{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:57.050699", "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": "2024-Dec-05_to_2024-Dec-08_311.0_-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": 2024120000157}, "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 05 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 08 2024"}, "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": 308999.63851388975}, "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", "N.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": ["North Atlantic Ocean", "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": -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": 311.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "311.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 312.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.53, 1.53], [-54.18, 1.68], [-54.03, 2.03], [-53.5, 2.25], [-53.25, 2.15], [-53.0, 2.25], [-52.75, 2.15], [-52.5, 2.25], [-52.25, 2.15], [-52.18, 2.18], [-52.03, 2.53], [-51.68, 2.68], [-51.53, 3.03], [-51.0, 3.25], [-50.47, 3.03], [-50.32, 2.68], [-49.97, 2.53], [-49.82, 2.18], [-49.47, 2.03], [-49.25, 1.5], [-49.35, 1.25], [-49.25, 1.0], [-49.37, 0.7], [-48.97, 0.53], [-48.82, 0.18], [-48.75, 0.15], [-48.5, 0.25], [-48.25, 0.15], [-48.0, 0.25], [-47.75, 0.15], [-47.5, 0.25], [-46.97, 0.03], [-46.75, -0.5], [-46.85, -0.75], [-46.75, -1.0], [-46.97, -1.53], [-47.32, -1.68], [-47.47, -2.03], [-48.0, -2.25], [-48.25, -2.15], [-48.32, -2.18], [-48.35, -2.25], [-48.25, -2.5], [-48.46, -3.0], [-48.25, -3.5], [-48.47, -4.03], [-49.0, -4.25], [-49.53, -4.03], [-49.68, -3.68], [-49.75, -3.65], [-50.0, -3.75], [-50.25, -3.65], [-50.5, -3.75], [-51.03, -3.53], [-51.18, -3.18], [-51.25, -3.15], [-51.5, -3.25], [-52.03, -3.03], [-52.18, -2.68], [-52.25, -2.65], [-52.5, -2.75], [-53.03, -2.53], [-53.25, -2.0], [-53.03, -1.47], [-52.68, -1.32], [-52.57, -1.07], [-53.0, -1.25], [-53.25, -1.15], [-53.5, -1.25], [-53.75, -1.15], [-54.0, -1.25], [-54.53, -1.03], [-54.75, -0.5], [-54.54, -0.0], [-54.75, 0.5], [-54.65, 0.75], [-54.75, 1.0], [-54.53, 1.53]], [[-52.18, -0.82], [-52.15, -0.75], [-52.18, -0.68], [-52.25, -0.65], [-52.32, -0.68], [-52.43, -0.93], [-52.18, -0.82]]]]}, "2024-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 0.0], [-55.03, 0.53], [-54.68, 0.68], [-54.65, 0.75], [-54.68, 0.82], [-55.03, 0.97], [-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.0, 2.25], [-53.75, 2.15], [-53.5, 2.25], [-53.25, 2.15], [-53.0, 2.25], [-52.75, 2.15], [-52.5, 2.25], [-52.25, 2.15], [-52.18, 2.18], [-52.03, 2.53], [-51.68, 2.68], [-51.53, 3.03], [-51.0, 3.25], [-50.47, 3.03], [-50.32, 2.68], [-49.97, 2.53], [-49.82, 2.18], [-49.47, 2.03], [-49.25, 1.5], [-49.35, 1.25], [-49.25, 1.0], [-49.37, 0.7], [-48.97, 0.53], [-48.82, 0.18], [-48.75, 0.15], [-48.5, 0.25], [-48.25, 0.15], [-48.0, 0.25], [-47.75, 0.15], [-47.5, 0.25], [-46.97, 0.03], [-46.75, -0.5], [-46.85, -0.75], [-46.75, -1.0], [-46.97, -1.53], [-47.32, -1.68], [-47.47, -2.03], [-48.0, -2.25], [-48.25, -2.15], [-48.32, -2.18], [-48.35, -2.25], [-48.32, -2.32], [-47.97, -2.47], [-47.82, -2.82], [-47.47, -2.97], [-47.25, -3.5], [-47.47, -4.03], [-48.0, -4.25], [-48.5, -4.04], [-49.0, -4.25], [-49.53, -4.03], [-49.68, -3.68], [-49.75, -3.65], [-50.0, -3.75], [-50.25, -3.65], [-50.5, -3.75], [-51.03, -3.53], [-51.18, -3.18], [-51.25, -3.15], [-51.5, -3.25], [-52.03, -3.03], [-52.18, -2.68], [-52.25, -2.65], [-52.5, -2.75], [-53.03, -2.53], [-53.25, -2.0], [-53.15, -1.75], [-53.18, -1.68], [-53.25, -1.65], [-53.5, -1.75], [-53.75, -1.65], [-54.0, -1.75], [-54.53, -1.53], [-54.75, -1.0], [-54.65, -0.75], [-54.68, -0.68], [-55.03, -0.53], [-55.25, 0.0]]]]}, "2024-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 