{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:04.967364", "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-Mar-18_to_2023-Mar-20_222.5_-74.5"}, "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": 2023030002068}, "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": "March 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2023"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 116073.37637767782}, "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": -74.5}, "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": 222.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "222.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 213.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 228.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -75.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -71.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-147.25, -75.0], [-147.03, -74.47], [-146.5, -74.25], [-146.25, -74.35], [-146.0, -74.25], [-145.75, -74.35], [-145.62, -74.3], [-145.75, -74.0], [-145.53, -73.47], [-145.18, -73.32], [-145.03, -72.97], [-144.5, -72.75], [-144.25, -72.85], [-144.0, -72.75], [-143.75, -72.85], [-143.5, -72.75], [-143.25, -72.85], [-143.0, -72.75], [-142.75, -72.85], [-142.68, -72.82], [-142.53, -72.47], [-142.0, -72.25], [-141.75, -72.35], [-141.5, -72.25], [-141.25, -72.35], [-141.0, -72.25], [-140.75, -72.35], [-140.5, -72.25], [-140.25, -72.35], [-140.18, -72.32], [-140.03, -71.97], [-139.5, -71.75], [-139.25, -71.85], [-139.0, -71.75], [-138.75, -71.85], [-138.5, -71.75], [-138.25, -71.85], [-138.0, -71.75], [-137.75, -71.85], [-137.68, -71.82], [-137.53, -71.47], [-137.0, -71.25], [-136.75, -71.35], [-136.5, -71.25], [-136.25, -71.35], [-136.0, -71.25], [-135.75, -71.35], [-135.68, -71.32], [-135.53, -70.97], [-135.0, -70.75], [-134.75, -70.85], [-134.5, -70.75], [-134.25, -70.85], [-134.0, -70.75], [-133.75, -70.85], [-133.5, -70.75], [-133.25, -70.85], [-133.0, -70.75], [-132.5, -70.96], [-132.0, -70.75], [-131.75, -70.85], [-131.5, -70.75], [-130.97, -70.97], [-130.75, -71.5], [-130.97, -72.03], [-131.32, -72.18], [-131.35, -72.25], [-131.25, -72.5], [-131.47, -73.03], [-131.82, -73.18], [-131.85, -73.25], [-131.75, -73.5], [-131.97, -74.03], [-132.5, -74.25], [-132.75, -74.15], [-133.0, -74.25], [-133.25, -74.15], [-133.5, -74.25], [-133.75, -74.15], [-134.0, -74.25], [-134.25, -74.15], [-134.5, -74.25], [-134.75, -74.15], [-135.0, -74.25], [-135.25, -74.15], [-135.32, -74.18], [-135.47, -74.53], [-136.0, -74.75], [-136.25, -74.65], [-136.32, -74.68], [-136.47, -75.03], [-137.0, -75.25], [-137.25, -75.15], [-137.32, -75.18], [-137.47, -75.53], [-138.0, -75.75], [-138.25, -75.65], [-138.5, -75.75], [-138.75, -75.65], [-139.0, -75.75], [-139.25, -75.65], [-139.5, -75.75], [-139.75, -75.65], [-140.0, -75.75], [-140.25, -75.65], [-140.5, -75.75], [-140.75, -75.65], [-141.0, -75.75], [-141.25, -75.65], [-141.5, -75.75], [-141.75, -75.65], [-142.0, -75.75], [-142.25, -75.65], [-142.5, -75.75], [-142.75, -75.65], [-143.0, -75.75], [-143.25, -75.65], [-143.5, -75.75], [-143.75, -75.65], [-144.0, -75.75], [-144.25, -75.65], [-144.5, -75.75], [-144.75, -75.65], [-145.0, -75.75], [-145.25, -75.65], [-145.5, -75.75], [-145.75, -75.65], [-146.0, -75.75], [-146.25, -75.65], [-146.5, -75.75], [-147.03, -75.53], [-147.25, -75.