{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:44.529011", "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": "2026-Jan-08_to_2026-Jan-11_302.5_-35.0"}, "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": 2026010000318}, "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 08 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 11 2026"}, "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": 62752.65649984137}, "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": ["Argentina", "Uruguay"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["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": -35.0}, "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": 302.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "302.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 301.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-59.0, -34.75], [-58.7, -34.88], [-58.65, -34.75], [-58.75, -34.5], [-58.53, -33.97], [-58.0, -33.75], [-57.75, -33.85], [-57.5, -33.75], [-56.97, -33.97], [-56.75, -34.5], [-56.85, -34.75], [-56.82, -34.82], [-56.5, -34.96], [-56.0, -34.75], [-55.75, -34.85], [-55.5, -34.75], [-55.25, -34.85], [-55.0, -34.75], [-54.75, -34.85], [-54.5, -34.75], [-54.25, -34.85], [-54.0, -34.75], [-53.47, -34.97], [-53.25, -35.5], [-53.35, -35.75], [-53.25, -36.0], [-53.47, -36.53], [-54.0, -36.75], [-54.25, -36.65], [-54.32, -36.68], [-54.47, -37.03], [-55.0, -37.25], [-55.53, -37.03], [-55.68, -36.68], [-55.75, -36.65], [-56.0, -36.75], [-56.25, -36.65], [-56.32, -36.68], [-56.47, -37.03], [-57.0, -37.25], [-57.25, -37.15], [-57.5, -37.25], [-58.03, -37.03], [-58.18, -36.68], [-58.25, -36.65], [-58.5, -36.75], [-59.03, -36.53], [-59.18, -36.18], [-59.53, -36.03], [-59.75, -35.5], [-59.53, -34.97], [-59.0, -34.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.52999999999997, -36.03], [-59.75, -35.5], [-59.52999999999997, -34.97], [-59.0, -34.75], [-58.69999999999999, -34.88], [-58.64999999999998, -34.75], [-58.75, -34.5], [-58.52999999999997, -33.97], [-58.0, -33.75], [-57.75, -33.85], [-57.5, -33.75], [-56.97000000000003, -33.97], [-56.75, -34.5], [-56.85000000000002, -34.75], [-56.81999999999999, -34.82], [-56.5, -34.96], [-56.0, -34.75], [-55.75, -34.85], [-55.5, -34.75], [-55.25, -34.85], [-55.0, -34.75], [-54.75, -34.85], [-54.5, -34.75], [-54.25, -34.85], [-54.0, -34.75], [-53.47000000000003, -34.97], [-53.25, -35.5], [-53.35000000000002, -35.75], [-53.25, -36.0], [-53.47000000000003, -36.53], [-54.0, -36.75], [-54.25, -36.65], [-54.31999999999999, -36.68], [-54.47000000000003, -37.03], [-55.0, -37.25], [-55.52999999999997, -37.03], [-55.68000000000001, -36.68], [-55.75, -36.65], [-56.0, 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-33.75], [-56.97000000000003, -33.97], [-56.75, -34.5], [-56.85000000000002, -34.75], [-56.75, -35.0], [-56.870000000000005, -35.3], [-56.47000000000003, -35.47], [-56.25, -36.0], [-56.47000000000003, -36.53], [-57.0, -36.75], [-57.52999999999997, -36.53], [-57.75, -36.0], [-57.620000000000005, -35.7], [-58.02999999999997, -35.53], [-58.25, -35.0], [-58.14999999999998, -34.75], [-58.25, -34.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.30023244511932}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6841222792073287}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.906897532145194, 19.16600845336916, 19.0430095926921, 20.220214674207966]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.625780995686853, 17.77835871378585, 18.211850738525413, 19.610134379069052]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.203709715768891, -2.933551204040393, -3.0191480652262497, -2.8171043840944208]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.30023244511932, -4.137198014501905, -4.986342791344498, -3.0992223302140474]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.8137414319297784, -1.5534947679381346, -1.605728347115952, -1.3864413388935166]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.285094964740546, -1.877044123502724, -2.32047711875796, -1.5105238546019268]}}