{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:34.044776", "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": "2026-Apr-25_to_2026-Apr-28_309.0_3.5"}, "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": 2026040002603}, "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 25 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 2026"}, "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": 77138.69559085692}, "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": ["Brazil", "French Guiana"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Atlantic-Ocean", "N.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": ["North 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": 3.5}, "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": 309.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 4.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.75, 3.0], [-53.53, 3.53], [-53.0, 3.75], [-52.75, 3.65], [-52.5, 3.75], [-52.25, 3.65], [-52.0, 3.75], [-51.75, 3.65], [-51.68, 3.68], [-51.65, 3.75], [-51.75, 4.0], [-51.53, 4.53], [-51.0, 4.75], [-50.75, 4.65], [-50.68, 4.68], [-50.53, 5.03], [-50.0, 5.25], [-49.75, 5.15], [-49.5, 5.25], [-48.97, 5.03], [-48.82, 4.68], [-48.47, 4.53], [-48.32, 4.18], [-47.97, 4.03], [-47.75, 3.5], [-47.85, 3.25], [-47.75, 3.0], [-47.97, 2.47], [-48.5, 2.25], [-48.75, 2.35], [-49.0, 2.25], [-49.25, 2.35], [-49.5, 2.25], [-49.75, 2.35], [-50.0, 2.25], [-50.3, 2.38], [-50.47, 1.97], [-51.0, 1.75], [-51.5, 1.96], [-52.0, 1.75], [-52.25, 1.85], [-52.5, 1.75], [-53.03, 1.97], [-53.18, 2.32], [-53.53, 2.47], [-53.75, 3.0]]]]}, "2026-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.75, 3.0], [-53.53, 3.53], [-53.0, 3.75], [-52.75, 3.65], [-52.5, 3.75], [-52.25, 3.65], [-52.0, 3.75], [-51.75, 3.65], [-51.68, 3.68], [-51.65, 3.75], [-51.75, 4.0], [-51.53, 4.53], [-51.0, 4.75], [-50.75, 4.65], [-50.68, 4.68], [-50.53, 5.03], [-50.0, 5.25], [-49.75, 5.15], [-49.5, 5.25], [-48.97, 5.03], [-48.82, 4.68], [-48.47, 4.53], [-48.32, 4.18], [-47.97, 4.03], [-47.75, 3.5], [-47.85, 3.25], [-47.75, 3.0], [-47.97, 2.47], [-48.5, 2.25], [-48.75, 2.35], [-49.0, 2.25], [-49.25, 2.35], [-49.5, 2.25], [-49.75, 2.35], [-50.0, 2.25], [-50.3, 2.38], [-50.47, 1.97], [-51.0, 1.75], [-51.5, 1.96], [-52.0, 1.75], [-52.25, 1.85], [-52.5, 1.75], [-53.03, 1.97], [-53.18, 2.32], [-53.53, 2.47], [-53.75, 3.0]]]]}, "2026-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.75, 3.0], [-53.53, 3.53], [-53.0, 3.75], [-52.75, 3.65], [-52.5, 3.75], [-52.25, 3.65], [-52.0, 3.75], [-51.75, 3.65], [-51.68, 3.68], [-51.65, 3.75], [-51.75, 4.0], [-51.53, 4.53], [-51.0, 4.75], [-50.75, 4.65], [-50.68, 4.68], [-50.53, 5.03], [-50.0, 5.25], [-49.75, 5.15], [-49.5, 5.25], [-48.97, 5.03], [-48.82, 4.68], [-48.47, 4.53], [-48.32, 4.18], [-47.97, 4.03], [-47.75, 3.5], [-47.85, 3.25], [-47.75, 3.0], [-47.97, 2.47], [-48.5, 2.25], [-48.75, 2.35], [-49.0, 2.25], [-49.25, 2.35], [-49.5, 2.25], [-49.75, 2.35], [-50.0, 2.25], [-50.3, 2.38], [-50.47, 1.97], [-51.0, 1.75], [-51.5, 1.96], [-52.0, 1.75], [-52.25, 1.85], [-52.5, 1.75], [-53.03, 1.97], [-53.18, 2.32], [-53.53, 2.47], [-53.75, 3.0]]]]}, "2026-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.0, 3.25], [-51.47, 3.03], [-51.25, 2.5], [-51.47, 1.97], [-52.0, 1.75], [-52.53, 1.97], [-52.75, 2.5], [-52.53, 3.03], [-52.0, 3.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.6601332917800278}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.1237130011045995}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.160457102457713, 27.239852600097663, 27.17250071207684, 25.97144470214846]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.69125137329104, 27.71331939697268, 27.775778706868493, 25.97144470214846]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.0945030623405683, 1.1760471130611974, 1.1056903898625365, 0.9961739523420192]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.563036692251444, 1.5729031721640467, 1.6601332917800278, 0.9961739523420192]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [2.024794496885591, 2.2023290268303937, 1.9899172471968833, 1.2712127618681024]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.8321254633866184, 2.829783696992729, 2.912899002504785, 1.2712127618681024]}}