{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:13.316683", "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": "2018-Jul-28_to_2018-Aug-01_270.5_39.0"}, "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": 2018070001207}, "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": "July 28 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 01 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 96095.02158680712}, "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": 39.0}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 40.0], [-92.03, 40.53], [-91.5, 40.75], [-91.25, 40.65], [-91.18, 40.68], [-91.03, 41.03], [-90.5, 41.25], [-90.25, 41.15], [-90.0, 41.25], [-89.75, 41.15], [-89.5, 41.25], [-88.97, 41.03], [-88.82, 40.68], [-88.47, 40.53], [-88.25, 40.0], [-88.47, 39.47], [-88.82, 39.32], [-88.97, 38.97], [-89.5, 38.75], [-89.75, 38.85], [-90.0, 38.75], [-90.25, 38.85], [-90.5, 38.75], [-90.75, 38.85], [-91.0, 38.75], [-91.53, 38.97], [-91.68, 39.32], [-92.03, 39.47], [-92.25, 40.0]]]]}, "2018-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 40.0], [-92.03, 40.53], [-91.5, 40.75], [-91.25, 40.65], [-91.18, 40.68], [-91.03, 41.03], [-90.5, 41.25], [-90.25, 41.15], [-90.0, 41.25], [-89.75, 41.15], [-89.5, 41.25], [-88.97, 41.03], [-88.82, 40.68], [-88.47, 40.53], [-88.32, 40.18], [-88.25, 40.15], [-88.0, 40.25], [-87.75, 40.15], [-87.5, 40.25], [-86.97, 40.03], [-86.75, 39.5], [-86.97, 38.97], [-87.5, 38.75], [-87.75, 38.85], [-87.82, 38.82], [-87.85, 38.75], [-87.75, 38.5], [-87.97, 37.97], [-88.5, 37.75], [-89.03, 37.97], [-89.18, 38.32], [-89.25, 38.35], [-89.5, 38.25], [-89.75, 38.35], [-90.0, 38.25], [-90.5, 38.46], [-91.0, 38.25], [-91.53, 38.47], [-91.75, 39.0], [-91.65, 39.25], [-91.68, 39.32], [-92.03, 39.47], [-92.25, 40.0]]]]}, "2018-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 40.0], [-92.03, 40.53], [-91.5, 40.75], [-91.25, 40.65], [-91.18, 40.68], [-91.03, 41.03], [-90.5, 41.25], [-90.25, 41.15], [-90.0, 41.25], [-89.75, 41.15], [-89.5, 41.25], [-88.97, 41.03], [-88.82, 40.68], [-88.47, 40.53], [-88.32, 40.18], [-88.25, 40.15], [-88.0, 40.25], [-87.75, 40.15], [-87.5, 40.25], [-86.97, 40.03], [-86.82, 39.68], [-86.75, 39.65], [-86.5, 39.75], [-85.97, 39.53], [-85.75, 39.0], [-85.97, 38.47], [-86.5, 38.25], [-86.75, 38.35], [-86.82, 38.32], [-86.97, 37.97], [-87.5, 37.75], [-87.75, 37.85], [-87.82, 37.82], [-87.97, 37.47], [-88.5, 37.25], [-88.75, 37.35], [-89.0, 37.25], [-89.25, 37.35], [-89.32, 37.32], [-89.47, 36.97], [-90.0, 36.75], [-90.25, 36.85], [-90.5, 36.75], [-90.75, 36.85], [-91.0, 36.75], [-91.53, 36.97], [-91.75, 37.5], [-91.65, 37.75], [-91.75, 38.0], [-91.65, 38.25], [-91.75, 38.5], [-91.65, 38.75], [-91.75, 39.0], [-91.65, 39.25], [-91.68, 39.32], [-92.03, 39.47], [-92.25, 40.0]]]]}, "2018-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.65, 38.25], [-91.75, 38.5], [-91.65, 38.75], [-91.75, 39.0], [-91.53, 39.53], [-91.0, 39.75], [-90.5, 39.54], [-90.0, 39.75], [-89.75, 39.65], [-89.5, 39.75], [-89.25, 39.65], [-89.18, 39.68], [-89.03, 40.03], [-88.5, 40.25], [-88.25, 40.15], [-88.0, 40.25], [-87.75, 40.15], [-87.5, 40.25], [-86.97, 40.03], [-86.82, 39.68], [-86.75, 39.65], [-86.5, 39.75], [-85.97, 39.53], [-85.75, 39.0], [-85.97, 38.47], [-86.5, 38.25], [-86.75, 38.35], [-86.82, 38.32], [-86.97, 37.97], [-87.5, 37.75], [-87.75, 37.85], [-87.82, 37.82], [-87.97, 37.47], [-88.5, 37.25], [-88.75, 37.35], [-89.0, 37.25], [-89.25, 37.35], [-89.32, 37.32], [-89.47, 36.97], [-90.0, 36.75], 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