{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:25.501393", "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-Jul-21_to_2025-Jul-25_19.0_-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": 2025070000809}, "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": "July 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 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": "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": 54975.520298439806}, "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": ["Angola", "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": -8.5}, "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": 19.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -10.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.97, -7.97], [17.5, -7.75], [17.75, -7.85], [18.0, -7.75], [18.25, -7.85], [18.32, -7.82], [18.35, -7.75], [18.25, -7.5], [18.47, -6.97], [19.0, -6.75], [19.25, -6.85], [19.5, -6.75], [20.03, -6.97], [20.25, -7.5], [20.04, -8.0], [20.18, -8.32], [20.53, -8.47], [20.68, -8.82], [21.03, -8.97], [21.25, -9.5], [21.03, -10.03], [20.5, -10.25], [20.25, -10.15], [20.18, -10.18], [20.03, -10.53], [19.5, -10.75], [18.97, -10.53], [18.75, -10.0], [18.85, -9.75], [18.75, -9.5], [18.53, -10.03], [18.0, -10.25], [17.75, -10.15], [17.5, -10.25], [16.97, -10.03], [16.75, -9.5], [16.85, -9.25], [16.75, -9.0], [16.85, -8.75], [16.75, -8.5], [16.97, -7.97]], [[18.85, -9.25], [18.82, -9.18], [18.75, -9.15], [18.68, -9.18], [18.65, -9.25], [18.75, -9.5], [18.85, -9.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, -9.25], [16.97, -9.03], [16.75, -8.5], [16.97, -7.97], [17.5, -7.75], [18.0, -7.96], [18.5, -7.75], [18.75, -7.85], [19.0, -7.75], [19.25, -7.85], [19.5, -7.75], [20.03, -7.97], [20.18, -8.32], [20.53, -8.47], [20.68, -8.82], [21.03, -8.97], [21.25, -9.5], [21.03, -10.03], [20.5, -10.25], [20.25, -10.15], [20.18, -10.18], [20.03, -10.53], [19.5, -10.75], [18.97, -10.53], [18.75, -10.0], [18.85, -9.75], [18.75, -9.5], [18.85, -9.25], [18.82, -9.18], [18.75, -9.15], [18.5, -9.25], [18.0, -9.04], [17.5, -9.25]]]]}, "2025-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, -9.0], [16.85, -8.75], [16.75, -8.5], [16.97, -7.97], [17.5, -7.75], [18.0, -7.96], [18.32, -7.82], [18.35, -7.75], [18.25, -7.5], [18.47, -6.97], [19.0, -6.75], [19.25, -6.85], [19.5, -6.75], [20.03, -6.97], [20.25, -7.5], [20.04, -8.0], [20.18, -8.32], [20.53, -8.47], [20.68, -8.82], [21.03, -8.97], [21.25, -9.5], [21.03, -10.03], [20.5, -10.25], [20.25, -10.15], [20.18, -10.18], [20.03, -10.53], [19.5, -10.75], [18.97, -10.53], [18.75, -10.0], [18.85, -9.75], [18.75, -9.5], [18.53, -10.03], [18.0, -10.25], [17.75, -10.15], [17.5, -10.25], [16.97, -10.03], [16.75, -9.5], [16.85, -9.25], [16.75, -9.0]], [[18.85, -9.25], [18.82, -9.18], [18.75, -9.15], [18.68, -9.18], [18.65, -9.25], [18.75, -9.5], [18.85, -9.25]]]]}, "2025-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, -9.0], [16.85, -8.75], [16.75, -8.5], [16.97, -7.97], [17.5, -7.75], [17.75, -7.85], [18.0, -7.75], [18.25, -7.85], [18.32, -7.82], [18.35, -7.75], [18.25, -7.5], [18.47, -6.97], [19.0, -6.75], [19.25, -6.85], [19.5, -6.75], [20.03, -6.97], [20.25, -7.5], [20.04, -8.0], [20.18, -8.32], [20.53, -8.47], [20.68, -8.82], [21.03, -8.97], [21.25, -9.5], [21.03, -10.03], [20.5, -10.25], [20.25, -10.15], [20.18, -10.18], [20.03, -10.53], [19.5, -10.75], [18.97, -10.53], [18.75, -10.0], [18.85, -9.75], [18.75, -9.5], [18.53, -10.03], [18.0, -10.25], [17.75, -10.15], [17.5, 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-7.75], [18.25, -7.85], [18.32, -7.82], [18.47, -7.47], [19.0, -7.25], [19.53, -7.47], [19.75, -8.0], [19.65, -8.25], [19.75, -8.5], [19.53, -9.03], [19.0, -9.25], [18.75, -9.15], [18.68, -9.18], [18.65, -9.25], [18.75, -9.5], [18.53, -10.03], [18.0, -10.25], [17.75, -10.15], [17.5, -10.25], [16.97, -10.03], [16.75, -9.5], [16.85, -9.25], [16.75, -9.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.178216867371475}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4720177466024262}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.07400588989259, 22.403082933612893, 22.513869222005212, 22.910056975393616, 23.13169533058442]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.673118845621786, 20.816456095377646, 20.846470133463583, 22.10759633382162, 21.779707845052087]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3642507887464206, -1.4568448040118203, -1.4638979535192063, -1.563455574505538, -1.5249010545095478]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5963009680822893, -1.73168928157844, -1.944308706698223, -2.178216867371475, -1.7324455293103824]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.432205150577881, -1.600306480115565, -1.6763583857080853, -1.904239142022354, -1.9002181170426675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.588467800811936, -1.957400308937921, -2.3800625416069523, -2.517199303909748, -2.3189497362922427]}}