{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:11.077519", "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": "2021-Apr-18_to_2021-Apr-24_313.0_-21.0"}, "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": 2021040000751}, "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": "April 18 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 115209.4802418481}, "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", "S.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": []}, "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": -21.0}, "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": 313.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "313.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 309.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 315.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.03, -21.53], [-48.25, -21.0], [-48.03, -20.47], [-47.5, -20.25], [-47.25, -20.35], [-47.0, -20.25], [-46.47, -20.47], [-46.25, -21.0], [-46.37, -21.3], [-45.97, -21.47], [-45.75, -22.0], [-45.97, -22.53], [-46.5, -22.75], [-47.03, -22.53], [-47.25, -22.0], [-47.12, -21.7], [-47.25, -21.65], [-47.5, -21.75], [-48.03, -21.53]]]]}, "2021-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-49.53, -19.97], [-49.0, -19.75], [-48.57, -19.93], [-48.75, -19.5], [-48.53, -18.97], [-48.0, -18.75], [-47.47, -18.97], [-47.25, -19.5], [-47.37, -19.8], [-47.25, -19.85], [-47.0, -19.75], [-46.47, -19.97], [-46.25, -20.5], [-46.35, -20.75], [-46.25, -21.0], [-46.37, -21.3], [-45.97, -21.47], [-45.75, -22.0], [-45.97, -22.53], [-46.5, -22.75], [-47.03, -22.53], [-47.25, -22.0], [-47.12, -21.7], [-47.25, -21.65], [-47.5, -21.75], [-48.0, -21.54], [-48.5, -21.75], [-48.8, -21.62], [-48.97, -22.03], [-49.5, -22.25], [-50.03, -22.03], [-50.25, -21.5], [-50.03, -20.97], [-49.62, -20.8], [-49.75, -20.5], [-49.53, -19.97]]]]}, "2021-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.75, -20.5], [-50.53, -19.97], [-50.18, -19.82], [-50.03, -19.47], [-49.5, -19.25], [-49.25, -19.35], [-49.0, -19.25], [-48.75, -19.35], [-48.68, -19.32], [-48.53, -18.97], [-48.0, -18.75], [-47.47, -18.97], [-47.32, -19.32], [-47.25, -19.35], [-47.0, -19.25], [-46.47, -19.47], [-46.25, -20.0], [-46.35, -20.25], [-46.3, -20.38], [-46.0, -20.25], [-45.47, -20.47], [-45.25, -21.0], [-45.46, -21.5], [-45.32, -21.82], [-45.25, -21.85], [-45.0, -21.75], [-44.47, -21.97], [-44.25, -22.5], [-44.47, -23.03], [-45.0, -23.25], [-45.25, -23.15], [-45.32, -23.18], [-45.47, -23.53], [-46.0, -23.75], [-46.25, -23.65], [-46.5, -23.75], [-47.03, -23.53], [-47.25, -23.0], [-47.15, -22.75], [-47.25, -22.5], [-47.15, -22.25], [-47.25, -22.0], [-47.15, -21.75], [-47.18, -21.68], [-47.25, -21.65], [-47.5, -21.75], [-48.0, -21.54], [-48.5, -21.75], [-48.75, -21.65], [-48.82, -21.68], [-48.97, -22.03], [-49.5, -22.25], [-50.03, -22.03], [-50.25, -21.5], [-50.15, -21.25], [-50.18, -21.18], [-50.53, -21.03], [-50.75, -20.5]]]]}, "2021-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.53, -19.97], [-50.18, -19.82], [-50.03, -19.47], [-49.5, -19.25], [-49.25, -19.35], [-49.0, -19.25], [-48.75, -19.35], [-48.68, -19.32], [-48.53, -18.97], [-48.0, -18.75], [-47.47, -18.97], [-47.32, -19.32], [-47.25, -19.35], [-47.0, -19.25], [-46.47, -19.47], [-46.25, -20.0], [-46.35, -20.25], [-46.3, -20.38], [-46.0, -20.25], [-45.47, -20.47], [-45.25, -21.0], [-45.46, -21.5], [-45.32, -21.82], [-45.25, -21.85], [-45.0, -21.75], [-44.47, -21.97], [-44.25, -22.5], [-44.35, -22.75], [-44.25, -23.0], [-44.47, -23.53], [-45.0, -23.75], [-45.25, -23.65], [-45.5, -23.75], [-45.75, -23.65], [-46.0, -23.75], [-46.25, -23.65], [-46.5, -23.75], [-47.03, -23.53], [-47.18, -23.18], [-47.53, -23.03], [-47.75, -22.5], [-47.65, -22.25], [-47.68, -22.18], [-48.0, -22.04], [-48.5, -22.25], [-48.75, -22.15], [-49.0, -22.25], [-49.25, -22.15], [-49.5, -22.25], [-50.03, -22.03], [-50.18, -21.68], [-50.53, -21.53], [-50.75, -21.0], [-50.65, -20.75], [-50.75, -20.5], [