{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:49.742594", "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-17_to_2023-Apr-20_22.0_-0.5"}, "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": 2023040002156}, "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 17 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2023"}, "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": "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": 237932.26607362385}, "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": ["Congo", "Congo, The Democratic Republic of the"]}, "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": -0.5}, "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": 22.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.75, 1.15], [16.0, 1.25], [16.25, 1.15], [16.5, 1.25], [16.75, 1.15], [16.82, 1.18], [16.97, 1.53], [17.38, 1.7], [17.25, 2.0], [17.47, 2.53], [18.0, 2.75], [18.53, 2.53], [18.68, 2.18], [19.0, 2.04], [19.5, 2.25], [20.03, 2.03], [20.25, 1.5], [20.15, 1.25], [20.18, 1.18], [20.53, 1.03], [20.7, 0.63], [21.0, 0.75], [21.25, 0.65], [21.5, 0.75], [21.75, 0.65], [22.0, 0.75], [22.25, 0.65], [22.5, 0.75], [23.03, 0.53], [23.18, 0.18], [23.53, 0.03], [23.75, -0.5], [23.53, -1.03], [23.0, -1.25], [22.7, -1.13], [22.53, -1.53], [22.18, -1.68], [22.03, -2.03], [21.68, -2.18], [21.65, -2.25], [21.75, -2.5], [21.53, -3.03], [21.0, -3.25], [20.75, -3.15], [20.5, -3.25], [20.25, -3.15], [20.18, -3.18], [20.03, -3.53], [19.5, -3.75], [19.25, -3.65], [19.0, -3.75], [18.75, -3.65], [18.5, -3.75], [18.25, -3.65], [18.0, -3.75], [17.47, -3.53], [17.32, -3.18], [17.25, -3.15], [17.0, -3.25], [16.47, -3.03], [16.25, -2.5], [16.35, -2.25], [16.25, -2.0], [16.35, -1.75], [16.25, -1.5], [16.47, -0.97], [17.0, -0.75], [16.75, -0.65], [16.5, -0.75], [16.25, -0.65], [16.18, -0.68], [16.03, -1.03], [15.5, -1.25], [14.97, -1.03], [14.75, -0.5], [14.96, -0.0], [14.75, 0.5], [14.97, 1.03], [15.5, 1.25], [15.75, 1.15]], [[17.25, -0.85], [17.32, -0.82], [17.35, -0.75], [17.3, -0.63], [17.0, -0.75], [17.25, -0.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, -1.97], [19.0, -1.75], [19.53, -1.97], [19.75, -2.5], [19.53, -3.03], [19.0, -3.25], [18.47, -3.03], [18.25, -2.5], [18.47, -1.97]]]]}, "2023-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 0.5], [14.97, 1.03], [15.5, 1.25], [15.75, 1.15], [16.0, 1.25], [16.25, 1.15], [16.5, 1.25], [16.75, 1.15], [16.82, 1.18], [16.97, 1.53], [17.38, 1.7], [17.25, 2.0], [17.47, 2.53], [18.0, 2.75], [18.53, 2.53], [18.68, 2.18], [19.0, 2.04], [19.5, 2.25], [20.03, 2.03], [20.25, 1.5], [20.15, 1.25], [20.18, 1.18], [20.53, 1.03], [20.7, 0.63], [21.0, 0.75], [21.25, 0.65], [21.5, 0.75], [21.75, 0.65], [22.0, 0.75], [22.25, 0.65], [22.5, 0.75], [23.03, 0.53], [23.18, 0.18], [23.53, 0.03], [23.75, -0.5], [23.53, -1.03], [23.0, -1.25], [22.7, -1.13], [22.53, -1.53], [22.18, -1.68], [22.03, -2.03], [21.68, -2.18], [21.65, -2.25], [21.75, -2.5], [21.53, -3.03], [21.0, -3.25], [20.75, -3.15], [20.5, -3.25], [20.25, -3.15], [20.18, -3.18], [20.03, -3.53], [19.5, -3.75], [19.25, -3.65], [19.0, -3.75], [18.75, -3.65], [18.5, -3.75], [18.25, -3.65], [18.0, -3.75], [17.47, -3.53], [17.32, -3.18], [17.25, -3.15], [17.0, -3.25], [16.47, -3.03], [16.25, -2.5], [16.35, -2.25], [16.25, -2.0], [16.35, -1.75], [16.25, -1.5], [16.47, -0.97], [17.0, -0.75], [16.75, -0.65], [16.5, -0.75], [16.25, -0.65], [16.18, -0.68], [16.03, -1.03], [15.5, -1.25], [14.97, -1.03], [14.75, -0.5], [14.96, -0.0], [14.75, 0.5]], [[17.25, -0.85], [17.32, -0.82], [17.35, -0.75], [17.3, -0.63], [17.0, -0.75], [17.25, -0.85]]]]}, "2023-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 