{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:47:40.930050", "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-Jan-01_to_2023-Jan-03_294.5_-0.5"}, "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": 2023010000099}, "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": "January 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2023"}, "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": 61813.55446964329}, "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": -0.5}, "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": 294.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "294.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 292.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 296.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.5}, "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": [[[[-67.5, -0.25], [-67.25, -0.35], [-67.0, -0.25], [-66.5, -0.46], [-66.18, -0.32], [-66.15, -0.25], [-66.18, -0.18], [-66.53, -0.03], [-66.75, 0.5], [-66.53, 1.03], [-66.0, 1.25], [-65.75, 1.15], [-65.5, 1.25], [-65.25, 1.15], [-65.0, 1.25], [-64.47, 1.03], [-64.25, 0.5], [-64.35, 0.25], [-64.32, 0.18], [-64.25, 0.15], [-64.0, 0.25], [-63.75, 0.15], [-63.5, 0.25], [-62.97, 0.03], [-62.75, -0.5], [-62.97, -1.03], [-63.32, -1.18], [-63.47, -1.53], [-64.0, -1.75], [-64.5, -1.54], [-65.0, -1.75], [-65.25, -1.65], [-65.32, -1.68], [-65.47, -2.03], [-66.0, -2.25], [-66.25, -2.15], [-66.5, -2.25], [-66.75, -2.15], [-67.0, -2.25], [-67.25, -2.15], [-67.5, -2.25], [-68.03, -2.03], [-68.25, -1.5], [-68.15, -1.25], [-68.25, -1.0], [-68.03, -0.47], [-67.5, -0.25]]]]}}, "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": {"2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.25, -1.0], [-68.02999999999997, -0.47], [-67.5, -0.25], [-67.25, -0.35], [-67.0, -0.25], [-66.5, -0.46], [-66.18, -0.32], [-66.14999999999998, -0.25], [-66.18, -0.18], [-66.52999999999997, -0.03], [-66.75, 0.5], [-66.52999999999997, 1.03], [-66.0, 1.25], [-65.75, 1.15], [-65.5, 1.25], [-65.25, 1.15], [-65.0, 1.25], [-64.47000000000003, 1.03], [-64.25, 0.5], [-64.35000000000002, 0.25], [-64.32, 0.18], [-64.25, 0.15], [-64.0, 0.25], [-63.75, 0.15], [-63.5, 0.25], [-62.97000000000003, 0.03], [-62.75, -0.5], [-62.97000000000003, -1.03], [-63.31999999999999, -1.18], [-63.47000000000003, -1.53], [-64.0, -1.75], [-64.5, -1.54], [-65.0, -1.75], [-65.25, -1.65], [-65.32, -1.68], [-65.47000000000003, -2.03], [-66.0, -2.25], [-66.25, -2.15], [-66.5, -2.25], [-66.75, -2.15], [-67.0, -2.25], [-67.25, -2.15], [-67.5, -2.25], [-68.02999999999997, -2.03], [-68.25, -1.5], [-68.14999999999998, -1.25], [-68.25, -1.0]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.25, -1.0], [-68.02999999999997, -0.47], [-67.5, -0.25], [-67.25, -0.35], [-67.0, -0.25], [-66.5, -0.46], [-66.18, -0.32], [-66.14999999999998, -0.25], [-66.18, -0.18], [-66.52999999999997, -0.03], [-66.75, 0.5], [-66.52999999999997, 1.03], [-66.0, 1.25], [-65.75, 1.15], [-65.5, 1.25], [-65.25, 1.15], [-65.0, 1.25], [-64.47000000000003, 1.03], [-64.25, 0.5], [-64.35000000000002, 0.25], [-64.32, 0.18], [-64.25, 0.15], [-64.0, 0.25], [-63.75, 0.15], [-63.5, 0.25], [-62.97000000000003, 0.03], [-62.75, -0.5], [-62.97000000000003, -1.03], [-63.31999999999999, -1.18], [-63.47000000000003, -1.53], [-64.0, -1.75], [-64.5, -1.54], [-65.0, -1.75], [-65.25, -1.65], [-65.32, -1.68], [-65.47000000000003, -2.03], [-66.0, -2.25], [-66.25, -2.15], [-66.5, -2.25], [-66.75, -2.15], [-67.0, -2.25], [-67.25, -2.15], [-67.5, -2.25], [-68.02999999999997, -2.03], [-68.25, -1.5], [-68.14999999999998, -1.25], [-68.25, -1.0]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.25, -1.0], [-68.02999999999997, -0.47], [-67.5, -0.25], [-67.25, -0.35], [-67.0, -0.25], [-66.5, -0.46], [-66.18, -0.32], [-66.14999999999998, -0.25], [-66.18, -0.18], [-66.52999999999997, -0.03], [-66.75, 0.5], [-66.52999999999997, 1.03], [-66.0, 1.25], [-65.75, 1.15], [-65.5, 1.25], [-65.25, 1.15], [-65.0, 1.25], [-64.47000000000003, 1.03], [-64.25, 0.5], [-64.35000000000002, 0.25], [-64.32, 0.18], [-64.25, 0.15], [-64.0, 0.25], [-63.75, 0.15], [-63.5, 0.25], [-62.97000000000003, 0.03], [-62.75, -0.5], [-62.97000000000003, -1.03], [-63.31999999999999, -1.18], [-63.47000000000003, -1.53], [-64.0, -1.75], [-64.5, -1.54], [-65.0, -1.75], [-65.25, -1.65], [-65.32, -1.68], [-65.47000000000003, -2.03], [-66.0, -2.25], [-66.25, -2.15], [-66.5, -2.25], [-66.75, -2.15], [-67.0, -2.25], [-67.25, -2.15], [-67.5, -2.25], [-68.02999999999997, -2.03], [-68.25, -1.5], [-68.14999999999998, -1.25], [-68.25, -1.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.118983421225778}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.416380821620468}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.63345873650519, 24.31901568798901, 24.44203019155077]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.866312155798937, 22.262322834844554, 22.396614536113134]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2913132038878927, -1.5607793695412966, -1.397049891432215]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8276906474754355, -2.118983421225778, -1.803454705159254]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4875748175890053, -1.7673189911595564, -1.567813124022019]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9105231746554348, -2.227096050174168, -2.028220262712663]}}