{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:53.130820", "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": "2025-Sep-04_to_2025-Sep-08_359.0_8.5"}, "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": 2025090001239}, "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": "September 04 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 08 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 128351.2975562684}, "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": ["Benin", "Ghana", "Nigeria", "Togo"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 8.0}, "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": 1.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -2.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[0.25, 7.5], [0.15, 7.25], [0.25, 7.0], [0.03, 6.47], [-0.5, 6.25], [-1.03, 6.47], [-1.18, 6.82], [-1.25, 6.85], [-1.32, 6.82], [-1.47, 6.47], [-2.0, 6.25], [-2.25, 6.35], [-2.5, 6.25], [-3.03, 6.47], [-3.25, 7.0], [-3.15, 7.25], [-3.25, 7.5], [-3.03, 8.03], [-2.5, 8.25], [-2.25, 8.15], [-2.18, 8.18], [-2.15, 8.25], [-2.25, 8.5], [-2.03, 9.03], [-1.68, 9.18], [-1.54, 9.5], [-1.75, 10.0], [-1.53, 10.53], [-1.0, 10.75], [-0.75, 10.65], [-0.5, 10.75], [-0.25, 10.65], [0.0, 10.75], [0.25, 10.65], [0.32, 10.68], [0.47, 11.03], [1.0, 11.25], [1.53, 11.03], [1.75, 10.5], [1.63, 10.2], [2.0, 10.04], [2.5, 10.25], [3.03, 10.03], [3.18, 9.68], [3.53, 9.53], [3.75, 9.0], [3.53, 8.47], [3.18, 8.32], [3.15, 8.25], [3.25, 8.0], [3.15, 7.75], [3.25, 7.5], [3.03, 6.97], [2.5, 6.75], [1.97, 6.97], [1.82, 7.32], [1.5, 7.46], [1.0, 7.25], [0.47, 7.47], [0.32, 7.82], [0.25, 7.85], [0.18, 7.82], [0.15, 7.75], [0.25, 7.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.65, 8.25], [-1.75, 8.5], [-1.53, 9.03], [-1.0, 9.25], [-0.47, 9.03], [-0.32, 8.68], [0.03, 8.53], [0.25, 8.0], [0.15, 7.75], [0.25, 7.5], [0.15, 7.25], [0.25, 7.0], [0.03, 6.47], [-0.5, 6.25], [-1.03, 6.47], [-1.18, 6.82], [-1.53, 6.97], [-1.75, 7.5], [-1.65, 7.75], [-1.75, 8.0], [-1.65, 8.25]]], [[[1.0, 8.75], [1.53, 8.53], [1.75, 8.0], [1.53, 7.47], [1.0, 7.25], [0.47, 7.47], [0.25, 8.0], [0.47, 8.53], [1.0, 8.75]]]]}, "2025-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.25, 7.5], [-3.03, 8.03], [-2.5, 8.25], [-2.25, 8.15], [-2.18, 8.18], [-2.15, 8.25], [-2.25, 8.5], [-2.03, 9.03], [-1.68, 9.18], [-1.53, 9.53], [-1.0, 9.75], [-0.75, 9.65], [-0.5, 9.75], [-0.0, 9.54], [0.32, 9.68], [0.47, 10.03], [1.0, 10.25], [1.25, 10.15], [1.5, 10.25], [2.0, 10.04], [2.5, 10.25], [3.03, 10.03], [3.18, 9.68], [3.53, 9.53], [3.75, 9.0], [3.53, 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[-2.03, 9.03], [-1.68, 9.18], [-1.54, 9.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 2.000929189278679}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.4243756521517443}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.11240666707357, 26.10300740260709, 26.702134428162537, 26.591921576900802, 26.908920118543904]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.11240666707357, 26.568301137288415, 27.4892402648926, 27.50697479248049, 27.12659861246749]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.8713869069691214, 1.2171462074195896, 1.6121628135982424, 1.4658616833337665, 1.2248099646806263]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [0.8713869069691214, 1.6596728931866664, 2.000929189278679, 1.8272669329350606, 1.3298725508939242]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2327719525566398, 1.4388982834475794, 1.9077072616390773, 1.7064867192451296, 1.3812091087051046]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.2327719525566398, 1.8182751665704215, 2.3679146422153594, 2.1297213347063253, 1.4783700952684633]}}