{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:03.984678", "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-Aug-31_to_2025-Sep-06_323.0_-6.5"}, "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": 2025080000965}, "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": "August 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 06 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 125753.69228983337}, "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": ["Atlantic Ocean"]}, "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": -6.5}, "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": 323.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "323.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 321.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 325.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -5.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-39.18, -7.32], [-39.15, -7.25], [-39.25, -7.0], [-39.15, -6.75], [-39.25, -6.5], [-39.03, -5.97], [-38.68, -5.82], [-38.53, -5.47], [-38.18, -5.32], [-38.03, -4.97], [-37.5, -4.75], [-37.25, -4.85], [-37.0, -4.75], [-36.75, -4.85], [-36.5, -4.75], [-36.0, -4.96], [-35.5, -4.75], [-34.97, -4.97], [-34.75, -5.5], [-34.96, -6.0], [-34.75, -6.5], [-34.87, -6.8], [-34.47, -6.97], [-34.25, -7.5], [-34.35, -7.75], [-34.25, -8.0], [-34.47, -8.53], [-35.0, -8.75], [-35.25, -8.65], [-35.5, -8.75], [-36.0, -8.54], [-36.32, -8.68], [-36.47, -9.03], [-37.0, -9.25], [-37.25, -9.15], [-37.5, -9.25], [-37.75, -9.15], [-38.0, -9.25], [-38.25, -9.15], [-38.5, -9.25], [-39.03, -9.03], [-39.18, -8.68], [-39.53, -8.53], [-39.75, -8.0], [-39.53, -7.47], [-39.18, -7.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.75, -6.5], 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20.3065010070801, 26.5529609680176]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9540751451921048, -1.0196058332677524, -0.9154441624477537, -1.4665060145645268, -1.8431520980111822, -1.8019550276434808, -1.0944531211274438]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.114129270536182, -1.2822582162207254, -1.2027751879822972, -2.242671622181774, -2.5703407533575273, -3.6232068376713187, -1.1282434831634305]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6087757262066187, -1.6742770061498824, -1.4630405513941571, -1.9192538562714119, -2.406368016861136, -2.054971682578568, -1.6398975745979498]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.060355062511097, -1.9998062540636046, -1.9008130475746585, -2.5839207524584062, -3.428893805230902, -3.2532397914004907, -1.7972453155619728]}}