{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:20.197666", "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": "2021-Oct-20_to_2021-Oct-22_358.0_20.0"}, "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": 2021100000706}, "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": "October 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 22 2021"}, "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": 52108.604492908475}, "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"]}, "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": 20.0}, "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": 358.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "358.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 355.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.0}, "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": [[[[-4.5, 22.75], [-4.25, 22.65], [-4.0, 22.75], [-3.47, 22.53], [-3.32, 22.18], [-3.25, 22.15], [-3.0, 22.25], [-2.47, 22.03], [-2.32, 21.68], [-1.97, 21.53], [-1.75, 21.0], [-1.85, 20.75], [-1.82, 20.68], [-1.47, 20.53], [-1.25, 20.0], [-1.35, 19.75], [-1.25, 19.5], [-1.47, 18.97], [-1.82, 18.82], [-1.97, 18.47], [-2.5, 18.25], [-2.75, 18.35], [-3.0, 18.25], [-3.53, 18.47], [-3.68, 18.82], [-4.03, 18.97], [-4.25, 19.5], [-4.03, 20.03], [-3.68, 20.18], [-3.65, 20.25], [-3.68, 20.32], [-4.03, 20.47], [-4.2, 20.88], [-4.5, 20.75], [-5.03, 20.97], [-5.25, 21.5], [-5.15, 21.75], [-5.25, 22.0], [-5.03, 22.53], [-4.5, 22.75]]]]}}, "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": {"2021-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 22.0], [-5.029999999999973, 22.53], [-4.5, 22.75], [-4.25, 22.65], [-4.0, 22.75], [-3.4700000000000273, 22.53], [-3.319999999999993, 22.18], [-3.25, 22.15], [-3.0, 22.25], [-2.4700000000000273, 22.03], [-2.319999999999993, 21.68], [-1.9700000000000273, 21.53], [-1.75, 21.0], [-1.8500000000000227, 20.75], [-1.8199999999999932, 20.68], [-1.4700000000000273, 20.53], [-1.25, 20.0], [-1.3500000000000227, 19.75], [-1.25, 19.5], [-1.4700000000000273, 18.97], [-1.8199999999999932, 18.82], [-1.9700000000000273, 18.47], [-2.5, 18.25], [-2.75, 18.35], [-3.0, 18.25], [-3.5299999999999727, 18.47], [-3.680000000000007, 18.82], [-4.029999999999973, 18.97], [-4.25, 19.5], [-4.029999999999973, 20.03], [-3.680000000000007, 20.18], [-3.6499999999999773, 20.25], [-3.680000000000007, 20.32], [-4.029999999999973, 20.47], [-4.199999999999989, 20.88], [-4.5, 20.75], [-5.029999999999973, 20.97], [-5.25, 21.5], [-5.149999999999977, 21.75], [-5.25, 22.0]]]]}, "2021-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 22.0], [-5.029999999999973, 22.53], [-4.5, 22.75], [-4.25, 22.65], [-4.0, 22.75], [-3.4700000000000273, 22.53], [-3.319999999999993, 22.18], [-3.25, 22.15], [-3.0, 22.25], [-2.4700000000000273, 22.03], [-2.319999999999993, 21.68], [-1.9700000000000273, 21.53], [-1.75, 21.0], [-1.8500000000000227, 20.75], [-1.8199999999999932, 20.68], [-1.4700000000000273, 20.53], [-1.25, 20.0], [-1.3500000000000227, 19.75], [-1.25, 19.5], [-1.4700000000000273, 18.97], [-1.8199999999999932, 18.82], [-1.9700000000000273, 18.47], [-2.5, 18.25], [-2.75, 18.35], [-3.0, 18.25], [-3.5299999999999727, 18.47], [-3.680000000000007, 18.82], [-4.029999999999973, 18.97], [-4.25, 19.5], [-4.029999999999973, 20.03], [-3.680000000000007, 20.18], [-3.6499999999999773, 20.25], [-3.680000000000007, 20.32], [-4.029999999999973, 20.47], [-4.199999999999989, 20.88], [-4.5, 20.75], [-5.029999999999973, 20.97], [-5.25, 21.5], [-5.149999999999977, 21.75], [-5.25, 22.0]]]]}, "2021-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 22.0], [-5.029999999999973, 22.53], [-4.5, 22.75], [-4.25, 22.65], [-4.0, 22.75], [-3.4700000000000273, 22.53], [-3.319999999999993, 22.18], [-3.25, 22.15], [-3.0, 22.25], [-2.4700000000000273, 22.03], [-2.319999999999993, 21.68], [-1.9700000000000273, 21.53], [-1.75, 21.0], [-1.8500000000000227, 20.75], [-1.8199999999999932, 20.68], [-1.4700000000000273, 20.53], [-1.25, 20.0], [-1.3500000000000227, 19.75], [-1.25, 19.5], [-1.4700000000000273, 18.97], [-1.8199999999999932, 18.82], [-1.9700000000000273, 18.47], [-2.5, 18.25], [-2.75, 18.35], [-3.0, 18.25], [-3.5299999999999727, 18.47], [-3.680000000000007, 18.82], [-4.029999999999973, 18.97], [-4.25, 19.5], [-4.029999999999973, 20.03], [-3.680000000000007, 20.18], [-3.6499999999999773, 20.25], [-3.680000000000007, 20.32], [-4.029999999999973, 20.47], [-4.199999999999989, 20.88], [-4.5, 20.75], [-5.029999999999973, 20.97], [-5.25, 21.5], [-5.149999999999977, 21.75], [-5.25, 22.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.002299641952618}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.488688014627584}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.833524953176607, 25.125492141907387, 25.58850943706119]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.9535233781109, 24.664743431428974, 24.99239905055748]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.376149896505167, -3.880885122281629, -3.2090290250959552]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8307030995177342, -4.002299641952618, -3.6237611744807054]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5819088816687934, -1.7749229026019655, -1.4543203961063034]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7874649663895743, -1.9493668067644947, -1.5593665132441368]}}