{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:24.471588", "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": "2023-Jan-23_to_2023-Jan-27_172.0_-71.5"}, "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": 2023010001069}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 56386.48908896387}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Ross Sea", "Southern 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": -71.5}, "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": 172.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "172.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 169.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 175.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -72.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -69.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[174.03, -72.03], [173.5, -72.25], [173.25, -72.15], [173.18, -72.18], [173.03, -72.53], [172.5, -72.75], [172.25, -72.65], [172.0, -72.75], [171.75, -72.65], [171.68, -72.68], [171.53, -73.03], [171.0, -73.25], [170.75, -73.15], [170.5, -73.25], [169.97, -73.03], [169.8, -72.62], [169.5, -72.75], [168.97, -72.53], [168.75, -72.0], [168.97, -71.47], [169.32, -71.32], [169.35, -71.25], [169.25, -71.0], [169.38, -70.7], [169.25, -70.65], [169.0, -70.75], [168.47, -70.53], [168.25, -70.0], [168.35, -69.75], [168.25, -69.5], [168.47, -68.97], [169.0, -68.75], [169.25, -68.85], [169.5, -68.75], [169.75, -68.85], [170.0, -68.75], [170.25, -68.85], [170.5, -68.75], [170.75, -68.85], [170.82, -68.82], [170.97, -68.47], [171.5, -68.25], [171.75, -68.35], [172.0, -68.25], [172.25, -68.35], [172.5, -68.25], [173.03, -68.47], [173.18, -68.82], [173.53, -68.97], [173.68, -69.32], [174.03, -69.47], [174.18, -69.82], [174.25, -69.85], [174.5, -69.75], [174.75, -69.85], [175.0, -69.75], [175.53, -69.97], [175.75, -70.5], [175.53, -71.03], [175.0, -71.25], [174.75, -71.15], [174.68, -71.18], [174.53, -71.53], [174.18, -71.68], [174.03, -72.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[168.25, -69.5], [168.47, -68.97], [169.0, -68.75], [169.25, -68.85], [169.5, -68.75], [169.75, -68.85], [170.0, -68.75], [170.25, -68.85], [170.5, -68.75], [170.75, -68.85], [170.82, -68.82], [170.97, -68.47], [171.5, -68.25], [171.75, -68.35], [172.0, -68.25], [172.25, -68.35], [172.5, -68.25], [173.03, -68.47], [173.18, -68.82], [173.53, -68.97], [173.68, -69.32], [174.03, -69.47], [174.18, -69.82], [174.25, -69.85], [174.5, -69.75], [174.75, -69.85], [175.0, -69.75], [175.53, -69.97], [175.75, -70.5], [175.53, -71.03], [175.0, -71.25], [174.75, -71.15], [174.68, -71.18], [174.53, -71.53], [174.18, -71.68], [174.03, 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-3.11485683570055]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-14.368343327239756, -14.696707733230994, -14.49049201218179, -4.560235039402528, -4.950679718211234]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0054609440422964, -1.2772372139790098, -1.066203115860898, -0.8542960052470315, -1.010229502480584]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5321006033670983, -3.638978515770532, -3.261120445561005, -1.286944071280061, -1.593029391027244]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4956847630783556, -1.8735004229183732, -1.5661302313569991, -1.401642595696036, -1.5696688949396387]}, 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