{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:20.551527", "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": "2025-Apr-03_to_2025-Apr-06_306.0_52.5"}, "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": 2025040000168}, "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 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2025"}, "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": "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": 71629.81148044548}, "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": 52.5}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-53.35, 52.25], [-53.25, 52.0], [-53.35, 51.75], [-53.25, 51.5], [-53.47, 50.97], [-54.0, 50.75], [-54.53, 50.97], [-54.68, 51.32], [-55.03, 51.47], [-55.18, 51.82], [-55.25, 51.85], [-55.32, 51.82], [-55.47, 51.47], [-56.0, 51.25], [-56.25, 51.35], [-56.5, 51.25], [-57.03, 51.47], [-57.25, 52.0], [-57.15, 52.25], [-57.25, 52.5], [-57.04, 53.0], [-57.18, 53.32], [-57.25, 53.35], [-57.5, 53.25], [-58.03, 53.47], [-58.25, 54.0], [-58.15, 54.25], [-58.18, 54.32], [-58.53, 54.47], [-58.75, 55.0], [-58.65, 55.25], [-58.75, 55.5], [-58.53, 56.03], [-58.0, 56.25], [-57.75, 56.15], [-57.5, 56.25], [-56.97, 56.03], [-56.82, 55.68], [-56.75, 55.65], [-56.5, 55.75], [-55.97, 55.53], [-55.82, 55.18], [-55.75, 55.15], [-55.5, 55.25], [-54.97, 55.03], [-54.82, 54.68], [-54.47, 54.53], [-54.32, 54.18], [-54.25, 54.15], [-54.0, 54.25], [-53.47, 54.03], [-53.25, 53.5], [-53.35, 53.25], [-53.25, 53.0], [-53.35, 52.75], [-53.25, 52.5], [-53.35, 52.25]]]]}}, "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": {"2025-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.75, 55.5], [-58.52999999999997, 56.03], [-58.0, 56.25], [-57.75, 56.15], [-57.5, 56.25], [-56.97000000000003, 56.03], [-56.81999999999999, 55.68], [-56.75, 55.65], [-56.5, 55.75], [-55.97000000000003, 55.53], [-55.81999999999999, 55.18], [-55.75, 55.15], [-55.5, 55.25], [-54.97000000000003, 55.03], [-54.81999999999999, 54.68], [-54.47000000000003, 54.53], [-54.31999999999999, 54.18], [-54.25, 54.15], [-54.0, 54.25], [-53.47000000000003, 54.03], [-53.25, 53.5], [-53.35000000000002, 53.25], [-53.25, 53.0], [-53.35000000000002, 52.75], [-53.25, 52.5], [-53.35000000000002, 52.25], [-53.25, 52.0], [-53.35000000000002, 51.75], [-53.25, 51.5], [-53.47000000000003, 50.97], [-54.0, 50.75], [-54.52999999999997, 50.97], [-54.68000000000001, 51.32], [-55.02999999999997, 51.47], [-55.18000000000001, 51.82], [-55.25, 51.85], [-55.31999999999999, 51.82], [-55.47000000000003, 51.47], [-56.0, 51.25], [-56.25, 51.35], [-56.5, 51.25], [-57.02999999999997, 51.47], [-57.25, 52.0], [-57.14999999999998, 52.25], [-57.25, 52.5], [-57.04000000000002, 53.0], [-57.18000000000001, 53.32], [-57.25, 53.35], [-57.5, 53.25], [-58.02999999999997, 53.47], [-58.25, 54.0], [-58.14999999999998, 54.25], [-58.18000000000001, 54.32], [-58.52999999999997, 54.47], [-58.75, 55.0], [-58.64999999999998, 55.25], [-58.75, 55.5]]]]}, "2025-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.75, 55.5], [-58.52999999999997, 56.03], [-58.0, 56.25], [-57.75, 56.15], [-57.5, 56.25], [-56.97000000000003, 56.03], [-56.81999999999999, 55.68], [-56.75, 55.65], [-56.5, 55.75], [-55.97000000000003, 55.53], [-55.81999999999999, 55.18], [-55.75, 55.15], [-55.5, 55.25], [-54.97000000000003, 55.03], [-54.81999999999999, 54.68], [-54.47000000000003, 54.53], [-54.31999999999999, 54.18], [-54.25, 54.15], [-54.0, 54.25], 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-10.666004643888527, -9.532425976614661, -6.70155309041337]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-14.1840830485026, -13.37766621907548, -11.93471755981443, -6.70155309041337]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.590580704235765, -7.012603095197426, -6.023127995311957, -4.7480456187755635]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.140426988480442, -8.824636280553818, -7.15006146539929, -4.7480456187755635]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1775342006347067, -1.942332474145863, -1.6801482151294442, -1.6648977666134728]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.0449967798637427, -2.6325397986868984, -1.9947611000277468, -1.6648977666134728]}}