{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:12.423052", "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-21_to_2022-Dec-24_303.0_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": 2022120000982}, "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 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 24 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 86522.64226673395}, "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", "Guyana", "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": 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": 303.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 301.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 305.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 0.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-57.25, -0.65], [-57.5, -0.75], [-58.03, -0.53], [-58.25, 0.0], [-58.15, 0.25], [-58.18, 0.32], [-58.53, 0.47], [-58.68, 0.82], [-59.03, 0.97], [-59.25, 1.5], [-59.03, 2.03], [-58.5, 2.25], [-58.25, 2.15], [-58.18, 2.18], [-58.03, 2.53], [-57.5, 2.75], [-57.25, 2.65], [-57.0, 2.75], [-56.75, 2.65], [-56.68, 2.68], [-56.53, 3.03], [-56.0, 3.25], [-55.75, 3.15], [-55.5, 3.25], [-55.25, 3.15], [-55.0, 3.25], [-54.47, 3.03], [-54.25, 2.5], [-54.47, 1.97], [-54.82, 1.82], [-54.85, 1.75], [-54.82, 1.68], [-54.47, 1.53], [-54.25, 1.0], [-54.47, 0.47], [-55.0, 0.25], [-55.25, 0.35], [-55.32, 0.32], [-55.47, -0.03], [-55.82, -0.18], [-55.97, -0.53], [-56.5, -0.75], [-56.75, -0.65], [-57.0, -0.75], [-57.25, -0.65]]]]}}, "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": {"2022-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.0, 1.25], [-56.75, 1.15], [-56.5, 1.25], [-55.97000000000003, 1.03], [-55.75, 0.5], [-55.97000000000003, -0.03], [-56.31999999999999, -0.18], [-56.47000000000003, -0.53], [-57.0, -0.75], [-57.25, -0.65], [-57.5, -0.75], [-58.02999999999997, -0.53], [-58.25, 0.0], [-58.02999999999997, 0.53], [-57.68000000000001, 0.68], [-57.52999999999997, 1.03], [-57.0, 1.25]]], [[[-58.5, 0.75], [-59.02999999999997, 0.97], [-59.25, 1.5], [-59.02999999999997, 2.03], [-58.5, 2.25], [-57.97000000000003, 2.03], [-57.75, 1.5], [-57.97000000000003, 0.97], [-58.5, 0.75]]]]}, "2022-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.02999999999997, 0.97], [-59.25, 1.5], [-59.02999999999997, 2.03], [-58.5, 2.25], [-58.25, 2.15], [-58.18000000000001, 2.18], [-58.02999999999997, 2.53], [-57.5, 2.75], [-57.25, 2.65], [-57.0, 2.75], [-56.75, 2.65], [-56.68000000000001, 2.68], [-56.52999999999997, 3.03], [-56.0, 3.25], [-55.75, 3.15], [-55.5, 3.25], [-55.25, 3.15], [-55.0, 3.25], [-54.47000000000003, 3.03], [-54.25, 2.5], [-54.47000000000003, 1.97], [-54.81999999999999, 1.82], [-54.85000000000002, 1.75], [-54.81999999999999, 1.68], [-54.47000000000003, 1.53], [-54.25, 1.0], [-54.47000000000003, 0.47], [-55.0, 0.25], [-55.25, 0.35], [-55.31999999999999, 0.32], [-55.47000000000003, -0.03], [-55.81999999999999, -0.18], [-55.97000000000003, -0.53], [-56.5, -0.75], [-56.75, -0.65], [-57.0, -0.75], [-57.25, -0.65], [-57.5, -0.75], [-58.02999999999997, -0.53], [-58.25, 0.0], [-58.14999999999998, 0.25], [-58.18000000000001, 0.32], [-58.52999999999997, 0.47], [-58.68000000000001, 0.82], [-59.02999999999997, 0.97]]]]}, "2022-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.02999999999997, 0.97], [-59.25, 1.5], [-59.02999999999997, 2.03], [-58.5, 2.25], [-58.25, 2.15], [-58.18000000000001, 2.18], [-58.02999999999997, 2.53], [-57.5, 2.75], [-57.25, 2.65], [-57.0, 2.75], [-56.75, 2.65], [-56.68000000000001, 2.68], [-56.52999999999997, 3.03], [-56.0, 3.25], [-55.75, 3.15], [-55.5, 3.25], [-55.25, 3.15], [-55.0, 3.25], 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"Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.028418574758348, 23.585039843833783, 23.621644407265023, 23.655727911276074]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.399634481129, 22.81338387942975, 22.968639211190123, 22.864327035163683]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6839348901739755, -1.8841279898370564, -1.8314123581789699, -1.7639664143224432]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8836102546408142, -2.427816176656563, -2.550591397962478, -2.199822842990784]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3409156597149317, -1.5919380640883813, -1.5562236456641776, -1.5657528583826776]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.436499999208861, -1.9388232601129924, -1.8492250441471993, -1.8693974454579116]}}