{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:27.985406", "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": "2023-Apr-21_to_2023-Apr-25_318.5_-18.0"}, "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": 2023040000750}, "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 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 130780.64105824687}, "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": -18.0}, "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": 318.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "318.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 317.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 321.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-42.15, -17.25], [-42.18, -17.18], [-42.53, -17.03], [-42.68, -16.68], [-42.75, -16.65], [-43.0, -16.75], [-43.53, -16.53], [-43.75, -16.0], [-43.53, -15.47], [-43.18, -15.32], [-43.15, -15.25], [-43.25, -15.0], [-43.03, -14.47], [-42.5, -14.25], [-42.25, -14.35], [-42.0, -14.25], [-41.75, -14.35], [-41.5, -14.25], [-41.25, -14.35], [-41.18, -14.32], [-41.03, -13.97], [-40.68, -13.82], [-40.53, -13.47], [-40.18, -13.32], [-40.03, -12.97], [-39.5, -12.75], [-38.97, -12.97], [-38.75, -13.5], [-38.85, -13.75], [-38.75, -14.0], [-38.85, -14.25], [-38.75, -14.5], [-38.85, -14.75], [-38.75, -15.0], [-38.85, -15.25], [-38.82, -15.32], [-38.47, -15.47], [-38.25, -16.0], [-38.35, -16.25], [-38.25, -16.5], [-38.47, -17.03], [-39.0, -17.25], [-39.25, -17.15], [-39.5, -17.25], [-39.8, -17.12], [-39.85, -17.25], [-39.75, -17.5], [-39.97, -18.03], [-40.5, -18.25], [-40.75, -18.15], [-40.82, -18.18], [-40.85, -18.25], [-40.75, -18.5], [-40.97, -19.03], [-41.5, -19.25], [-42.03, -19.03], [-42.18, -18.68], [-42.53, -18.53], [-42.75, -18.0], [-42.53, -17.47], [-42.18, -17.32], [-42.15, -17.25]]]]}}, "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": {"2023-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.0, -16.75], [-43.52999999999997, -16.53], [-43.75, -16.0], [-43.52999999999997, -15.47], [-43.0, -15.25], [-42.75, -15.35], [-42.5, -15.25], [-42.25, -15.35], [-42.0, -15.25], [-41.47000000000003, -15.47], [-41.31999999999999, -15.82], [-40.97000000000003, -15.97], [-40.81999999999999, -16.32], [-40.75, -16.35], [-40.5, -16.25], [-39.97000000000003, -16.47], [-39.75, -17.0], [-39.85000000000002, -17.25], [-39.75, -17.5], [-39.97000000000003, -18.03], [-40.5, -18.25], [-40.75, -18.15], [-40.81999999999999, -18.18], [-40.85000000000002, -18.25], [-40.75, -18.5], [-40.97000000000003, -19.03], [-41.5, -19.25], [-42.02999999999997, -19.03], [-42.25, -18.5], [-42.14999999999998, -18.25], [-42.25, -18.0], [-42.14999999999998, -17.75], [-42.25, -17.5], [-42.14999999999998, -17.25], [-42.18000000000001, -17.18], [-42.52999999999997, -17.03], [-42.68000000000001, -16.68], [-42.75, -16.65], [-43.0, -16.75]]]]}, "2023-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.14999999999998, -15.25], [-43.25, -15.0], [-43.02999999999997, -14.47], [-42.5, -14.25], [-42.25, -14.35], [-42.0, -14.25], [-41.75, -14.35], [-41.5, -14.25], [-41.25, -14.35], [-41.18000000000001, -14.32], [-41.02999999999997, -13.97], [-40.68000000000001, -13.82], [-40.52999999999997, -13.47], [-40.18000000000001, -13.32], [-40.02999999999997, -12.97], [-39.5, -12.75], [-38.97000000000003, -12.97], [-38.75, -13.5], [-38.85000000000002, -13.75], [-38.75, -14.0], [-38.85000000000002, -14.25], [-38.75, -14.5], [-38.85000000000002, -14.75], [-38.75, -15.0], [-38.85000000000002, -15.25], [-38.81999999999999, -15.32], [-38.47000000000003, -15.47], [-38.25, -16.0], [-38.35000000000002, -16.25], [-38.25, -16.5], [-38.47000000000003, -17.03], [-39.0, -17.25], [-39.25, -17.15], [-39.5, -17.25], [-39.80000000000001, -17.12], [-39.85000000000002, -17.25], [-39.75, -17.5], [-39.97000000000003, -18.03], [-40.5, -18.25], [-40.75, -18.15], [-40.81999999999999, -18.18], [-40.85000000000002, -18.25], [-40.75, -18.5], [-40.97000000000003, -19.03], [-41.5, -19.25], [-42.02999999999997, -19.03], [-42.18000000000001, -18.68], [-42.52999999999997, -18.53], [-42.75, -18.0], [-42.52999999999997, -17.47], [-42.18000000000001, -17.32], [-42.14999999999998, -17.25], [-42.18000000000001, -17.18], [-42.52999999999997, -17.03], [-42.68000000000001, -16.68], [-42.75, -16.65], [-43.0, -16.75], [-43.52999999999997, -16.53], [-43.75, -16.0], [-43.52999999999997, -15.47], [-43.18000000000001, -15.32], [-43.14999999999998, -15.25]]]]}, "2023-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.14999999999998, -15.25], [-43.25, -15.0], [-43.02999999999997, -14.47], [-42.5, -14.25], [-42.25, -14.35], [-42.0, -14.25], [-41.75, -14.35], [-41.5, -14.25], [-41.25, -14.35], [-41.18000000000001, -14.32], [-41.02999999999997, -13.97], [-40.68000000000001, -13.82], [-40.52999999999997, -13.47], [-40.18000000000001, -13.32], [-40.02999999999997, -12.97], [-39.5, -12.75], [-38.97000000000003, -12.97], [-38.75, -13.5], [-38.85000000000002, -13.75], [-38.75, -14.0], [-38.85000000000002, -14.25], [-38.75, -14.5], [-38.85000000000002, -14.75], [-38.75, -15.0], [-38.85000000000002, -15.25], [-38.81999999999999, -15.32], [-38.47000000000003, -15.47], [-38.25, -16.0], [-38.35000000000002, -16.25], [-38.25, -16.5], [-38.47000000000003, -17.03], [-39.0, -17.25], [-39.25, -17.15], [-39.5, -17.25], [-39.80000000000001, -17.12], [-39.85000000000002, -17.25], [-39.75, -17.5], [-39.97000000000003, -18.03], [-40.5, -18.25], [-40.75, -18.15], [-40.81999999999999, -18.18], [-40.85000000000002, -18.25], [-40.75, -18.5], [-40.97000000000003, -19.03], [-41.5, -19.25], [-42.02999999999997, -19.03], [-42.18000000000001, -18.68], [-42.52999999999997, -18.53], [-42.75, -18.0], [-42.52999999999997, -17.47], [-42.18000000000001, -17.32], [-42.14999999999998, -17.25], [-42.18000000000001, -17.18], [-42.52999999999997, -17.03], [-42.68000000000001, -16.68], [-42.75, -16.65], [-43.0, -16.75], [-43.52999999999997, -16.53], [-43.75, -16.0], [-43.52999999999997, -15.47], [-43.18000000000001, -15.32], [-43.14999999999998, -15.25]]]]}, "2023-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.14999999999998, -15.25], [-43.25, -15.0], [-43.02999999999997, -14.47], [-42.5, -14.25], [-42.25, -14.35], [-42.0, -14.25], [-41.75, -14.35], [-41.5, -14.25], [-41.25, -14.35], [-41.18000000000001, -14.32], [-41.02999999999997, -13.97], [-40.68000000000001, -13.82], [-40.52999999999997, -13.47], [-40.18000000000001, -13.32], [-40.02999999999997, -12.97], [-39.5, -12.75], [-38.97000000000003, -12.97], [-38.75, -13.5], [-38.85000000000002, -13.75], [-38.75, -14.0], [-38.85000000000002, -14.25], [-38.75, -14.5], [-38.85000000000002, -14.75], [-38.75, -15.0], [-38.85000000000002, -15.25], [-38.81999999999999, -15.32], [-38.47000000000003, -15.47], [-38.25, -16.0], [-38.35000000000002, -16.25], [-38.25, -16.5], [-38.47000000000003, -17.03], [-39.0, -17.25], [-39.25, -17.15], [-39.5, -17.25], [-39.80000000000001, -17.12], [-39.97000000000003, -17.53], [-40.5, -17.75], [-40.80000000000001, -17.62], [-40.85000000000002, -17.75], [-40.75, -18.0], [-40.85000000000002, -18.25], [-40.75, -18.5], [-40.97000000000003, -19.03], [-41.5, -19.25], [-42.02999999999997, -19.03], [-42.18000000000001, -18.68], [-42.52999999999997, -18.53], [-42.75, -18.0], [-42.52999999999997, -17.47], [-42.18000000000001, -17.32], [-42.14999999999998, -17.25], [-42.18000000000001, -17.18], [-42.52999999999997, -17.03], [-42.68000000000001, -16.68], [-42.75, -16.65], [-43.0, -16.75], [-43.52999999999997, -16.53], [-43.75, -16.0], [-43.52999999999997, -15.47], [-43.18000000000001, -15.32], [-43.14999999999998, -15.25]]]]}, "2023-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-42.75, -18.0], [-42.52999999999997, -17.47], [-42.0, -17.25], [-41.75, -17.35], [-41.5, -17.25], [-40.97000000000003, -17.47], [-40.75, -18.0], [-40.85000000000002, -18.25], [-40.75, -18.5], [-40.97000000000003, -19.03], [-41.5, -19.25], [-42.02999999999997, -19.03], [-42.18000000000001, -18.68], [-42.52999999999997, -18.53], [-42.75, -18.0]]], [[[-41.0, -17.25], [-41.52999999999997, -17.03], [-41.75, -16.5], [-41.52999999999997, -15.97], [-41.0, -15.75], [-40.47000000000003, -15.97], [-40.25, -16.5], [-40.47000000000003, -17.03], [-41.0, -17.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.314743279236211}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3014164574588865}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.08632421101163, 21.198661539483567, 21.42688695712303, 21.51889826553628, 21.22202385617078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.762458393517818, 18.523114048167315, 19.068385592796744, 19.17633387424877, 20.423490453810984]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.68669938163167, -2.4892567666920744, -2.2205881267789196, -2.0519903585760146, -2.4287327033613337]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.21372931273595, -3.314743279236211, -2.926797305125831, -2.602571503774641, -2.761841056412038]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6496635368318633, -1.8428069405395155, -1.716558133506704, -1.6204999296641853, -1.6114720337410504]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.038691325740683, -2.2832352582197313, -2.578370702735127, -1.8390059953307245, -1.772986754239938]}}