{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:49.980313", "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-Dec-19_to_2023-Dec-22_14.5_11.0"}, "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": 2023120001753}, "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": "December 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 22 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": 54732.81089003109}, "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": ["Cameroon", "Chad", "Nigeria"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 11.0}, "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": 14.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[12.97, 11.03], [13.5, 11.25], [13.75, 11.15], [13.82, 11.18], [13.97, 11.53], [14.5, 11.75], [14.75, 11.65], [14.82, 11.68], [14.85, 11.75], [14.75, 12.0], [14.97, 12.53], [15.5, 12.75], [16.03, 12.53], [16.25, 12.0], [16.15, 11.75], [16.25, 11.5], [16.13, 11.2], [16.53, 11.03], [16.75, 10.5], [16.53, 9.97], [16.18, 9.82], [16.03, 9.47], [15.5, 9.25], [15.25, 9.35], [15.18, 9.32], [15.15, 9.25], [15.25, 9.0], [15.03, 8.47], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.82, 9.32], [13.75, 9.35], [13.68, 9.32], [13.53, 8.97], [13.0, 8.75], [12.47, 8.97], [12.25, 9.5], [12.35, 9.75], [12.25, 10.0], [12.47, 10.53], [12.82, 10.68], [12.97, 11.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa", "Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, 9.97], [12.75, 10.5], [12.97, 11.03], [13.5, 11.25], [13.75, 11.15], [13.82, 11.18], [13.97, 11.53], [14.5, 11.75], [14.8, 11.63], [14.85, 11.75], [14.75, 12.0], [14.97, 12.53], [15.5, 12.75], [16.03, 12.53], [16.25, 12.0], [16.15, 11.75], [16.25, 11.5], [16.13, 11.2], [16.53, 11.03], [16.75, 10.5], [16.53, 9.97], [16.0, 9.75], [15.47, 9.97], [15.25, 10.5], [15.38, 10.8], [15.2, 10.88], [15.04, 10.5], [15.25, 10.0], [15.03, 9.47], [14.5, 9.25], [14.25, 9.35], [14.0, 9.25], [13.47, 9.47], [13.32, 9.82], [12.97, 9.97]]]]}, "2023-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, 10.0], [12.47, 10.53], [12.82, 10.68], [12.97, 11.03], [13.5, 11.25], [13.75, 11.15], [13.82, 11.18], [13.97, 11.53], [14.5, 11.75], [14.75, 11.65], [14.82, 11.68], [14.85, 11.75], [14.75, 12.0], [14.97, 12.53], [15.5, 12.75], [16.03, 12.53], [16.25, 12.0], [16.15, 11.75], [16.25, 11.5], [16.13, 11.2], [16.53, 11.03], [16.75, 10.5], [16.53, 9.97], [16.18, 9.82], [16.03, 9.47], [15.5, 9.25], [15.25, 9.35], [15.18, 9.32], [15.15, 9.25], [15.25, 9.0], [15.03, 8.47], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.82, 9.32], [13.75, 9.35], [13.68, 9.32], [13.53, 8.97], [13.0, 8.75], [12.47, 8.97], [12.25, 9.5], [12.35, 9.75], [12.25, 10.0]]]]}, "2023-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, 10.0], [12.47, 10.53], [12.82, 10.68], [12.97, 11.03], [13.5, 11.25], [13.75, 11.15], [13.82, 11.18], [13.97, 11.53], [14.5, 11.75], [14.75, 11.65], [14.82, 11.68], [14.85, 11.75], [14.75, 12.0], [14.97, 12.53], [15.5, 12.75], [16.03, 12.53], [16.25, 12.0], [16.15, 11.75], [16.25, 11.5], [16.13, 11.2], [16.53, 11.03], [16.75, 10.5], [16.53, 9.97], [16.18, 9.82], [16.03, 9.47], [15.5, 9.25], [15.25, 9.35], [15.18, 9.32], [15.15, 9.25], [15.25, 9.0], [15.03, 8.47], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.82, 9.32], [13.75, 9.35], [13.68, 9.32], [13.53, 8.97], [13.0, 8.75], [12.47, 8.97], [12.25, 9.5], [12.35, 9.75], [12.25, 10.0]]]]}, "2023-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, 10.0], [12.47, 10.53], [13.0, 10.75], [13.25, 10.65], [13.32, 10.68], [13.47, 11.03], [13.82, 11.18], [13.97, 11.53], [14.5, 11.75], [14.75, 11.65], [15.0, 11.75], [15.53, 11.53], [15.75, 11.0], [15.65, 10.75], [15.68, 10.68], [16.03, 10.53], [16.25, 10.0], [16.03, 9.47], [15.5, 9.25], [15.25, 9.35], [15.18, 9.32], [15.15, 9.25], [15.25, 9.0], [15.03, 8.47], [14.5, 8.25], [13.97, 8.47], [13.75, 9.0], [13.85, 9.25], [13.82, 9.32], [13.75, 9.35], [13.68, 9.32], [13.53, 8.97], [13.0, 8.75], [12.47, 8.97], [12.25, 9.5], [12.35, 9.75], [12.25, 10.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.0961494711035016}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.4300568622916345}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.57692324691743, 27.090791898036457, 26.960711405434893, 26.719492211076897]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.050953686837545, 28.54241618889398, 28.633476791415603, 28.26219756353663]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.2653689926466143, 2.5620745848845434, 2.5433939873872067, 2.2087079836321704]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.5139923160209037, 3.0816103750325965, 3.0961494711035016, 2.683617958673551]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3454482683346218, 1.671600532304268, 1.7145634528968754, 1.5538023805691128]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4223937033889968, 1.9978077516691481, 2.156557588658896, 1.9833998605531427]}}