-50.53, -19.97]]]]}, "2021-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.53, -19.97], [-50.18, -19.82], [-50.03, -19.47], [-49.5, -19.25], [-49.25, -19.35], [-49.0, -19.25], [-48.75, -19.35], [-48.68, -19.32], [-48.53, -18.97], [-48.0, -18.75], [-47.47, -18.97], [-47.32, -19.32], [-47.25, -19.35], [-47.0, -19.25], [-46.47, -19.47], [-46.25, -20.0], [-46.43, -20.43], [-46.0, -20.25], [-45.47, -20.47], [-45.25, -21.0], [-45.46, -21.5], [-45.32, -21.82], [-45.25, -21.85], [-45.0, -21.75], [-44.47, -21.97], [-44.25, -22.5], [-44.35, -22.75], [-44.25, -23.0], [-44.47, -23.53], [-45.0, -23.75], [-45.25, -23.65], [-45.5, -23.75], [-45.75, -23.65], [-46.0, -23.75], [-46.25, -23.65], [-46.5, -23.75], [-47.03, -23.53], [-47.18, -23.18], [-47.53, -23.03], [-47.75, -22.5], [-47.65, -22.25], [-47.68, -22.18], [-48.0, -22.04], [-48.5, -22.25], [-48.75, -22.15], [-49.0, -22.25], [-49.25, -22.15], [-49.5, -22.25], [-50.03, -22.03], [-50.18, -21.68], [-50.53, -21.53], [-50.75, -21.0], [-50.65, -20.75], [-50.75, -20.5], [-50.53, -19.97]]]]}, "2021-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.53, -19.97], [-50.18, -19.82], [-50.03, -19.47], [-49.5, -19.25], [-49.25, -19.35], [-49.0, -19.25], [-48.75, -19.35], [-48.68, -19.32], [-48.53, -18.97], [-48.0, -18.75], [-47.47, -18.97], [-47.32, -19.32], [-47.25, -19.35], [-47.0, -19.25], [-46.47, -19.47], [-46.25, -20.0], [-46.43, -20.43], [-46.0, -20.25], [-45.47, -20.47], [-45.25, -21.0], [-45.46, -21.5], [-45.32, -21.82], [-45.25, -21.85], [-45.0, -21.75], [-44.47, -21.97], [-44.25, -22.5], [-44.35, -22.75], [-44.25, -23.0], [-44.47, -23.53], [-45.0, -23.75], [-45.25, -23.65], [-45.5, -23.75], [-45.75, -23.65], [-46.0, -23.75], [-46.25, -23.65], [-46.5, -23.75], [-47.03, -23.53], [-47.18, -23.18], [-47.53, -23.03], [-47.75, -22.5], [-47.65, -22.25], [-47.68, -22.18], [-48.0, -22.04], [-48.5, -22.25], [-48.75, -22.15], [-49.0, -22.25], [-49.25, -22.15], [-49.5, -22.25], [-50.03, -22.03], [-50.18, -21.68], [-50.53, -21.53], [-50.75, -21.0], [-50.65, -20.75], [-50.75, -20.5], [-50.53, -19.97]]]]}, "2021-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.03, -19.97], [-49.68, -19.82], [-49.53, -19.47], [-49.0, -19.25], [-48.75, -19.35], [-48.5, -19.25], [-47.97, -19.47], [-47.82, -19.82], [-47.75, -19.85], [-47.5, -19.75], [-46.97, -19.97], [-46.82, -20.32], [-46.47, -20.47], [-46.32, -20.82], [-45.97, -20.97], [-45.75, -21.5], [-45.97, -22.03], [-46.5, -22.25], [-47.0, -22.04], [-47.5, -22.25], [-48.03, -22.03], [-48.2, -21.62], [-48.32, -21.68], [-48.47, -22.03], [-49.0, -22.25], [-49.53, -22.03], [-49.68, -21.68], [-50.03, -21.53], [-50.25, -21.0], [-50.15, -20.75], [-50.25, -20.5], [-50.03, -19.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.449272311851473}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.624014124233158}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.977605778426494, 20.507917590596207, 19.8044797968808, 19.739643632029583, 19.472815151109558, 19.372601380433537, 20.57484748903562]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.66673528460268, 17.51884682845838, 15.865944015693628, 15.436812379490618, 15.080890554039513, 15.372338269493582, 18.06030566109513]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2626729610325733, -2.32653629418686, -2.542910745638998, -2.580742974963748, -2.750532340761267, -2.7658911418879164, -2.4743697899354324]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5266141807850317, -2.611607998312479, -2.9147717603228784, -3.181666234774866, -3.449272311851473, -3.3529052603591367, -2.898292119039297]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4819827987594385, -1.4154426725871594, -1.5269328221420244, -1.4984917737149088, -1.5738509222067496, -1.5808690427974654, -1.366986016011667]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7101963400014866, -1.6289346950736792, -2.0053441500033156, -2.0967101001000854, -2.1670252595045163, -2.087972391007393, -1.5484033965821389]}}