{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:24.794009", "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-Jul-25_to_2023-Jul-29_246.0_54.0"}, "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": 2023070000714}, "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": "July 25 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 29 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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 103621.75883068767}, "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": []}, "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": 54.0}, "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": 246.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 240.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 249.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-120.03, 55.03], [-119.5, 55.25], [-119.25, 55.15], [-119.18, 55.18], [-119.03, 55.53], [-118.5, 55.75], [-118.25, 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[-115.5, 52.25], [-115.75, 52.35], [-116.0, 52.25], [-116.53, 52.47], [-116.68, 52.82], [-116.75, 52.85], [-117.0, 52.75], [-117.53, 52.97], [-117.75, 53.5], [-117.65, 53.75], [-117.68, 53.82], [-117.75, 53.85], [-118.0, 53.75], [-118.25, 53.85], [-118.5, 53.75], [-118.75, 53.85], [-119.0, 53.75], [-119.25, 53.85], [-119.5, 53.75], [-120.03, 53.97], [-120.25, 54.5], [-120.03, 55.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.5, 53.75], [-120.03, 53.97], [-120.25, 54.5], [-120.03, 55.03], [-119.5, 55.25], [-119.25, 55.15], [-119.18, 55.18], [-119.03, 55.53], [-118.5, 55.75], [-118.25, 55.65], [-118.0, 55.75], [-117.47, 55.53], [-117.25, 55.0], [-117.35, 54.75], [-117.25, 54.5], [-117.47, 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"Mean t2m anomaly over entire duration", "value": -4.3491254032133275}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.671346335290025, 12.169032398181457, 12.573615253563617, 12.049634459232891, 13.089995611464417]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.293103326492371, 9.119623069250338, 10.52401477780603, 9.908517470112542, 11.460525409063393]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.345992628274246, -4.669425019046081, -4.14458994419813, -4.683489666655177, -3.794448278456073]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.916438202864242, -6.169051563005269, -4.842353153518729, -5.837183095370847, -4.3935030745632275]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.689600224778691, -1.793758633631407, -1.54954114485449, -1.723322580502163, -1.4097754105930775]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9443132383617512, -2.3618426329136133, -1.8127594298394583, -2.0866404135362457, -1.6640366628246601]}}