{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:59:16.025420", "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": "2024-Jun-17_to_2024-Jun-20_347.0_15.0"}, "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": 2024060000512}, "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": "June 17 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 20 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 50640.63168709999}, "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": ["Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 15.0}, "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": 347.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-11.97, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-12.82, 14.32], [-12.97, 13.97], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-15.03, 13.97], [-15.25, 14.5], [-15.04, 15.0], [-15.25, 15.5], [-15.03, 16.03], [-14.5, 16.25], [-14.25, 16.15], [-14.18, 16.18], [-14.03, 16.53], [-13.5, 16.75], [-13.25, 16.65], [-13.12, 16.7], [-13.25, 17.0], [-13.03, 17.53], [-12.5, 17.75], [-11.97, 17.53], [-11.82, 17.18], [-11.47, 17.03], [-11.25, 16.5], [-11.35, 16.25], [-11.25, 16.0], [-11.47, 15.47], [-11.87, 15.3], [-11.75, 15.0], [-11.97, 14.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 14.75], [-15.029999999999973, 14.97], [-15.25, 15.5], [-15.029999999999973, 16.03], [-14.5, 16.25], [-14.25, 16.15], [-14.180000000000007, 16.18], [-14.029999999999973, 16.53], [-13.5, 16.75], [-13.25, 16.65], [-13.120000000000005, 16.7], [-13.25, 17.0], [-13.029999999999973, 17.53], [-12.5, 17.75], [-11.970000000000027, 17.53], [-11.819999999999993, 17.18], [-11.470000000000027, 17.03], [-11.25, 16.5], [-11.350000000000023, 16.25], [-11.25, 16.0], [-11.470000000000027, 15.47], [-12.0, 15.25], [-12.25, 15.35], [-12.319999999999993, 15.32], [-12.470000000000027, 14.97], [-13.0, 14.75], [-13.25, 14.85], [-13.5, 14.75], [-13.75, 14.85], [-14.0, 14.75], [-14.25, 14.85], [-14.5, 14.75]]]]}, "2024-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 15.5], [-15.029999999999973, 16.03], [-14.5, 16.25], [-14.25, 16.15], [-14.180000000000007, 16.18], [-14.029999999999973, 16.53], [-13.5, 16.75], [-13.25, 16.65], [-13.120000000000005, 16.7], [-13.25, 17.0], [-13.029999999999973, 17.53], [-12.5, 17.75], [-11.970000000000027, 17.53], [-11.819999999999993, 17.18], [-11.470000000000027, 17.03], [-11.25, 16.5], [-11.350000000000023, 16.25], [-11.25, 16.0], [-11.470000000000027, 15.47], [-11.870000000000005, 15.3], [-11.75, 15.0], [-11.970000000000027, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-12.819999999999993, 14.32], [-12.970000000000027, 13.97], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-15.029999999999973, 13.97], [-15.25, 14.5], [-15.04000000000002, 15.0], [-15.25, 15.5]]]]}, "2024-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 15.5], [-15.029999999999973, 16.03], [-14.5, 16.25], [-14.25, 16.15], [-14.180000000000007, 16.18], [-14.029999999999973, 16.53], [-13.5, 16.75], [-13.25, 16.65], [-13.120000000000005, 16.7], [-13.25, 17.0], [-13.029999999999973, 17.53], [-12.5, 17.75], [-11.970000000000027, 17.53], [-11.819999999999993, 17.18], [-11.470000000000027, 17.03], [-11.25, 16.5], [-11.350000000000023, 16.25], [-11.25, 16.0], [-11.470000000000027, 15.47], [-11.870000000000005, 15.3], [-11.75, 15.0], [-11.970000000000027, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-12.819999999999993, 14.32], [-12.970000000000027, 13.97], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-15.029999999999973, 13.97], [-15.25, 14.5], [-15.04000000000002, 15.0], [-15.25, 15.5]]]]}, "2024-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.529999999999973, 15.53], [-14.180000000000007, 15.68], [-14.029999999999973, 16.03], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.470000000000027, 16.03], [-12.319999999999993, 15.68], [-11.970000000000027, 15.53], [-11.75, 15.0], [-11.970000000000027, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-12.819999999999993, 14.32], [-12.970000000000027, 13.97], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-15.029999999999973, 13.97], [-15.25, 14.5], [-15.029999999999973, 15.03], [-14.680000000000007, 15.18], [-14.529999999999973, 15.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.001097919336189}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.424433179535089}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [32.473468367567705, 31.51645212746689, 31.091032061418844, 31.41436254349196]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.956264845006842, 29.248083346865826, 28.47216981094374, 30.222807468504357]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.195674896998008, -2.4761844423482056, -2.810149478766749, -1.8522814318250451]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.640844874327513, -3.7800590349482945, -4.001097919336189, -2.2927049147913294]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4133223673277764, -1.7351803588016987, -2.0151114638741374, -1.4041227090117347]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.673415491001271, -2.6192948638581406, -2.862335286474709, -1.6827181967015206]}}