{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:47.125536", "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": "2016-Dec-18_to_2016-Dec-21_315.5_-2.5"}, "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": 2016120000560}, "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 18 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 2016"}, "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": 111075.61172906874}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": ["South 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": -2.5}, "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": 315.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "315.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 314.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 319.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -5.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -1.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.03, -1.47], [-45.5, -1.25], [-45.25, -1.35], [-45.0, 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"coordinates": [[[[-46.03, -1.47], [-45.5, -1.25], [-45.25, -1.35], [-45.0, -1.25], [-44.47, -1.47], [-44.32, -1.82], [-44.25, -1.85], [-44.0, -1.75], [-43.75, -1.85], [-43.5, -1.75], [-43.25, -1.85], [-43.0, -1.75], [-42.47, -1.97], [-42.32, -2.32], [-42.25, -2.35], [-42.0, -2.25], [-41.75, -2.35], [-41.5, -2.25], [-41.25, -2.35], [-41.0, -2.25], [-40.47, -2.47], [-40.25, -3.0], [-40.47, -3.53], [-40.82, -3.68], [-40.85, -3.75], [-40.82, -3.82], [-40.47, -3.97], [-40.32, -4.32], [-39.97, -4.47], [-39.75, -5.0], [-39.97, -5.53], [-40.5, -5.75], [-40.75, -5.65], [-41.0, -5.75], [-41.25, -5.65], [-41.5, -5.75], [-42.03, -5.53], [-42.25, -5.0], [-42.12, -4.7], [-42.25, -4.65], [-42.5, -4.75], [-42.75, -4.65], [-43.0, -4.75], [-43.25, -4.65], [-43.5, -4.75], [-43.75, -4.65], [-44.0, -4.75], [-44.25, -4.65], [-44.5, -4.75], [-45.03, -4.53], [-45.18, -4.18], [-45.53, -4.03], [-45.75, -3.5], [-45.65, -3.25], [-45.68, -3.18], [-46.03, -3.03], [-46.25, -2.5], [-46.15, -2.25], [-46.25, -2.0], [-46.03, -1.47]]]]}, "2016-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.03, -1.47], [-45.5, -1.25], [-45.25, -1.35], [-45.0, -1.25], [-44.47, -1.47], [-44.32, -1.82], [-44.25, -1.85], [-44.0, -1.75], [-43.75, -1.85], [-43.5, -1.75], [-43.25, -1.85], [-43.0, -1.75], [-42.47, -1.97], [-42.32, -2.32], [-42.25, -2.35], [-42.0, -2.25], [-41.75, -2.35], [-41.5, -2.25], [-41.25, -2.35], [-41.0, -2.25], [-40.47, -2.47], [-40.25, -3.0], [-40.47, -3.53], [-40.82, -3.68], [-40.85, -3.75], [-40.82, -3.82], [-40.47, -3.97], [-40.32, -4.32], [-39.97, -4.47], [-39.75, -5.0], [-39.97, -5.53], [-40.5, -5.75], [-40.75, -5.65], [-41.0, -5.75], [-41.25, -5.65], [-41.5, -5.75], [-42.03, -5.53], [-42.25, -5.0], [-42.12, -4.7], [-42.25, -4.65], [-42.5, -4.75], [-42.75, -4.65], [-43.0, -4.75], [-43.25, -4.65], [-43.5, -4.75], [-43.75, -4.65], [-44.0, -4.75], [-44.25, -4.65], [-44.5, -4.75], [-45.03, -4.53], [-45.18, -4.18], [-45.53, -4.03], [-45.75, -3.5], [-45.65, -3.25], 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maximum t2m.", "value": [23.722236708927653, 23.559215509226306, 25.366662537816012, 26.668272298406805]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.762493331446922, -3.3208080047408703, -1.9061453211038024, -1.153915650230232]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.184469251843495, -4.494810890642896, -3.121930294883896, -1.3910462346117356]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.281535826816631, -2.9409615714537, -1.6599107305506762, -1.3117608026727812]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.81362910932082, 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