{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:09.361174", "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-05_to_2025-Dec-08_316.5_-9.5"}, "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": 2025120000256}, "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 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 08 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": 82190.42812096135}, "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": -9.5}, "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": 316.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "316.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 314.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 317.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -12.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-46.15, -8.25], [-46.25, -8.0], [-46.15, -7.75], [-46.25, -7.5], [-46.03, -6.97], [-45.5, -6.75], [-44.97, -6.97], [-44.82, -7.32], [-44.47, -7.47], [-44.32, -7.82], [-43.97, -7.97], [-43.8, -8.38], [-43.5, -8.25], [-42.97, -8.47], [-42.82, -8.82], [-42.47, -8.97], [-42.25, -9.5], [-42.47, -10.03], [-42.82, -10.18], [-42.85, -10.25], [-42.75, -10.5], [-42.87, -10.8], [-42.47, -10.97], [-42.25, -11.5], [-42.35, -11.75], [-42.25, -12.0], [-42.47, -12.53], [-43.0, -12.75], [-43.53, -12.53], [-43.68, -12.18], [-43.75, -12.15], [-44.0, -12.25], [-44.25, -12.15], [-44.5, -12.25], [-44.75, -12.15], [-45.0, -12.25], [-45.53, -12.03], [-45.75, -11.5], [-45.53, -10.97], [-45.18, -10.82], [-45.15, -10.75], [-45.18, -10.68], [-45.53, -10.53], [-45.68, -10.18], [-46.03, -10.03], [-46.25, -9.5], [-46.15, -9.25], [-46.25, -9.0], [-46.15, -8.75], [-46.25, -8.5], [-46.15, -8.25]], [[-44.85, -9.25], [-44.82, -9.32], [-44.75, -9.35], [-44.68, -9.32], [-44.62, -9.2], [-44.75, -9.15], [-44.82, -9.18], [-44.85, -9.25]]]]}}, "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": {"2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.25, -9.0], [-46.14999999999998, -8.75], [-46.25, -8.5], [-46.14999999999998, -8.25], [-46.25, -8.0], [-46.14999999999998, -7.75], [-46.25, -7.5], [-46.02999999999997, -6.97], [-45.5, -6.75], [-44.97000000000003, -6.97], [-44.81999999999999, -7.32], [-44.47000000000003, -7.47], [-44.31999999999999, -7.82], [-43.97000000000003, -7.97], [-43.80000000000001, -8.38], [-43.5, -8.25], [-42.97000000000003, -8.47], [-42.81999999999999, -8.82], [-42.47000000000003, -8.97], [-42.25, -9.5], [-42.47000000000003, -10.03], [-42.81999999999999, -10.18], [-42.85000000000002, -10.25], [-42.75, -10.5], [-42.870000000000005, -10.8], [-42.47000000000003, -10.97], [-42.25, -11.5], [-42.35000000000002, -11.75], [-42.25, -12.0], [-42.47000000000003, -12.53], [-43.0, 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"anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.586412181832543, -3.9751708481823584, -3.770812601342925, -2.3374748904155354]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.675164577263612, -1.6408298933893146, -1.889307817144808, -1.4866839904408435]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.467440721612496, -2.3608242180018038, -2.5042951938870543, -1.4866839904408435]}}