{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-31 16:20:34.410304", "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-Aug-21_to_2026-Aug-23_312.0_-51.5"}, "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": 2026080000558}, "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": true}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 21 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 23 2026"}, "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": 57879.125069682275}, "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": []}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Atlantic-Ocean", "Southern-Ocean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": []}, "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": ["South 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": -51.5}, "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": 312.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 310.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 315.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -54.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -51.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.03, -51.97], [-49.5, -51.75], [-48.97, -51.97], 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"2026-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.03, -51.97], [-49.5, -51.75], [-48.97, -51.97], [-48.82, -52.32], [-48.75, -52.35], [-48.68, -52.32], [-48.65, -52.25], [-48.75, -52.0], [-48.65, -51.75], [-48.75, -51.5], [-48.53, -50.97], [-48.0, -50.75], [-47.75, -50.85], [-47.5, -50.75], [-47.25, -50.85], [-47.0, -50.75], [-46.47, -50.97], [-46.25, -51.5], [-46.35, -51.75], [-46.32, -51.82], [-46.25, -51.85], [-46.0, -51.75], [-45.47, -51.97], [-45.32, -52.32], [-45.25, -52.35], [-45.0, -52.25], [-44.47, -52.47], [-44.25, -53.0], [-44.47, -53.53], [-45.0, -53.75], [-45.25, -53.65], [-45.32, -53.68], [-45.47, -54.03], [-46.0, -54.25], [-46.25, -54.15], [-46.5, -54.25], [-46.75, -54.15], [-47.0, -54.25], [-47.25, -54.15], [-47.5, -54.25], [-47.75, -54.15], [-47.82, -54.18], [-47.97, -54.53], [-48.5, -54.75], [-48.75, -54.65], [-49.0, -54.75], [-49.53, -54.53], [-49.75, -54.0], [-49.65, -53.75], [-49.68, -53.68], [-50.03, -53.53], [-50.25, -53.0], [-50.15, -52.75], [-50.25, -52.5], [-50.03, -51.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.894211666253739}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.4012062589767633}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.7988344746250959, -1.5500457845707842, -2.3230223214754346]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.5945622762043854, -2.6917366027831804, -3.210502370198526]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6486818689648524, -3.3910882391077606, -4.163848668857677]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.193043974627358, -3.8875651389518566, -4.894211666253739]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5060759952063465, -1.9304586003252322, -2.3828149802469585]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6644804636857562, -2.1023844482661143, -2.623730106385588]}}