{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-28 16:19:51.476022", "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-May-09_to_2026-May-14_306.0_-43.0"}, "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": 2026050000269}, "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": "May 09 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 14 2026"}, "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": 348190.1378464028}, "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": ["Falkland Islands"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Atlantic-Ocean", "S.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": ["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": -43.0}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -54.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -42.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, -50.0], [-62.03, -49.47], [-61.5, -49.25], [-61.25, -49.35], [-61.18, -49.32], [-61.03, -48.97], [-60.5, -48.75], [-60.25, -48.85], [-60.18, -48.82], [-60.03, -48.47], [-59.5, -48.25], [-59.25, -48.35], [-59.0, -48.25], [-58.75, -48.35], [-58.5, -48.25], [-58.25, -48.35], [-58.0, -48.25], [-57.75, -48.35], [-57.68, -48.32], [-57.53, -47.97], [-57.0, -47.75], [-56.75, -47.85], [-56.68, -47.82], [-56.65, -47.75], [-56.75, -47.5], [-56.53, -46.97], [-56.18, -46.82], [-56.15, -46.75], [-56.25, -46.5], [-56.15, -46.25], [-56.25, -46.0], [-56.15, -45.75], [-56.25, -45.5], [-56.15, -45.25], [-56.25, -45.0], [-56.03, -44.47], [-55.68, -44.32], [-55.65, -44.25], [-55.75, -44.0], [-55.53, -43.47], [-55.18, -43.32], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25], [-53.75, -42.35], [-53.5, -42.25], [-52.97, -42.47], [-52.75, -43.0], [-52.97, -43.53], [-53.32, -43.68], [-53.35, -43.75], [-53.25, -44.0], [-53.35, -44.25], [-53.25, -44.5], [-53.35, -44.75], [-53.25, -45.0], [-53.35, -45.25], [-53.25, -45.5], [-53.35, -45.75], [-53.25, -46.0], [-53.35, -46.25], [-53.25, -46.5], [-53.35, -46.75], [-53.25, -47.0], [-53.35, -47.25], [-53.32, -47.32], [-52.97, -47.47], [-52.75, -48.0], [-52.97, -48.53], [-53.5, -48.75], [-53.75, -48.65], [-54.0, -48.75], [-54.25, -48.65], [-54.32, -48.68], [-54.35, -48.75], [-54.32, -48.82], [-53.97, -48.97], [-53.75, -49.5], [-53.85, -49.75], [-53.75, -50.0], [-53.97, -50.53], [-54.32, -50.68], [-54.46, -51.0], [-54.25, -51.5], [-54.35, -51.75], [-54.25, -52.0], [-54.35, -52.25], [-54.32, -52.32], [-53.97, -52.47], [-53.75, -53.0], [-53.85, -53.25], [-53.75, -53.5], [-53.97, -54.03], [-54.32, -54.18], [-54.47, -54.53], [-55.0, -54.75], [-55.25, -54.65], [-55.32, -54.68], [-55.47, -55.03], [-56.0, -55.25], [-56.53, -55.03], [-56.68, -54.68], [-57.03, -54.53], [-57.25, -54.0], [-57.15, -53.75], [-57.18, -53.68], [-57.53, -53.53], [-57.68, -53.18], [-57.75, -53.15], [-58.0, -53.25], [-58.25, -53.15], [-58.32, -53.18], [-58.47, -53.53], [-59.0, -53.75], [-59.25, -53.65], [-59.5, -53.75], [-60.03, -53.53], [-60.25, -53.0], [-60.15, -52.75], [-60.18, -52.68], [-60.25, -52.65], [-60.5, -52.75], [-61.03, -52.53], [-61.25, -52.0], [-61.15, -51.75], [-61.18, -51.68], [-61.53, -51.53], [-61.75, -51.0], [-61.65, -50.75], [-61.68, -50.68], [-62.03, -50.53], [-62.25, -50.0]]]]}, "2026-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, -50.0], [-62.03, -49.47], [-61.5, -49.25], [-61