{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:54.411097", "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-04_to_2025-Dec-09_312.5_-17.0"}, "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": 2025120000224}, "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 04 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 09 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 50388.75639363314}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": -17.0}, "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": 312.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 311.75}, "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": -17.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.0, -16.25], [-44.47, -16.47], [-44.25, -17.0], [-44.47, -17.53], [-45.0, -17.75], [-45.53, -17.53], [-45.75, -17.0], [-45.53, -16.47], [-45.0, -16.25]]]]}, "2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.53, -15.47], [-46.0, -15.25], [-45.75, -15.35], [-45.5, -15.25], [-44.97, -15.47], [-44.75, -16.0], [-44.85, -16.25], [-44.82, -16.32], [-44.47, -16.47], [-44.25, -17.0], [-44.47, -17.53], [-45.0, -17.75], [-45.53, -17.53], [-45.68, -17.18], [-45.75, -17.15], [-46.0, -17.25], [-46.53, -17.03], [-46.75, -16.5], [-46.65, -16.25], [-46.75, -16.0], [-46.53, -15.47]]]]}, "2025-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.75, -16.5], [-48.53, -15.97], [-48.18, -15.82], [-48.15, -15.75], [-48.25, -15.5], [-48.15, -15.25], [-48.25, -15.0], [-48.03, -14.47], [-47.5, -14.25], [-46.97, -14.47], [-46.75, -15.0], [-46.85, -15.25], [-46.8, -15.38], [-46.5, -15.25], [-46.25, -15.35], [-46.0, -15.25], [-45.75, -15.35], [-45.5, -15.25], [-44.97, -15.47], [-44.75, -16.0], [-44.85, -16.25], [-44.82, -16.32], [-44.47, -16.47], [-44.25, -17.0], [-44.47, -17.53], [-45.0, -17.75], [-45.53, -17.53], [-45.68, -17.18], [-45.75, -17.15], [-46.0, -17.25], [-46.3, -17.12], [-46.47, -17.53], [-47.0, -17.75], [-47.25, -17.65], [-47.5, -17.75], [-48.03, -17.53], [-48.18, -17.18], [-48.53, -17.03], [-48.75, -16.5]]]]}, "2025-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, -16.75], [-48.75, -16.5], [-48.53, -15.97], [-48.18, -15.82], [-48.15, -15.75], [-48.25, -15.5], [-48.15, -15.25], [-48.25, -15.0], [-48.03, -14.47], [-47.5, -14.25], [-46.97, -14.47], [-46.75, -15.0], [-46.85, -15.25], [-46.8, -15.38], [-46.5, -15.25], [-46.25, -15.35], [-46.0, -15.25], [-45.75, -15.35], [-45.5, -15.25], [-44.97, -15.47], [-44.75, -16.0], [-44.85, -16.25], [-44.82, -16.32], [-44.47, -16.47], [-44.25, -17.0], [-44.47, -17.53], [-45.0, -17.75], [-45.53, -17.53], [-45.68, -17.18], [-45.75, -17.15], [-46.0, -17.25], [-46.3, -17.12], [-46.47, -17.53], [-46.82, -17.68], [-46.97, -18.03], [-47.5, -18.25], [-47.75, -18.15], [-48.0, -18.25], [-48.53, -18.03], [-48.75, -17.5], [-48.65, -17.25], [-48.75, -17.0], [-48.65, -16.75]]]]}, "2025-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, -16.75], [-48.75, -16.5], [-48.53, -15.97], [-48.18, -15.82], [-48.15, -15.75], [-48.25, -15.5], [-48.15, -15.25], [-48.25, -15.0], [-48.03, -14.47], [-47.5, -14.25], [-46.97, -14.47], [-46.75, -15.0], [-46.85, -15.25], [-46.8, -15.38], [-46.5, -15.25], [-45.97, -15.47], [-45.75, -16.0], [-45.97, -16.53], [-46.32, -16.68], [-46.35, -16.75], [-46.25, -17.0], [-46.47, -17.53], [-46.82, -17.68], [-46.97, -18.03], [-47.5, -18.25], [-47.75, -18.15], [-48.0, -18.25], [-48.53, -18.03], [-48.75, -17.5], [-48.65, -17.25], [-48.75, -17.0], [-48.65, -16.75]]]]}, "2025-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.65, -16.75], [-48.75, -16.5], [-48.53, -15.97], [-48.18, -15.82], [-48.15, -15.75], [-48.25, -15.5], [-48.15, -15.25], [-48.25, -15.0], [-48.03, -14.47], [-47.5, -14.25], [-46.97, -14.47], [-46.75, -15.0], [-46.85, -15.25], [-46.8, -15.38], [-46.5, -15.25], [-45.97, -15.47], [-45.75, -16.0], [-45.97, -16.53], [-46.32, -16.68], [-46.35, -16.75], [-46.25, -17.0], [-46.47, -17.53], [-46.82, -17.68], [-46.97, -18.03], [-47.5, -18.25], [-47.75, -18.15], [-48.0, -18.25], [-48.53, -18.03], [-48.75, -17.5], [-48.65, -17.25], [-48.75, -17.0], [-48.65, -16.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2446541335722827}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3880314672645095}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.62899297078451, 22.62856547037768, 21.280446443103585, 21.668515328800027, 20.77254935370553, 21.097252146403036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.62899297078451, 21.857390340169275, 20.07965240478518, 20.561289723714196, 19.88267033894857, 20.420921579996786]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2706824180597778, -2.2673143801996956, -2.602463882582579, -2.1443435263818875, -2.6076517151278438, -2.3235425248245414]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2706824180597778, -2.3703067566753475, -3.2446541335722827, -2.4911177888598104, -3.145347393673319, -2.6652856810046615]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.344184622922335, -1.358465720525368, -1.6655837561682756, -1.4028134229219986, -1.8072785067456474, -1.6012115475656479]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.344184622922335, -1.420871570281052, -2.027618844597599, -1.6530276793425807, -2.2411153363462684, -1.8110694653693098]}}