{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:51.043249", "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-Nov-24_to_2025-Nov-27_313.5_-22.0"}, "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": 2025110000672}, "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 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 27 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": 51420.832950811964}, "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": -22.0}, "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": 313.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "313.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 312.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 314.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-46.0, -21.25], [-45.47, -21.47], [-45.32, -21.82], [-44.97, -21.97], [-44.75, -22.5], [-44.97, -23.03], [-45.32, -23.18], [-45.35, -23.25], [-45.25, -23.5], [-45.47, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.53, -24.03], [-47.75, -23.5], [-47.65, -23.25], [-47.68, -23.18], [-48.03, -23.03], [-48.25, -22.5], [-48.15, -22.25], [-48.25, -22.0], [-48.15, -21.75], [-48.25, -21.5], [-48.15, -21.25], [-48.25, -21.0], [-48.03, -20.47], [-47.5, -20.25], [-46.97, -20.47], [-46.82, -20.82], [-46.47, -20.97], [-46.32, -21.32], [-46.25, -21.35], [-46.0, -21.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -22.0], [-48.14999999999998, -21.75], [-48.25, -21.5], [-48.14999999999998, -21.25], [-48.25, -21.0], [-48.02999999999997, -20.47], [-47.5, -20.25], [-46.97000000000003, -20.47], [-46.81999999999999, -20.82], [-46.47000000000003, -20.97], [-46.31999999999999, -21.32], [-46.25, -21.35], [-46.0, -21.25], [-45.47000000000003, -21.47], [-45.31999999999999, -21.82], [-44.97000000000003, -21.97], [-44.75, -22.5], [-44.97000000000003, -23.03], [-45.5, -23.25], [-45.75, -23.15], [-46.0, -23.25], [-46.25, -23.15], [-46.31999999999999, -23.18], [-46.47000000000003, -23.53], [-47.0, -23.75], [-47.52999999999997, -23.53], [-47.68000000000001, -23.18], [-48.02999999999997, -23.03], [-48.25, -22.5], [-48.14999999999998, -22.25], [-48.25, -22.0]]]]}, "2025-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -22.0], [-48.14999999999998, -21.75], [-48.25, -21.5], [-48.14999999999998, -21.25], [-48.25, -21.0], [-48.02999999999997, -20.47], [-47.5, -20.25], [-46.97000000000003, -20.47], [-46.81999999999999, -20.82], [-46.47000000000003, -20.97], [-46.31999999999999, -21.32], [-46.25, -21.35], [-46.0, -21.25], [-45.47000000000003, -21.47], [-45.31999999999999, -21.82], [-44.97000000000003, -21.97], [-44.75, -22.5], [-44.97000000000003, -23.03], [-45.31999999999999, -23.18], [-45.35000000000002, -23.25], [-45.25, -23.5], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.64999999999998, -23.25], [-47.68000000000001, -23.18], [-48.02999999999997, -23.03], [-48.25, -22.5], [-48.14999999999998, -22.25], [-48.25, -22.0]]]]}, "2025-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -22.0], [-48.14999999999998, -21.75], [-48.25, -21.5], [-48.14999999999998, -21.25], [-48.25, -21.0], [-48.02999999999997, -20.47], [-47.5, -20.25], [-46.97000000000003, -20.47], [-46.81999999999999, -20.82], [-46.47000000000003, -20.97], [-46.31999999999999, -21.32], [-46.25, -21.35], [-46.0, -21.25], [-45.47000000000003, -21.47], [-45.31999999999999, -21.82], [-44.97000000000003, -21.97], [-44.75, -22.5], [-44.97000000000003, -23.03], [-45.31999999999999, -23.18], [-45.35000000000002, -23.25], [-45.25, -23.5], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.64999999999998, -23.25], [-47.68000000000001, -23.18], [-48.02999999999997, -23.03], [-48.25, -22.5], [-48.14999999999998, -22.25], [-48.25, -22.0]]]]}, "2025-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.25, -22.0], [-48.02999999999997, -21.47], [-47.5, -21.25], [-47.25, -21.35], [-47.0, -21.25], [-46.75, -21.35], [-46.5, -21.25], [-45.97000000000003, -21.47], [-45.81999999999999, -21.82], [-45.47000000000003, -21.97], [-45.25, -22.5], [-45.35000000000002, -22.75], [-45.25, -23.0], [-45.35000000000002, -23.25], [-45.25, -23.5], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.64999999999998, -23.25], [-47.68000000000001, -23.18], [-48.02999999999997, -23.03], [-48.25, -22.5], [-48.14999999999998, -22.25], [-48.25, -22.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8504903470457066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8552458796580726}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.053258025340483, 19.18434436939384, 19.490405301694523, 19.316900556515463]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.87939860026046, 17.33875427246096, 16.971873219807946, 17.39661560058596]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2827798973929267, -2.8571331250690326, -2.609869055443937, -2.764851278727616]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.739923555789062, -3.523403111328264, -3.107666672783637, -3.8504903470457066]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.162699400230998, -1.8446339660627449, -1.6964223491236416, -1.7474197392117017]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.685118542898646, -2.3948389291033094, -2.09860778582012, -2.0881114387367115]}}