0.5], [14.97, 1.03], [15.5, 1.25], [15.75, 1.15], [16.0, 1.25], [16.25, 1.15], [16.5, 1.25], [16.75, 1.15], [16.82, 1.18], [16.97, 1.53], [17.38, 1.7], [17.25, 2.0], [17.47, 2.53], [18.0, 2.75], [18.53, 2.53], [18.68, 2.18], [19.0, 2.04], [19.5, 2.25], [20.03, 2.03], [20.25, 1.5], [20.15, 1.25], [20.18, 1.18], [20.53, 1.03], [20.7, 0.63], [21.0, 0.75], [21.25, 0.65], [21.5, 0.75], [21.75, 0.65], [22.0, 0.75], [22.25, 0.65], [22.5, 0.75], [23.03, 0.53], [23.18, 0.18], [23.53, 0.03], [23.75, -0.5], [23.53, -1.03], [23.0, -1.25], [22.7, -1.13], [22.53, -1.53], [22.18, -1.68], [22.03, -2.03], [21.68, -2.18], [21.65, -2.25], [21.75, -2.5], [21.53, -3.03], [21.0, -3.25], [20.75, -3.15], [20.5, -3.25], [20.25, -3.15], [20.18, -3.18], [20.03, -3.53], [19.5, -3.75], [19.25, -3.65], [19.0, -3.75], [18.75, -3.65], [18.5, -3.75], [18.25, -3.65], [18.0, -3.75], [17.47, -3.53], [17.32, -3.18], [17.25, -3.15], [17.0, -3.25], [16.47, -3.03], [16.25, -2.5], [16.35, -2.25], [16.25, -2.0], [16.35, -1.75], [16.25, -1.5], [16.47, -0.97], [17.0, -0.75], [16.75, -0.65], [16.5, -0.75], [16.25, -0.65], [16.18, -0.68], [16.03, -1.03], [15.5, -1.25], [14.97, -1.03], [14.75, -0.5], [14.96, -0.0], [14.75, 0.5]], [[17.25, -0.85], [17.32, -0.82], [17.35, -0.75], [17.3, -0.63], [17.0, -0.75], [17.25, -0.85]]]]}, "2023-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 0.5], [14.97, 1.03], [15.5, 1.25], [15.75, 1.15], [16.0, 1.25], [16.25, 1.15], [16.5, 1.25], [16.75, 1.15], [16.82, 1.18], [16.97, 1.53], [17.38, 1.7], [17.25, 2.0], [17.47, 2.53], [18.0, 2.75], [18.53, 2.53], [18.68, 2.18], [19.0, 2.04], [19.5, 2.25], [20.03, 2.03], [20.25, 1.5], [20.15, 1.25], [20.18, 1.18], [20.53, 1.03], [20.7, 0.63], [21.0, 0.75], [21.25, 0.65], [21.5, 0.75], [21.75, 0.65], [22.0, 0.75], [22.25, 0.65], [22.5, 0.75], [23.03, 0.53], [23.18, 0.18], [23.53, 0.03], [23.75, -0.5], [23.53, -1.03], [23.0, -1.25], [22.7, -1.13], [22.53, -1.53], [22.18, -1.68], [22.03, -2.03], [21.68, -2.18], [21.65, -2.25], [21.75, -2.5], [21.53, -3.03], [21.0, -3.25], [20.75, -3.15], [20.5, -3.25], [20.25, -3.15], [20.18, -3.18], [20.03, -3.53], [19.5, -3.75], [19.25, -3.65], [19.0, -3.75], [18.75, -3.65], [18.5, -3.75], [18.25, -3.65], [18.0, -3.75], [17.47, -3.53], [17.32, -3.18], [17.25, -3.15], [17.0, -3.25], [16.47, -3.03], [16.25, -2.5], [16.35, -2.25], [16.25, -2.0], [16.35, -1.75], [16.25, -1.5], [16.47, -0.97], [17.0, -0.75], [16.75, -0.65], [16.5, -0.75], [16.25, -0.65], [16.18, -0.68], [16.03, -1.03], [15.5, -1.25], [14.97, -1.03], [14.75, -0.5], [14.96, -0.0], [14.75, 0.5]], [[17.25, -0.85], [17.32, -0.82], [17.35, -0.75], [17.3, -0.63], [17.0, -0.75], [17.25, -0.85]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.357223369094129}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.9910947241869412}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.70616891651497, 27.280558190493707, 28.137862589098006, 27.66879777381905]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.70616891651497, 28.282553007472643, 29.214786697634963, 28.845520991684452]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.2389978718339307, 1.6178125858541401, 2.4302461727218914, 1.9349929055737922]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.2389978718339307, 2.153981254854898, 3.0710256109409215, 3.357223369094129]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4181714733020878, 1.6887012521618683, 2.5209112322573906, 1.9859405555392946]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4181714733020878, 2.499285861307086, 3.1690163637055515, 3.551005587947083]}}