.25, -49.35], [-61.18, -49.32], [-61.03, -48.97], [-60.5, -48.75], [-60.25, -48.85], [-60.18, -48.82], [-60.03, -48.47], [-59.5, -48.25], [-59.25, -48.35], [-59.0, -48.25], [-58.75, -48.35], [-58.5, -48.25], [-58.25, -48.35], [-58.0, -48.25], [-57.75, -48.35], [-57.68, -48.32], [-57.53, -47.97], [-57.0, -47.75], [-56.75, -47.85], [-56.68, -47.82], [-56.65, -47.75], [-56.75, -47.5], [-56.53, -46.97], [-56.18, -46.82], [-56.15, -46.75], [-56.25, -46.5], [-56.15, -46.25], [-56.25, -46.0], [-56.15, -45.75], [-56.25, -45.5], [-56.15, -45.25], [-56.25, -45.0], [-56.03, -44.47], [-55.68, -44.32], [-55.65, -44.25], [-55.75, -44.0], [-55.53, -43.47], [-55.18, -43.32], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25], [-53.75, -42.35], [-53.68, -42.32], [-53.53, -41.97], [-53.0, -41.75], [-52.75, -41.85], [-52.5, -41.75], [-51.97, -41.97], [-51.75, -42.5], [-51.97, -43.03], [-52.32, -43.18], [-52.47, -43.53], [-52.82, -43.68], [-52.85, -43.75], [-52.75, -44.0], [-52.85, -44.25], [-52.82, -44.32], [-52.47, -44.47], [-52.25, -45.0], [-52.35, -45.25], [-52.25, -45.5], [-52.47, -46.03], [-52.82, -46.18], [-52.96, -46.5], [-52.82, -46.82], [-52.47, -46.97], [-52.25, -47.5], [-52.35, -47.75], [-52.25, -48.0], [-52.47, -48.53], [-53.0, -48.75], [-53.25, -48.65], [-53.5, -48.75], [-53.75, -48.65], [-53.87, -48.7], [-53.82, -48.82], [-53.47, -48.97], [-53.25, -49.5], [-53.47, -50.03], [-53.82, -50.18], [-53.97, -50.53], [-54.32, -50.68], [-54.46, -51.0], [-54.25, -51.5], [-54.35, -51.75], [-54.25, -52.0], [-54.35, -52.25], [-54.32, -52.32], [-53.97, -52.47], [-53.75, -53.0], [-53.85, -53.25], [-53.75, -53.5], [-53.97, -54.03], [-54.32, -54.18], [-54.47, -54.53], [-55.0, -54.75], [-55.25, -54.65], [-55.32, -54.68], [-55.47, -55.03], [-56.0, -55.25], [-56.53, -55.03], [-56.68, -54.68], [-57.03, -54.53], [-57.25, -54.0], [-57.15, -53.75], [-57.18, -53.68], [-57.53, -53.53], [-57.68, -53.18], [-57.75, -53.15], [-58.0, -53.25], [-58.25, -53.15], [-58.32, -53.18], [-58.47, -53.53], [-59.0, -53.75], [-59.25, -53.65], [-59.5, -53.75], [-60.03, -53.53], [-60.25, -53.0], [-60.15, -52.75], [-60.18, -52.68], [-60.25, -52.65], [-60.5, -52.75], [-61.03, -52.53], [-61.25, -52.0], [-61.15, -51.75], [-61.18, -51.68], [-61.53, -51.53], [-61.75, -51.0], [-61.65, -50.75], [-61.68, -50.68], [-62.03, -50.53], [-62.25, -50.0]]]]}, "2026-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, -50.0], [-62.03, -49.47], [-61.5, -49.25], [-61.25, -49.35], [-61.18, -49.32], [-61.03, -48.97], [-60.5, -48.75], [-60.25, -48.85], [-60.18, -48.82], [-60.03, -48.47], [-59.5, -48.25], [-59.25, -48.35], [-59.0, -48.25], [-58.75, -48.35], [-58.5, -48.25], [-58.25, -48.35], [-58.0, -48.25], [-57.75, -48.35], [-57.68, -48.32], [-57.53, -47.97], [-57.0, -47.75], [-56.75, -47.85], [-56.68, -47.82], [-56.65, -47.75], [-56.75, -47.5], [-56.53, -46.97], [-56.18, -46.82], [-56.15, -46.75], [-56.25, -46.5], [-56.15, -46.25], [-56.25, -46.0], [-56.15, -45.75], [-56.25, -45.5], [-56.15, -45.25], [-56.25, -45.0], [-56.03, -44.47], [-55.68, -44.32], [-55.65, -44.25], [-55.75, -44.0], [-55.53, -43.47], [-55.18, -43.32], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25], [-53.75, -42.35], [-53.68, -42.32], [-53.53, -41.97], [-53.0, -41.75], [-52.75, -41.85], [-52.5, -41.75], [-51.97, -41.97], [-51.75, -42.5], [-51.97, -43