{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:25.901209", "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": "2022-Apr-18_to_2022-Apr-20_291.0_-1.0"}, "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": 2022040000606}, "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 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2022"}, "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": 52525.61163755991}, "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", "Colombia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": -1.0}, "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": 291.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "291.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 290.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 0.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-70.0, 0.75], [-69.75, 0.65], [-69.68, 0.68], [-69.53, 1.03], [-69.0, 1.25], [-68.47, 1.03], [-68.25, 0.5], [-68.35, 0.25], [-68.25, 0.0], [-68.35, -0.25], [-68.25, -0.5], [-68.35, -0.75], [-68.32, -0.82], [-67.97, -0.97], [-67.75, -1.5], [-67.85, -1.75], [-67.75, -2.0], [-67.85, -2.25], [-67.75, -2.5], [-67.97, -3.03], [-68.32, -3.18], [-68.47, -3.53], [-69.0, -3.75], [-69.25, -3.65], [-69.5, -3.75], [-70.03, -3.53], [-70.25, -3.0], [-70.15, -2.75], [-70.25, -2.5], [-70.03, -1.97], [-69.62, -1.8], [-69.68, -1.68], [-70.03, -1.53], [-70.18, -1.18], [-70.53, -1.03], [-70.75, -0.5], [-70.65, -0.25], [-70.75, 0.0], [-70.53, 0.53], [-70.0, 0.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.75, 0.0], [-70.52999999999997, 0.53], [-70.0, 0.75], [-69.75, 0.65], [-69.68, 0.68], [-69.52999999999997, 1.03], [-69.0, 1.25], [-68.47000000000003, 1.03], [-68.25, 0.5], [-68.35000000000002, 0.25], [-68.25, 0.0], [-68.35000000000002, -0.25], [-68.25, -0.5], [-68.35000000000002, -0.75], [-68.32, -0.82], [-67.97000000000003, -0.97], [-67.75, -1.5], [-67.85000000000002, -1.75], [-67.75, -2.0], [-67.85000000000002, -2.25], [-67.75, -2.5], [-67.97000000000003, -3.03], [-68.32, -3.18], [-68.47000000000003, -3.53], [-69.0, -3.75], [-69.25, -3.65], [-69.5, -3.75], [-70.02999999999997, -3.53], [-70.25, -3.0], [-70.14999999999998, -2.75], [-70.25, -2.5], [-70.02999999999997, -1.97], [-69.62, -1.8], [-69.68, -1.68], [-70.02999999999997, -1.53], [-70.18, -1.18], [-70.52999999999997, -1.03], [-70.75, -0.5], [-70.64999999999998, -0.25], [-70.75, 0.0]]]]}, "2022-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.75, 0.0], [-70.52999999999997, 0.53], [-70.0, 0.75], [-69.75, 0.65], [-69.68, 0.68], [-69.52999999999997, 1.03], [-69.0, 1.25], [-68.47000000000003, 1.03], [-68.25, 0.5], [-68.35000000000002, 0.25], [-68.25, 0.0], [-68.35000000000002, -0.25], [-68.25, -0.5], [-68.35000000000002, -0.75], [-68.32, -0.82], [-67.97000000000003, -0.97], [-67.75, -1.5], [-67.85000000000002, -1.75], [-67.75, -2.0], [-67.85000000000002, -2.25], [-67.75, -2.5], [-67.97000000000003, -3.03], [-68.32, -3.18], [-68.47000000000003, -3.53], [-69.0, -3.75], [-69.25, -3.65], [-69.5, -3.75], [-70.02999999999997, -3.53], [-70.25, -3.0], [-70.14999999999998, -2.75], [-70.25, -2.5], [-70.02999999999997, -1.97], [-69.62, -1.8], [-69.68, -1.68], [-70.02999999999997, -1.53], [-70.18, -1.18], [-70.52999999999997, -1.03], [-70.75, -0.5], [-70.64999999999998, -0.25], [-70.75, 0.0]]]]}, "2022-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.75, 0.0], [-70.52999999999997, 0.53], [-70.0, 0.75], [-69.75, 0.65], [-69.68, 0.68], [-69.52999999999997, 1.03], [-69.0, 1.25], [-68.47000000000003, 1.03], [-68.25, 0.5], [-68.35000000000002, 0.25], [-68.25, 0.0], [-68.35000000000002, -0.25], [-68.25, -0.5], [-68.35000000000002, -0.75], [-68.32, -0.82], [-67.97000000000003, -0.97], [-67.75, -1.5], [-67.85000000000002, -1.75], [-67.75, -2.0], [-67.85000000000002, -2.25], [-67.75, -2.5], [-67.97000000000003, -3.03], [-68.32, -3.18], [-68.47000000000003, -3.53], [-69.0, -3.75], [-69.25, -3.65], [-69.5, -3.75], [-70.02999999999997, -3.53], [-70.25, -3.0], [-70.14999999999998, -2.75], [-70.25, -2.5], [-70.02999999999997, -1.97], [-69.62, -1.8], [-69.68, -1.68], [-70.02999999999997, -1.53], [-70.18, -1.18], [-70.52999999999997, -1.03], [-70.75, -0.5], [-70.64999999999998, -0.25], [-70.75, 0.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.722182734031776}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1440920570824036}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.126620175312667, 24.059387716256595, 24.166273448414245]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.696762782953158, 23.420188887812344, 23.66932825098172]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1472024066056525, -1.2019600313830296, -1.0831137332585286]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.50562249049284, -1.722182734031776, -1.4000362296251296]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5533273026870347, -1.5901393010676965, -1.3967708021213312]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0019270560328293, -2.304547930057108, -1.7855064836911734]}}