{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:21.053887", "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-Apr-05_to_2025-Apr-07_310.0_-24.5"}, "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": 2025040000205}, "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": "April 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 07 2025"}, "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": 73071.89746412275}, "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": []}, "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": -24.5}, "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": 310.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "310.0\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": 311.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -24.5], [-52.03, -23.97], [-51.68, -23.82], [-51.53, -23.47], [-51.18, -23.32], [-51.03, -22.97], [-50.5, -22.75], [-50.0, -22.96], [-49.5, -22.75], [-48.97, -22.97], [-48.82, -23.32], [-48.75, -23.35], [-48.5, -23.25], [-47.97, -23.47], [-47.75, -24.0], [-47.85, -24.25], [-47.75, -24.5], [-47.85, -24.75], [-47.75, -25.0], [-47.97, -25.53], [-48.32, -25.68], [-48.47, -26.03], [-49.0, -26.25], [-49.25, -26.15], [-49.5, -26.25], [-49.75, -26.15], [-50.0, -26.25], [-50.53, -26.03], [-50.68, -25.68], [-50.75, -25.65], [-50.82, -25.68], [-50.97, -26.03], [-51.5, -26.25], [-52.03, -26.03], [-52.25, -25.5], [-52.15, -25.25], [-52.25, -25.0], [-52.15, -24.75], [-52.25, -24.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.14999999999998, -24.75], [-52.25, -24.5], [-52.02999999999997, -23.97], [-51.68000000000001, -23.82], [-51.52999999999997, -23.47], [-51.18000000000001, -23.32], [-51.02999999999997, -22.97], [-50.5, -22.75], [-50.0, -22.96], [-49.5, -22.75], [-48.97000000000003, -22.97], [-48.81999999999999, -23.32], [-48.75, -23.35], [-48.5, -23.25], [-47.97000000000003, -23.47], [-47.75, -24.0], [-47.85000000000002, -24.25], [-47.75, -24.5], [-47.85000000000002, -24.75], [-47.75, -25.0], [-47.97000000000003, -25.53], [-48.31999999999999, -25.68], [-48.47000000000003, -26.03], [-49.0, -26.25], [-49.25, -26.15], [-49.5, -26.25], [-49.75, -26.15], [-50.0, -26.25], [-50.52999999999997, -26.03], [-50.68000000000001, -25.68], [-50.75, -25.65], [-50.81999999999999, -25.68], [-50.97000000000003, -26.03], [-51.5, -26.25], [-52.02999999999997, -26.03], [-52.25, -25.5], [-52.14999999999998, -25.25], [-52.25, -25.0]]]]}, "2025-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.14999999999998, -24.75], [-52.25, -24.5], [-52.02999999999997, -23.97], [-51.68000000000001, -23.82], [-51.52999999999997, -23.47], [-51.18000000000001, -23.32], [-51.02999999999997, -22.97], [-50.5, -22.75], [-50.0, -22.96], [-49.5, -22.75], [-48.97000000000003, -22.97], [-48.81999999999999, -23.32], [-48.75, -23.35], [-48.5, -23.25], [-47.97000000000003, -23.47], [-47.75, -24.0], [-47.85000000000002, -24.25], [-47.75, -24.5], [-47.85000000000002, -24.75], [-47.75, -25.0], [-47.97000000000003, -25.53], [-48.31999999999999, -25.68], [-48.47000000000003, -26.03], [-49.0, -26.25], [-49.25, -26.15], [-49.5, -26.25], [-49.75, -26.15], [-50.0, -26.25], [-50.52999999999997, -26.03], [-50.68000000000001, -25.68], [-50.75, -25.65], [-50.81999999999999, -25.68], [-50.97000000000003, -26.03], [-51.5, -26.25], [-52.02999999999997, -26.03], [-52.25, -25.5], [-52.14999999999998, -25.25], [-52.25, -25.0]]]]}, "2025-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.14999999999998, -24.75], [-52.25, -24.5], [-52.02999999999997, -23.97], [-51.68000000000001, -23.82], [-51.52999999999997, -23.47], [-51.18000000000001, -23.32], [-51.02999999999997, -22.97], [-50.5, -22.75], [-50.0, -22.96], [-49.5, -22.75], [-48.97000000000003, -22.97], [-48.81999999999999, -23.32], [-48.75, -23.35], [-48.5, -23.25], [-47.97000000000003, -23.47], [-47.75, -24.0], [-47.85000000000002, -24.25], [-47.75, -24.5], [-47.85000000000002, -24.75], [-47.75, -25.0], [-47.97000000000003, -25.53], [-48.31999999999999, -25.68], [-48.47000000000003, -26.03], [-49.0, -26.25], [-49.25, -26.15], [-49.5, -26.25], [-49.75, -26.15], [-50.0, -26.25], [-50.52999999999997, -26.03], [-50.68000000000001, -25.68], [-50.75, -25.65], [-50.81999999999999, -25.68], [-50.97000000000003, -26.03], [-51.5, -26.25], [-52.02999999999997, -26.03], [-52.25, -25.5], [-52.14999999999998, -25.25], [-52.25, -25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.643106474893557}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.747695475647505}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.17524588169198, 16.779391420804586, 17.502093740610007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.62875900268557, 14.424342091878259, 15.318043009440146]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.493437157006678, -3.789521687171808, -2.96012758276403]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.643106474893557, -4.469049001333644, -3.6911469369325687]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2210020715037646, -1.8384517688317497, -1.3871961541134061]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6445938699408877, -2.120061747354585, -1.5808652757139332]}}