{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:55.571489", "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-Apr-21_to_2023-Apr-26_55.5_-7.5"}, "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": 2023040002465}, "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": "April 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 221201.8145284656}, "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": ["Amirante Basin", "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": -7.5}, "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": 55.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "55.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 53.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 60.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[52.82, -6.32], [52.97, -5.97], [53.38, -5.8], [53.25, -5.5], [53.47, -4.97], [53.82, -4.82], [53.85, -4.75], [53.75, -4.5], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [55.0, -3.75], [55.53, -3.97], [55.68, -4.32], [55.75, -4.35], [56.0, -4.25], [56.25, -4.35], [56.5, -4.25], [56.75, -4.35], [57.0, -4.25], [57.25, -4.35], [57.5, -4.25], [57.75, -4.35], [58.0, -4.25], [58.25, -4.35], [58.5, -4.25], [58.75, -4.35], [59.0, -4.25], [59.25, -4.35], [59.5, -4.25], [59.75, -4.35], [60.0, -4.25], [60.53, -4.47], [60.75, -5.0], [60.54, -5.5], [60.75, -6.0], [60.53, -6.53], [60.0, -6.75], [59.75, -6.65], [59.68, -6.68], [59.53, -7.03], [59.0, -7.25], [58.75, -7.15], [58.68, -7.18], [58.53, -7.53], [58.18, -7.68], [58.15, -7.75], [58.25, -8.0], [58.03, -8.53], [57.5, -8.75], [57.25, -8.65], [57.0, -8.75], [56.47, -8.53], [56.3, -8.12], [56.18, -8.18], [56.03, -8.53], [55.5, -8.75], [55.25, -8.65], [55.0, -8.75], [54.75, -8.65], [54.5, -8.75], [54.25, -8.65], [54.0, -8.75], [53.75, -8.65], [53.5, -8.75], [52.97, -8.53], [52.75, -8.0], [52.85, -7.75], [52.82, -7.68], [52.47, -7.53], [52.25, -7.0], [52.47, -6.47], [52.82, -6.32]], [[56.7, -7.38], [56.82, -7.32], [56.85, -7.25], [56.82, -7.18], [56.75, -7.15], [56.68, -7.18], [56.65, -7.25], [56.7, -7.38]]]]}}, "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": {"2023-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, -6.47], [53.82, -6.32], [53.85, -6.25], [53.82, -6.18], [53.47, -6.03], [53.25, -5.5], [53.47, -4.97], [53.82, -4.82], [53.85, -4.75], [53.75, -4.5], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [55.0, -3.75], [55.53, -3.97], [55.68, -4.32], [55.75, -4.35], [56.0, -4.25], [56.25, -4.35], [56.5, -4.25], [56.75, -4.35], [57.0, -4.25], [57.25, -4.35], [57.5, -4.25], [57.75, -4.35], [58.0, -4.25], [58.25, -4.35], [58.5, -4.25], [58.75, -4.35], [59.0, -4.25], [59.25, -4.35], [59.5, -4.25], [59.75, -4.35], [60.0, -4.25], [60.53, -4.47], [60.75, -5.0], [60.54, -5.5], [60.75, -6.0], [60.53, -6.53], [60.0, -6.75], [59.75, -6.65], [59.68, -6.68], [59.53, -7.03], [59.0, -7.25], [58.75, -7.15], [58.68, -7.18], [58.53, -7.53], [58.18, -7.68], [58.15, -7.75], [58.25, -8.0], [58.03, -8.53], [57.5, -8.75], [57.25, -8.65], [57.0, -8.75], [56.47, -8.53