{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:30.378839", "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-04_to_2026-Apr-07_241.5_49.5"}, "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": 2026040001323}, "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 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 07 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": 120426.89642972116}, "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", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 49.5}, "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": 241.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "241.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 239.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 246.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.54, 50.5], [-120.75, 51.0], [-120.65, 51.25], [-120.75, 51.5], [-120.53, 52.03], [-120.0, 52.25], [-119.75, 52.15], [-119.5, 52.25], [-118.97, 52.03], [-118.75, 51.5], [-118.85, 51.25], [-118.82, 51.18], [-118.75, 51.15], [-118.5, 51.25], [-117.97, 51.03], [-117.82, 50.68], [-117.47, 50.53], [-117.32, 50.18], [-117.25, 50.15], [-117.0, 50.25], [-116.47, 50.03], [-116.25, 49.5], [-116.47, 48.97], [-117.0, 48.75], [-117.25, 48.85], [-117.5, 48.75], [-117.75, 48.85], [-118.0, 48.75], [-118.25, 48.85], [-118.5, 48.75], [-118.75, 48.85], [-119.0, 48.75], [-119.25, 48.85], [-119.5, 48.75], [-119.75, 48.85], [-120.0, 48.75], [-120.53, 48.97], [-120.75, 49.5], [-120.65, 49.75], [-120.75, 50.0], [-120.54, 50.5]]]]}, "2026-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.54, 50.5], [-120.75, 51.0], [-120.65, 51.25], [-120.75, 51.5], [-120.53, 52.03], [-120.0, 52.25], [-119.75, 52.15], [-119.5, 52.25], [-118.97, 52.03], [-118.75, 51.5], [-118.85, 51.25], [-118.82, 51.18], [-118.75, 51.15], [-118.5, 51.25], [-117.97, 51.03], [-117.82, 50.68], [-117.47, 50.53], [-117.32, 50.18], [-117.25, 50.15], [-117.0, 50.25], [-116.75, 50.15], [-116.5, 50.25], [-116.25, 50.15], [-116.0, 50.25], [-115.47, 50.03], [-115.32, 49.68], [-115.25, 49.65], [-115.0, 49.75], [-114.47, 49.53], [-114.32, 49.18], [-113.97, 49.03], [-113.75, 48.5], [-113.85, 48.25], [-113.82, 48.18], [-113.47, 48.03], [-113.25, 47.5], [-113.35, 47.25], [-113.25, 47.0], [-113.47, 46.47], [-114.0, 46.25], [-114.25, 46.35], [-114.32, 46.32], [-114.35, 46.25], [-114.25, 46.0], [-114.47, 45.47], [-115.0, 45.25], [-115.25, 45.35], [-115.5, 45.25], [-116.03, 45.47], [-116.25, 46.0], [-116.15, 46.25], [-116.18, 46.32], [-116.25, 46.35], [-116.5, 46.25], [-116.75, 46.35], [-117.0, 46.25], [-117.53, 46.47], [-117.75, 47.0], [-117.53, 47.53], [-117.18, 47.68], [-117.15, 47.75], [-117.18, 47.82], [-117.25, 47.85], [-117.5, 47.75], [-117.75, 47.85], [-118.0, 47.75], [-118.53, 47.97], [-118.68, 48.32], [-119.03, 48.47], [-119.18, 48.82], [-119.25, 48.85], [-119.5, 48.75], [-119.75, 48.85], [-120.0, 48.75], [-120.53, 48.97], [-120.75, 49.5], [-120.65, 49.75], [-120.75, 50.0], [-120.54, 50.5]]]]}, "2026-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.54, 50.5], [-120.75, 51.0], [-120.65, 51.25], [-120.75, 51.5], [-120.53, 52.03], [-120.0, 52.25], [-119.75, 52.15], [-119.5, 52.25], [-118.97, 52.03], [-118.75, 51.5], [-118.85, 51.25], [-118.82, 51.18], [-118.75, 51.15], [-118.5, 51.25], [-117.97, 51.03], [-117.82, 50.68], [-117.47, 50.53], [-117.32, 50.18], [-117.25, 50.15], [-117.0, 50.25], [-116.75, 50.15], [-116.5, 50.25], [-116.25, 50.15], [-116.0, 50.25], [-115.47, 50.03], [-115.32, 49.68], [-115.25, 49.65], [-115.0, 49.75], [-114.47, 49.53], [-114.32, 49.18], [-113.97, 49.03], [-113.75, 48.5], [-113.85, 48.25], [-113.82, 48.18], [-113.47, 48.03], [-113.25, 47.5], [-113.35, 47.25], [-113.25, 47.0], [-113.47, 46.47], [-114.0, 46.25], [-114.25, 46.35], [-114.32, 46.32], [-114.35, 46.25], [-114.25, 46.0], [-114.47, 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recorded over entire duration", "value": 9.043051083487399}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.848076997603194}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.053710321794483, 7.603409369517124, 9.127226485774997, 9.577913985015698]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.035605367024743, 11.664456939697288, 13.285400644938193, 14.335349019368493]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.347413094677456, 5.183490229824902, 6.4550818456156165, 6.527012049130329]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.960861590151694, 6.43762337598929, 8.312987662441344, 9.043051083487399]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5024812475713585, 1.6407723847267757, 2.0830164871871126, 2.0668601850149906]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.67137691365716, 2.0719557220870484, 2.660604713772701, 2.7989346817609997]}}