{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:25.133910", "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": "2022-Feb-12_to_2022-Feb-15_354.0_15.5"}, "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": 2022020000587}, "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": "February 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 15 2022"}, "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": "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": 80192.90357889648}, "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": ["Mali", "Mauritania"]}, "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": 15.5}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-7.75, 17.15], [-7.5, 17.25], [-7.2, 17.12], [-7.03, 17.53], [-6.5, 17.75], [-5.97, 17.53], [-5.82, 17.18], [-5.75, 17.15], [-5.5, 17.25], [-5.25, 17.15], [-5.18, 17.18], [-5.03, 17.53], [-4.5, 17.75], [-3.97, 17.53], [-3.82, 17.18], [-3.75, 17.15], [-3.5, 17.25], [-2.97, 17.03], [-2.75, 16.5], [-2.97, 15.97], [-3.32, 15.82], [-3.47, 15.47], [-4.0, 15.25], [-4.25, 15.35], [-4.32, 15.32], [-4.35, 15.25], [-4.25, 15.0], [-4.47, 14.47], [-5.0, 14.25], [-5.5, 14.46], [-6.0, 14.25], [-6.53, 14.47], [-6.68, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.53, 14.97], [-7.68, 15.32], [-7.75, 15.35], [-8.0, 15.25], [-8.53, 15.47], [-8.75, 16.0], [-8.65, 16.25], [-8.75, 16.5], [-8.53, 17.03], [-8.0, 17.25], [-7.75, 17.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 16.5], [-8.529999999999973, 17.03], [-8.0, 17.25], [-7.75, 17.15], [-7.5, 17.25], [-6.970000000000027, 17.03], [-6.819999999999993, 16.68], [-6.75, 16.65], [-6.5, 16.75], [-6.25, 16.65], [-6.0, 16.75], [-5.75, 16.65], [-5.5, 16.75], [-4.970000000000027, 16.53], [-4.75, 16.0], [-4.970000000000027, 15.47], [-5.319999999999993, 15.32], [-5.470000000000027, 14.97], [-6.0, 14.75], [-6.25, 14.85], [-6.5, 14.75], [-6.75, 14.85], [-7.0, 14.75], [-7.529999999999973, 14.97], [-7.680000000000007, 15.32], [-7.75, 15.35], [-8.0, 15.25], [-8.529999999999973, 15.47], [-8.75, 16.0], [-8.649999999999977, 16.25], [-8.75, 16.5]]]]}, "2022-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 16.5], [-8.529999999999973, 17.03], [-8.0, 17.25], [-7.75, 17.15], [-7.5, 17.25], [-7.199999999999989, 17.12], [-7.029999999999973, 17.53], [-6.5, 17.75], [-5.970000000000027, 17.53], [-5.819999999999993, 17.18], [-5.75, 17.15], [-5.5, 17.25], [-5.25, 17.15], [-5.180000000000007, 17.18], [-5.029999999999973, 17.53], [-4.5, 17.75], [-3.9700000000000273, 17.53], [-3.819999999999993, 17.18], [-3.75, 17.15], [-3.5, 17.25], [-2.9700000000000273, 17.03], [-2.75, 16.5], [-2.9700000000000273, 15.97], [-3.319999999999993, 15.82], [-3.4700000000000273, 15.47], [-4.0, 15.25], [-4.25, 15.35], [-4.319999999999993, 15.32], [-4.350000000000023, 15.25], [-4.25, 15.0], [-4.470000000000027, 14.47], [-5.0, 14.25], [-5.5, 14.46], [-6.0, 14.25], [-6.529999999999973, 14.47], [-6.680000000000007, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.529999999999973, 14.97], [-7.680000000000007, 15.32], [-7.75, 15.35], [-8.0, 15.25], [-8.529999999999973, 15.47], [-8.75, 16.0], [-8.649999999999977, 16.25], [-8.75, 16.5]]]]}, "2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 16.5], [-8.529999999999973, 17.03], [-8.0, 17.25], [-7.75, 17.15], [-7.5, 17.25], [-7.199999999999989, 17.12], [-7.029999999999973, 17.53], [-6.5, 17.75], [-5.970000000000027, 17.53], [-5.819999999999993, 17.18], [-5.75, 17.15], [-5.5, 17.25], [-5.25, 17.15], [-5.180000000000007, 17.18], [-5.029999999999973, 17.53], [-4.5, 17.75], [-3.9700000000000273, 17.53], [-3.819999999999993, 17.18], [-3.75, 17.15], [-3.5, 17.25], [-2.9700000000000273, 17.03], [-2.75, 16.5], [-2.9700000000000273, 15.97], [-3.319999999999993, 15.82], [-3.4700000000000273, 15.47], [-4.0, 15.25], [-4.25, 15.35], [-4.319999999999993, 15.32], [-4.350000000000023, 15.25], [-4.25, 15.0], [-4.470000000000027, 14.47], [-5.0, 14.25], [-5.5, 14.46], [-6.0, 14.25], [-6.529999999999973, 14.47], [-6.680000000000007, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.529999999999973, 14.97], [-7.680000000000007, 15.32], [-7.75, 15.35], [-8.0, 15.25], [-8.529999999999973, 15.47], [-8.75, 16.0], [-8.649999999999977, 16.25], [-8.75, 16.5]]]]}, "2022-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 16.5], [-8.529999999999973, 17.03], [-8.0, 17.25], [-7.75, 17.15], [-7.5, 17.25], [-7.199999999999989, 17.12], [-7.029999999999973, 17.53], [-6.5, 17.75], [-5.970000000000027, 17.53], [-5.819999999999993, 17.18], [-5.75, 17.15], [-5.5, 17.25], [-5.25, 17.15], [-5.180000000000007, 17.18], [-5.029999999999973, 17.53], [-4.5, 17.75], [-3.9700000000000273, 17.53], [-3.819999999999993, 17.18], [-3.75, 17.15], [-3.5, 17.25], [-2.9700000000000273, 17.03], [-2.75, 16.5], [-2.9700000000000273, 15.97], [-3.319999999999993, 15.82], [-3.4700000000000273, 15.47], [-4.0, 15.25], [-4.25, 15.35], [-4.319999999999993, 15.32], [-4.350000000000023, 15.25], [-4.25, 15.0], [-4.470000000000027, 14.47], [-5.0, 14.25], [-5.5, 14.46], [-6.0, 14.25], [-6.529999999999973, 14.47], [-6.680000000000007, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.529999999999973, 14.97], [-7.680000000000007, 15.32], [-7.75, 15.35], [-8.0, 15.25], [-8.529999999999973, 15.47], [-8.75, 16.0], [-8.649999999999977, 16.25], [-8.75, 16.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.396195681894596}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.824004380037681}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.61895762525279, 21.383246114628662, 21.28995349968841, 20.98075761466282]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.615813289340792, 19.441667273804228, 19.003876766811572, 18.952707298694065]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7334855450194584, -3.648899870753877, -3.767507831685889, -4.092483481569588]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.917208731539006, -3.944341049484251, -4.013854964426741, -4.396195681894596]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3929715965757412, -1.3824373458312222, -1.3955583171672061, -1.4928011127871568]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4752508763953305, -1.4715006081706352, -1.43806556072718, -1.5748913780110128]}}