{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:26.704244", "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-Feb-13_to_2025-Feb-16_273.0_57.5"}, "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": 2025020000338}, "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": "February 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 16 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": 167080.23656732275}, "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": 57.5}, "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": 273.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "273.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 57.53], [-91.13, 57.7], [-91.18, 57.82], [-91.53, 57.97], [-91.75, 58.5], [-91.53, 59.03], [-91.0, 59.25], 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[-89.0, 54.75], [-89.25, 54.85], [-89.5, 54.75], [-90.03, 54.97], [-90.18, 55.32], [-90.53, 55.47], [-90.75, 56.0], [-90.65, 56.25], [-90.68, 56.32], [-90.75, 56.35], [-91.0, 56.25], [-91.53, 56.47], [-91.75, 57.0], [-91.53, 57.53]]]]}}, "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": {"2025-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.0, 56.25], [-91.52999999999997, 56.47], [-91.75, 57.0], [-91.52999999999997, 57.53], [-91.0, 57.75], [-90.75, 57.65], [-90.5, 57.75], [-90.25, 57.65], [-90.0, 57.75], [-89.75, 57.65], [-89.5, 57.75], [-89.25, 57.65], [-89.0, 57.75], [-88.69999999999999, 57.62], [-88.52999999999997, 58.03], [-88.0, 58.25], [-87.75, 58.15], [-87.5, 58.25], [-87.25, 58.15], [-87.0, 58.25], [-86.47000000000003, 58.03], [-86.25, 57.5], 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"The daily evolution of maximum t2m.", "value": [-36.5641012827555, -33.91481183369953, -34.34812266031898, -31.543032709757455]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.727342111674268, -5.860847423782868, -6.776378997881267, -6.238304201890851]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.895414763034182, -9.411627466756102, -10.399735170311573, -7.790013417049806]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5964187898878848, -1.4061470830883152, -1.574213500139915, -1.4956185720163553]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.105987939411661, -1.6448466440580005, -1.8501814479534997, -1.767955483438797]}}