{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:24.434150", "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": "2022-Dec-29_to_2022-Dec-31_184.0_-31.5"}, "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": 2022120001334}, "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 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2022"}, "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": 221152.79254741938}, "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": ["New Zealand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": ["Fleming Seamount", "Pacific 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": -31.5}, "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": 184.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "184.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 181.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 186.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-179.75, -30.0], [-179.53, -29.47], [-179.18, -29.32], [-179.03, -28.97], [-178.5, -28.75], [-177.97, -28.97], [-177.82, -29.32], [-177.47, -29.47], [-177.32, -29.82], [-177.25, -29.85], [-177.0, -29.75], [-176.75, -29.85], [-176.62, -29.8], [-176.75, -29.5], [-176.53, -28.97], [-176.0, -28.75], [-175.5, -28.96], [-175.18, -28.82], [-175.15, -28.75], [-175.25, -28.5], [-175.03, -27.97], [-174.5, -27.75], [-174.25, -27.85], [-174.0, -27.75], [-173.47, -27.97], [-173.25, -28.5], [-173.35, -28.75], [-173.25, -29.0], [-173.46, -29.5], [-173.32, -29.82], [-172.97, -29.97], [-172.75, -30.5], [-172.96, -31.0], [-172.75, -31.5], [-172.97, -32.03], [-173.32, -32.18], [-173.35, -32.25], [-173.25, -32.5], [-173.35, -32.75], [-173.25, -33.0], [-173.47, -33.53], [-173.82, -33.68], [-173.97, -34.03], [-174.32, -34.18], [-174.35, -34.25], [-174.25, -34.5], [-174.47, -35.03], [-175.0, -35.25], [-175.25, -35.15], [-175.5, -35.25], [-176.03, -35.03], [-176.18, -34.68], [-176.25, -34.65], [-176.5, -34.75], [-177.03, -34.53], [-177.18, -34.18], [-177.53, -34.03], [-177.75, -33.5], [-177.65, -33.25], [-177.68, -33.18], [-178.03, -33.03], [-178.18, -32.68], [-178.53, -32.53], [-178.68, -32.18], [-179.03, -32.03], [-179.18, -31.68], [-179.53, -31.53], [-179.75, -31.0], [-179.65, -30.75], [-179.75, -30.5], [-179.65, -30.25], [-179.75, -30.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-179.75, -30.5], [-179.65, -30.25], [-179.75, -30.0], [-179.53, -29.47], [-179.18, -29.32], [-179.03, -28.97], [-178.5, -28.75], [-177.97, -28.97], [-177.82, -29.32], [-177.47, -29.47], [-177.32, -29.82], [-177.25, -29.85], [-177.0, -29.75], [-176.75, -29.85], [-176.62, -29.8], [-176.75, -29.5], [-176.53, -28.97], [-176.0, -28.75], [-175.5, -28.96], [-175.18, -28.82], [-175.15, -28.75], [-175.25, -28.5], [-175.03, -27.97], [-174.5, -27.75], [-174.25, -27.85], [-174.0, -27.75], [-173.47, -27.97], [-173.25, -28.5], [-173.35, -28.75], [-173.25, -29.0], [-173.46, -29.5], [-173.32, -29.82], [-172.97, -29.97], [-172.75, -30.5], [-172.96, -31.0], [-172.75, -31.5], [-172.97, -32.03], [-173.32, -32.18], [-173.35, -32.25], [-173.25, -32.5], [-173.35, -32.75], [-173.25, -33.0], [-173.47, -33.53], [-173.82, -33.68], [-173.97, -34.03], [-174.32, -34.18], [-174.35, -34.25], [-174.25, -34.5], [-174.47, -35.03], [-175.0, -35.25], [-175.25, -35.15], [-175.5, -35.25], [-176.03, -35.03], [-176.18, -34.68], [-176.25, -34.65], [-176.5, -34.75], [-177.03, -34.53], [-177.18, -34.18], [-177.53, -34.03], [-177.75, -33.5], [-177.65, -33.25], [-177.68, -33.18], [-178.03, -33.03], [-178.18, -32.68], [-178.53, -32.53], [-178.68, -32.18], [-179.03, -32.03], [-179.18, -31.68], [-179.53, -31.53], [-179.75, -31.0], [-179.65, -30.75], [-179.75, -30.5]]]]}, "2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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-29.5], [-173.32, -29.82], [-172.97, -29.97], [-172.75, -30.5], [-172.96, -31.0], [-172.75, -31.5], [-172.97, -32.03], [-173.32, -32.18], [-173.35, -32.25], [-173.25, -32.5], [-173.35, -32.75], [-173.25, -33.0], [-173.47, -33.53], [-173.82, -33.68], [-173.97, -34.03], [-174.32, -34.18], [-174.35, -34.25], [-174.25, -34.5], [-174.47, -35.03], [-175.0, -35.25], [-175.25, -35.15], [-175.5, -35.25], [-176.03, -35.03], [-176.18, -34.68], [-176.25, -34.65], [-176.5, -34.75], [-177.03, -34.53], [-177.18, -34.18], [-177.53, -34.03], [-177.75, -33.5], [-177.65, -33.25], [-177.68, -33.18], [-178.03, -33.03], [-178.18, -32.68], [-178.53, -32.53], [-178.68, -32.18], [-179.03, -32.03], [-179.18, -31.68], [-179.53, -31.53], [-179.75, -31.0], [-179.65, -30.75], [-179.75, -30.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1131851467774823}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6694547547293972}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.03074305985018, 18.853861113460425, 19.129904284708743]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.52776193153528, 17.41927187765765, 17.786925128562245]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5923631799409903, -1.8207345435137958, -1.5952665407334052]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9432925323191057, -2.1131851467774823, -1.9601786619167]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3841696639347132, -1.6249962920457184, -1.482370979318435]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6680055174609707, -1.865025473957098, -1.783774070116672]}}