{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:51.975851", "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-Nov-21_to_2021-Nov-27_55.0_-6.0"}, "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": 2021110002273}, "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": "November 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 27 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": "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": 335469.6925680471}, "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": ["Seychelles"]}, "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": ["Indian Ocean", "Seychelles"]}, "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": -6.0}, "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": 55.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "55.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 49.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 60.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -2.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[49.75, -5.0], [49.97, -4.47], [50.5, -4.25], [51.03, -4.47], [51.18, -4.82], [51.25, -4.85], [51.5, -4.75], [51.75, -4.85], [51.82, -4.82], [51.97, -4.47], [52.5, -4.25], [53.0, -4.46], [53.5, -4.25], [53.75, -4.35], [53.82, -4.32], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [54.82, -3.82], [54.85, -3.75], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.18, -2.32], [57.25, -2.35], [57.5, -2.25], [57.75, -2.35], [58.0, -2.25], [58.25, -2.35], [58.5, -2.25], [58.75, -2.35], [59.0, -2.25], [59.25, -2.35], [59.5, -2.25], [60.03, -2.47], [60.25, -3.0], [60.15, -3.25], [60.18, -3.32], [60.53, -3.47], [60.68, -3.82], [61.03, -3.97], [61.25, -4.5], [61.03, -5.03], [60.5, -5.25], [60.25, -5.15], [60.18, -5.18], [60.03, -5.53], [59.5, -5.75], [59.25, -5.65], [59.0, -5.75], [58.75, -5.65], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.68, -6.68], [55.53, -7.03], [55.0, -7.25], [54.47, -7.03], [54.32, -6.68], [54.0, -6.54], [53.5, -6.75], [53.25, -6.65], [53.18, -6.68], [53.03, -7.03], [52.5, -7.25], [52.25, -7.15], [52.18, -7.18], [52.03, -7.53], [51.5, -7.75], [51.25, -7.65], [51.18, -7.68], [51.15, -7.75], [51.25, -8.0], [51.03, -8.53], [50.5, -8.75], [50.25, -8.65], [50.18, -8.68], [50.03, -9.03], [49.5, -9.25], [49.25, -9.15], [49.0, -9.25], [48.47, -9.03], [48.25, -8.5], [48.47, -7.97], [48.88, -7.8], [48.82, -7.68], [48.47, -7.53], [48.25, -7.0], [48.35, -6.75], [48.25, -6.5], [48.47, -5.97], [48.82, -5.82], [48.97, -5.47], [49.5, -5.25], [49.75, -5.35], [49.82, -5.32], [49.85, -5.25], [49.75, -5.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, -4.97], [54.0, -4.75], [54.25, -4.85], [54.5, -4.75], [54.75, -4.85], [55.0, -4.75], [55.25, -4.85], [55.5, -4.75], [56.03, -4.97], [56.18, -5.32], [56.25, -5.35], [56.32, -5.32], [56.47, -4.97], [56.82, -4.82], [56.85, -4.75], [56.75, -4.5], [56.97, -3.97], [57.5, -3.75], [57.75, -3.85], [58.0, -3.75], [58.25, -3.85], [58.5, -3.75], [59.03, -3.97], [59.25, -4.5], [59.15, -4.75], [59.25, -5.0], [59.03, -5.53], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.5, -6.75], [55.25, -6.65], [55.0, -6.75], [54.75, -6.65], [54.