{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:27.477837", "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-Dec-31_to_2023-Jan-04_320.5_-12.0"}, "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": 2022120001452}, "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 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 04 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": 87566.9692985635}, "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": -12.0}, "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": 320.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "320.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 319.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 323.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-40.75, -11.5], [-40.65, -11.25], [-40.75, -11.0], [-40.53, -10.47], [-40.0, -10.25], [-39.47, -10.47], [-39.32, -10.82], [-38.97, -10.97], [-38.82, -11.32], [-38.75, -11.35], [-38.68, -11.32], [-38.53, -10.97], [-38.0, -10.75], [-37.75, -10.85], [-37.68, -10.82], [-37.53, -10.47], [-37.0, -10.25], [-36.47, -10.47], [-36.25, -11.0], [-36.35, -11.25], [-36.25, -11.5], [-36.35, -11.75], [-36.25, -12.0], [-36.47, -12.53], [-36.82, -12.68], [-36.85, -12.75], [-36.75, -13.0], [-36.85, -13.25], [-36.75, -13.5], [-36.97, -14.03], [-37.32, -14.18], [-37.47, -14.53], [-38.0, -14.75], [-38.53, -14.53], [-38.75, -14.0], [-38.65, -13.75], [-38.7, -13.62], [-39.0, -13.75], [-39.25, -13.65], [-39.5, -13.75], [-39.75, -13.65], [-40.0, -13.75], [-40.25, -13.65], [-40.5, -13.75], [-41.03, -13.53], [-41.25, -13.0], [-41.03, -12.47], [-40.68, -12.32], [-40.65, -12.25], [-40.75, -12.0], [-40.65, -11.75], [-40.75, -11.5]]]]}}, "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": {"2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.75, -12.0], [-40.52999999999997, -11.47], [-40.0, -11.25], [-39.75, -11.35], [-39.5, -11.25], [-38.97000000000003, -11.47], [-38.75, -12.0], [-38.97000000000003, -12.53], [-39.31999999999999, -12.68], [-39.47000000000003, -13.03], [-40.0, -13.25], [-40.52999999999997, -13.03], [-40.75, -12.5], [-40.64999999999998, -12.25], [-40.75, -12.0]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-40.75, -12.0], [-40.64999999999998, -11.75], [-40.75, -11.5], [-40.52999999999997, -10.97], [-40.0, -10.75], [-39.75, -10.85], [-39.5, -10.75], [-38.97000000000003, -10.97], [-38.81999999999999, -11.32], [-38.75, -11.35], [-38.68000000000001, -11.32], [-38.52999999999997, -10.97], [-38.0, -10.75], [-37.75, -10.85], [-37.68000000000001, -10.82], [-37.52999999999997, -10.47], [-37.0, -10.25], [-36.47000000000003, -10.47], 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{"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5755108042654342, -1.33992973086854, -2.023293881714014, -2.042741644900996, -1.7359325003507444]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6557727216417106, -1.9426593438753343, -3.2926262024517428, -3.679421675341075, -2.16253394837463]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3115484276083362, -1.8658859082361614, -2.4968883282972896, -2.2697170673486067, -1.4262220767911333]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3485855977231906, -3.335566502503305, -3.4952194103316745, -3.462513592554454, -1.646886964634627]}}