{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:20.496645", "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-Dec-17_to_2025-Dec-20_289.5_-8.0"}, "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": 2025120000600}, "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": "December 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 20 2025"}, "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": 168383.7730377579}, "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": ["Brazil"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -8.0}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -9.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-73.15, -7.25], [-73.25, -7.0], [-73.03, -6.47], [-72.5, -6.25], [-72.25, -6.35], [-72.18, -6.32], [-72.03, -5.97], [-71.5, -5.75], [-71.25, -5.85], [-71.0, -5.75], [-70.75, -5.85], [-70.68, -5.82], [-70.53, -5.47], [-70.0, -5.25], [-69.75, -5.35], [-69.5, -5.25], [-68.97, -5.47], [-68.82, -5.82], [-68.47, -5.97], [-68.25, -6.5], [-68.35, -6.75], [-68.32, -6.82], [-67.97, -6.97], [-67.75, -7.5], [-67.85, -7.75], [-67.82, -7.82], [-67.75, -7.85], [-67.5, -7.75], [-66.97, -7.97], [-66.75, -8.5], [-66.97, -9.03], [-67.5, -9.25], [-67.75, -9.15], [-68.0, -9.25], [-68.25, -9.15], [-68.5, -9.25], [-68.75, -9.15], [-68.82, -9.18], [-68.97, -9.53], [-69.5, -9.75], [-69.75, -9.65], [-69.82, -9.68], [-69.97, -10.03], [-70.5, -10.25], [-70.75, -10.15], [-71.0, -10.25], [-71.25, -10.15], [-71.5, -10.25], [-71.75, -10.15], [-72.0, -10.25], [-72.53, -10.03], [-72.68, -9.68], [-73.03, -9.53], [-73.25, -9.0], [-73.15, -8.75], [-73.25, -8.5], [-73.04, -8.0], [-73.25, -7.5], [-73.15, -7.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.South-America", "N.South-America", "South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.25, -8.5], [-73.04000000000002, -8.0], [-73.25, -7.5], [-73.14999999999998, -7.25], [-73.25, -7.0], [-73.02999999999997, -6.47], [-72.5, -6.25], [-72.25, -6.35], [-72.18, -6.32], [-72.02999999999997, -5.97], [-71.5, -5.75], [-71.25, -5.85], [-71.0, -5.75], [-70.75, -5.85], [-70.68, -5.82], [-70.52999999999997, -5.47], [-70.0, -5.25], [-69.75, -5.35], [-69.5, -5.25], [-68.97000000000003, -5.47], [-68.82, -5.82], [-68.47000000000003, -5.97], [-68.25, -6.5], [-68.35000000000002, -6.75], [-68.32, -6.82], [-67.97000000000003, -6.97], [-67.75, -7.5], [-67.85000000000002, -7.75], [-67.82, -7.82], [-67.75, -7.85], [-67.5, -7.75], [-66.97000000000003, -7.97], [-66.75, -8.5], [-66.97000000000003, -9.03], [-67.5, -9.25], [-67.75, -9.15], [-68.0, -9.25], [-68.25, -9.15], [-68.5, -9.25], [-68.75, -9.15], [-68.82, -9.18], [-68.97000000000003, -9.53], [-69.5, -9.75], [-69.75, -9.65], [-69.82, -9.68], [-69.97000000000003, -10.03], [-70.5, -10.25], [-70.75, -10.15], [-71.0, -10.25], [-71.25, -10.15], [-71.5, -10.25], [-71.75, -10.15], [-72.0, -10.25], [-72.52999999999997, -10.03], [-72.68, -9.68], [-73.02999999999997, -9.53], [-73.25, -9.0], [-73.14999999999998, -8.75], [-73.25, -8.5]]]]}, "2025-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.25, -8.5], [-73.04000000000002, -8.0], [-73.25, -7.5], [-73.14999999999998, -7.25], [-73.25, -7.0], [-73.02999999999997, -6.47], [-72.5, -6.25], [-72.25, -6.35], [-72.18, -6.32], [-72.02999999999997, -5.97], [-71.5, -5.75], [-71.25, -5.85], [-71.0, -5.75], [-70.75, -5.85], [-70.68, -5.