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-146.5, -75.75], [-147.03, -75.53], [-147.25, -75.0], [-147.03, -74.47], [-146.5, -74.25], [-146.25, -74.35], [-146.0, -74.25], [-145.75, -74.35], [-145.62, -74.3], [-145.75, -74.0], [-145.53, -73.47], [-145.18, -73.32], [-145.03, -72.97], [-144.5, -72.75], [-144.25, -72.85], [-144.0, -72.75], [-143.75, -72.85], [-143.5, -72.75], [-143.25, -72.85], [-143.0, -72.75], [-142.75, -72.85], [-142.68, -72.82], [-142.53, -72.47], [-142.0, -72.25], [-141.75, -72.35], [-141.5, -72.25], [-141.25, -72.35], [-141.0, -72.25], [-140.75, -72.35], [-140.5, -72.25], [-140.25, -72.35], [-140.18, -72.32], [-140.03, -71.97], [-139.5, -71.75], [-139.25, -71.85], [-139.0, -71.75], [-138.75, -71.85], [-138.5, -71.75], [-138.25, -71.85], [-138.0, -71.75], [-137.75, -71.85], [-137.68, -71.82], [-137.53, -71.47], [-137.0, -71.25], [-136.75, -71.35], [-136.5, -71.25], [-136.25, -71.35], [-136.0, -71.25], [-135.75, -71.35], [-135.68, -71.32], [-135.53, -70.97], [-135.0, -70.75], [-134.75, -70.85], [-134.5, -70.75], [-134.25, -70.85], [-134.0, -70.75], [-133.75, -70.85], [-133.5, -70.75], [-133.25, -70.85], [-133.0, -70.75], [-132.5, -70.96], [-132.0, -70.75], [-131.75, -70.85], [-131.5, -70.75], [-130.97, -70.97], [-130.75, -71.5], [-130.97, -72.03], [-131.32, -72.18], [-131.35, -72.25], [-131.25, -72.5], [-131.47, -73.03], [-131.82, -73.18], [-131.85, -73.25], [-131.75, -73.5], [-131.97, -74.03], [-132.5, -74.25], [-132.75, -74.15], [-133.0, -74.25], [-133.25, -74.15], [-133.5, -74.25], [-133.75, -74.15], [-134.0, -74.25], [-134.25, -74.15], [-134.5, -74.25], [-134.75, -74.15], [-135.0, -74.25], [-135.25, -74.15], [-135.32, -74.18], [-135.47, -74.53], [-136.0, -74.75], [-136.25, -74.65], [-136.32, -74.68], [-136.47, -75.03], [-137.0, -75.25], [-137.25, -75.15], [-137.32, -75.18], [-137.47, -75.53], [-138.0, -75.75], [-138.25, -75.65], [-138.5, -75.75], [-138.75, -75.65], [-139.0, -75.75], [-139.25, -75.65], [-139.5, -75.75], [-139.75, -75.65], [-140.0, -75.75], [-140.25, -75.65], [-140.5, -75.75], [-140.75, -75.65], [-141.0, -75.75], [-141.25, -75.65], [-141.5, -75.75], [-141.75, -75.65], [-142.0, -75.75], [-142.25, -75.65], [-142.5, -75.75], [-142.75, -75.65], [-143.0, -75.75], [-143.25, -75.65], [-143.5, -75.75], [-143.75, -75.65], [-144.0, -75.75], [-144.25, -75.65], [-144.5, -75.75], [-144.75, -75.65], [-145.0, -75.75], [-145.25, -75.65], [-145.5, -75.75], [-145.75, -75.65], [-146.0, -75.75], [-146.25, -75.65], [-146.5, -75.75]]]]}, "2023-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-146.5, -75.75], [-147.03, -75.53], [-147.25, -75.0], [-147.03, -74.47], [-146.5, -74.25], [-146.25, -74.35], [-146.0, -74.25], [-145.75, -74.35], [-145.62, -74.3], [-145.75, -74.0], [-145.53, -73.47], [-145.18, -73.32], [-145.03, -72.97], [-144.5, -72.75], [-144.25, -72.85], [-144.0, -72.75], [-143.75, -72.85], [-143.5, -72.75], [-143.25, -72.85], [-143.0, -72.75], [-142.75, -72.85], [-142.68, -72.82], [-142.53, -72.47], [-142.0, -72.25], [-141.75, -72.35], [-141.5, -72.25], [-141.25, -72.35], [-141.0, -72.25], [-140.75, -72.35], [-140.5, -72.25], [-140.25, -72.35], [-140.18, -72.32], [-140.03, -71.97], [-139.5, -71.75], [-139.25, -71.85], [-139.0, -71.75], [-138.75, -71.85], [-138.5, -71.75], [-138.25, -71.85], [-138.0, -71.75], [-137.75, -71.85], [-137.68, -71.82], [-137.53, -71.47], [-137.0, -71.25], [-136.75, -71.35], [-136.5, -71.25], [-136.25, -71.35], [-136.0, -71.25], [-135.75, -71.35], [-135.68, -71.32], [-135.53, -70.97], [-135.0, -70.75], [-134.75, -70.85], [-134.5, -70.75], [-134.25, -70.85], [-134.0, -70.75], [-133.75, -70.85], [-133.5, -70.75], [-133.25, -70.85], [-133.0, -70.75], [-132.5, -70.96], [-132.0, -70.75], [-131.75, -70.85], [-131.5, -70.75], [-130.97, -70.97], [-130.75, -71.5], [-130.97, -72.03], [-131.32, -72.18], [-131.35, -72.25], [-131.25, -72.5], [-131.47, -73.03], [-131.82, -73.18], [-131.85, -73.25], [-131.75, -73.5], [-131.97, -74.03], [-132.5, -74.25], [-132.75, -74.15], [-133.0, -74.25], [-133.25, -74.15], [-133.5, -74.25], [-133.75, -74.15], [-134.0, -74.25], [-134.25, -74.15], [-134.5, -74.25], [-134.75, -74.15], [-135.0, -74.25], [-135.25, -74.15], [-135.32, -74.18], [-135.47, -74.53], [-136.0, -74.75], [-136.25, -74.65], [-136.32, -74.68], [-136.47, -75.03], [-137.0, -75.25], [-137.25, -75.15], [-137.32, -75.18], [-137.47, -75.53], [-138.0, -75.75], [-138.25, -75.65], [-138.5, -75.75], [-138.75, -75.65], [-139.0, -75.75], [-139.25, -75.65], [-139.5, -75.75], [-139.75, -75.65], [-140.0, -75.75], [-140.25, -75.65], [-140.5, -75.75], [-140.75, -75.65], [-141.0, -75.75], [-141.25, -75.65], [-141.5, -75.75], [-141.75, -75.65], [-142.0, -75.75], [-142.25, -75.65], [-142.5, -75.75], [-142.75, -75.65], [-143.0, -75.75], [-143.25, -75.65], [-143.5, -75.75], [-143.75, -75.65], [-144.0, -75.75], [-144.25, -75.65], [-144.5, -75.75], [-144.75, -75.65], [-145.0, -75.75], [-145.25, -75.65], [-145.5, -75.75], [-145.75, -75.65], [-146.0, -75.75], [-146.25, -75.65], [-146.5, -75.75]]]]}, "2023-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-146.5, -75.75], [-147.03, -75.53], [-147.25, -75.0], [-147.03, -74.47], [-146.5, -74.25], [-146.25, -74.35], [-146.0, -74.25], [-145.75, -74.35], [-145.62, -74.3], [-145.75, -74.0], [-145.53, -73.47], [-145.18, -73.32], [-145.03, -72.97], [-144.5, -72.75], [-144.25, -72.85], [-144.0, -72.75], [-143.75, -72.85], [-143.5, -72.75], [-143.25, -72.85], [-143.0, -72.75], [-142.75, -72.85], [-142.68, -72.82], [-142.53, -72.47], [-142.0, -72.25], [-141.75, -72.35], [-141.5, -72.25], [-141.25, -72.35], [-141.0, -72.25], [-140.75, -72.35], [-140.5, -72.25], [-140.25, -72.35], [-140.18, -72.32], [-140.03, -71.97], [-139.5, -71.75], [-139.25, -71.85], [-139.0, -71.75], [-138.75, -71.85], [-138.5, -71.75], [-138.25, -71.85], [-138.0, -71.75], [-137.75, -71.85], [-137.68, -71.82], [-137.53, -71.47], [-137.0, -71.25], [-136.75, -71.35], [-136.5, -71.25], [-136.25, -71.35], [-136.0, -71.25], [-135.75, -71.35], [-135.68, -71.32], [-135.53, -70.97], [-135.0, -70.75], [-134.75, -70.85], [-134.5, -70.75], [-134.25, -70.85], [-134.0, -70.75], [-133.75, -70.85], [-133.5, -70.75], [-133.25, -70.85], [-133.0, -70.75], [-132.5, -70.96], [-132.0, -70.75], [-131.75, -70.85], [-131.5, -70.75], [-130.97, -70.97], [-130.75, -71.5], [-130.97, -72.03], [-131.32, -72.18], [-131.35, -72.25], [-131.25, -72.5], [-131.47, -73.03], [-131.82, -73.18], [-131.85, -73.25], [-131.75, -73.5], [-131.97, -74.03], [-132.5, -74.25], [-132.75, -74.15], [-133.0, -74.25], [-133.25, -74.15], [-133.5, -74.25], [-133.75, -74.15], [-134.0, -74.25], [-134.25, -74.15], [-134.5, -74.25], [-134.75, -74.15], [-135.0, -74.25], [-135.25, -74.15], [-135.32, -74.18], [-135.47, -74.53], [-136.0, -74.75], [-136.25, -74.65], [-136.32, -74.68], [-136.47, -75.03], [-137.0, -75.25], [-137.25, -75.15], [-137.32, -75.18], [-137.47, -75.53], [-138.0, -75.75], [-138.25, -75.65], [-138.5, -75.75], [-138.75, -75.65], [-139.0, -75.75], [-139.25, -75.65], [-139.5, -75.75], [-139.75, -75.65], [-140.0, -75.75], [-140.25, -75.65], [-140.5, -75.75], [-140.75, -75.65], [-141.0, -75.75], [-141.25, -75.65], [-141.5, -75.75], [-141.75, -75.65], [-142.0, -75.75], [-142.25, -75.65], [-142.5, -75.75], [-142.75, -75.65], [-143.0, -75.75], [-143.25, -75.65], [-143.5, -75.75], [-143.75, -75.65], [-144.0, -75.75], [-144.25, -75.65], [-144.5, -75.75], [-144.75, -75.65], [-145.0, -75.75], [-145.25, -75.65], [-145.5, -75.75], [-145.75, -75.65], [-146.0, -75.75], [-146.25, -75.65], [-146.5, -75.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 8.489403234353858}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.5593723846272445}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.2056899384550661, -1.6970807386068145, -1.9776848985487732]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.7426419622268554, -0.8073259728715243, -0.9194393858985563]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.466433000483591, 5.0984576596862885, 5.113226493711851]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.489403234353858, 6.378387186634541, 6.652469141839788]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.714055469487721, 1.3778933809564864, 1.3573640027976295]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.229697051740942, 1.9220944596293945, 1.6751726009883203]}}