0.0], [-55.03, 0.53], [-54.68, 0.68], [-54.65, 0.75], [-54.68, 0.82], [-55.03, 0.97], [-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.0, 2.25], [-53.75, 2.15], [-53.5, 2.25], [-53.25, 2.15], [-53.0, 2.25], [-52.75, 2.15], [-52.5, 2.25], [-52.25, 2.15], [-52.18, 2.18], [-52.03, 2.53], [-51.68, 2.68], [-51.53, 3.03], [-51.0, 3.25], [-50.47, 3.03], [-50.32, 2.68], [-49.97, 2.53], [-49.82, 2.18], [-49.47, 2.03], [-49.25, 1.5], [-49.35, 1.25], [-49.25, 1.0], [-49.37, 0.7], [-48.97, 0.53], [-48.82, 0.18], [-48.75, 0.15], [-48.5, 0.25], [-48.25, 0.15], [-48.0, 0.25], [-47.75, 0.15], [-47.5, 0.25], [-46.97, 0.03], [-46.75, -0.5], [-46.85, -0.75], [-46.75, -1.0], [-46.97, -1.53], [-47.32, -1.68], [-47.47, -2.03], [-48.0, -2.25], [-48.25, -2.15], [-48.32, -2.18], [-48.35, -2.25], [-48.32, -2.32], [-47.97, -2.47], [-47.82, -2.82], [-47.47, -2.97], [-47.25, -3.5], [-47.47, -4.03], [-48.0, -4.25], [-48.5, -4.04], [-49.0, -4.25], [-49.53, -4.03], [-49.68, -3.68], [-49.75, -3.65], [-50.0, -3.75], [-50.25, -3.65], [-50.5, -3.75], [-51.03, -3.53], [-51.18, -3.18], [-51.25, -3.15], [-51.5, -3.25], [-52.03, -3.03], [-52.18, -2.68], [-52.25, -2.65], [-52.5, -2.75], [-53.03, -2.53], [-53.25, -2.0], [-53.15, -1.75], [-53.18, -1.68], [-53.25, -1.65], [-53.5, -1.75], [-53.75, -1.65], [-54.0, -1.75], [-54.53, -1.53], [-54.75, -1.0], [-54.65, -0.75], [-54.68, -0.68], [-55.03, -0.53], [-55.25, 0.0]]]]}, "2024-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 0.0], [-55.03, 0.53], [-54.68, 0.68], [-54.62, 0.8], [-55.03, 0.97], [-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.0, 2.25], [-53.75, 2.15], [-53.5, 2.25], [-53.25, 2.15], [-53.0, 2.25], [-52.75, 2.15], [-52.5, 2.25], [-52.25, 2.15], [-52.0, 2.25], [-51.75, 2.15], [-51.5, 2.25], [-50.97, 2.03], [-50.75, 1.5], [-50.85, 1.25], [-50.82, 1.18], [-50.75, 1.15], [-50.5, 1.25], [-49.97, 1.03], [-49.82, 0.68], [-49.47, 0.53], [-49.32, 0.18], [-49.25, 0.15], [-49.0, 0.25], [-48.47, 0.03], [-48.32, -0.32], [-47.97, -0.47], [-47.75, -1.0], [-47.85, -1.25], [-47.75, -1.5], [-47.97, -2.03], [-48.5, -2.25], [-47.97, -2.47], [-47.82, -2.82], [-47.47, -2.97], [-47.25, -3.5], [-47.47, -4.03], [-48.0, -4.25], [-48.5, -4.04], [-49.0, -4.25], [-49.53, -4.03], [-49.68, -3.68], [-49.75, -3.65], [-50.0, -3.75], [-50.53, -3.53], [-50.68, -3.18], [-50.75, -3.15], [-51.0, -3.25], [-51.25, -3.15], [-51.5, -3.25], [-52.03, -3.03], [-52.18, -2.68], [-52.53, -2.53], [-52.68, -2.18], [-53.03, -2.03], [-53.18, -1.68], [-53.25, -1.65], [-53.5, -1.75], [-53.75, -1.65], [-54.0, -1.75], [-54.53, -1.53], [-54.75, -1.0], [-54.65, -0.75], [-54.68, -0.68], [-55.03, -0.53], [-55.25, 0.0]], [[-49.0, -2.04], [-49.37, -2.2], [-49.32, -2.32], [-49.25, -2.35], [-49.0, -2.25], [-48.75, -2.35], [-48.5, -2.25], [-49.0, -2.04]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.565775023634842}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0744836757943688}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.819019856172474, 25.296356608072927, 25.334645640055328, 25.631268411575434]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.977312978108728, 23.55597330729171, 22.92849248250326, 23.36264572143557]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8201679738371614, -2.2870688607172496, -2.2095203101146415, -1.8944104256854286]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.75445385731598, -3.3981601369551413, -3.565775023634842, -2.8187499449138613]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8290349259774723, -2.220874461350034, -2.1550649302367173, -1.7127445576477685]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5482888538458752, -3.1296533387503733, -3.0536932100956773, -2.121130616853066]}}