{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:40.300518", "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": "2022-Jan-01_to_2022-Jan-04_309.5_-1.0"}, "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": 2022010000078}, "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": "January 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 04 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 55628.338992835634}, "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"]}, "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": ["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": -1.0}, "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": 309.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 308.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.0}, "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": 0.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-51.68, -0.82], [-51.53, -0.47], [-51.18, -0.32], [-51.03, 0.03], [-50.68, 0.18], [-50.53, 0.53], [-50.0, 0.75], [-49.75, 0.65], [-49.5, 0.75], [-48.97, 0.53], [-48.82, 0.18], [-48.47, 0.03], [-48.25, -0.5], [-48.35, -0.75], [-48.25, -1.0], [-48.35, -1.25], [-48.25, -1.5], [-48.47, -2.03], [-49.0, -2.25], [-49.25, -2.15], [-49.5, -2.25], [-49.75, -2.15], [-50.0, -2.25], [-50.25, -2.15], [-50.32, -2.18], [-50.47, -2.53], [-51.0, -2.75], [-51.53, -2.53], [-51.68, -2.18], [-52.03, -2.03], [-52.25, -1.5], [-52.03, -0.97], [-51.68, -0.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "N.E.South-America", "Equatorial.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.02999999999997, -2.03], [-52.25, -1.5], [-52.02999999999997, -0.97], [-51.68000000000001, -0.82], [-51.52999999999997, -0.47], [-51.18000000000001, -0.32], [-51.02999999999997, 0.03], [-50.68000000000001, 0.18], [-50.52999999999997, 0.53], [-50.0, 0.75], [-49.75, 0.65], [-49.5, 0.75], [-48.97000000000003, 0.53], [-48.81999999999999, 0.18], [-48.47000000000003, 0.03], [-48.25, -0.5], [-48.35000000000002, -0.75], [-48.25, -1.0], [-48.35000000000002, -1.25], [-48.25, -1.5], [-48.47000000000003, -2.03], [-49.0, -2.25], [-49.5, -2.04], [-50.0, -2.25], [-50.25, -2.15], [-50.31999999999999, -2.18], [-50.47000000000003, -2.53], [-51.0, -2.75], [-51.52999999999997, -2.53], [-51.68000000000001, -2.18], [-52.02999999999997, -2.03]]]]}, "2022-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.02999999999997, -2.03], [-52.25, -1.5], [-52.02999999999997, -0.97], [-51.68000000000001, -0.82], [-51.52999999999997, -0.47], [-51.18000000000001, -0.32], [-51.02999999999997, 0.03], [-50.68000000000001, 0.18], [-50.52999999999997, 0.53], [-50.0, 0.75], [-49.75, 0.65], [-49.5, 0.75], [-48.97000000000003, 0.53], [-48.81999999999999, 0.18], [-48.47000000000003, 0.03], [-48.25, -0.5], [-48.35000000000002, -0.75], [-48.25, -1.0], [-48.35000000000002, -1.25], [-48.25, -1.5], [-48.47000000000003, -2.03], [-49.0, -2.25], [-49.25, -2.15], [-49.5, -2.25], [-49.75, -2.15], [-50.0, -2.25], [-50.25, -2.15], [-50.31999999999999, -2.18], [-50.47000000000003, -2.53], [-51.0, -2.75], [-51.52999999999997, -2.53], [-51.68000000000001, -2.18], [-52.02999999999997, -2.03]]]]}, "2022-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.02999999999997, -2.03], [-52.25, -1.5], [-52.02999999999997, -0.97], [-51.68000000000001, -0.82], [-51.52999999999997, -0.47], [-51.18000000000001, -0.32], [-51.02999999999997, 0.03], [-50.68000000000001, 0.18], [-50.52999999999997, 0.53], [-50.0, 0.75], [-49.75, 0.65], [-49.5, 0.75], [-48.97000000000003, 0.53], [-48.81999999999999, 0.18], [-48.47000000000003, 0.03], [-48.25, -0.5], [-48.35000000000002, -0.75], [-48.25, -1.0], [-48.35000000000002, -1.25], [-48.25, -1.5], [-48.47000000000003, -2.03], [-49.0, -2.25], [-49.25, -2.15], [-49.5, -2.25], [-49.75, -2.15], [-50.0, -2.25], [-50.25, -2.15], [-50.31999999999999, -2.18], [-50.47000000000003, -2.53], [-51.0, -2.75], [-51.52999999999997, -2.53], [-51.68000000000001, -2.18], [-52.02999999999997, -2.03]]]]}, "2022-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.02999999999997, -2.03], [-52.25, -1.5], [-52.02999999999997, -0.97], [-51.68000000000001, -0.82], [-51.52999999999997, -0.47], [-51.0, -0.25], [-50.75, -0.35], [-50.620000000000005, -0.3], [-50.75, 0.0], [-50.52999999999997, 0.53], [-50.0, 0.75], [-49.75, 0.65], [-49.5, 0.75], [-48.97000000000003, 0.53], [-48.75, 0.0], [-48.95999999999998, -0.5], [-48.75, -1.0], [-48.85000000000002, -1.25], [-48.75, -1.5], [-48.97000000000003, -2.03], [-49.5, -2.25], [-49.75, -2.15], [-50.0, -2.25], [-50.25, -2.15], [-50.31999999999999, -2.18], [-50.47000000000003, -2.53], [-51.0, -2.75], [-51.52999999999997, -2.53], [-51.68000000000001, -2.18], [-52.02999999999997, -2.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.216861958277377}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7361540507635682}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.138506046602743, 25.027458626424846, 24.86755021736161, 25.03902128658865]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.639948578584892, 24.69503826402746, 24.59692034948762, 24.67924995319339]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6687430268204366, -1.7423203966866463, -1.8550873041310751, -1.6440036024137943]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.909965222988376, -2.1538773471355057, -2.216861958277377, -2.0881686068913723]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7345244927576347, -1.7435244357314483, -1.8070034858797648, -1.4374748710385294]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0372926344848103, -2.0279753367220072, -2.1460346804156205, -1.6708919337194026]}}