82], [-62.03, 59.97], [-62.25, 60.5], [-62.15, 60.75], [-62.25, 61.0], [-62.03, 61.53], [-61.5, 61.75], [-61.25, 61.65], [-61.18, 61.68], [-61.03, 62.03], [-60.68, 62.18], [-60.53, 62.53], [-60.18, 62.68], [-60.03, 63.03], [-59.5, 63.25], [-58.97, 63.03], [-58.75, 62.5], [-58.87, 62.2], [-58.47, 62.03], [-58.32, 61.68], [-58.25, 61.65], [-58.0, 61.75], [-57.47, 61.53], [-57.32, 61.18], [-57.25, 61.15], [-57.0, 61.25], [-56.47, 61.03], [-56.32, 60.68], [-56.25, 60.65], [-56.0, 60.75], [-55.47, 60.53], [-55.25, 60.0], [-55.35, 59.75], [-55.32, 59.68], [-55.25, 59.65], [-55.0, 59.75], [-54.47, 59.53], [-54.32, 59.18], [-54.25, 59.15], [-54.0, 59.25], [-53.47, 59.03], [-53.32, 58.68], [-52.97, 58.53], [-52.75, 58.0], [-52.87, 57.7], [-52.47, 57.53], [-52.25, 57.0], [-52.35, 56.75], [-52.25, 56.5], [-52.47, 55.97], [-52.82, 55.82], [-52.96, 55.5], [-52.75, 55.0], [-52.97, 54.47]]]]}}, "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": {"2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 61.0], [-62.02999999999997, 61.53], [-61.5, 61.75], [-61.25, 61.65], [-61.18000000000001, 61.68], [-61.02999999999997, 62.03], [-60.68000000000001, 62.18], [-60.52999999999997, 62.53], [-60.18000000000001, 62.68], [-60.02999999999997, 63.03], [-59.5, 63.25], [-58.97000000000003, 63.03], [-58.75, 62.5], [-58.95999999999998, 62.0], [-58.81999999999999, 61.68], [-58.75, 61.65], [-58.5, 61.75], [-57.97000000000003, 61.53], [-57.81999999999999, 61.18], [-57.75, 61.15], [-57.5, 61.25], [-57.25, 61.15], [-57.0, 61.25], [-56.47000000000003, 61.03], [-56.31999999999999, 60.68], [-56.25, 60.65], [-56.0, 60.75], [-55.47000000000003, 60.53], [-55.25, 60.0], [-55.35000000000002, 59.75], [-55.31999999999999, 59.68], [-55.25, 59.65], [-55.0, 59.75], [-54.47000000000003, 59.53], [-54.31999999999999, 59.18], [-54.25, 59.15], [-54.0, 59.25], [-53.47000000000003, 59.03], [-53.31999999999999, 58.68], [-52.97000000000003, 58.53], [-52.75, 58.0], [-52.97000000000003, 57.47], [-53.5, 57.25], [-53.75, 57.35], [-54.0, 57.25], [-54.25, 57.35], [-54.31999999999999, 57.32], [-54.35000000000002, 57.25], [-54.25, 57.0], [-54.35000000000002, 56.75], [-54.31999999999999, 56.68], [-53.97000000000003, 56.53], [-53.81999999999999, 56.18], [-53.47000000000003, 56.03], [-53.25, 55.5], [-53.47000000000003, 54.97], [-54.0, 54.75], [-54.25, 54.85], [-54.5, 54.75], [-54.75, 54.85], [-55.0, 54.75], [-55.25, 54.85], [-55.5, 54.75], [-56.02999999999997, 54.97], [-56.18000000000001, 55.32], [-56.25, 55.35], [-56.5, 55.25], [-56.75, 55.35], [-57.0, 55.25], [-57.52999999999997, 55.47], [-57.68000000000001, 55.82], [-58.02999999999997, 55.97], [-58.18000000000001, 56.32], [-58.25, 56.35], [-58.5, 56.25], [-59.02999999999997, 56.47], [-59.18000000000001, 56.82], [-59.52999999999997, 56.97], [-59.68000000000001, 57.32], [-60.02999999999997, 57.47], [-60.25, 58.0], [-60.14999999999998, 58.25], [-60.18000000000001, 58.32], [-60.52999999999997, 58.47], [-60.68000000000001, 58.82], [-61.02999999999997, 58.97], [-61.18000000000001, 59.32], [-61.52999999999997, 59.47], [-61.68000000000001, 59.82], [-62.02999999999997, 59.97], [-62.25, 60.5], [-62.14999999999998, 60.75], [-62.25, 61.0]]]]}, "2023-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 61.0], [-62.02999999999997, 61.53], [-61.5, 61.75], [-61.25, 61.65], [-61.18000000000001, 61.68], [-61.02999999999997, 62.03], [-60.68000000000001, 62.18], [-60.52999999999997, 62.53], [-60.18000000000001, 62.68], [-60.02999999999997, 63.03], [-59.5, 63.25], [-58.97000000000003, 63.03], [-58.75, 62.5], [-58.870000000000005, 62.2], [-58.47000000000003, 