{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:14.807594", "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-01_to_2025-Jul-03_350.0_18.0"}, "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": 2025070000086}, "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 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 03 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": 58726.4260140127}, "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": 18.0}, "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": 350.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 19.03], [-12.68, 19.18], [-12.53, 19.53], [-12.0, 19.75], [-11.75, 19.65], [-11.5, 19.75], [-11.25, 19.65], [-11.0, 19.75], [-10.47, 19.53], [-10.32, 19.18], [-9.97, 19.03], [-9.82, 18.68], [-9.75, 18.65], [-9.5, 18.75], [-9.25, 18.65], [-9.0, 18.75], [-8.75, 18.65], [-8.68, 18.68], [-8.53, 19.03], [-8.0, 19.25], [-7.47, 19.03], [-7.25, 18.5], [-7.47, 17.97], [-7.82, 17.82], [-7.97, 17.47], [-8.5, 17.25], [-8.75, 17.35], [-9.0, 17.25], [-9.25, 17.35], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.5, 17.25], [-10.75, 17.35], [-10.82, 17.32], [-10.85, 17.25], [-10.75, 17.0], [-10.97, 16.47], [-11.5, 16.25], [-12.03, 16.47], [-12.18, 16.82], [-12.53, 16.97], [-12.75, 17.5], [-12.65, 17.75], [-12.68, 17.82], [-13.03, 17.97], [-13.25, 18.5], [-13.03, 19.03]]]]}}, "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": {"2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.029999999999973, 17.97], [-13.25, 18.5], [-13.029999999999973, 19.03], [-12.680000000000007, 19.18], [-12.529999999999973, 19.53], [-12.0, 19.75], [-11.75, 19.65], [-11.5, 19.75], [-11.25, 19.65], [-11.0, 19.75], [-10.470000000000027, 19.53], [-10.319999999999993, 19.18], [-9.970000000000027, 19.03], [-9.819999999999993, 18.68], [-9.75, 18.65], [-9.5, 18.75], [-9.25, 18.65], [-9.0, 18.75], [-8.75, 18.65], [-8.680000000000007, 18.68], [-8.529999999999973, 19.03], [-8.0, 19.25], [-7.470000000000027, 19.03], [-7.25, 18.5], [-7.470000000000027, 17.97], [-7.819999999999993, 17.82], [-7.970000000000027, 17.47], [-8.5, 17.25], [-8.75, 17.35], [-9.0, 17.25], [-9.25, 17.35], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.5, 17.25], [-10.75, 17.35], [-10.819999999999993, 17.32], [-10.850000000000023, 17.25], [-10.75, 17.0], [-10.970000000000027, 16.47], [-11.5, 16.25], [-12.029999999999973, 16.47], [-12.180000000000007, 16.82], [-12.529999999999973, 16.97], [-12.75, 17.5], [-12.649999999999977, 17.75], [-12.680000000000007, 17.82], [-13.029999999999973, 17.97]]]]}, "2025-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.029999999999973, 17.97], [-13.25, 18.5], [-13.029999999999973, 19.03], [-12.680000000000007, 19.18], [-12.529999999999973, 19.53], [-12.0, 19.75], [-11.75, 19.65], [-11.5, 19.75], [-11.25, 19.65], [-11.0, 19.75], [-10.470000000000027, 19.53], [-10.319999999999993, 19.18], [-9.970000000000027, 19.03], [-9.819999999999993, 18.68], [-9.75, 18.65], [-9.5, 18.75], [-9.25, 18.65], [-9.0, 18.75], [-8.75, 18.65], [-8.680000000000007, 18.68], [-8.529999999999973, 19.03], [-8.0, 19.25], [-7.470000000000027, 19.03], [-7.25, 18.5], [-7.470000000000027, 17.97], [-7.819999999999993, 17.82], [-7.970000000000027, 17.47], [-8.5, 17.25], [-8.75, 17.35], [-9.0, 17.25], [-9.25, 17.35], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.5, 17.25], [-10.75, 17.35], [-10.819999999999993, 17.32], [-10.850000000000023, 17.25], [-10.75, 17.0], [-10.970000000000027, 16.47], [-11.5, 16.25], [-12.029999999999973, 16.47], [-12.180000000000007, 16.82], [-12.529999999999973, 16.97], [-12.75, 17.5], [-12.649999999999977, 17.75], [-12.680000000000007, 17.82], [-13.029999999999973, 17.97]]]]}, "2025-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.029999999999973, 17.97], [-13.25, 18.5], [-13.029999999999973, 19.03], [-12.680000000000007, 19.18], [-12.529999999999973, 19.53], [-12.0, 19.75], [-11.75, 19.65], [-11.5, 19.75], [-11.25, 19.65], [-11.0, 19.75], [-10.470000000000027, 19.53], [-10.319999999999993, 19.18], [-9.970000000000027, 19.03], [-9.819999999999993, 18.68], [-9.75, 18.65], [-9.5, 18.75], [-9.25, 18.65], [-9.0, 18.75], [-8.75, 18.65], [-8.680000000000007, 18.68], [-8.529999999999973, 19.03], [-8.0, 19.25], [-7.470000000000027, 19.03], [-7.25, 18.5], [-7.470000000000027, 17.97], [-7.819999999999993, 17.82], [-7.970000000000027, 17.47], [-8.5, 17.25], [-8.75, 17.35], [-9.0, 17.25], [-9.25, 17.35], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.5, 17.25], [-10.75, 17.35], [-10.819999999999993, 17.32], [-10.850000000000023, 17.25], [-10.75, 17.0], [-10.970000000000027, 16.47], [-11.5, 16.25], [-12.029999999999973, 16.47], [-12.180000000000007, 16.82], [-12.529999999999973, 16.97], [-12.75, 17.5], [-12.649999999999977, 17.75], [-12.680000000000007, 17.82], [-13.029999999999973, 17.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.753353011364368}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.583873922831745}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [32.232238515218114, 31.01832377115886, 31.85467376708982]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [30.803413645426474, 29.795826212565146, 31.038621520996116]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.03300475052703, -3.270623618235709, -2.4479933997324963]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6716059481408365, -3.753353011364368, -2.9007204784098235]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3876103007316265, -2.3467305018296845, -1.8303082509024329]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5198815919805095, -2.7763542201963367, -2.5125845570501304]}}