{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:06.552883", "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-Aug-02_to_2022-Aug-05_344.5_21.5"}, "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": 2022080000183}, "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": "August 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 05 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": 83788.71147946944}, "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": 21.5}, "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": 344.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "344.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 347.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-16.68, 21.68], [-16.65, 21.75], [-16.75, 22.0], [-16.53, 22.53], [-16.0, 22.75], [-15.75, 22.65], [-15.5, 22.75], [-14.97, 22.53], [-14.82, 22.18], [-14.75, 22.15], [-14.5, 22.25], [-14.25, 22.15], [-14.0, 22.25], [-13.47, 22.03], [-13.32, 21.68], [-13.25, 21.65], [-13.0, 21.75], [-12.47, 21.53], [-12.25, 21.0], [-12.35, 20.75], [-12.25, 20.5], [-12.47, 19.97], [-12.82, 19.82], [-12.97, 19.47], [-13.5, 19.25], [-13.75, 19.35], [-14.0, 19.25], [-14.25, 19.35], [-14.5, 19.25], [-14.75, 19.35], [-15.0, 19.25], [-15.25, 19.35], [-15.5, 19.25], [-15.75, 19.35], [-16.0, 19.25], [-16.53, 19.47], [-16.68, 19.82], [-17.03, 19.97], [-17.25, 20.5], [-17.15, 20.75], [-17.25, 21.0], [-17.03, 21.53], [-16.68, 21.68]]]]}}, "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": {"2022-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.029999999999973, 20.47], [-17.25, 21.0], [-17.029999999999973, 21.53], [-16.680000000000007, 21.68], [-16.649999999999977, 21.75], [-16.75, 22.0], [-16.529999999999973, 22.53], [-16.0, 22.75], [-15.75, 22.65], [-15.5, 22.75], [-14.970000000000027, 22.53], [-14.819999999999993, 22.18], [-14.75, 22.15], [-14.5, 22.25], [-14.25, 22.15], [-14.0, 22.25], [-13.470000000000027, 22.03], [-13.25, 21.5], [-13.470000000000027, 20.97], [-13.819999999999993, 20.82], [-13.850000000000023, 20.75], [-13.75, 20.5], [-13.970000000000027, 19.97], [-14.5, 19.75], [-14.75, 19.85], [-14.819999999999993, 19.82], [-14.970000000000027, 19.47], [-15.5, 19.25], [-16.029999999999973, 19.47], [-16.180000000000007, 19.82], [-16.529999999999973, 19.97], [-16.680000000000007, 20.32], [-17.029999999999973, 20.47]]]]}, "2022-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 21.0], [-17.029999999999973, 21.53], [-16.680000000000007, 21.68], [-16.649999999999977, 21.75], [-16.75, 22.0], [-16.529999999999973, 22.53], [-16.0, 22.75], [-15.75, 22.65], [-15.5, 22.75], [-14.970000000000027, 22.53], [-14.819999999999993, 22.18], [-14.75, 22.15], [-14.5, 22.25], [-14.25, 22.15], [-14.0, 22.25], [-13.470000000000027, 22.03], [-13.319999999999993, 21.68], [-13.25, 21.65], [-13.0, 21.75], [-12.470000000000027, 21.53], [-12.25, 21.0], [-12.350000000000023, 20.75], [-12.25, 20.5], [-12.470000000000027, 19.97], [-12.819999999999993, 19.82], [-12.970000000000027, 19.47], [-13.5, 19.25], [-13.75, 19.35], [-14.0, 19.25], [-14.25, 19.35], [-14.5, 19.25], [-14.75, 19.35], [-15.0, 19.25], [-15.25, 19.35], [-15.5, 19.25], [-15.75, 19.35], [-16.0, 19.25], [-16.529999999999973, 19.47], [-16.680000000000007, 19.82], [-17.029999999999973, 19.97], [-17.25, 20.5], [-17.149999999999977, 20.75], [-17.25, 21.0]]]]}, "2022-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 21.0], [-17.029999999999973, 21.53], [-16.680000000000007, 21.68], [-16.649999999999977, 21.75], [-16.75, 22.0], [-16.529999999999973, 22.53], [-16.0, 22.75], [-15.75, 22.65], [-15.5, 22.75], [-14.970000000000027, 22.53], [-14.819999999999993, 22.18], [-14.75, 22.15], [-14.5, 22.25], [-14.25, 22.15], [-14.0, 22.25], [-13.470000000000027, 22.03], [-13.319999999999993, 21.68], [-13.25, 21.65], [-13.0, 21.75], [-12.470000000000027, 21.53], [-12.25, 21.0], [-12.350000000000023, 20.75], [-12.25, 20.5], [-12.470000000000027, 19.97], [-12.819999999999993, 19.82], [-12.970000000000027, 19.47], [-13.5, 19.25], [-13.75, 19.35], [-14.0, 19.25], [-14.25, 19.35], [-14.5, 19.25], [-14.75, 19.35], [-15.0, 19.25], [-15.25, 19.35], [-15.5, 19.25], [-15.75, 19.35], [-16.0, 19.25], [-16.529999999999973, 19.47], [-16.680000000000007, 19.82], [-17.029999999999973, 19.97], [-17.25, 20.5], [-17.149999999999977, 20.75], [-17.25, 21.0]]]]}, "2022-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 21.0], [-17.029999999999973, 21.53], [-16.680000000000007, 21.68], [-16.649999999999977, 21.75], [-16.75, 22.0], [-16.529999999999973, 22.53], [-16.0, 22.75], [-15.75, 22.65], [-15.5, 22.75], [-14.970000000000027, 22.53], [-14.819999999999993, 22.18], [-14.75, 22.15], [-14.5, 22.25], [-14.25, 22.15], [-14.0, 22.25], [-13.470000000000027, 22.03], [-13.319999999999993, 21.68], [-13.25, 21.65], [-13.0, 21.75], [-12.470000000000027, 21.53], [-12.25, 21.0], [-12.350000000000023, 20.75], [-12.25, 20.5], [-12.470000000000027, 19.97], [-12.819999999999993, 19.82], [-12.970000000000027, 19.47], [-13.5, 19.25], [-13.75, 19.35], [-14.0, 19.25], [-14.25, 19.35], [-14.5, 19.25], [-14.75, 19.35], [-15.0, 19.25], [-15.25, 19.35], [-15.5, 19.25], [-15.75, 19.35], [-16.0, 19.25], [-16.529999999999973, 19.47], [-16.680000000000007, 19.82], [-17.029999999999973, 19.97], [-17.25, 20.5], [-17.149999999999977, 20.75], [-17.25, 21.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.669334747999301}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.134919695990201}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.17046106844373, 28.130475940672625, 28.00952945504929, 28.148461746745966]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.720251387418216, 23.014069692264115, 23.087532843831525, 22.978172925020942]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7173668568974363, -4.162327143830518, -4.31185573533515, -4.1753485627558655]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.16445823680408, -5.345022621625901, -5.669334747999301, -5.442631127335346]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6193252143459038, -1.9949435682425445, -2.0635269454753424, -1.9610757444266842]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1547035157388463, -2.474553072716942, -2.5876814186238444, -2.465329884589706]}}