.03], [-52.32, -43.18], [-52.47, -43.53], [-52.82, -43.68], [-52.85, -43.75], [-52.75, -44.0], [-52.85, -44.25], [-52.82, -44.32], [-52.47, -44.47], [-52.25, -45.0], [-52.35, -45.25], [-52.25, -45.5], [-52.47, -46.03], [-52.82, -46.18], [-52.96, -46.5], [-52.82, -46.82], [-52.47, -46.97], [-52.25, -47.5], [-52.35, -47.75], [-52.25, -48.0], [-52.47, -48.53], [-53.0, -48.75], [-53.25, -48.65], [-53.5, -48.75], [-53.75, -48.65], [-53.87, -48.7], [-53.82, -48.82], [-53.47, -48.97], [-53.25, -49.5], [-53.47, -50.03], [-53.82, -50.18], [-53.97, -50.53], [-54.32, -50.68], [-54.46, -51.0], [-54.25, -51.5], [-54.35, -51.75], [-54.25, -52.0], [-54.35, -52.25], [-54.32, -52.32], [-53.97, -52.47], [-53.75, -53.0], [-53.85, -53.25], [-53.75, -53.5], [-53.97, -54.03], [-54.32, -54.18], [-54.47, -54.53], [-55.0, -54.75], [-55.25, -54.65], [-55.32, -54.68], [-55.47, -55.03], [-56.0, -55.25], [-56.53, -55.03], [-56.68, -54.68], [-57.03, -54.53], [-57.25, -54.0], [-57.15, -53.75], [-57.18, -53.68], [-57.53, -53.53], [-57.68, -53.18], [-57.75, -53.15], [-58.0, -53.25], [-58.25, -53.15], [-58.32, -53.18], [-58.47, -53.53], [-59.0, -53.75], [-59.25, -53.65], [-59.5, -53.75], [-60.03, -53.53], [-60.25, -53.0], [-60.15, -52.75], [-60.18, -52.68], [-60.25, -52.65], [-60.5, -52.75], [-61.03, -52.53], [-61.25, -52.0], [-61.15, -51.75], [-61.18, -51.68], [-61.53, -51.53], [-61.75, -51.0], [-61.65, -50.75], [-61.68, -50.68], [-62.03, -50.53], [-62.25, -50.0]]]]}, "2026-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, -50.0], [-62.03, -49.47], [-61.5, -49.25], [-61.25, -49.35], [-61.18, -49.32], [-61.03, -48.97], [-60.5, -48.75], [-60.25, -48.85], [-60.18, -48.82], [-60.03, -48.47], [-59.5, -48.25], [-59.25, -48.35], [-59.0, -48.25], [-58.75, -48.35], [-58.5, -48.25], [-58.25, -48.35], [-58.0, -48.25], [-57.75, -48.35], [-57.68, -48.32], [-57.53, -47.97], [-57.0, -47.75], [-56.75, -47.85], [-56.68, -47.82], [-56.65, -47.75], [-56.75, -47.5], [-56.53, -46.97], [-56.12, -46.8], [-56.25, -46.5], [-56.15, -46.25], [-56.25, -46.0], [-56.15, -45.75], [-56.25, -45.5], [-56.15, -45.25], [-56.25, -45.0], [-56.03, -44.47], [-55.68, -44.32], [-55.65, -44.25], [-55.75, -44.0], [-55.53, -43.47], [-55.18, -43.32], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25], [-53.75, -42.35], [-53.68, -42.32], [-53.53, -41.97], [-53.0, -41.75], [-52.75, -41.85], [-52.5, -41.75], [-51.97, -41.97], [-51.75, -42.5], [-51.97, -43.03], [-52.32, -43.18], [-52.47, -43.53], [-52.82, -43.68], [-52.85, -43.75], [-52.75, -44.0], [-52.85, -44.25], [-52.82, -44.32], [-52.47, -44.47], [-52.25, -45.0], [-52.35, -45.25], [-52.25, -45.5], [-52.47, -46.03], [-52.82, -46.18], [-52.96, -46.5], [-52.82, -46.82], [-52.47, -46.97], [-52.25, -47.5], [-52.35, -47.75], [-52.25, -48.0], [-52.47, -48.53], [-53.0, -48.75], [-53.25, -48.65], [-53.5, -48.75], [-53.75, -48.65], [-53.87, -48.7], [-53.82, -48.82], [-53.47, -48.97], [-53.25, -49.5], [-53.47, -50.03], [-53.82, -50.18], [-53.97, -50.53], [-54.32, -50.68], [-54.46, -51.0], [-54.25, -51.5], [-54.35, -51.75], [-54.25, -52.0], [-54.35, -52.25], [-54.32, -52.32], [-53.97, -52.47], [-53.75, -53.0], [-53.85, -53.25], [-53.75, -53.5], [-53.97, -54.03], [-54.5, -54.25], [-55.0, -54.04], [-55.5, -54.25], [-56.03, -54.03], [-56.25, -53.5], [-56.15, -53.25], [-56.18, -53.18], [-56.53, -53.03], [-56.68, -52.68], [-56.75, -52.65], [-56.82, -52.68], [-56.97, -53.03], [-57.5, -53.25], [-57.75, -53.15], [-58.0, -53.25], [-58.25, -53.15], [-58.32, -53.18], [-58.47, -53.53], [-59.0, -53.75], [-59.25, -53.65], [-59.5, -53.75], [-60.03, -53.53], [-60.25, -53.0], [-60.15, -52.75], [-60.18, -52.68], [-60.53, -52.53], [-60.68, -52.18], [-61.03, -52.03], [-61.18, -51.68], [-61.53, -51.53], [-61.75, -51.0], [-61.65, -50.75], [-61.68, -50.68], [-62.03, -50.53], [-62.25, -50.0]]]]}, "2026-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.15, -45.75], [-56.25, -45.5], [-56.15, -45.25], [-56.25, -45.0], [-56.03, -44.47], [-55.68, -44.32], [-55.65, -44.25], [-55.75, -44.0], [-55.53, -43.47], [-55.18, -43.32], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25], [-53.75, -42.35], [-53.68, -42.32], [-53.53, -41.97], [-53.0, -41.75], [-52.75, -41.85], [-52.5, -41.75], [-51.97, -41.97], [-51.75, -42.5], [-51.97, -43.03], [-52.32, -43.18], [-52.47, -43.53], [-52.82, -43.68], [-52.85, -43.75], [-52.75, -44.0], [-52.85, -44.25], [-52.82, -44.32], [-52.47, -44.47], [-52.25, -45.0], [-52.35, -45.25], [-52.25, -45.5], [-52.47, -46.03], [-52.82, -46.18], [-52.96, -46.5], [-52.75, -47.0], [-52.85, -47.25], [-52.82, -47.32], [-52.47, -47.47], [-52.25, -48.0], [-52.47, -48.53], [-53.0, -48.75], [-53.25, -48.65], [-53.5, -48.75], [-54.03, -48.53], [-54.18, -48.18], [-54.25, -48.15], [-54.5, -48.25], [-54.75, -48.15], [-55.0, -48.25], [-55.25, -48.15], [-55.5, -48.25], [-55.75, -48.15], [-56.0, -48.25], [-56.53, -48.03], [-56.75, -47.5], [-56.53, -46.97], [-56.12, -46.8], [-56.25, -46.5], [-56.15, -46.25], [-56.25, -46.0], [-56.15, -45.75]]]]}, "2026-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.0, -42.25], [-53.75, -42.35], [-53.68, -42.32], [-53.53, -41.97], [-53.0, -41.75], [-52.75, -41.85], [-52.5, -41.75], [-51.97, -41.97], [-51.75, -42.5], [-51.97, -43.03], [-52.32, -43.18], [-52.47, -43.53], [-52.82, -43.68], [-52.97, -44.03], [-53.5, -44.25], [-53.75, -44.15], [-54.0, -44.25], [-54.25, -44.15], [-54.5, -44.25], [-55.03, -44.03], [-55.25, -43.5], [-55.03, -42.97], [-54.68, -42.82], [-54.53, -42.47], [-54.0, -42.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.369143079354785}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.418613380630021}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.078786305484584, 5.374849099690323, 5.478162876489364, 5.534964851991049, 7.446276134049867, 9.773332214355491]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.4147811889648665, 2.1153045654297102, 2.030305480957054, 1.9642985026042084, 5.788579559326195, 9.41779225667318]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.409692858047985, -2.4159662575678635, -2.2644268631063116, -2.375797021068615, -3.1339379954525803, -2.4483508841986463]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.190436554267876, -3.956903515796455, -3.6255635426729214, -3.4598599798688383, -4.369143079354785, -2.9527427047948436]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7998426590985064, -1.726356236038211, -1.6184062538302812, -1.6437793451947844, -1.8258265393922755, -1.3627968920546083]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.468024832956512, -2.432265588990089, -2.12060236387357, -2.084665284683098, -2.4210486408560574, -1.6031915657034659]}}