{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:42.218789", "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-04_to_2026-Jan-06_308.0_-27.5"}, "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": 2026010000189}, "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 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 93778.87250008028}, "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": -27.5}, "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": 308.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "308.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-54.15, -26.25], [-54.25, -26.0], [-54.03, -25.47], [-53.5, -25.25], [-53.25, -25.35], [-53.0, -25.25], [-52.47, -25.47], [-52.25, -26.0], [-52.35, -26.25], [-52.32, -26.32], [-52.2, -26.38], [-52.03, -25.97], [-51.5, -25.75], [-50.97, -25.97], [-50.82, -26.32], [-50.47, -26.47], [-50.32, -26.82], [-50.2, -26.88], [-50.15, -26.75], [-50.25, -26.5], [-50.15, -26.25], [-50.25, -26.0], [-50.15, -25.75], [-50.25, -25.5], [-50.03, -24.97], [-49.5, -24.75], [-49.25, -24.85], [-49.18, -24.82], [-49.03, -24.47], [-48.5, -24.25], [-47.97, -24.47], [-47.75, -25.0], [-47.85, -25.25], [-47.75, -25.5], [-47.85, -25.75], [-47.75, -26.0], [-47.85, -26.25], [-47.75, -26.5], [-47.97, -27.03], [-48.32, -27.18], [-48.35, -27.25], [-48.25, -27.5], [-48.47, -28.03], [-49.0, -28.25], [-49.25, -28.15], [-49.32, -28.18], [-49.47, -28.53], [-50.0, -28.75], [-50.25, -28.65], [-50.5, -28.75], [-50.75, -28.65], [-51.0, -28.75], [-51.25, -28.65], [-51.5, -28.75], [-52.03, -28.53], [-52.18, -28.18], [-52.25, -28.15], [-52.5, -28.25], [-52.75, -28.15], [-53.0, -28.25], [-53.25, -28.15], [-53.5, -28.25], [-53.75, -28.15], [-54.0, -28.25], [-54.53, -28.03], [-54.75, -27.5], [-54.53, -26.97], [-54.18, -26.82], [-54.15, -26.75], [-54.25, -26.5], [-54.15, -26.25]]]]}}, "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": {"2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.14999999999998, -26.75], [-54.25, -26.5], [-54.14999999999998, -26.25], [-54.25, -26.0], [-54.02999999999997, -25.47], [-53.5, -25.25], [-53.25, -25.35], [-53.0, -25.25], [-52.47000000000003, -25.47], [-52.25, -26.0], [-52.35000000000002, -26.25], [-52.31999999999999, -26.32], [-52.19999999999999, -26.38], [-52.02999999999997, -25.97], [-51.5, -25.75], [-50.97000000000003, -25.97], [-50.81999999999999, -26.32], [-50.47000000000003, -26.47], [-50.31999999999999, -26.82], [-50.19999999999999, -26.88], [-50.14999999999998, -26.75], [-50.25, -26.5], [-50.14999999999998, -26.25], [-50.25, -26.0], [-50.14999999999998, -25.75], [-50.25, -25.5], [-50.02999999999997, -24.97], [-49.5, -24.75], [-49.25, -24.85], [-49.18000000000001, -24.82], [-49.02999999999997, -24.47], [-48.5, -24.25], [-47.97000000000003, -24.47], [-47.75, -25.0], [-47.85000000000002, -25.25], [-47.75, -25.5], [-47.85000000000002, -25.75], [-47.75, -26.0], [-47.85000000000002, -26.25], [-47.75, -26.5], [-47.97000000000003, -27.03], [-48.31999999999999, -27.18], [-48.35000000000002, -27.25], [-48.25, -27.5], [-48.47000000000003, -28.03], [-49.0, -28.25], [-49.25, -28.15], [-49.31999999999999, -28.18], [-49.47000000000003, -28.53], [-50.0, -28.75], [-50.25, -28.65], [-50.5, -28.75], [-50.75, -28.65], [-51.0, -28.75], [-51.25, -28.65], [-51.5, -28.75], [-52.02999999999997, -28.53], [-52.18000000000001, -28.18], [-52.25, -28.15], [-52.5, -28.25], [-52.75, -28.15], [-53.0, -28.25], [-53.25, -28.15], [-53.5, -28.25], [-53.75, 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"coordinates": [[[[-54.14999999999998, -26.75], [-54.25, -26.5], [-54.14999999999998, -26.25], [-54.25, -26.0], [-54.02999999999997, -25.47], [-53.5, -25.25], [-53.25, -25.35], [-53.0, -25.25], [-52.47000000000003, -25.47], [-52.25, -26.0], [-52.35000000000002, -26.25], [-52.31999999999999, -26.32], [-52.19999999999999, -26.38], [-52.02999999999997, -25.97], [-51.5, -25.75], [-50.97000000000003, -25.97], [-50.81999999999999, -26.32], [-50.47000000000003, -26.47], [-50.31999999999999, -26.82], [-50.19999999999999, -26.88], [-50.14999999999998, -26.75], [-50.25, -26.5], [-50.14999999999998, -26.25], [-50.25, -26.0], [-50.14999999999998, -25.75], [-50.25, -25.5], [-50.02999999999997, -24.97], [-49.5, -24.75], [-49.25, -24.85], [-49.18000000000001, -24.82], [-49.02999999999997, -24.47], [-48.5, -24.25], [-47.97000000000003, -24.47], [-47.75, -25.0], [-47.85000000000002, -25.25], [-47.75, -25.5], [-47.85000000000002, -25.75], [-47.75, -26.0], [-47.85000000000002, -26.25], [-47.75, -26.5], 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{"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.47861655740178, 18.107014629887658, 20.393248120476244]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.21427688598635, 14.559926605224632, 16.18399327596029]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.126512293476047, -4.551437831830591, -2.3534459555436977]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.177024658956213, -5.869122268443618, -3.644174317461477]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.532642383552156, -2.767871094395918, -1.3742783813887836]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.8310505410453963, -3.748288324706694, -1.748298409922764]}}