], [56.3, -8.12], [56.18, -8.18], [56.03, -8.53], [55.5, -8.75], [55.25, -8.65], [55.0, -8.75], [54.75, -8.65], [54.5, -8.75], [53.97, -8.53], [53.82, -8.18], [53.75, -8.15], [53.5, -8.25], [52.97, -8.03], [52.75, -7.5], [52.97, -6.97], [53.32, -6.82], [53.47, -6.47]], [[56.82, -7.32], [56.85, -7.25], [56.82, -7.18], [56.75, -7.15], [56.68, -7.18], [56.65, -7.25], [56.7, -7.38], [56.82, -7.32]]]]}, "2023-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -7.53], [52.25, -7.0], [52.47, -6.47], [52.82, -6.32], [52.97, -5.97], [53.38, -5.8], [53.25, -5.5], [53.47, -4.97], [53.82, -4.82], [53.85, -4.75], [53.75, -4.5], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [55.0, -3.75], [55.53, -3.97], [55.68, -4.32], [55.75, -4.35], [56.0, -4.25], [56.25, -4.35], [56.5, -4.25], [56.75, -4.35], [57.0, -4.25], [57.25, -4.35], [57.5, -4.25], [57.75, -4.35], [58.0, -4.25], [58.25, -4.35], [58.5, -4.25], [58.75, -4.35], [59.0, -4.25], [59.25, -4.35], [59.5, -4.25], [59.75, -4.35], [60.0, -4.25], [60.53, -4.47], [60.75, -5.0], [60.54, -5.5], [60.75, -6.0], [60.53, -6.53], [60.0, -6.75], [59.75, -6.65], [59.68, -6.68], [59.53, -7.03], [59.0, -7.25], [58.75, -7.15], [58.68, -7.18], [58.53, -7.53], [58.18, -7.68], [58.15, -7.75], [58.25, -8.0], [58.03, -8.53], [57.5, -8.75], [57.25, -8.65], [57.0, -8.75], [56.47, -8.53], [56.3, -8.12], [56.18, -8.18], [56.03, -8.53], [55.5, -8.75], [55.25, -8.65], [55.0, -8.75], [54.75, -8.65], [54.5, -8.75], [53.97, -8.53], [53.82, -8.18], [53.75, -8.15], [53.5, -8.25], [52.97, -8.03], [52.82, -7.68], [52.47, -7.53]], [[56.82, -7.32], [56.85, -7.25], [56.82, -7.18], [56.75, -7.15], [56.68, -7.18], [56.65, -7.25], [56.7, -7.38], [56.82, -7.32]]]]}, "2023-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -7.53], [52.25, -7.0], [52.47, -6.47], [52.82, -6.32], [52.97, -5.97], [53.38, -5.8], [53.25, -5.5], [53.47, -4.97], [53.82, -4.82], [53.85, -4.75], [53.75, -4.5], [53.97, -3.97], [54.5, -3.75], [54.75, -3.85], [55.0, -3.75], [55.53, -3.97], [55.68, -4.32], [55.75, -4.35], [56.0, -4.25], [56.25, -4.35], [56.5, -4.25], [56.75, -4.35], [57.0, -4.25], [57.25, -4.35], [57.5, -4.25], [57.75, -4.35], [58.0, -4.25], [58.25, -4.35], [58.5, -4.25], [58.75, -4.35], [59.0, -4.25], [59.25, -4.35], [59.5, -4.25], [59.75, -4.35], [60.0, -4.25], [60.53, -4.47], [60.75, -5.0], [60.54, -5.5], [60.75, -6.0], [60.53, -6.53], [60.0, -6.75], [59.75, -6.65], [59.68, -6.68], [59.53, -7.03], [59.0, -7.25], [58.75, -7.15], [58.68, -7.18], [58.53, -7.53], [58.18, -7.68], [58.15, -7.75], [58.25, -8.0], [58.03, -8.53], [57.5, -8.75], [57.25, -8.65], [57.0, -8.75], [56.47, -8.53], [56.3, -8.12], [56.18, -8.18], [56.03, -8.53], [55.5, -8.75], [55.25, -8.65], [55.0, -8.75], [54.75, -8.65], [54.5, -8.75], [54.25, -8.65], [54.0, -8.75], [53.75, -8.65], [53.5, -8.75], [52.97, -8.53], [52.75, -8.0], [52.85, -7.75], [52.82, -7.68], [52.47, -7.53]], [[56.82, -7.32], [56.85, -7.25], [56.82, -7.18], [56.75, -7.15], [56.68, -7.18], [56.65, -7.25], [56.7, -7.38], [56.82, -7.32]]]]}, "2023-