5, -6.75], [54.0, -6.54], [53.5, -6.75], [52.97, -6.53], [52.75, -6.0], [52.97, -5.47], [53.32, -5.32], [53.47, -4.97]]]]}, "2021-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.25, -6.0], [49.47, -5.47], [49.82, -5.32], [49.97, -4.97], [50.5, -4.75], [50.75, -4.85], [51.0, -4.75], [51.25, -4.85], [51.5, -4.75], [52.03, -4.97], [52.25, -5.5], [52.15, -5.75], [52.25, -6.0], [52.15, -6.25], [52.25, -6.5], [52.03, -7.03], [51.68, -7.18], [51.53, -7.53], [51.0, -7.75], [50.75, -7.65], [50.68, -7.68], [50.53, -8.03], [50.0, -8.25], [49.75, -8.15], [49.5, -8.25], [48.97, -8.03], [48.75, -7.5], [48.97, -6.97], [49.32, -6.82], [49.46, -6.5], [49.25, -6.0]]], [[[52.82, -4.82], [52.97, -4.47], [53.5, -4.25], [54.03, -4.47], [54.18, -4.82], [54.25, -4.85], [54.5, -4.75], [54.75, -4.85], [55.0, -4.75], [55.25, -4.85], [55.32, -4.82], [55.47, -4.47], [56.0, -4.25], [56.25, -4.35], [56.5, -4.25], [56.8, -4.38], [56.97, -3.97], [57.5, -3.75], [57.75, -3.85], [58.0, -3.75], [58.25, -3.85], [58.5, -3.75], [58.75, -3.85], [59.0, -3.75], [59.53, -3.97], [59.75, -4.5], [59.53, -5.03], [59.18, -5.18], [59.03, -5.53], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.5, -6.75], [55.25, -6.65], [55.0, -6.75], [54.75, -6.65], [54.5, -6.75], [54.0, -6.54], [53.5, -6.75], [52.97, -6.53], [52.82, -6.18], [52.47, -6.03], [52.25, -5.5], [52.47, -4.97], [52.82, -4.82]]]]}, "2021-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.97, -5.47], [49.5, -5.25], [49.75, -5.35], [49.82, -5.32], [49.85, -5.25], [49.75, -5.0], [49.97, -4.47], [50.5, -4.25], [51.03, -4.47], [51.18, -4.82], [51.25, -4.85], [51.5, -4.75], [51.75, -4.85], [51.82, -4.82], [51.97, -4.47], [52.5, -4.25], [53.0, -4.46], [53.5, -4.25], [53.75, -4.35], [53.82, -4.32], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [54.82, -3.82], [54.85, -3.75], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.18, -2.32], [57.25, -2.35], [57.5, -2.25], [57.75, -2.35], [58.0, -2.25], [58.25, -2.35], [58.5, -2.25], [58.75, -2.35], [59.0, -2.25], [59.25, -2.35], [59.5, -2.25], [60.03, -2.47], [60.25, -3.0], [60.15, -3.25], [60.18, -3.32], [60.53, -3.47], [60.68, -3.82], [61.03, -3.97], [61.25, -4.5], [61.03, -5.03], [60.5, -5.25], [60.25, -5.15], [60.18, -5.18], [60.03, -5.53], [59.5, -5.75], [59.25, -5.65], [59.0, -5.75], [58.75, -5.65], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.68, -6.68], [55.53, -7.03], [55.0, -7.25], [54.47, -7.03], [54.32, -6.68], [54.0, -6.54], [53.5, -6.75], [53.25, -6.65], [53.0, -6.75], [52.75, -6.65], [52.68, -6.68], [52.53, -7.03], [52.0, -7.25], [51.75, -7.15], [51.68, -7.18], [51.53, -7.53], [51.18, -7.68], [51.15, -7.75], [51.25, -8.0], [51.03, -8.53], [50.5, -8.75], [50.25, -8.65], [50.18, -8.68], [50.03, -9.03], [49.5, -9.25], [49.25, -9.15], [49.0, -9.25], [48.47, -9.03], [48.25, -8.5], [48.47, -7.97], [48.88, -7.8], [48.75, -7.5], [48.88, -7.2], [48.47, -7.03], [48.25, -6.5], [48.47, -5.97], [48.82, -5.82], [48.97, -5.47]]]]}, "2021-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -6.5], [48.47, -5.97], [48.82, -5.82], [48.97, -5.47], [49.5, -5.25], [49.75, -5.35], [49.82, -5.32], [49.85, -5.25], [49.75, -5.0], [49.97, -4.47], [50.5, -