{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:21.117728", "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-08_315.5_-22.0"}, "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": 2025040000206}, "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 08 2025"}, "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": 57102.41372928072}, "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": -22.0}, "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": 315.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "315.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 312.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 316.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-47.5, -21.75], [-47.25, -21.85], [-47.0, -21.75], [-46.75, -21.85], [-46.5, -21.75], [-46.25, -21.85], [-46.0, 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[-48.25, -22.5], [-48.02999999999997, -21.97], [-47.5, -21.75], [-47.25, -21.85], [-47.0, -21.75], [-46.75, -21.85], [-46.5, -21.75], [-46.25, -21.85], [-46.0, -21.75], [-45.75, -21.85], [-45.5, -21.75], [-45.25, -21.85], [-45.0, -21.75], [-44.69999999999999, -21.88], [-44.64999999999998, -21.75], [-44.75, -21.5], [-44.52999999999997, -20.97], [-44.0, -20.75], [-43.47000000000003, -20.97], [-43.31999999999999, -21.32], [-42.97000000000003, -21.47], [-42.75, -22.0], [-42.85000000000002, -22.25], [-42.75, -22.5], [-42.97000000000003, -23.03], [-43.5, -23.25], [-43.75, -23.15], [-44.0, -23.25], [-44.5, -23.04], [-44.81999999999999, -23.18], [-44.97000000000003, -23.53], [-45.31999999999999, -23.68], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.620000000000005, -23.2], [-48.02999999999997, -23.03]]]]}, "2025-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.02999999999997, -23.03], [-48.25, -22.5], [-48.02999999999997, -21.97], [-47.5, -21.75], [-47.25, -21.85], [-47.0, -21.75], [-46.75, -21.85], [-46.5, -21.75], [-46.25, -21.85], [-46.0, -21.75], [-45.75, -21.85], [-45.68000000000001, -21.82], [-45.64999999999998, -21.75], [-45.75, -21.5], [-45.52999999999997, -20.97], [-45.0, -20.75], [-44.5, -20.96], [-44.0, -20.75], [-43.47000000000003, -20.97], [-43.31999999999999, -21.32], [-42.97000000000003, -21.47], [-42.75, -22.0], [-42.85000000000002, -22.25], [-42.75, -22.5], [-42.97000000000003, -23.03], [-43.5, -23.25], [-43.75, -23.15], [-44.0, -23.25], [-44.5, -23.04], [-44.81999999999999, -23.18], [-44.97000000000003, -23.53], [-45.31999999999999, -23.68], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.620000000000005, -23.2], [-48.02999999999997, -23.03]]]]}, "2025-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.02999999999997, -23.03], [-48.25, -22.5], [-48.02999999999997, -21.97], [-47.5, -21.75], [-47.25, -21.85], [-47.0, -21.75], [-46.75, -21.85], [-46.5, -21.75], [-46.25, -21.85], [-46.0, -21.75], [-45.75, -21.85], [-45.68000000000001, -21.82], [-45.64999999999998, -21.75], [-45.75, -21.5], [-45.52999999999997, -20.97], [-45.0, -20.75], [-44.5, -20.96], [-44.0, -20.75], [-43.47000000000003, -20.97], [-43.31999999999999, -21.32], [-42.97000000000003, -21.47], [-42.75, -22.0], [-42.85000000000002, -22.25], [-42.75, -22.5], [-42.97000000000003, -23.03], [-43.5, -23.25], [-43.75, -23.15], [-44.0, -23.25], [-44.5, -23.04], [-44.81999999999999, -23.18], [-44.97000000000003, -23.53], [-45.31999999999999, -23.68], [-45.47000000000003, -24.03], [-46.0, -24.25], [-46.25, -24.15], [-46.5, -24.25], [-46.75, -24.15], [-47.0, -24.25], [-47.52999999999997, -24.03], [-47.75, -23.5], [-47.620000000000005, -23.2], [-48.02999999999997, -23.03]]]]}, "2025-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-45.75, -21.5], [-45.52999999999997, -20.97], [-45.0, -20.75], [-44.47000000000003, -20.97], [-44.31999999999999, -21.32], [-43.97000000000003, -21.47], [-43.75, -22.0], [-43.97000000000003, -22.53], [-44.5, -22.75], [-44.75, -22.65], [-45.0, -22.75], [-45.52999999999997, -22.53], [-45.75, -22.0], [-45.64999999999998, -21.75], [-45.75, -21.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.460754581195033}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0256002848880996}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.698712472354714, 17.49588343302412, 18.455917358398438, 18.190352800157427]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.77084884643557, 14.937281545003259, 16.103687540690146, 16.9916765848796]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7678331226510307, -3.7326667562414, -2.687215501783592, -2.028402949239535]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.946862478993239, -4.460754581195033, -3.1717382733326076, -2.232953785769155]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6214721167315114, -2.226148389679046, -1.5650133096413537, -1.3605021519005145]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0596324709648655, -2.811618333934004, -1.9821312586944635, -1.4773067514820757]}}