{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:04.619906", "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": "2021-Dec-04_to_2021-Dec-06_321.0_-11.5"}, "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": 2021120000237}, "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": "December 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 06 2021"}, "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": 69869.65552232925}, "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": -11.5}, "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": 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": 319.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 321.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -12.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-41.0, -8.75], [-40.75, -8.85], [-40.68, -8.82], [-40.65, -8.75], [-40.75, -8.5], [-40.53, -7.97], [-40.0, -7.75], [-39.47, -7.97], [-39.25, -8.5], [-39.35, -8.75], [-39.25, -9.0], [-39.35, -9.25], [-39.32, -9.32], [-38.97, -9.47], [-38.75, -10.0], [-38.85, -10.25], [-38.82, -10.32], [-38.47, -10.47], [-38.32, -10.82], [-37.97, -10.97], [-37.75, -11.5], [-37.85, -11.75], [-37.75, -12.0], [-37.97, -12.53], [-38.5, -12.75], [-38.75, -12.65], [-39.0, -12.75], [-39.25, -12.65], [-39.5, -12.75], [-40.03, -12.53], [-40.18, -12.18], [-40.53, -12.03], [-40.68, -11.68], [-41.03, -11.53], [-41.18, -11.18], [-41.53, -11.03], [-41.75, -10.5], [-41.54, -10.0], [-41.75, -9.5], [-41.53, -8.97], [-41.0, -8.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.75, -9.5], [-41.52999999999997, -8.97], [-41.0, -8.75], [-40.75, -8.85], [-40.68000000000001, -8.82], [-40.64999999999998, -8.75], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.47000000000003, -7.97], [-39.25, -8.5], [-39.35000000000002, -8.75], [-39.25, -9.0], [-39.35000000000002, -9.25], [-39.31999999999999, -9.32], [-38.97000000000003, -9.47], [-38.75, -10.0], [-38.85000000000002, -10.25], [-38.81999999999999, -10.32], [-38.47000000000003, -10.47], [-38.31999999999999, -10.82], [-37.97000000000003, -10.97], [-37.75, -11.5], [-37.85000000000002, -11.75], [-37.75, -12.0], [-37.97000000000003, -12.53], [-38.5, -12.75], [-38.75, -12.65], [-39.0, -12.75], [-39.25, -12.65], [-39.5, -12.75], [-40.02999999999997, -12.53], [-40.18000000000001, -12.18], [-40.52999999999997, -12.03], [-40.68000000000001, -11.68], [-41.02999999999997, -11.53], [-41.18000000000001, -11.18], [-41.52999999999997, -11.03], [-41.75, -10.5], [-41.54000000000002, -10.0], [-41.75, -9.5]]]]}, "2021-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.75, -9.5], [-41.52999999999997, -8.97], [-41.0, -8.75], [-40.75, -8.85], [-40.68000000000001, -8.82], [-40.64999999999998, -8.75], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.47000000000003, -7.97], [-39.25, -8.5], [-39.35000000000002, -8.75], [-39.25, -9.0], [-39.35000000000002, -9.25], [-39.31999999999999, -9.32], [-38.97000000000003, -9.47], [-38.75, -10.0], [-38.85000000000002, -10.25], [-38.81999999999999, -10.32], [-38.47000000000003, -10.47], [-38.31999999999999, -10.82], [-37.97000000000003, -10.97], [-37.75, -11.5], [-37.85000000000002, -11.75], [-37.75, -12.0], [-37.97000000000003, -12.53], [-38.5, -12.75], [-38.75, -12.65], [-39.0, -12.75], [-39.25, -12.65], [-39.5, -12.75], [-40.02999999999997, -12.53], [-40.18000000000001, -12.18], [-40.52999999999997, -12.03], [-40.68000000000001, -11.68], [-41.02999999999997, -11.53], [-41.18000000000001, -11.18], [-41.52999999999997, -11.03], [-41.75, -10.5], [-41.54000000000002, -10.0], [-41.75, -9.5]]]]}, "2021-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.75, -9.5], [-41.52999999999997, -8.97], [-41.0, -8.75], [-40.75, -8.85], [-40.68000000000001, -8.82], [-40.64999999999998, -8.75], [-40.75, -8.5], [-40.52999999999997, -7.97], [-40.0, -7.75], [-39.47000000000003, -7.97], [-39.25, -8.5], [-39.35000000000002, -8.75], [-39.25, -9.0], [-39.35000000000002, -9.25], [-39.31999999999999, -9.32], [-38.97000000000003, -9.47], [-38.75, -10.0], [-38.85000000000002, -10.25], [-38.81999999999999, -10.32], [-38.47000000000003, -10.47], [-38.31999999999999, -10.82], [-37.97000000000003, -10.97], [-37.75, -11.5], [-37.85000000000002, -11.75], [-37.75, -12.0], [-37.97000000000003, -12.53], [-38.5, -12.75], [-38.75, -12.65], [-39.0, -12.75], [-39.25, -12.65], [-39.5, -12.75], [-40.02999999999997, -12.53], [-40.18000000000001, -12.18], [-40.52999999999997, -12.03], [-40.68000000000001, -11.68], [-41.02999999999997, -11.53], [-41.18000000000001, -11.18], [-41.52999999999997, -11.03], [-41.75, -10.5], [-41.54000000000002, -10.0], [-41.75, -9.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8111357993478805}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5614822449455783}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.320938727104988, 24.227716228832378, 25.080269654862263]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.227466180651902, 21.604926939487314, 22.455394476913455]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7195397245257498, -2.8942302150353942, -2.0706767952755913]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8111357993478805, -3.3595950290173278, -2.7922596603089005]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7994875683809837, -2.0347149679421146, -1.4489150756828844]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1507779543822503, -2.633114780902857, -1.754910272231155]}}