{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:00.943669", "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": "2013-Apr-11_to_2013-Apr-14_272.0_45.0"}, "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": 2013040000441}, "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 11 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 14 2013"}, "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": 164771.14599880658}, "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": ["C.North-America", "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": []}, "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": 45.0}, "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": 272.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 264.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 272.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 46.47], [-91.75, 47.0], [-91.53, 47.53], [-91.0, 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46.03], [-86.75, 45.5], [-86.85, 45.25], [-86.75, 45.0], [-86.85, 44.75], [-86.75, 44.5], [-86.97, 43.97], [-87.5, 43.75], [-87.75, 43.85], [-88.0, 43.75], [-88.25, 43.85], [-88.5, 43.75], [-88.75, 43.85], [-89.0, 43.75], [-89.25, 43.85], [-89.32, 43.82], [-89.47, 43.47], [-90.0, 43.25], [-90.53, 43.47], [-90.68, 43.82], [-90.75, 43.85], [-90.82, 43.82], [-90.97, 43.47], [-91.5, 43.25], [-91.75, 43.35], [-92.0, 43.25], [-92.25, 43.35], [-92.5, 43.25], [-92.75, 43.35], [-93.0, 43.25], [-93.53, 43.47], [-93.68, 43.82], [-93.75, 43.85], [-94.0, 43.75], [-94.25, 43.85], [-94.5, 43.75], [-94.75, 43.85], [-95.0, 43.75], [-95.53, 43.97], [-95.75, 44.5], [-95.65, 44.75], [-95.75, 45.0], [-95.53, 45.53]]]]}, "2013-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.53, 45.53], [-95.0, 45.75], [-94.75, 45.65], [-94.62, 45.7], [-94.68, 45.82], [-95.03, 45.97], [-95.25, 46.5], [-95.03, 47.03], [-94.68, 47.18], [-94.53, 47.53], [-94.0, 47.75], [-93.75, 47.65], [-93.68, 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"anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.46299836939303, -1.4482778939217125, -1.5801625944242539, -1.7446429088836337]}}