{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:20.273490", "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-22_to_2021-Dec-26_306.0_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": 2021120000850}, "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 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 26 2021"}, "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": 95760.69109754996}, "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", "French Guiana", "Suriname"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 304.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 308.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-52.25, 2.65], [-52.0, 2.75], [-51.47, 2.53], [-51.25, 2.0], [-51.47, 1.47], [-51.82, 1.32], [-51.85, 1.25], [-51.75, 1.0], [-51.97, 0.47], [-52.5, 0.25], [-52.75, 0.35], [-53.0, 0.25], [-53.5, 0.46], [-54.0, 0.25], [-54.25, 0.35], [-54.5, 0.25], [-54.75, 0.35], [-55.0, 0.25], [-55.25, 0.35], [-55.5, 0.25], [-56.03, 0.47], [-56.18, 0.82], [-56.53, 0.97], [-56.75, 1.5], [-56.65, 1.75], [-56.75, 2.0], [-56.53, 2.53], [-56.18, 2.68], [-56.03, 3.03], [-55.5, 3.25], [-55.25, 3.15], [-55.18, 3.18], [-55.03, 3.53], [-54.5, 3.75], [-54.25, 3.65], [-54.18, 3.68], [-54.03, 4.03], [-53.5, 4.25], [-52.97, 4.03], [-52.82, 3.68], [-52.47, 3.53], [-52.25, 3.0], [-52.37, 2.7], [-52.25, 2.65]]]]}}, "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": {"2021-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, 2.5], [-55.52999999999997, 3.03], [-55.18000000000001, 3.18], [-55.02999999999997, 3.53], [-54.5, 3.75], [-54.25, 3.65], [-54.18000000000001, 3.68], [-54.02999999999997, 4.03], [-53.5, 4.25], [-52.97000000000003, 4.03], [-52.81999999999999, 3.68], [-52.47000000000003, 3.53], [-52.25, 3.0], [-52.47000000000003, 2.47], [-52.81999999999999, 2.32], [-52.97000000000003, 1.97], [-53.31999999999999, 1.82], [-53.47000000000003, 1.47], [-54.0, 1.25], [-54.5, 1.46], [-55.0, 1.25], [-55.52999999999997, 1.47], [-55.75, 2.0], [-55.64999999999998, 2.25], [-55.75, 2.5]]]]}, "2021-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.52999999999997, 0.97], [-56.75, 1.5], [-56.52999999999997, 2.03], [-56.18000000000001, 2.18], [-56.14999999999998, 2.25], [-56.25, 2.5], [-56.02999999999997, 3.03], [-55.5, 3.25], [-55.25, 3.15], [-55.18000000000001, 3.18], [-55.02999999999997, 3.53], [-54.5, 3.75], [-54.25, 3.65], [-54.18000000000001, 3.68], [-54.02999999999997, 4.03], [-53.5, 4.25], [-52.97000000000003, 4.03], [-52.81999999999999, 3.68], [-52.47000000000003, 3.53], [-52.25, 3.0], [-52.47000000000003, 2.47], [-52.81999999999999, 2.32], [-52.85000000000002, 2.25], [-52.75, 2.0], [-52.97000000000003, 1.47], [-53.31999999999999, 1.32], [-53.35000000000002, 1.25], [-53.25, 1.0], [-53.47000000000003, 0.47], [-54.0, 0.25], [-54.25, 0.35], [-54.5, 0.25], [-54.75, 0.35], [-55.0, 0.25], [-55.25, 0.35], [-55.5, 0.25], [-56.02999999999997, 0.47], [-56.18000000000001, 0.82], [-56.52999999999997, 0.97]]]]}, "2021-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.75, 2.0], [-56.52999999999997, 2.53], [-56.18000000000001, 2.68], [-56.02999999999997, 3.03], [-55.5, 3.25], [-55.25, 3.15], [-55.18000000000001, 3.18], [-55.02999999999997, 3.53], [-54.5, 3.75], [-54.25, 3.65], [-54.18000000000001, 3.68], [-54.02999999999997, 4.03], [-53.5, 4.25], [-52.97000000000003, 4.03], [-52.81999999999999, 3.68], [-52.47000000000003, 3.53], [-52.25, 3.0], [-52.370000000000005, 2.7], [-52.25, 2.65], [-52.0, 2.75], [-51.47000000000003, 2.53], [-51.25, 2.0], [-51.47000000000003, 1.47], [-51.81999999999999, 1.32], [-51.85000000000002, 1.25], [-51.75, 1.0], [-51.97000000000003, 0.47], [-52.5, 0.25], [-52.75, 0.35], [-53.0, 0.25], [-53.5, 0.46], [-54.0, 0.25], [-54.25, 0.35], [-54.5, 0.25], [-54.75, 0.35], [-55.0, 0.25], [-55.25, 0.35], [-55.5, 0.25], [-56.02999999999997, 0.47], [-56.18000000000001, 0.82], [-56.52999999999997, 0.97], [-56.75, 1.5], [-56.64999999999998, 1.75], [-56.75, 2.0]]]]}, "2021-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.75, 2.0], [-56.52999999999997, 2.53], [-56.18000000000001, 2.68], [-56.02999999999997, 3.03], [-55.5, 3.25], [-55.25, 3.15], [-55.0, 3.25], [-54.5, 3.04], [-54.0, 3.25], [-53.75, 3.15], [-53.5, 3.25], [-52.97000000000003, 3.03], [-52.80000000000001, 2.62], [-52.5, 2.75], [-52.25, 2.65], [-52.0, 2.75], [-51.47000000000003, 2.53], [-51.25, 2.0], [-51.47000000000003, 1.47], [-51.81999999999999, 1.32], [-51.85000000000002, 1.25], [-51.75, 1.0], [-51.97000000000003, 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2.53], [-56.0, 2.75], [-55.47000000000003, 2.53], [-55.25, 2.0], [-55.47000000000003, 1.47], [-56.0, 1.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.0804603126763936}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8165914643629957}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.034063034960298, 23.767490651983167, 23.738970885555773, 23.249775960935267, 24.11559091516466]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.38183999332574, 23.19918245414675, 23.020708427132092, 22.64439476034181, 23.666453772512114]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4005422324270078, -1.6732574702465708, -1.7772824880777325, -2.241660431901871, -1.6426429001706637]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6340915061285273, -2.256123374877234, -2.429124577226503, -3.0804603126763936, -1.9612705626288403]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3815435289964177, -1.5325385807167802, -1.6701144613759697, -2.0790834233992315, -1.575861491391057]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.61225948259267, -1.899605093362307, -2.021816408139513, -2.7324557808194383, -1.7906414252146807]}}