4.25], [51.03, -4.47], [51.18, -4.82], [51.25, -4.85], [51.5, -4.75], [51.75, -4.85], [51.82, -4.82], [51.97, -4.47], [52.5, -4.25], [53.0, -4.46], [53.5, -4.25], [53.75, -4.35], [53.82, -4.32], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [54.82, -3.82], [54.85, -3.75], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.18, -2.32], [57.25, -2.35], [57.5, -2.25], [57.75, -2.35], [58.0, -2.25], [58.25, -2.35], [58.5, -2.25], [58.75, -2.35], [59.0, -2.25], [59.25, -2.35], [59.5, -2.25], [60.03, -2.47], [60.25, -3.0], [60.15, -3.25], [60.18, -3.32], [60.53, -3.47], [60.68, -3.82], [61.03, -3.97], [61.25, -4.5], [61.03, -5.03], [60.5, -5.25], [60.25, -5.15], [60.18, -5.18], [60.03, -5.53], [59.5, -5.75], [59.25, -5.65], [59.0, -5.75], [58.75, -5.65], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.68, -6.68], [55.53, -7.03], [55.0, -7.25], [54.47, -7.03], [54.32, -6.68], [54.0, -6.54], [53.5, -6.75], [53.25, -6.65], [53.18, -6.68], [53.03, -7.03], [52.5, -7.25], [52.25, -7.15], [52.18, -7.18], [52.03, -7.53], [51.5, -7.75], [51.25, -7.65], [51.18, -7.68], [51.15, -7.75], [51.25, -8.0], [51.03, -8.53], [50.5, -8.75], [50.25, -8.65], [50.18, -8.68], [50.03, -9.03], [49.5, -9.25], [49.25, -9.15], [49.0, -9.25], [48.47, -9.03], [48.25, -8.5], [48.47, -7.97], [48.88, -7.8], [48.82, -7.68], [48.47, -7.53], [48.25, -7.0], [48.35, -6.75], [48.25, -6.5]]]]}, "2021-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -6.5], [48.47, -5.97], [48.82, -5.82], [48.97, -5.47], [49.5, -5.25], [49.75, -5.35], [49.82, -5.32], [49.85, -5.25], [49.75, -5.0], [49.97, -4.47], [50.5, -4.25], [51.03, -4.47], [51.18, -4.82], [51.25, -4.85], [51.5, -4.75], [51.75, -4.85], [51.82, -4.82], [51.97, -4.47], [52.5, -4.25], [53.0, -4.46], [53.5, -4.25], [53.75, -4.35], [53.82, -4.32], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [54.82, -3.82], [54.85, -3.75], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.18, -2.32], [57.25, -2.35], [57.5, -2.25], [57.75, -2.35], [58.0, -2.25], [58.25, -2.35], [58.5, -2.25], [58.75, -2.35], [59.0, -2.25], [59.25, -2.35], [59.5, -2.25], [60.03, -2.47], [60.25, -3.0], [60.15, -3.25], [60.18, -3.32], [60.53, -3.47], [60.68, -3.82], [61.03, -3.97], [61.25, -4.5], [61.03, -5.03], [60.5, -5.25], [60.25, -5.15], [60.18, -5.18], [60.03, -5.53], [59.5, -5.75], [59.25, -5.65], [59.0, -5.75], [58.75, -5.65], [58.68, -5.68], [58.53, -6.03], [58.0, -6.25], [57.75, -6.15], [57.5, -6.25], [57.25, -6.15], [57.18, -6.18], [57.03, -6.53], [56.5, -6.75], [56.25, -6.65], [56.0, -6.75], [55.75, -6.65], [55.68, -6.68], [55.53, -7.03], [55.0, -7.25], [54.47, -7.03], [54.32, -6.68], [54.0, -6.54], [53.5, -6.75], [53.25, -6.65], [53.18, -6.68], [53.03, -7.03], [52.5, -7.25], [52.25, -7.15], [52.18, -7.18], [52.03, -7.53], [51.5, -7.75], [51.25, -7.65], [51.18, -7.68], [51.15, -7.75], [51.25, -8.0], [51.03, -8.53], [50.5, -8.75], [50.25, -8.65], [50.18, -8.68], [50.03, -9.03], [49.5, -9.25], [49.25, -9.15], [49.0, -9.25], [48.47, -9.03], [48.25, -8.5], [48.47, -7.97], [49.0, -7.75], [48.47, -7.53], [48.25, -7.0], [48.35, -6.75], [48.25, -6.5]], [[49.25, -7.85], [49.32, -7.82], [49.38, -7.7], [49.25, -7.65], [49.0, -7.75], [49.25, -7.85]]]]}, "2021-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -6.5], [48.47, -5.97], [48.82, -5.82], [48.97, -5.47], [49.5, -5.25], [49.75, -5.35], [49.82, -5.32], [49.85, -5.25], [49.75, -5.0], [49.97, -4.47], [50.5, -4.25], [51.03, -4.47], [51.18, -4.82], [51.25, -4.85], [51.5, -4.75], [51.75, -4.85], [51.82, -4.82], [51.97, -4.47], [52.5, -4.25], [53.0, -4.46], [53.5, -4.25], [53.75, -4.35], [53.82, -4.32], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [54.82, -3.82], [54.85, -3.75], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.18, -2.32], [57.25, -2.35], [57.5, -2.25], [57.75, -2.35], [58.0, -2.25], [58.25, -2.35], [58.5, -2.25], [58.75, -2.35], [59.0, -2.25], [59.25, -2.35], [59.5, -2.25], [60.03, -2.47], [60.25, -3.0], [60.15, -3.25], [60.25, -3.5], [60.03, -4.03], [59.5, -4.25], [59.25, -4.15], [59.18, -4.18], [59.03, -4.53], [58.5, -4.75], [58.25, -4.65], [58.0, -4.75], [57.75, -4.65], [57.5, -4.75], [57.25, -4.65], [57.18, -4.68], [57.03, -5.03], [56.68, -5.18], [56.53, -5.53], [56.18, -5.68], [56.03, -6.03], [55.68, -6.18], [55.53, -6.53], [55.0, -6.75], [54.75, -6.65], [54.5, -6.75], [54.0, -6.54], [53.5, -6.75], [53.25, -6.65], [53.18, -6.68], [53.03, -7.03], [52.5, -7.25], [52.25, -7.15], [52.18, -7.18], [52.03, -7.53], [51.5, -7.75], [51.25, -7.65], [51.0, -7.75], [50.75, -7.65], [50.5, -7.75], [50.25, -7.65], [50.0, -7.75], [49.75, -7.65], [49.5, -7.75], [49.25, -7.65], [49.0, -7.75], [48.47, -7.53], [48.25, -7.0], [48.35, -6.75], [48.25, -6.5]]]]}, "2021-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.75, -3.0], [54.97, -2.47], [55.5, -2.25], [55.75, -2.35], [55.82, -2.32], [55.97, -1.97], [56.5, -1.75], [57.03, -1.97], [57.25, -2.5], [57.15, -2.75], [57.25, -3.0], [57.03, -3.53], [56.68, -3.68], [56.53, -4.03], [56.0, -4.25], [55.75, -4.15], [55.5, -4.25], [54.97, -4.03], [54.75, -3.5], [54.85, -3.25], [54.75, -3.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.4771670579800116}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.0337631512045247}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.404991004812985, 27.404837174312377, 27.63315337604581, 27.737170550072165, 27.62049580620277, 27.71162714171902, 27.681863698731263]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.610244821170397, 27.607269684173673, 28.0610427530778, 28.07003284095947, 27.919141653708436, 28.045843683637543, 27.796643621709507]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.9215496634583838, 0.8793331626455559, 1.049359265364901, 1.1389163757393432, 0.9939509341952549, 1.0384319954091787, 0.9385241895647596]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.1304561589916489, 1.1111158548472417, 1.4554511341549983, 1.4771670579800116, 1.3883286263979926, 1.3179281041652757, 1.0860039614311745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5608791306730978, 1.5208622112949104, 1.7585202212390505, 1.9329740350782494, 1.6905092479154573, 1.7571902423994024, 1.4844463184044756]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9184896268886489, 1.9300714815393376, 2.4199826423283297, 2.3846673129465343, 2.466599354214228, 2.2428651595629927, 1.7225947737184668]}}