62.03], [-58.31999999999999, 61.68], [-58.25, 61.65], [-58.0, 61.75], [-57.47000000000003, 61.53], [-57.31999999999999, 61.18], [-57.25, 61.15], [-57.0, 61.25], [-56.47000000000003, 61.03], [-56.31999999999999, 60.68], [-56.25, 60.65], [-56.0, 60.75], [-55.47000000000003, 60.53], [-55.25, 60.0], [-55.35000000000002, 59.75], [-55.31999999999999, 59.68], [-55.25, 59.65], [-55.0, 59.75], [-54.47000000000003, 59.53], [-54.31999999999999, 59.18], [-54.25, 59.15], [-54.0, 59.25], [-53.47000000000003, 59.03], [-53.31999999999999, 58.68], [-52.97000000000003, 58.53], [-52.75, 58.0], [-52.870000000000005, 57.7], [-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], [-53.31999999999999, 55.32], [-53.47000000000003, 54.97], [-54.0, 54.75], [-54.25, 54.85], [-54.5, 54.75], [-54.75, 54.85], [-55.0, 54.75], [-55.25, 54.85], [-55.5, 54.75], [-56.02999999999997, 54.97], [-56.18000000000001, 55.32], [-56.25, 55.35], [-56.5, 55.25], [-56.75, 55.35], [-57.0, 55.25], [-57.52999999999997, 55.47], [-57.68000000000001, 55.82], [-58.02999999999997, 55.97], [-58.18000000000001, 56.32], [-58.25, 56.35], [-58.5, 56.25], [-59.02999999999997, 56.47], [-59.18000000000001, 56.82], [-59.52999999999997, 56.97], [-59.68000000000001, 57.32], [-60.02999999999997, 57.47], [-60.25, 58.0], [-60.14999999999998, 58.25], [-60.18000000000001, 58.32], [-60.52999999999997, 58.47], [-60.68000000000001, 58.82], [-61.02999999999997, 58.97], [-61.18000000000001, 59.32], [-61.52999999999997, 59.47], [-61.68000000000001, 59.82], [-62.02999999999997, 59.97], [-62.25, 60.5], [-62.14999999999998, 60.75], [-62.25, 61.0]]]]}, "2023-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 61.0], [-62.02999999999997, 61.53], [-61.5, 61.75], [-61.25, 61.65], [-61.18000000000001, 61.68], [-61.02999999999997, 62.03], [-60.68000000000001, 62.18], [-60.52999999999997, 62.53], [-60.18000000000001, 62.68], [-60.02999999999997, 63.03], [-59.5, 63.25], [-58.97000000000003, 63.03], [-58.75, 62.5], [-58.870000000000005, 62.2], [-58.47000000000003, 62.03], [-58.31999999999999, 61.68], [-58.25, 61.65], [-58.0, 61.75], [-57.47000000000003, 61.53], [-57.31999999999999, 61.18], [-57.25, 61.15], [-57.0, 61.25], [-56.47000000000003, 61.03], [-56.31999999999999, 60.68], [-56.25, 60.65], [-56.0, 60.75], [-55.47000000000003, 60.53], [-55.25, 60.0], [-55.35000000000002, 59.75], [-55.31999999999999, 59.68], [-55.25, 59.65], [-55.0, 59.75], [-54.47000000000003, 59.53], [-54.31999999999999, 59.18], [-54.25, 59.15], [-54.0, 59.25], [-53.47000000000003, 59.03], [-53.31999999999999, 58.68], [-52.97000000000003, 58.53], [-52.75, 58.0], [-52.870000000000005, 57.7], [-52.47000000000003, 57.53], [-52.25, 57.0], [-52.35000000000002, 56.75], [-52.25, 56.5], [-52.47000000000003, 55.97], [-52.81999999999999, 55.82], [-52.95999999999998, 55.5], [-52.75, 55.0], [-52.97000000000003, 54.47], [-53.5, 54.25], [-53.75, 54.35], [-54.0, 54.25], [-54.52999999999997, 54.47], [-54.68000000000001, 54.82], [-54.75, 54.85], [-55.0, 54.75], [-55.25, 54.85], [-55.5, 54.75], [-56.02999999999997, 54.97], [-56.18000000000001, 55.32], [-56.25, 55.35], [-56.5, 55.25], [-56.75, 55.35], [-57.0, 55.25], [-57.52999999999997, 55.47], [-57.68000000000001, 55.82], [-58.02999999999997, 55.97], [-58.18000000000001, 56.32], [-58.25, 56.35], [-58.5, 56.25], [-59.02999999999997, 56.47], [-59.18000000000001, 56.82], [-59.52999999999997, 56.97], [-59.68000000000001, 57.32], [-60.02999999999997, 57.47], [-60.25, 58.0], [-60.14999999999998, 58.25], [-60.18000000000001, 58.32], [-60.52999999999997, 58.47], [-60.68000000000001, 58.82], [-61.02999999999997, 