{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:22.137086", "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-Feb-19_to_2023-Feb-21_44.5_-23.0"}, "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": 2023020002189}, "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": "February 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 21 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": 57831.5013057199}, "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": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": -23.0}, "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": 44.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "44.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[43.47, -18.97], [44.0, -18.75], [44.25, -18.85], [44.5, -18.75], [45.03, -18.97], [45.18, -19.32], [45.25, -19.35], [45.32, -19.32], [45.47, -18.97], [46.0, -18.75], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.03, -20.03], [46.68, -20.18], [46.65, -20.25], [46.75, -20.5], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.68, -21.68], [45.65, -21.75], [45.75, -22.0], [45.65, -22.25], [45.75, -22.5], [45.53, -23.03], [45.18, -23.18], [45.03, -23.53], [44.5, -23.75], [43.97, -23.53], [43.75, -23.0], [43.97, -22.47], [44.32, -22.32], [44.35, -22.25], [44.32, -22.18], [43.97, -22.03], [43.75, -21.5], [43.85, -21.25], [43.75, -21.0], [43.85, -20.75], [43.75, -20.5], [43.85, -20.25], [43.82, -20.18], [43.47, -20.03], [43.25, -19.5], [43.47, -18.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -20.03], [43.25, -19.5], [43.47, -18.97], [44.0, -18.75], [44.25, -18.85], [44.5, -18.75], [45.03, -18.97], [45.18, -19.32], [45.25, -19.35], [45.32, -19.32], [45.47, -18.97], [46.0, -18.75], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.03, -20.03], [46.68, -20.18], [46.65, -20.25], [46.75, -20.5], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.68, -21.68], [45.65, -21.75], [45.75, -22.0], [45.65, -22.25], [45.75, -22.5], [45.53, -23.03], [45.18, -23.18], [45.03, -23.53], [44.5, -23.75], [43.97, -23.53], [43.75, -23.0], [43.97, -22.47], [44.32, -22.32], [44.35, -22.25], [44.32, -22.18], [43.97, -22.03], [43.75, -21.5], [43.85, -21.25], [43.75, -21.0], [43.85, -20.75], [43.75, -20.5], [43.85, -20.25], [43.82, -20.18], [43.47, -20.03]]]]}, "2023-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -20.03], [43.25, -19.5], [43.47, -18.97], [44.0, -18.75], [44.25, -18.85], [44.5, -18.75], [45.03, -18.97], [45.18, -19.32], [45.25, -19.35], [45.32, -19.32], [45.47, -18.97], [46.0, -18.75], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.03, -20.03], [46.68, -20.18], [46.65, -20.25], [46.75, -20.5], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.68, -21.68], [45.65, -21.75], [45.75, -22.0], [45.65, -22.25], [45.75, -22.5], [45.53, -23.03], [45.18, -23.18], [45.03, -23.53], [44.5, -23.75], [43.97, -23.53], [43.75, -23.0], [43.97, -22.47], [44.32, -22.32], [44.35, -22.25], [44.32, -22.18], [43.97, -22.03], [43.75, -21.5], [43.85, -21.25], [43.75, -21.0], [43.85, -20.75], [43.75, -20.5], [43.85, -20.25], [43.82, -20.18], [43.47, -20.03]]]]}, "2023-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -20.03], [43.25, -19.5], [43.47, -18.97], [44.0, -18.75], [44.25, -18.85], [44.5, -18.75], [45.03, -18.97], [45.18, -19.32], [45.25, -19.35], [45.32, -19.32], [45.47, -18.97], [46.0, -18.75], [46.25, -18.85], [46.5, -18.75], [47.03, -18.97], [47.25, -19.5], [47.03, -20.03], [46.68, -20.18], [46.65, -20.25], [46.75, -20.5], [46.53, -21.03], [46.18, -21.18], [46.03, -21.53], [45.68, -21.68], [45.65, -21.75], [45.75, -22.0], [45.65, -22.25], [45.75, -22.5], [45.53, -23.03], [45.18, -23.18], [45.03, -23.53], [44.5, -23.75], [43.97, -23.53], [43.75, -23.0], [43.97, -22.47], [44.32, -22.32], [44.35, -22.25], [44.32, -22.18], [43.97, -22.03], [43.75, -21.5], [43.85, -21.25], [43.75, -21.0], [43.85, -20.75], [43.75, -20.5], [43.85, -20.25], [43.82, -20.18], [43.47, -20.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.2070193913654066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.7684326669765795}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.613839847060888, 27.70410858940022, 27.417448295079453]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.13656198314351, 29.130176455721482, 28.867771188218114]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.7422527278182884, 1.8992117146969747, 1.6638335584144754]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.2623221955702206, 2.8817064288670053, 3.2070193913654066]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.576997613278673, 1.6825272901596808, 1.4340220048642942]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.0815483968764803, 2.1345238266306534, 2.0321247308911583]}}