{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:21.215505", "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-Mar-28_to_2026-Mar-31_321.0_-14.0"}, "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": 2026030000804}, "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": "March 28 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2026"}, "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": 56751.37409447683}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.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": -14.0}, "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": 321.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "321.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 320.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 322.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.65, -15.75], [-39.75, -15.5], [-39.65, -15.25], 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[-39.65, -14.25], [-39.75, -14.0], [-39.65, -13.75], [-39.75, -13.5], [-39.65, -13.25], [-39.75, -13.0], [-39.65, -12.75], [-39.75, -12.5], [-39.53, -11.97], [-39.0, -11.75], [-38.75, -11.85], [-38.5, -11.75], [-37.97, -11.97], [-37.75, -12.5], [-37.85, -12.75], [-37.75, -13.0], [-37.85, -13.25], [-37.75, -13.5], [-37.85, -13.75], [-37.75, -14.0], [-37.97, -14.53], [-38.32, -14.68], [-38.35, -14.75], [-38.25, -15.0], [-38.35, -15.25], [-38.32, -15.32], [-38.25, -15.35], [-38.0, -15.25], [-37.47, -15.47], [-37.32, -15.82], [-36.97, -15.97], [-36.75, -16.5], [-36.97, -17.03], [-37.32, -17.18], [-37.47, -17.53], [-38.0, -17.75], [-38.53, -17.53], [-38.68, -17.18], [-38.75, -17.15], [-39.0, -17.25], [-39.53, -17.03], [-39.75, -16.5], [-39.65, -16.25], [-39.75, -16.0], [-39.65, -15.75]]]]}, "2026-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.65, -15.75], [-39.75, -15.5], [-39.65, -15.25], [-39.75, -15.0], [-39.65, -14.75], [-39.75, -14.5], [-39.65, -14.25], [-39.75, -14.0], [-39.65, -13.75], [-39.75, -13.5], [-39.65, -13.25], [-39.75, -13.0], [-39.65, -12.75], [-39.75, -12.5], [-39.53, -11.97], [-39.0, -11.75], [-38.75, -11.85], [-38.5, -11.75], [-37.97, -11.97], [-37.75, -12.5], [-37.85, -12.75], [-37.75, -13.0], [-37.85, -13.25], [-37.75, -13.5], [-37.85, -13.75], [-37.75, -14.0], [-37.97, -14.53], [-38.32, -14.68], [-38.35, -14.75], [-38.25, -15.0], [-38.35, -15.25], [-38.32, -15.32], [-38.25, -15.35], [-38.0, -15.25], [-37.47, -15.47], [-37.32, -15.82], [-36.97, -15.97], [-36.75, -16.5], [-36.97, -17.03], [-37.32, -17.18], [-37.47, -17.53], [-38.0, -17.75], [-38.53, -17.53], [-38.68, -17.18], [-38.75, -17.15], [-39.0, -17.25], [-39.53, -17.03], [-39.75, -16.5], [-39.65, -16.25], [-39.75, -16.0], [-39.65, -15.75]]]]}, "2026-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.65, -13.25], [-39.75, -13.0], [-39.65, -12.75], [-39.75, -12.5], [-39.53, -11.97], [-39.0, -11.75], [-38.75, -11.85], [-38.5, -11.75], [-37.97, -11.97], [-37.75, -12.5], [-37.97, -13.03], [-38.32, -13.18], [-38.35, -13.25], [-38.25, -13.5], [-38.35, -13.75], [-38.25, -14.0], [-38.47, -14.53], [-39.0, -14.75], [-39.53, -14.53], [-39.75, -14.0], [-39.65, -13.75], [-39.75, -13.5], [-39.65, -13.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7959876051850188}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2338606533816119}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.17005959969981, 25.093799510755105, 25.206183436878916, 25.080772908528672]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.776699320475302, 24.633748626709007, 24.76359074910482, 24.90411275227865]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2409485919906413, -1.2944794852408863, -1.1718211670500438, -1.2137425613838217]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6071605776909905, -1.7959876051850188, -1.7741571233573268, -1.4521398441326596]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6238181169645585, -1.6322105176128752, -1.4966232406715023, -1.3556710224988298]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1866960281006027, -1.9272053923419814, -1.8098469793013772, -1.5755314503286053]}}