{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:21.074364", "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": "2026-Feb-26_to_2026-Mar-02_310.5_-2.0"}, "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": 2026020000663}, "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": "February 26 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 02 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 98803.29346003533}, "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": -2.0}, "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": 310.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "310.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 309.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 314.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -4.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -0.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-50.53, -0.97], [-50.0, -0.75], [-49.75, -0.85], [-49.68, -0.82], [-49.53, -0.47], [-49.0, -0.25], [-48.47, -0.47], [-48.32, -0.82], [-47.97, -0.97], [-47.8, -1.38], [-47.5, -1.25], [-47.25, -1.35], [-47.0, -1.25], [-46.75, -1.35], [-46.5, -1.25], [-46.25, -1.35], [-46.0, -1.25], [-45.47, -1.47], [-45.32, -1.82], [-44.97, -1.97], [-44.75, -2.5], [-44.97, -3.03], [-45.5, -3.25], [-45.75, -3.15], [-45.82, -3.18], [-45.97, -3.53], [-46.5, -3.75], [-46.75, -3.65], [-47.0, -3.75], [-47.25, -3.65], [-47.5, -3.75], [-48.0, -3.54], [-48.32, -3.68], [-48.35, -3.75], [-48.25, -4.0], [-48.47, -4.53], [-49.0, -4.75], [-49.25, -4.65], [-49.5, -4.75], [-49.75, -4.65], [-50.0, -4.75], [-50.53, -4.53], [-50.75, -4.0], [-50.65, -3.75], [-50.68, -3.68], [-51.03, -3.53], [-51.25, -3.0], [-51.15, -2.75], [-51.25, -2.5], [-51.15, -2.25], [-51.25, -2.0], [-51.03, -1.47], [-50.68, -1.32], [-50.53, -0.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.02999999999997, -3.53], [-51.25, -3.0], [-51.02999999999997, -2.47], [-50.620000000000005, -2.3], [-50.75, -2.0], [-50.64999999999998, -1.75], [-50.75, -1.5], [-50.52999999999997, -0.97], [-50.0, -0.75], [-49.75, -0.85], [-49.68000000000001, -0.82], [-49.52999999999997, -0.47], [-49.0, -0.25], [-48.47000000000003, -0.47], [-48.25, -1.0], [-48.47000000000003, -1.53], [-48.81999999999999, -1.68], [-48.85000000000002, -1.75], [-48.75, -2.0], [-48.870000000000005, -2.3], [-48.47000000000003, -2.47], [-48.25, -3.0], [-48.35000000000002, -3.25], [-48.25, -3.5], [-48.35000000000002, -3.75], [-48.25, -4.0], [-48.47000000000003, -4.53], [-49.0, -4.75], [-49.25, -4.65], [-49.5, -4.75], [-49.75, -4.65], [-50.0, -4.75], [-50.52999999999997, -4.53], [-50.75, -4.0], [-50.64999999999998, -3.75], [-50.68000000000001, -3.68], [-51.02999999999997, 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{"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4332968215344408, -1.539549842915827, -2.2676641545239473, -1.348855877163885, -1.346176419892501]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6228027530817712, -2.002865908286992, -3.0669046646876836, -1.749715068130854, -1.6279752859770724]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4615866120820447, -1.5980247859440688, -2.3096330728097008, -1.3747286535554903, -1.4531600278679107]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5958693166235176, -2.392833553470284, -2.8394822217077564, -1.7311198738980642, 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