{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:18:51.779894", "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": "2020-Feb-27_to_2020-Mar-01_279.5_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": 2020020000783}, "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 27 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 01 2020"}, "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": 69158.30276998552}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Caribbean", "E.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": ["Gulf of Mexico", "North Atlantic Ocean"]}, "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": 279.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.15, 29.25], [-81.25, 29.5], [-81.03, 30.03], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.97, 27.97], [-80.5, 27.75], [-81.03, 27.97], [-81.25, 28.5], [-81.15, 28.75], [-81.25, 29.0], [-81.15, 29.25]]]]}, "2020-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 25.53], [-83.0, 25.75], [-82.75, 25.65], [-82.5, 25.75], [-82.25, 25.65], [-82.12, 25.7], [-82.25, 26.0], [-82.04, 26.5], [-82.18, 26.82], [-82.53, 26.97], [-82.75, 27.5], [-82.53, 28.03], [-82.0, 28.25], [-81.75, 28.15], [-81.68, 28.18], [-81.65, 28.25], [-81.75, 28.5], [-81.53, 29.03], [-81.18, 29.18], [-81.15, 29.25], [-81.25, 29.5], [-81.03, 30.03], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.96, 28.0], [-79.75, 27.5], [-79.97, 26.97], [-80.32, 26.82], [-80.35, 26.75], [-80.32, 26.68], [-79.97, 26.53], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.97, 24.97], [-80.32, 24.82], [-80.47, 24.47], [-81.0, 24.25], [-81.25, 24.35], [-81.32, 24.32], [-81.47, 23.97], [-82.0, 23.75], [-82.25, 23.85], [-82.5, 23.75], [-82.75, 23.85], [-83.0, 23.75], [-83.53, 23.97], [-83.75, 24.5], [-83.65, 24.75], [-83.75, 25.0], [-83.53, 25.53]]]]}, "2020-02-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 25.53], [-83.0, 25.75], [-82.75, 25.65], [-82.5, 25.75], [-82.25, 25.65], [-82.12, 25.7], [-82.25, 26.0], [-82.04, 26.5], [-82.18, 26.82], [-82.53, 26.97], [-82.75, 27.5], [-82.53, 28.03], [-82.0, 28.25], [-81.75, 28.15], [-81.68, 28.18], [-81.65, 28.25], [-81.75, 28.5], [-81.53, 29.03], [-81.18, 29.18], [-81.15, 29.25], [-81.25, 29.5], [-81.03, 30.03], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.96, 28.0], [-79.75, 27.5], [-79.97, 26.97], [-80.32, 26.82], [-80.35, 26.75], [-80.32, 26.68], [-79.97, 26.53], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.97, 24.97], [-80.32, 24.82], [-80.47, 24.47], [-81.0, 24.25], [-81.25, 24.35], [-81.32, 24.32], [-81.47, 23.97], [-82.0, 23.75], [-82.25, 23.85], [-82.5, 23.75], [-82.75, 23.85], [-83.0, 23.75], [-83.53, 23.97], [-83.75, 24.5], [-83.65, 24.75], [-83.75, 25.0], [-83.53, 25.53]]]]}, "2020-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 25.53], [-83.0, 25.75], [-82.75, 25.65], [-82.5, 25.75], [-82.25, 25.65], [-82.12, 25.7], [-82.25, 26.0], [-82.04, 26.5], [-82.18, 26.82], [-82.53, 26.97], [-82.75, 27.5], [-82.53, 28.03], [-82.0, 28.25], [-81.75, 28.15], [-81.68, 28.18], [-81.65, 28.25], [-81.75, 28.5], [-81.53, 29.03], [-81.0, 29.25], [-80.47, 29.03], [-80.25, 28.5], [-80.35, 28.25], [-80.32, 28.18], [-79.97, 28.03], [-79.75, 27.5], [-79.97, 26.97], [-80.32, 26.82], [-80.35, 26.75], [-80.32, 26.68], [-79.97, 26.53], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.97, 24.97], [-80.32, 24.82], [-80.47, 24.47], [-81.0, 24.25], [-81.25, 24.35], [-81.32, 24.32], [-81.47, 23.97], [-82.0, 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