{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:55.873091", "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": "2011-Nov-28_to_2011-Dec-01_271.5_28.5"}, "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": 2011110001303}, "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": "November 28 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 2011"}, "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": 86092.91132819492}, "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": ["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"]}, "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": 28.5}, "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": 271.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 270.75}, "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": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.65, 29.25], [-89.75, 29.5], [-89.53, 30.03], [-89.18, 30.18], [-89.03, 30.53], [-88.5, 30.75], [-87.97, 30.53], [-87.82, 30.18], [-87.47, 30.03], [-87.25, 29.5], [-87.35, 29.25], [-87.25, 29.0], [-87.35, 28.75], [-87.25, 28.5], [-87.47, 27.97], [-88.0, 27.75], [-88.25, 27.85], [-88.5, 27.75], [-88.75, 27.85], [-89.0, 27.75], [-89.53, 27.97], [-89.75, 28.5], [-89.65, 28.75], [-89.75, 29.0], [-89.65, 29.25]]]]}, "2011-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.65, 29.25], [-89.75, 29.5], [-89.53, 30.03], [-89.18, 30.18], [-89.15, 30.25], [-89.25, 30.5], [-89.15, 30.75], [-89.25, 31.0], [-89.03, 31.53], [-88.5, 31.75], [-88.25, 31.65], [-88.0, 31.75], [-87.5, 31.54], [-87.0, 31.75], [-86.75, 31.65], [-86.5, 31.75], [-85.97, 31.53], [-85.75, 31.0], [-85.85, 30.75], [-85.75, 30.5], [-85.85, 30.25], [-85.75, 30.0], [-85.85, 29.75], [-85.75, 29.5], [-85.85, 29.25], [-85.75, 29.0], [-85.96, 28.5], [-85.75, 28.0], [-85.97, 27.47], [-86.5, 27.25], [-86.75, 27.35], [-87.0, 27.25], [-87.25, 27.35], [-87.5, 27.25], [-88.03, 27.47], [-88.18, 27.82], [-88.25, 27.85], [-88.5, 27.75], [-88.75, 27.85], [-89.0, 27.75], [-89.53, 27.97], [-89.75, 28.5], [-89.65, 28.75], [-89.75, 29.0], [-89.65, 29.25]]]]}, "2011-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.65, 29.25], [-89.75, 29.5], [-89.53, 30.03], [-89.18, 30.18], [-89.15, 30.25], [-89.25, 30.5], [-89.15, 30.75], [-89.25, 31.0], [-89.03, 31.53], [-88.5, 31.75], [-88.25, 31.65], [-88.0, 31.75], [-87.5, 31.54], [-87.0, 31.75], [-86.75, 31.65], [-86.5, 31.75], [-85.97, 31.53], [-85.75, 31.0], [-85.85, 30.75], [-85.75, 30.5], [-85.85, 30.25], [-85.75, 30.0], [-85.85, 29.75], [-85.75, 29.5], [-85.85, 29.25], [-85.75, 29.0], [-85.96, 28.5], [-85.75, 28.0], [-85.97, 27.47], [-86.5, 27.25], [-86.75, 27.35], [-87.0, 27.25], [-87.25, 27.35], [-87.5, 27.25], [-88.03, 27.47], [-88.18, 27.82], [-88.25, 27.85], [-88.5, 27.75], [-88.75, 27.85], [-89.0, 27.75], [-89.53, 27.97], [-89.75, 28.5], [-89.65, 28.75], [-89.75, 29.0], [-89.65, 29.25]]]]}, "2011-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.03, 29.53], [-88.5, 29.75], [-89.03, 29.97], [-89.25, 30.5], [-89.15, 30.75], [-89.25, 31.0], [-89.03, 31.53], [-88.5, 31.75], [-88.25, 31.65], [-88.0, 31.75], [-87.5, 31.54], [-87.0, 31.75], [-86.75, 31.65], [-86.5, 31.75], [-85.97, 31.53], [-85.75, 31.0], [-85.85, 30.75], [-85.75, 30.5], [-85.85, 30.25], [-85.75, 30.0], [-85.85, 29.75], [-85.75, 29.5], [-85.85, 29.25], [-85.75, 29.0], [-85.96, 28.5], [-85.75, 28.0], [-85.97, 27.47], [-86.5, 27.25], [-86.75, 27.35], [-87.0, 27.25], [-87.25, 27.35], [-87.5, 27.25], [-88.03, 27.47], [-88.18, 27.82], [-88.25, 27.85], [-88.5, 27.75], [-89.03, 27.97], [-89.25, 28.5], [-89.15, 28.75], [-89.25, 29.0], [-89.03, 29.53]], [[-88.25, 29.65], [-88.18, 29.68], [-88.15, 29.75], [-88.18, 29.82], [-88.25, 29.85], [-88.5, 29.75], [-88.25, 29.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.411758738764036}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.580191082378494}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.988681103554427, 12.497014779642825, 12.432316276109702, 11.9471981225106]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.838443443409346, 5.88135349299165, 6.279615939543817, 5.331117692679925]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.422577803446257, -5.575302412724875, -5.464828249007445, -5.7888134241520195]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.918345817760553, -7.0279415826378795, -6.7224214073418125, -7.411758738764036]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7587291611454643, -1.6486582586729084, -1.5933547505077368, -1.6656644802856002]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9397824538855815, -1.8862130033904116, -1.8725350033506942, -1.9139839846469728]}}