{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:11.240360", "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": "2012-Apr-21_to_2012-Apr-24_273.0_34.0"}, "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": 2012040001107}, "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 21 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2012"}, "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": 176424.23742106595}, "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": 34.0}, "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": 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": 269.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 38.53], [-90.68, 38.68], [-90.53, 39.03], [-90.0, 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35.82], [-91.03, 35.97], [-91.25, 36.5], [-91.04, 37.0], [-91.25, 37.5], [-91.15, 37.75], [-91.25, 38.0], [-91.03, 38.53]]]]}, "2012-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 38.53], [-90.68, 38.68], [-90.53, 39.03], [-90.0, 39.25], [-89.75, 39.15], [-89.68, 39.18], [-89.53, 39.53], [-89.0, 39.75], [-88.75, 39.65], [-88.5, 39.75], [-88.25, 39.65], [-88.0, 39.75], [-87.75, 39.65], [-87.5, 39.75], [-87.0, 39.54], [-86.5, 39.75], [-85.97, 39.53], [-85.82, 39.18], [-85.47, 39.03], [-85.25, 38.5], [-85.47, 37.97], [-85.82, 37.82], [-85.97, 37.47], [-86.32, 37.32], [-86.47, 36.97], [-86.82, 36.82], [-86.97, 36.47], [-87.32, 36.32], [-87.47, 35.97], [-87.82, 35.82], [-87.97, 35.47], [-88.32, 35.32], [-88.37, 35.2], [-88.25, 35.15], [-88.0, 35.25], [-87.75, 35.15], [-87.5, 35.25], [-87.25, 35.15], [-87.0, 35.25], [-86.47, 35.03], [-86.25, 34.5], [-86.35, 34.25], [-86.25, 34.0], [-86.47, 33.47], [-86.82, 33.32], [-86.97, 32.97], [-87.32, 32.82], [-87.47, 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