{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:14.197262", "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": "2025-Jan-07_to_2025-Jan-09_277.0_28.0"}, "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": 2025010000218}, "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": "January 07 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 09 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 127599.44072671582}, "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": 28.0}, "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": 277.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 271.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.0, 31.25], [-87.47, 31.03], [-87.32, 30.68], [-87.25, 30.65], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47, 30.53], [-83.25, 30.0], [-83.37, 29.7], [-83.25, 29.65], [-83.0, 29.75], [-82.47, 29.53], [-82.25, 29.0], [-82.35, 28.75], [-82.25, 28.5], [-82.35, 28.25], [-82.25, 28.0], [-82.35, 27.75], [-82.25, 27.5], [-82.47, 26.97], [-83.0, 26.75], [-83.25, 26.85], [-83.32, 26.82], [-83.47, 26.47], [-84.0, 26.25], [-84.25, 26.35], [-84.32, 26.32], [-84.47, 25.97], [-85.0, 25.75], [-85.25, 25.85], [-85.5, 25.75], [-85.75, 25.85], [-86.0, 25.75], [-86.53, 25.97], [-86.75, 26.5], [-86.53, 27.03], [-86.18, 27.18], [-86.15, 27.25], [-86.25, 27.5], [-86.15, 27.75], [-86.18, 27.82], [-86.53, 27.97], [-86.68, 28.32], [-87.03, 28.47], [-87.25, 29.0], [-87.15, 29.25], [-87.18, 29.32], [-87.25, 29.35], [-87.5, 29.25], [-87.75, 29.35], [-88.0, 29.25], [-88.25, 29.35], [-88.5, 29.25], [-89.03, 29.47], [-89.25, 30.0], [-89.03, 30.53], [-88.68, 30.68], [-88.53, 31.03], [-88.0, 31.25]]]]}, "2025-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.0, 31.25], [-87.47, 31.03], [-87.32, 30.68], [-87.25, 30.65], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47, 30.53], [-83.25, 30.0], [-83.37, 29.7], [-83.25, 29.65], [-83.0, 29.75], [-82.47, 29.53], [-82.25, 29.0], [-82.35, 28.75], [-82.25, 28.5], [-82.35, 28.25], [-82.25, 28.0], [-82.35, 27.75], [-82.25, 27.5], [-82.47, 26.97], [-83.0, 26.75], [-83.25, 26.85], [-83.32, 26.82], [-83.47, 26.47], [-84.0, 26.25], [-84.25, 26.35], [-84.32, 26.32], [-84.47, 25.97], [-85.0, 25.75], [-85.25, 25.85], [-85.5, 25.75], [-85.75, 25.85], [-86.0, 25.75], [-86.53, 25.97], [-86.75, 26.5], [-86.53, 27.03], [-86.18, 27.18], [-86.15, 27.25], [-86.25, 27.5], [-86.15, 27.75], [-86.18, 27.82], [-86.53, 27.97], [-86.68, 28.32], [-87.03, 28.47], [-87.25, 29.0], [-87.15, 29.25], [-87.18, 29.32], [-87.25, 29.35], [-87.5, 29.25], [-87.75, 29.35], [-88.0, 29.25], [-88.25, 29.35], [-88.5, 29.25], [-89.03, 29.47], [-89.25, 30.0], [-89.03, 30.53], [-88.68, 30.68], [-88.53, 31.03], [-88.0, 31.25]]]]}, "2025-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.0, 31.25], [-87.47, 31.03], [-87.32, 30.68], [-87.25, 30.65], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47, 30.53], [-83.25, 30.0], [-83.37, 29.7], [-83.25, 29.65], [-83.0, 29.75], [-82.47, 29.53], [-82.25, 29.0], [-82.35, 28.75], [-82.25, 28.5], [-82.35, 28.25], [-82.25, 28.0], [-82.35, 27.75], [-82.25, 27.5], [-82.47, 26.97], [-83.0, 26.75], [-83.25, 26.85], [-83.32, 26.82], [-83.47, 26.47], [-84.0, 26.25], [-84.25, 26.35], [-84.32, 26.32], [-84.47, 25.97], [-85.0, 25.75], [-85.25, 25.85], [-85.5, 25.75], [-85.75, 25.85], [-86.0, 25.75], [-86.53, 25.97], [-86.75, 26.5], [-86.53, 27.03], [-86.18, 27.18], [-86.15, 27.25], [-86.25, 27.5], [-86.15, 27.75], [-86.18, 27.82], [-86.53, 27.97], [-86.68, 28.32], [-87.03, 28.47], [-87.25, 29.0], [-87.15, 29.25], [-87.18, 29.32], [-87.25, 29.35], [-87.5, 29.25], [-87.75, 29.35], [-88.0, 29.25], [-88.25, 29.35], [-88.5, 29.25], [-89.03, 29.47], [-89.25, 30.0], [-89.03, 30.53], [-88.68, 30.68], [-88.53, 31.03], [-88.0, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.9294187812514}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.26505499026636}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.143101452766587, 10.667247783038647, 10.76710833285722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.920117950439476, 4.884931182861351, 5.225909169514978]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.730940808811253, -6.144158211918072, -5.920065950069744]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.9294187812514, -7.5220041474773325, -7.312850121873112]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.785127634269897, -1.6807483636874792, -1.6100764103975151]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9420527602056727, -1.9857525078120795, -1.9258491082393645]}}