{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:17.374588", "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-13_to_2025-Dec-17_303.0_3.5"}, "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": 2025120000487}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 17 2025"}, "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": 74081.73280747695}, "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", "Guyana", "Suriname"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America", "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": 3.5}, "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": 303.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 303.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 4.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-60.68, 3.18], [-60.65, 3.25], [-60.75, 3.5], [-60.65, 3.75], [-60.75, 4.0], [-60.53, 4.53], [-60.0, 4.75], [-59.75, 4.65], [-59.5, 4.75], [-58.97, 4.53], [-58.82, 4.18], [-58.75, 4.15], [-58.5, 4.25], [-58.25, 4.15], [-58.0, 4.25], [-57.75, 4.15], [-57.5, 4.25], [-57.25, 4.15], [-57.0, 4.25], [-56.47, 4.03], [-56.25, 3.5], [-56.47, 2.97], [-56.82, 2.82], [-56.97, 2.47], [-57.32, 2.32], [-57.47, 1.97], [-58.0, 1.75], [-58.25, 1.85], [-58.32, 1.82], [-58.47, 1.47], [-59.0, 1.25], [-59.25, 1.35], [-59.5, 1.25], [-59.75, 1.35], [-60.0, 1.25], [-60.53, 1.47], [-60.68, 1.82], [-61.03, 1.97], [-61.25, 2.5], [-61.03, 3.03], [-60.68, 3.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.02999999999997, 1.97], [-61.25, 2.5], [-61.02999999999997, 3.03], [-60.68000000000001, 3.18], [-60.52999999999997, 3.53], [-60.0, 3.75], [-59.75, 3.65], [-59.68000000000001, 3.68], [-59.52999999999997, 4.03], [-59.0, 4.25], [-58.75, 4.15], [-58.5, 4.25], [-58.25, 4.15], [-58.0, 4.25], [-57.75, 4.15], [-57.5, 4.25], [-57.25, 4.15], [-57.0, 4.25], [-56.47000000000003, 4.03], [-56.25, 3.5], [-56.47000000000003, 2.97], [-56.81999999999999, 2.82], [-56.97000000000003, 2.47], [-57.31999999999999, 2.32], [-57.47000000000003, 1.97], [-58.0, 1.75], [-58.25, 1.85], [-58.31999999999999, 1.82], [-58.47000000000003, 1.47], [-59.0, 1.25], [-59.25, 1.35], [-59.5, 1.25], [-59.75, 1.35], [-60.0, 1.25], [-60.52999999999997, 1.47], [-60.68000000000001, 1.82], [-61.02999999999997, 1.97]]]]}, "2025-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.02999999999997, 1.97], [-61.25, 2.5], [-61.02999999999997, 3.03], [-60.68000000000001, 3.18], [-60.64999999999998, 3.25], [-60.75, 3.5], [-60.64999999999998, 3.75], [-60.75, 4.0], [-60.52999999999997, 4.53], [-60.0, 4.75], [-59.75, 4.65], [-59.5, 4.75], [-58.97000000000003, 4.53], [-58.81999999999999, 4.18], [-58.75, 4.15], [-58.5, 4.25], [-58.25, 4.15], [-58.0, 4.25], [-57.75, 4.15], [-57.5, 4.25], [-57.25, 4.15], [-57.0, 4.25], [-56.47000000000003, 4.03], [-56.25, 3.5], [-56.47000000000003, 2.97], [-56.81999999999999, 2.82], [-56.97000000000003, 2.47], [-57.31999999999999, 2.32], [-57.47000000000003, 1.97], [-58.0, 1.75], [-58.25, 1.85], [-58.31999999999999, 1.82], [-58.47000000000003, 1.47], [-59.0, 1.25], [-59.25, 1.35], [-59.5, 1.25], [-59.75, 1.35], [-60.0, 1.25], [-60.52999999999997, 1.47], [-60.68000000000001, 1.82], [-61.02999999999997, 1.97]]]]}, "2025-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.02999999999997, 1.97], [-61.25, 2.5], [-61.02999999999997, 3.03], [-60.68000000000001, 3.18], [-60.64999999999998, 3.25], [-60.75, 3.5], [-60.64999999999998, 3.75], [-60.75, 4.0], [-60.52999999999997, 4.53], [-60.0, 4.75], [-59.75, 4.65], [-59.5, 4.75], [-58.97000000000003, 4.53], [-58.81999999999999, 4.18], [-58.75, 4.15], [-58.5, 4.25], [-58.25, 4.15], [-58.0, 4.25], [-57.75, 4.15], [-57.5, 4.25], [-57.25, 4.15], [-57.0, 4.25], [-56.47000000000003, 4.03], [-56.25, 3.5], [-56.47000000000003, 2.97], [-56.81999999999999, 2.82], [-56.97000000000003, 2.47], [-57.31999999999999, 2.32], [-57.47000000000003, 1.97], [-58.0, 1.75], [-58.25, 1.85], [-58.31999999999999, 1.82], [-58.47000000000003, 1.47], [-59.0, 1.25], [-59.25, 1.35], [-59.5, 1.25], [-59.75, 1.35], [-60.0, 1.25], [-60.52999999999997, 1.47], [-60.68000000000001, 1.82], [-61.02999999999997, 1.97]]]]}, "2025-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.64999999999998, 3.75], [-60.75, 4.0], [-60.52999999999997, 4.53], [-60.0, 4.75], [-59.75, 4.65], [-59.5, 4.75], [-58.97000000000003, 4.53], [-58.81999999999999, 4.18], [-58.47000000000003, 4.03], [-58.25, 3.5], [-58.47000000000003, 2.97], [-59.0, 2.75], [-59.25, 2.85], [-59.31999999999999, 2.82], [-59.47000000000003, 2.47], [-60.0, 2.25], [-60.52999999999997, 2.47], [-60.75, 3.0], [-60.64999999999998, 3.25], [-60.75, 3.5], [-60.64999999999998, 3.75]]], [[[-57.0, 2.75], [-57.52999999999997, 2.97], [-57.75, 3.5], [-57.52999999999997, 4.03], [-57.0, 4.25], [-56.47000000000003, 4.03], [-56.25, 3.5], [-56.47000000000003, 2.97], [-57.0, 2.75]]]]}, "2025-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.52999999999997, 4.03], [-57.0, 4.25], [-56.47000000000003, 4.03], [-56.25, 3.5], [-56.47000000000003, 2.97], [-57.0, 2.75], [-57.52999999999997, 2.97], [-57.75, 3.5], [-57.52999999999997, 4.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9525047863324403}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.826409309562353}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.64543075561528, 24.806757863362634, 24.80680787828237, 25.34776967366537, 23.90156707763674]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.593261973063193, 23.57761154174807, 23.721199289957724, 24.650422668457054, 23.90156707763674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8083870084518252, -1.8232154970828987, -1.7846014175322626, -1.9700233934142375, -2.261597653038791]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2817924328194863, -2.460082784682072, -2.2201004620356457, -2.9525047863324403, -2.261597653038791]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0058031637350124, -1.9258412113334122, -1.8776056952961901, -1.9662418890503368, -2.1635201267824073]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.610411893776568, -2.4624656108982226, -2.259693287944755, -2.7026553207791504, -2.1635201267824073]}}