{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:28.805996", "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-Sep-17_to_2021-Sep-21_19.0_19.5"}, "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": 2021090000613}, "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": "September 17 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 21 2021"}, "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": 208994.823157763}, "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", "Libya"]}, "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": 19.5}, "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": 19.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.0}, "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": 17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[17.0, 19.25], [17.25, 19.15], [17.32, 19.18], [17.35, 19.25], [17.25, 19.5], [17.35, 19.75], [17.25, 20.0], [17.47, 20.53], 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[16.47, 19.03], [17.0, 19.25]]]]}}, "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": {"2021-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.75, 20.5], [17.85, 20.75], [17.75, 21.0], [17.97, 21.53], [18.32, 21.68], [18.35, 21.75], [18.25, 22.0], [18.35, 22.25], [18.25, 22.5], [18.47, 23.03], [18.82, 23.18], [18.97, 23.53], [19.5, 23.75], [19.75, 23.65], [20.0, 23.75], [20.53, 23.53], [20.75, 23.0], [20.57, 22.57], [20.82, 22.68], [20.97, 23.03], [21.32, 23.18], [21.47, 23.53], [22.0, 23.75], [22.53, 23.53], [22.75, 23.0], [22.65, 22.75], [22.75, 22.5], [22.65, 22.25], [22.75, 22.0], [22.65, 21.75], [22.68, 21.68], [23.03, 21.53], [23.25, 21.0], [23.03, 20.47], [22.68, 20.32], [22.53, 19.97], [22.0, 19.75], [21.5, 19.96], [21.0, 19.75], [20.5, 19.96], [20.18, 19.82], 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"description": "Mean t2m anomaly over entire duration", "value": -2.919757228853652}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.97312342373192, 26.946132625568907, 26.988879913275525, 29.472135012351373, 28.636337211461125]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.60922533608391, 19.56552584062746, 19.828582731881284, 23.510675639740555, 28.636337211461125]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.193750816968946, -3.142429004754269, -2.9912013524744543, -2.1591864975965493, -1.7544853652143502]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8923172921086007, -3.790610124784166, -3.6132669274989553, -2.722681296191695, -1.7544853652143502]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.685667375674461, -1.925331300920905, -1.8958980335410638, -1.56873440921829, -1.5175422630135302]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.173002428553697, -2.329163158164091, -2.3549771828814214, -1.8476731491162481, -1.5175422630135302]}}