{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:18.973638", "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-Jan-14_to_2023-Jan-16_281.0_25.5"}, "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": 2023010000699}, "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": "January 14 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 231685.2316775705}, "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": ["Bahamas", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": ["Atlantic Ocean", "Great Bahama"]}, "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": 25.5}, "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": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 277.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 283.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 28.0], [-83.15, 28.25], [-83.25, 28.5], [-83.03, 29.03], [-82.5, 29.25], [-81.97, 29.03], [-81.82, 28.68], [-81.47, 28.53], [-81.3, 28.12], [-81.0, 28.25], [-80.75, 28.15], [-80.5, 28.25], [-80.25, 28.15], [-80.0, 28.25], [-79.47, 28.03], [-79.3, 27.62], [-79.0, 27.75], [-78.75, 27.65], [-78.5, 27.75], [-78.25, 27.65], [-78.0, 27.75], [-77.47, 27.53], [-77.32, 27.18], [-77.25, 27.15], [-77.0, 27.25], [-76.47, 27.03], [-76.25, 26.5], [-76.35, 26.25], [-76.32, 26.18], [-75.97, 26.03], [-75.75, 25.5], [-75.85, 25.25], [-75.75, 25.0], [-75.85, 24.75], [-75.75, 24.5], [-75.85, 24.25], [-75.75, 24.0], [-75.97, 23.47], [-76.5, 23.25], [-76.75, 23.35], [-76.82, 23.32], [-76.97, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.25, 22.85], [-78.5, 22.75], [-78.75, 22.85], [-79.0, 22.75], [-79.25, 22.85], [-79.5, 22.75], [-79.75, 22.85], [-80.0, 22.75], [-80.25, 22.85], [-80.5, 22.75], [-80.75, 22.85], [-81.0, 22.75], [-81.53, 22.97], [-81.68, 23.32], [-82.03, 23.47], [-82.25, 24.0], [-82.15, 24.25], [-82.25, 24.5], [-82.15, 24.75], [-82.25, 25.0], [-82.15, 25.25], [-82.18, 25.32], [-82.53, 25.47], [-82.75, 26.0], [-82.65, 26.25], [-82.68, 26.32], [-83.03, 26.47], [-83.25, 27.0], [-83.15, 27.25], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "Caribbean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 27.5], [-83.14999999999998, 27.75], [-83.25, 28.0], [-83.14999999999998, 28.25], [-83.25, 28.5], [-83.02999999999997, 29.03], [-82.5, 29.25], [-81.97000000000003, 29.03], [-81.82, 28.68], [-81.47000000000003, 28.53], [-81.30000000000001, 28.12], [-81.0, 28.25], [-80.75, 28.15], [-80.5, 28.25], [-80.25, 28.15], [-80.0, 28.25], [-79.47000000000003, 28.03], [-79.30000000000001, 27.62], [-79.0, 27.75], [-78.75, 27.65], [-78.5, 27.75], [-78.25, 27.65], [-78.0, 27.75], [-77.47000000000003, 27.53], [-77.32, 27.18], [-77.25, 27.15], [-77.0, 27.25], [-76.47000000000003, 27.03], [-76.25, 26.5], [-76.35000000000002, 26.25], [-76.32, 26.18], [-75.97000000000003, 26.03], [-75.75, 25.5], [-75.85000000000002, 25.25], [-75.75, 25.0], [-75.85000000000002, 24.75], [-75.75, 24.5], [-75.85000000000002, 24.25], [-75.75, 24.0], [-75.97000000000003, 23.47], [-76.5, 23.25], [-76.75, 23.35], [-76.82, 23.32], [-76.97000000000003, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.25, 22.85], [-78.5, 22.75], [-78.75, 22.85], [-79.0, 22.75], [-79.25, 22.85], [-79.5, 22.75], [-79.75, 22.85], [-80.0, 22.75], [-80.25, 22.85], [-80.5, 22.75], [-80.75, 22.85], [-81.0, 22.75], [-81.52999999999997, 22.97], [-81.68, 23.32], [-82.02999999999997, 23.47], [-82.25, 24.0], [-82.14999999999998, 24.25], [-82.25, 24.5], [-82.14999999999998, 24.75], [-82.25, 25.0], [-82.14999999999998, 25.25], [-82.18, 25.32], [-82.52999999999997, 25.47], [-82.75, 26.0], [-82.64999999999998, 26.25], [-82.68, 26.32], [-83.02999999999997, 26.47], [-83.25, 27.0], [-83.14999999999998, 27.25], [-83.25, 27.5]]]]}, "2023-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 27.5], [-83.14999999999998, 27.75], [-83.25, 28.0], [-83.14999999999998, 28.25], [-83.25, 28.5], [-83.02999999999997, 29.03], [-82.5, 29.25], [-81.97000000000003, 29.03], [-81.82, 28.68], [-81.47000000000003, 28.53], [-81.30000000000001, 28.12], [-81.0, 28.25], [-80.75, 28.15], [-80.5, 28.25], [-80.25, 28.15], [-80.0, 28.25], [-79.47000000000003, 28.03], [-79.30000000000001, 27.62], [-79.0, 27.75], [-78.75, 27.65], [-78.5, 27.75], [-78.25, 27.65], [-78.0, 27.75], [-77.47000000000003, 27.53], [-77.32, 27.18], [-77.25, 27.15], [-77.0, 27.25], [-76.47000000000003, 27.03], [-76.25, 26.5], [-76.35000000000002, 26.25], [-76.32, 26.18], [-75.97000000000003, 26.03], [-75.75, 25.5], [-75.85000000000002, 25.25], [-75.75, 25.0], [-75.85000000000002, 24.75], [-75.75, 24.5], [-75.85000000000002, 24.25], [-75.75, 24.0], [-75.97000000000003, 23.47], [-76.5, 23.25], [-76.75, 23.35], [-76.82, 23.32], [-76.97000000000003, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.25, 22.85], [-78.5, 22.75], [-78.75, 22.85], [-79.0, 22.75], [-79.25, 22.85], [-79.5, 22.75], [-79.75, 22.85], [-80.0, 22.75], [-80.25, 22.85], [-80.5, 22.75], [-80.75, 22.85], [-81.0, 22.75], [-81.52999999999997, 22.97], [-81.68, 23.32], [-82.02999999999997, 23.47], [-82.25, 24.0], [-82.14999999999998, 24.25], [-82.25, 24.5], [-82.14999999999998, 24.75], [-82.25, 25.0], [-82.14999999999998, 25.25], [-82.18, 25.32], [-82.52999999999997, 25.47], [-82.75, 26.0], [-82.64999999999998, 26.25], [-82.68, 26.32], [-83.02999999999997, 26.47], [-83.25, 27.0], [-83.14999999999998, 27.25], [-83.25, 27.5]]]]}, "2023-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 27.5], [-83.14999999999998, 27.75], [-83.25, 28.0], [-83.14999999999998, 28.25], [-83.25, 28.5], [-83.02999999999997, 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evolution of maximum t2m.", "value": [8.56248559258745, 7.062715298002445, 7.812420814875907]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.304520077371572, -5.737931237564284, -3.758963736059921]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.749540288513458, -9.018590193281455, -6.955046110123021]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.126460694158449, -2.900493565420584, -1.7655441888190542]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.202945542393614, -3.754588599246876, -2.468173074560028]}}