82], [-70.52999999999997, -5.47], [-70.0, -5.25], [-69.75, -5.35], [-69.5, -5.25], [-68.97000000000003, -5.47], [-68.82, -5.82], [-68.47000000000003, -5.97], [-68.25, -6.5], [-68.35000000000002, -6.75], [-68.32, -6.82], [-67.97000000000003, -6.97], [-67.75, -7.5], [-67.85000000000002, -7.75], [-67.82, -7.82], [-67.75, -7.85], [-67.5, -7.75], [-66.97000000000003, -7.97], [-66.75, -8.5], [-66.97000000000003, -9.03], [-67.5, -9.25], [-67.75, -9.15], [-68.0, -9.25], [-68.25, -9.15], [-68.5, -9.25], [-68.75, -9.15], [-68.82, -9.18], [-68.97000000000003, -9.53], [-69.5, -9.75], [-69.75, -9.65], [-69.82, -9.68], [-69.97000000000003, -10.03], [-70.5, -10.25], [-70.75, -10.15], [-71.0, -10.25], [-71.25, -10.15], [-71.5, -10.25], [-71.75, -10.15], [-72.0, -10.25], [-72.52999999999997, -10.03], [-72.68, -9.68], [-73.02999999999997, -9.53], [-73.25, -9.0], [-73.14999999999998, -8.75], [-73.25, -8.5]]]]}, "2025-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.25, -8.5], [-73.04000000000002, -8.0], [-73.25, -7.5], [-73.14999999999998, -7.25], [-73.25, -7.0], [-73.02999999999997, -6.47], [-72.5, -6.25], [-72.25, -6.35], [-72.18, -6.32], [-72.02999999999997, -5.97], [-71.5, -5.75], [-71.25, -5.85], [-71.0, -5.75], [-70.75, -5.85], [-70.68, -5.82], [-70.52999999999997, -5.47], [-70.0, -5.25], [-69.75, -5.35], [-69.5, -5.25], [-68.97000000000003, -5.47], [-68.82, -5.82], [-68.47000000000003, -5.97], [-68.25, -6.5], [-68.35000000000002, -6.75], [-68.32, -6.82], [-67.97000000000003, -6.97], [-67.75, -7.5], [-67.85000000000002, -7.75], [-67.82, -7.82], [-67.75, -7.85], [-67.5, -7.75], [-66.97000000000003, -7.97], [-66.75, -8.5], [-66.97000000000003, -9.03], [-67.5, -9.25], [-67.75, -9.15], [-68.0, -9.25], [-68.25, -9.15], [-68.5, -9.25], [-68.75, -9.15], [-68.82, -9.18], [-68.97000000000003, -9.53], [-69.5, -9.75], [-69.75, -9.65], [-69.82, -9.68], [-69.97000000000003, -10.03], [-70.5, -10.25], [-70.75, -10.15], [-71.0, -10.25], [-71.25, -10.15], [-71.5, -10.25], [-71.75, -10.15], [-72.0, -10.25], [-72.52999999999997, -10.03], [-72.68, -9.68], [-73.02999999999997, -9.53], [-73.25, -9.0], [-73.14999999999998, -8.75], [-73.25, -8.5]]]]}, "2025-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.02999999999997, -7.47], [-70.5, -7.25], [-69.97000000000003, -7.47], [-69.75, -8.0], [-69.97000000000003, -8.53], [-70.5, -8.75], [-71.02999999999997, -8.53], [-71.25, -8.0], [-71.02999999999997, -7.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.064919773584734}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0069688308672027}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.955054589473832, 22.83847075953628, 23.799671866676988, 24.556170399983728]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.543982442220056, 21.151965077718103, 22.975459035237634, 24.556170399983728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5914729689964806, -2.7115015119893697, -1.7379879736723172, -0.9038909177564278]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.454710172578757, -4.064919773584734, -2.5604325610416367, -0.9038909177564278]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.01309467044087, -3.5787431392544837, -2.3296975886776243, -1.2335448723748457]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9189099605243243, -5.303574203949663, -3.541346244024019, -1.2335448723748457]}}