{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:31.624616", "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-Feb-25_to_2025-Feb-27_282.0_-46.5"}, "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": 2025020000535}, "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 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 147020.72945220064}, "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": ["Chile"]}, "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": ["Pacific 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": -46.5}, "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": 282.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 278.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -48.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -46.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-82.0, -45.75], [-81.75, -45.85], [-81.5, -45.75], [-81.25, -45.85], [-81.0, -45.75], [-80.75, -45.85], [-80.68, -45.82], [-80.53, -45.47], [-80.0, -45.25], [-79.75, -45.35], [-79.5, -45.25], [-79.25, -45.35], [-79.0, -45.25], [-78.75, -45.35], [-78.5, -45.25], [-78.25, -45.35], [-78.0, -45.25], [-77.75, -45.35], [-77.5, -45.25], [-77.25, -45.35], [-77.0, -45.25], [-76.75, -45.35], [-76.5, -45.25], [-76.25, -45.35], [-76.0, -45.25], [-75.47, -45.47], [-75.32, -45.82], [-74.97, -45.97], [-74.82, -46.32], [-74.47, -46.47], [-74.25, -47.0], [-74.35, -47.25], [-74.25, -47.5], [-74.47, -48.03], [-74.82, -48.18], [-74.85, -48.25], [-74.75, -48.5], [-74.97, -49.03], [-75.5, -49.25], [-75.75, -49.15], [-76.0, -49.25], [-76.25, -49.15], [-76.5, -49.25], [-76.75, -49.15], [-77.0, -49.25], [-77.25, -49.15], [-77.5, -49.25], [-77.75, -49.15], [-78.0, -49.25], [-78.25, -49.15], [-78.5, -49.25], [-78.75, -49.15], [-79.0, -49.25], [-79.53, -49.03], [-79.68, -48.68], [-79.75, -48.65], [-80.0, -48.75], [-80.25, -48.65], [-80.5, -48.75], [-81.03, -48.53], [-81.18, -48.18], [-81.53, -48.03], [-81.68, -47.68], [-81.75, -47.65], [-82.0, -47.75], [-82.53, -47.53], [-82.75, -47.0], [-82.65, -46.75], [-82.75, -46.5], [-82.53, -45.97], [-82.0, -45.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.W.South-America", "S.South-America", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.75, -46.5], [-82.52999999999997, -45.97], [-82.0, -45.75], [-81.75, -45.85], [-81.5, -45.75], [-81.25, -45.85], [-81.0, -45.75], [-80.75, -45.85], [-80.68, -45.82], [-80.52999999999997, -45.47], [-80.0, -45.25], [-79.75, -45.35], [-79.5, -45.25], [-79.25, -45.35], [-79.0, -45.25], [-78.75, -45.35], [-78.5, -45.25], [-78.25, -45.35], [-78.0, -45.25], [-77.75, -45.35], [-77.5, -45.25], [-77.25, -45.35], [-77.0, -45.25], [-76.75, -45.35], [-76.5, -45.25], [-76.25, -45.35], [-76.0, -45.25], [-75.47000000000003, -45.47], [-75.32, -45.82], [-74.97000000000003, -45.97], [-74.82, -46.32], [-74.47000000000003, -46.47], [-74.25, -47.0], [-74.35000000000002, -47.25], [-74.25, -47.5], [-74.47000000000003, -48.03], [-74.82, -48.18], [-74.85000000000002, -48.25], [-74.75, -48.5], [-74.97000000000003, -49.03], [-75.5, -49.25], [-75.75, -49.15], [-76.0, -49.25], [-76.25, -49.15], [-76.5, -49.25], [-76.75, -49.15], [-77.0, -49.25], [-77.25, -49.15], [-77.5, -49.25], [-77.75, -49.15], [-78.0, -49.25], [-78.25, -49.15], [-78.5, -49.25], [-78.75, -49.15], [-79.0, -49.25], [-79.52999999999997, -49.03], [-79.68, -48.68], [-79.75, -48.65], [-80.0, -48.75], [-80.25, -48.65], [-80.5, -48.75], [-81.02999999999997, -48.53], [-81.18, -48.18], [-81.52999999999997, -48.03], [-81.68, -47.68], [-81.75, -47.65], [-82.0, -47.75], [-82.52999999999997, -47.53], [-82.75, -47.0], [-82.64999999999998, -46.75], [-82.75, -46.5]]]]}, "2025-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.75, -46.5], [-82.52999999999997, -45.97], [-82.0, -45.75], [-81.75, -45.85], [-81.5, -45.75], [-81.25, -45.85], [-81.0, -45.75], [-80.75, -45.85], [-80.68, -45.82], [-80.52999999999997, -45.47], [-80.0, -45.25], [-79.75, -45.35], [-79.5, -45.25], [-79.25, -45.35], [-79.0, -45.25], [-78.75, -45.35], [-78.5, -45.25], [-78.25, -45.35], [-78.0, -45.25], [-77.75, -45.35], [-77.5, -45.25], [-77.25, -45.35], [-77.0, -45.25], [-76.75, -45.35], [-76.5, -45.25], [-76.25, -45.35], [-76.0, -45.25], [-75.47000000000003, -45.47], [-75.32, -45.82], [-74.97000000000003, -45.97], [-74.82, -46.32], [-74.47000000000003, -46.47], [-74.25, -47.0], [-74.35000000000002, -47.25], [-74.25, -47.5], [-74.47000000000003, -48.03], [-74.82, -48.18], [-74.85000000000002, -48.25], [-74.75, -48.5], [-74.97000000000003, -49.03], [-75.5, -49.25], [-75.75, -49.15], [-76.0, -49.25], [-76.25, -49.15], [-76.5, -49.25], [-76.75, -49.15], [-77.0, -49.25], [-77.25, -49.15], [-77.5, -49.25], [-77.75, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1225505401178566}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1569118214066463}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.648647017706082, 9.644056483677446, 9.8745832534064]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.073812103271507, 8.32952779134115, 9.200498199462913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.211443396205331, -2.233211275674814, -2.0260807923397945]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1225505401178566, -2.8520557758847644, -2.6424371704600844]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8247700443658115, -1.8624697364292968, -1.6982818230703376]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1835860458066207, -2.293725818803381, -2.187171965400655]}}