{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:35.030633", "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-Jul-13_to_2022-Jul-16_20.5_16.0"}, "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": 2022070000620}, "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 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 16 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": 53376.54326654643}, "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": 16.0}, "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": 20.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.25, 17.65], [21.5, 17.75], [21.75, 17.65], [21.82, 17.68], [21.97, 18.03], [22.5, 18.25], [23.03, 18.03], [23.25, 17.5], [23.03, 16.97], [22.68, 16.82], [22.65, 16.75], [22.75, 16.5], [22.53, 15.97], [22.18, 15.82], [22.15, 15.75], [22.25, 15.5], [22.03, 14.97], [21.5, 14.75], [21.25, 14.85], [21.0, 14.75], [20.47, 14.97], [20.32, 15.32], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.82, 15.82], [18.47, 15.97], [18.25, 16.5], [18.47, 17.03], [19.0, 17.25]]]]}}, "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": {"2022-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, 18.03], [22.5, 18.25], [23.03, 18.03], [23.25, 17.5], [23.03, 16.97], [22.5, 16.75], [21.97, 16.97], [21.75, 17.5], [21.97, 18.03]]]]}, "2022-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 15.97], [18.25, 16.5], [18.47, 17.03], [19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.25, 17.65], [21.5, 17.75], [21.75, 17.65], [21.82, 17.68], [21.97, 18.03], [22.5, 18.25], [23.03, 18.03], [23.25, 17.5], [23.03, 16.97], [22.68, 16.82], [22.65, 16.75], [22.75, 16.5], [22.53, 15.97], [22.18, 15.82], [22.15, 15.75], [22.25, 15.5], [22.03, 14.97], [21.5, 14.75], [21.25, 14.85], [21.0, 14.75], [20.47, 14.97], [20.32, 15.32], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.82, 15.82], [18.47, 15.97]]]]}, "2022-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 15.97], [18.25, 16.5], [18.47, 17.03], [19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.25, 17.65], [21.5, 17.75], [21.75, 17.65], [21.82, 17.68], [21.97, 18.03], [22.5, 18.25], [23.03, 18.03], [23.25, 17.5], [23.03, 16.97], [22.68, 16.82], [22.65, 16.75], [22.75, 16.5], [22.53, 15.97], [22.18, 15.82], [22.15, 15.75], [22.25, 15.5], [22.03, 14.97], [21.5, 14.75], [21.25, 14.85], [21.0, 14.75], [20.47, 14.97], [20.32, 15.32], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.82, 15.82], [18.47, 15.97]]]]}, "2022-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 15.97], [18.25, 16.5], [18.47, 17.03], [19.0, 17.25], [19.25, 17.15], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.25, 17.65], [21.5, 17.75], [21.75, 17.65], [22.0, 17.75], [22.53, 17.53], [22.75, 17.0], [22.65, 16.75], [22.75, 16.5], [22.53, 15.97], [22.18, 15.82], [22.15, 15.75], [22.25, 15.5], [22.03, 14.97], [21.5, 14.75], [21.25, 14.85], [21.0, 14.75], [20.47, 14.97], [20.32, 15.32], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.82, 15.82], [18.47, 15.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8962165942480738}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.840000299076639}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.101133821439475, 29.286667588645855, 28.973403465006072, 28.339144894762512]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.101133821439475, 26.7598979461431, 26.43392894739003, 26.275432485579984]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4214453403683933, -2.539331716367125, -2.726163056331883, -3.3035097000698803]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4214453403683933, -3.172463975356891, -3.306217422007535, -3.8962165942480738]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6436840152632548, -1.500478198405994, -1.617408369751248, -1.89192444124265]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6436840152632548, -1.7414069821756846, -1.9113949165197577, -2.4169076221534835]}}