{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:26.136183", "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-23_to_2025-Jul-25_350.5_24.0"}, "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": 2025070000900}, "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 23 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": 3}, "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": 162606.3326774505}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 24.0}, "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": 350.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 25.03], [-12.68, 25.18], [-12.53, 25.53], [-12.0, 25.75], [-11.75, 25.65], [-11.68, 25.68], [-11.53, 26.03], [-11.18, 26.18], [-11.15, 26.25], [-11.25, 26.5], [-11.03, 27.03], [-10.68, 27.18], [-10.53, 27.53], [-10.0, 27.75], [-9.47, 27.53], [-9.32, 27.18], [-9.25, 27.15], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-8.25, 27.15], [-8.0, 27.25], [-7.47, 27.03], [-7.32, 26.68], [-6.97, 26.53], [-6.75, 26.0], [-6.85, 25.75], [-6.75, 25.5], [-6.97, 24.97], [-7.32, 24.82], [-7.47, 24.47], [-7.82, 24.32], [-7.85, 24.25], [-7.75, 24.0], [-7.97, 23.47], [-8.32, 23.32], [-8.35, 23.25], [-8.25, 23.0], [-8.47, 22.47], [-9.0, 22.25], [-9.25, 22.35], [-9.5, 22.25], [-10.03, 22.47], [-10.25, 23.0], [-10.47, 22.47], [-11.0, 22.25], [-11.53, 22.47], [-11.68, 22.82], [-12.0, 22.96], [-12.5, 22.75], [-12.75, 22.85], [-13.0, 22.75], [-13.53, 22.97], [-13.75, 23.5], [-13.53, 24.03], [-13.18, 24.18], [-13.15, 24.25], [-13.25, 24.5], [-13.03, 25.03]], [[-10.15, 23.25], [-10.18, 23.32], [-10.25, 23.35], [-10.32, 23.32], [-10.35, 23.25], [-10.25, 23.0], [-10.15, 23.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.149999999999977, 24.25], [-13.25, 24.5], [-13.029999999999973, 25.03], [-12.680000000000007, 25.18], [-12.529999999999973, 25.53], [-12.0, 25.75], [-11.75, 25.65], [-11.680000000000007, 25.68], [-11.529999999999973, 26.03], [-11.180000000000007, 26.18], [-11.149999999999977, 26.25], [-11.25, 26.5], [-11.029999999999973, 27.03], [-10.680000000000007, 27.18], [-10.529999999999973, 27.53], [-10.0, 27.75], [-9.470000000000027, 27.53], [-9.319999999999993, 27.18], [-9.25, 27.15], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-8.25, 27.15], [-8.0, 27.25], [-7.470000000000027, 27.03], [-7.319999999999993, 26.68], [-6.970000000000027, 26.53], [-6.75, 26.0], [-6.850000000000023, 25.75], [-6.75, 25.5], [-6.970000000000027, 24.97], [-7.319999999999993, 24.82], [-7.470000000000027, 24.47], [-7.819999999999993, 24.32], [-7.850000000000023, 24.25], [-7.75, 24.0], [-7.970000000000027, 23.47], [-8.319999999999993, 23.32], [-8.350000000000023, 23.25], [-8.25, 23.0], [-8.470000000000027, 22.47], [-9.0, 22.25], [-9.25, 22.35], [-9.5, 22.25], [-10.029999999999973, 22.47], [-10.25, 23.0], [-10.470000000000027, 22.47], [-11.0, 22.25], [-11.529999999999973, 22.47], [-11.680000000000007, 22.82], [-12.0, 22.96], [-12.5, 22.75], [-12.75, 22.85], [-13.0, 22.75], [-13.529999999999973, 22.97], [-13.75, 23.5], [-13.529999999999973, 24.03], [-13.180000000000007, 24.18], [-13.149999999999977, 24.25]], [[-10.149999999999977, 23.25], [-10.180000000000007, 23.32], [-10.25, 23.35], [-10.319999999999993, 23.32], [-10.350000000000023, 23.25], [-10.25, 23.0], [-10.149999999999977, 23.25]]]]}, "2025-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.149999999999977, 24.25], [-13.25, 24.5], [-13.029999999999973, 25.03], [-12.680000000000007, 25.18], [-12.529999999999973, 25.53], [-12.0, 25.75], [-11.75, 25.65], [-11.680000000000007, 25.68], [-11.529999999999973, 26.03], [-11.180000000000007, 26.18], [-11.149999999999977, 26.25], [-11.25, 26.5], [-11.029999999999973, 27.03], [-10.680000000000007, 27.18], [-10.529999999999973, 27.53], [-10.0, 27.75], [-9.470000000000027, 27.53], [-9.319999999999993, 27.18], [-9.25, 27.15], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-8.25, 27.15], [-8.0, 27.25], [-7.470000000000027, 27.03], [-7.319999999999993, 26.68], [-6.970000000000027, 26.53], [-6.75, 26.0], [-6.850000000000023, 25.75], [-6.75, 25.5], [-6.970000000000027, 24.97], [-7.319999999999993, 24.82], [-7.470000000000027, 24.47], [-7.819999999999993, 24.32], [-7.850000000000023, 24.25], [-7.75, 24.0], [-7.970000000000027, 23.47], [-8.319999999999993, 23.32], [-8.350000000000023, 23.25], [-8.25, 23.0], [-8.470000000000027, 22.47], [-9.0, 22.25], [-9.25, 22.35], [-9.5, 22.25], 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24.18], [-13.149999999999977, 24.25]], [[-10.149999999999977, 23.25], [-10.180000000000007, 23.32], [-10.25, 23.35], [-10.319999999999993, 23.32], [-10.350000000000023, 23.25], [-10.25, 23.0], [-10.149999999999977, 23.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.663565910713714}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.316309068371399}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.342218719131665, 28.20458189865633, 28.64381973441988]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.660679117838583, 23.30046742757162, 25.42261149088546]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.005065165780434, -7.168330551981302, -6.775531487352461]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.3246015416506225, -8.663565910713714, -8.057793336506222]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6340296037686477, -2.5129532616891774, -2.484531484754505]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9742666880070259, -3.4765122753471, -3.265880316940866]}}