58.97], [-61.18000000000001, 59.32], [-61.52999999999997, 59.47], [-61.68000000000001, 59.82], [-62.02999999999997, 59.97], [-62.25, 60.5], [-62.14999999999998, 60.75], [-62.25, 61.0]]]]}, "2023-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.02999999999997, 60.47], [-61.25, 61.0], [-61.02999999999997, 61.53], [-60.68000000000001, 61.68], [-60.52999999999997, 62.03], [-60.0, 62.25], [-59.75, 62.15], [-59.5, 62.25], [-59.25, 62.15], [-59.0, 62.25], [-58.47000000000003, 62.03], [-58.31999999999999, 61.68], [-58.25, 61.65], [-58.0, 61.75], [-57.47000000000003, 61.53], [-57.31999999999999, 61.18], [-56.97000000000003, 61.03], [-56.81999999999999, 60.68], [-56.47000000000003, 60.53], [-56.25, 60.0], [-56.35000000000002, 59.75], [-56.31999999999999, 59.68], [-56.25, 59.65], [-56.0, 59.75], [-55.47000000000003, 59.53], [-55.31999999999999, 59.18], [-55.25, 59.15], [-55.0, 59.25], [-54.47000000000003, 59.03], [-54.31999999999999, 58.68], [-53.97000000000003, 58.53], [-53.81999999999999, 58.18], [-53.47000000000003, 58.03], [-53.31999999999999, 57.68], [-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], [-52.95999999999998, 55.5], [-52.75, 55.0], [-52.97000000000003, 54.47], [-53.5, 54.25], [-53.75, 54.35], [-54.0, 54.25], [-54.52999999999997, 54.47], [-54.68000000000001, 54.82], [-54.75, 54.85], [-55.0, 54.75], [-55.25, 54.85], [-55.5, 54.75], [-56.02999999999997, 54.97], [-56.18000000000001, 55.32], [-56.25, 55.35], [-56.5, 55.25], [-56.75, 55.35], [-57.0, 55.25], [-57.52999999999997, 55.47], [-57.68000000000001, 55.82], [-58.02999999999997, 55.97], [-58.18000000000001, 56.32], [-58.52999999999997, 56.47], [-58.75, 57.0], [-58.64999999999998, 57.25], [-58.75, 57.5], [-58.64999999999998, 57.75], [-58.75, 58.0], [-58.64999999999998, 58.25], [-58.68000000000001, 58.32], [-59.02999999999997, 58.47], [-59.18000000000001, 58.82], [-59.52999999999997, 58.97], [-59.68000000000001, 59.32], [-60.02999999999997, 59.47], [-60.18000000000001, 59.82], [-60.52999999999997, 59.97], [-60.68000000000001, 60.32], [-61.02999999999997, 60.47]]]]}, "2023-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.0, 54.75], [-55.52999999999997, 54.97], [-55.75, 55.5], [-55.52999999999997, 56.03], [-55.0, 56.25], [-54.75, 56.15], [-54.5, 56.25], [-53.97000000000003, 56.03], [-53.81999999999999, 55.68], [-53.75, 55.65], [-53.5, 55.75], [-52.97000000000003, 55.53], [-52.75, 55.0], [-52.97000000000003, 54.47], [-53.5, 54.25], [-53.75, 54.35], [-54.0, 54.25], [-54.52999999999997, 54.47], [-54.68000000000001, 54.82], [-54.75, 54.85], [-55.0, 54.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.251584984363944}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.7075623366818675}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.9828774027994882, 2.2337070241867423, 2.6720795778963407, 2.352984277080566, 1.7723279560520382]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.0106363158229783, 3.2360447150024925, 3.6902533309479963, 3.3869805976065095, 2.059968834429185]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.697378382915753, 4.676673110555426, 5.170088156716595, 4.209647218008553, 2.4924663738228503]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.465338283936774, 8.011660831498489, 9.251584984363944, 6.118182240339593, 2.5571352830193064]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4861206058831407, 1.5294521294257748, 1.6604696120174596, 1.4570276807412537, 1.1451514155458438]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.0009429576418687, 2.18804390838231, 2.3888401040360927, 1.8476358232404426, 1.1881851260428455]}}