{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:55.823159", "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-Jan-30_to_2022-Feb-03_17.5_11.5"}, "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": 2022010001150}, "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": "January 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 03 2022"}, "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": 54545.276060019925}, "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": ["Chad"]}, "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": 11.5}, "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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.75, 11.65], [15.82, 11.68], [15.97, 12.03], [16.5, 12.25], [16.75, 12.15], [16.82, 12.18], [16.97, 12.53], [17.32, 12.68], [17.47, 13.03], [18.0, 13.25], [18.25, 13.15], [18.5, 13.25], [18.75, 13.15], [19.0, 13.25], [19.53, 13.03], [19.75, 12.5], [19.53, 11.97], [19.0, 11.75], [18.75, 11.85], [18.68, 11.82], [18.65, 11.75], [18.75, 11.5], [18.53, 10.97], [18.18, 10.82], [18.03, 10.47], [17.68, 10.32], [17.53, 9.97], [17.0, 9.75], [16.75, 9.85], [16.5, 9.75], [16.25, 9.85], [16.0, 9.75], [15.75, 9.85], [15.5, 9.75], [14.97, 9.97], [14.75, 10.5], [14.85, 10.75], [14.75, 11.0], [14.97, 11.53], [15.5, 11.75], [15.75, 11.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 11.0], [14.97, 11.53], [15.5, 11.75], [15.75, 11.65], [15.82, 11.68], [15.97, 12.03], [16.5, 12.25], [16.75, 12.15], [17.0, 12.25], [17.25, 12.15], [17.32, 12.18], [17.35, 12.25], [17.25, 12.5], [17.47, 13.03], [18.0, 13.25], [18.25, 13.15], [18.5, 13.25], [18.75, 13.15], [19.0, 13.25], [19.53, 13.03], [19.75, 12.5], [19.53, 11.97], [19.0, 11.75], [18.75, 11.85], [18.68, 11.82], [18.65, 11.75], [18.75, 11.5], [18.53, 10.97], [18.18, 10.82], [18.03, 10.47], [17.68, 10.32], [17.53, 9.97], [17.0, 9.75], [16.75, 9.85], [16.5, 9.75], [16.25, 9.85], [16.0, 9.75], [15.75, 9.85], [15.5, 9.75], [14.97, 9.97], [14.75, 10.5], [14.85, 10.75], [14.75, 11.0]]]]}, "2022-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 11.0], [14.97, 11.53], [15.5, 11.75], [15.75, 11.65], [15.82, 11.68], [15.97, 12.03], [16.5, 12.25], [16.75, 12.15], [17.0, 12.25], [17.25, 12.15], [17.32, 12.18], [17.35, 12.25], [17.25, 12.5], [17.47, 13.03], [18.0, 13.25], [18.25, 13.15], [18.5, 13.25], [18.75, 13.15], [19.0, 13.25], [19.53, 13.03], [19.75, 12.5], [19.53, 11.97], [19.0, 11.75], [18.75, 11.85], [18.68, 11.82], [18.65, 11.75], [18.75, 11.5], [18.53, 10.97], [18.18, 10.82], [18.03, 10.47], [17.68, 10.32], [17.53, 9.97], [17.0, 9.75], [16.75, 9.85], [16.5, 9.75], [16.25, 9.85], [16.0, 9.75], [15.75, 9.85], [15.5, 9.75], [14.97, 9.97], [14.75, 10.5], [14.85, 10.75], [14.75, 11.0]]]]}, "2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 11.0], [14.97, 11.53], [15.5, 11.75], [15.75, 11.65], [15.82, 11.68], [15.97, 12.03], [16.5, 12.25], [16.75, 12.15], [16.82, 12.18], [16.97, 12.53], [17.32, 12.68], [17.47, 13.03], [18.0, 13.25], [18.25, 13.15], [18.5, 13.25], [18.75, 13.15], [19.0, 13.25], [19.53, 13.03], [19.75, 12.5], [19.53, 11.97], [19.0, 11.75], [18.75, 11.85], [18.68, 11.82], [18.65, 11.75], [18.75, 11.5], [18.53, 10.97], [18.18, 10.82], [18.03, 10.47], [17.68, 10.32], [17.53, 9.97], [17.0, 9.75], [16.75, 9.85], [16.5, 9.75], [16.25, 9.85], [16.0, 9.75], [15.75, 9.85], [15.5, 9.75], [14.97, 9.97], [14.75, 10.5], [14.85, 10.75], [14.75, 11.0]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, 12.53], [17.32, 12.68], [17.47, 13.03], [18.0, 13.25], [18.25, 13.15], [18.5, 13.25], [19.03, 13.03], [19.25, 12.5], [19.03, 11.97], [18.5, 11.75], [18.25, 11.85], [18.18, 11.82], [18.15, 11.75], [18.25, 11.5], [18.03, 10.97], [17.5, 10.75], [17.25, 10.85], [17.0, 10.75], [16.47, 10.97], [16.25, 11.5], [16.47, 12.03], [16.82, 12.18], [16.97, 12.53]]]]}, "2022-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, 12.53], [17.5, 12.75], [18.03, 12.53], [18.25, 12.0], [18.15, 11.75], [18.25, 11.5], [18.03, 10.97], [17.5, 10.75], [17.25, 10.85], [17.0, 10.75], [16.47, 10.97], [16.25, 11.5], [16.47, 12.03], [16.82, 12.18], [16.97, 12.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.436705523857029}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.653140744953969}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.387008001056017, 23.383141638645327, 22.732343082297007, 23.099517684953298, 23.405040685882398]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.221626581339137, 22.258556321272977, 21.61620587408646, 22.53142520844449, 23.086427211547516]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3727666271019996, -3.4323711057026403, -4.167090526456848, -3.5099967672555636, -3.64782997568606]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6695563762662005, -3.679969151522414, -4.436705523857029, -3.6383119392796175, -3.6960643910669546]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3683167473888096, -1.4133863164869924, -1.7282380019607595, -1.4268933756153508, -1.4819708780500074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4493335324536563, -1.5670078162416787, -1.8123908321965925, -1.455134354562964, -1.5431327493205267]}}