{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:00.016393", "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-21_to_2025-Aug-27_310.0_-12.0"}, "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": 2025080000736}, "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 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 27 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": 90646.35145836133}, "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": -12.0}, "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": 310.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "310.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 309.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-51.03, -11.47], [-50.68, -11.32], [-50.53, -10.97], [-50.18, -10.82], [-50.03, -10.47], [-49.5, -10.25], [-49.25, -10.35], [-49.0, -10.25], [-48.75, -10.35], [-48.5, -10.25], [-48.25, -10.35], [-48.0, -10.25], [-47.47, -10.47], [-47.32, -10.82], [-46.97, -10.97], [-46.82, -11.32], [-46.47, -11.47], [-46.25, -12.0], [-46.47, -12.53], [-46.82, -12.68], [-46.97, -13.03], [-47.5, -13.25], [-47.75, -13.15], [-48.0, -13.25], [-48.25, -13.15], [-48.37, -13.2], [-48.25, -13.5], [-48.47, -14.03], [-49.0, -14.25], [-49.3, -14.12], [-49.47, -14.53], [-50.0, -14.75], [-50.53, -14.53], [-50.68, -14.18], [-51.03, -14.03], [-51.25, -13.5], [-51.15, -13.25], [-51.25, -13.0], [-51.04, -12.5], [-51.25, -12.0], [-51.03, -11.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America", "South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.75, -13.5], 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"MultiPolygon", "coordinates": [[[[-51.25, -13.0], [-51.04000000000002, -12.5], [-51.25, -12.0], [-51.02999999999997, -11.47], [-50.68000000000001, -11.32], [-50.52999999999997, -10.97], [-50.18000000000001, -10.82], [-50.02999999999997, -10.47], [-49.5, -10.25], [-49.25, -10.35], [-49.0, -10.25], [-48.75, -10.35], [-48.5, -10.25], [-48.25, -10.35], [-48.0, -10.25], [-47.47000000000003, -10.47], [-47.31999999999999, -10.82], [-46.97000000000003, -10.97], [-46.81999999999999, -11.32], [-46.47000000000003, -11.47], [-46.25, -12.0], [-46.47000000000003, -12.53], [-46.81999999999999, -12.68], [-46.97000000000003, -13.03], [-47.5, -13.25], [-47.75, -13.15], [-48.0, -13.25], [-48.25, -13.15], [-48.370000000000005, -13.2], [-48.25, -13.5], [-48.47000000000003, -14.03], [-49.0, -14.25], [-49.30000000000001, -14.12], [-49.47000000000003, -14.53], [-50.0, -14.75], [-50.52999999999997, -14.53], [-50.68000000000001, -14.18], [-51.02999999999997, -14.03], [-51.25, -13.5], [-51.14999999999998, 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"value": -1.891549681788806}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.297708742118175, 25.795881652832065, 26.4532304551866, 26.912781298602056, 27.250691986084007, 27.63849029541018, 27.64039255777999]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.089851633707724, 24.84386342366537, 25.637195841471396, 25.89201126098635, 26.659302012125693, 27.63849029541018, 27.64039255777999]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.631051695177908, -2.3582597741237312, -1.8664591721162576, -1.6868670916137836, -1.7475463849838075, -1.4964125962156345, -1.6278744076003022]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.129138634591243, -2.9202481841076064, -2.4162414363951257, -2.2885145081481824, -2.017198652714683, -1.4964125962156345, -1.6278744076003022]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.621885436029884, -2.351518175842564, -1.8640055220670726, -1.7058554144408835, -1.7552444182934885, -1.5146946416012943, -1.6277244723759579]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0657307672143848, -2.8561017905040775, -2.527664358991385, -2.3895071613656995, -2.060566443254276, -1.5146946416012943, -1.6277244723759579]}}