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -7.53], [52.25, -7.0], [52.47, -6.47], [52.82, -6.32], [52.97, -5.97], [53.5, -5.75], [54.03, -5.97], [54.18, -6.32], [54.25, -6.35], [54.5, -6.25], [54.75, -6.35], [55.0, -6.25], [55.25, -6.35], [55.32, -6.32], [55.35, -6.25], [55.25, -6.0], [55.47, -5.47], [55.82, -5.32], [55.97, -4.97], [56.5, -4.75], [56.75, -4.85], [56.82, -4.82], [56.97, -4.47], [57.5, -4.25], [58.03, -4.47], [58.2, -4.88], [58.5, -4.75], [58.75, -4.85], [59.0, -4.75], [59.53, -4.97], [59.75, -5.5], [59.53, -6.03], [59.18, -6.18], [59.03, -6.53], [58.5, -6.75], [58.25, -6.65], [58.18, -6.68], [58.15, -6.75], [58.25, -7.0], [58.03, -7.53], [57.63, -7.7], [57.75, -8.0], [57.53, -8.53], [57.0, -8.75], [56.47, -8.53], [56.3, -8.12], [56.0, -8.25], [55.75, -8.15], [55.5, -8.25], [55.25, -8.15], [55.18, -8.18], [55.03, -8.53], [54.5, -8.75], [54.25, -8.65], [54.0, -8.75], [53.75, -8.65], [53.5, -8.75], [52.97, -8.53], [52.75, -8.0], [52.85, -7.75], [52.82, -7.68], [52.47, -7.53]], [[56.82, -7.18], [56.75, -7.15], [56.68, -7.18], [56.65, -7.25], [56.7, -7.38], [56.88, -7.3], [56.82, -7.18]]]]}, "2023-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, -7.53], [52.25, -7.0], [52.47, -6.47], [53.0, -6.25], [53.25, -6.35], [53.5, -6.25], [53.75, -6.35], [54.0, -6.25], [54.25, -6.35], [54.5, -6.25], [54.75, -6.35], [55.0, -6.25], [55.25, -6.35], [55.5, -6.25], [56.03, -6.47], [56.25, -7.0], [56.15, -7.25], [56.25, -7.5], [56.03, -8.03], [55.5, -8.25], [55.25, -8.15], [55.18, -8.18], [55.03, -8.53], [54.5, -8.75], [54.25, -8.65], [54.0, -8.75], [53.75, -8.65], [53.5, -8.75], [52.97, -8.53], [52.75, -8.0], [52.85, -7.75], [52.82, -7.68], [52.47, -7.53]]]]}, "2023-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.97, -6.97], [55.5, -6.75], [56.03, -6.97], [56.25, -7.5], [56.03, -8.03], [55.5, -8.25], [54.97, -8.03], [54.75, -7.5], [54.97, -6.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.6282386277684395}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.1019897802550294}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.506815760283644, 28.759974506696608, 28.501877231446315, 28.38761297717855, 28.335110379672642, 28.183747886471565]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.037601096317246, 29.16907089538074, 28.839253502665713, 28.67106359146902, 28.612886546342168, 28.183747886471565]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.065420301691241, 1.3071969014384812, 1.0457745908139684, 0.9562894282903244, 0.9274980134954741, 0.7775370543420763]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.4394492981143685, 1.6282386277684395, 1.2793649583700812, 1.254559885518006, 1.1335231484709425, 0.7775370543420763]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.7977062183878558, 2.2602199049135865, 1.7706759898545061, 1.6710294617087733, 1.6901264027146363, 1.3775320105859876]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.2695630233252855, 2.6858053066486898, 2.2257843566721744, 2.403089011028587, 1.9717521185024467, 1.3775320105859876]}}