{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:50.605767", "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-Sep-08_to_2022-Sep-10_359.0_13.0"}, "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": 2022090000392}, "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 08 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 10 2022"}, "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": 72356.60044621943}, "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": ["Burkina Faso", "Niger"]}, "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": 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": 0.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 2.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-1.18, 13.68], [-1.03, 14.03], [-0.5, 14.25], [-0.25, 14.15], [-0.18, 14.18], [-0.03, 14.53], [0.5, 14.75], [0.75, 14.65], [1.0, 14.75], [1.53, 14.53], [1.75, 14.0], [1.65, 13.75], [1.68, 13.68], [1.75, 13.65], [2.0, 13.75], [2.53, 13.53], [2.75, 13.0], [2.53, 12.47], [2.18, 12.32], [2.03, 11.97], [1.5, 11.75], [1.2, 11.88], [1.15, 11.75], [1.25, 11.5], [1.03, 10.97], [0.5, 10.75], [0.25, 10.85], [0.0, 10.75], [-0.25, 10.85], [-0.5, 10.75], [-1.03, 10.97], [-1.18, 11.32], [-1.53, 11.47], [-1.75, 12.0], [-1.54, 12.5], [-1.75, 13.0], [-1.53, 13.53], [-1.18, 13.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.75, 13.0], [-1.53, 13.53], [-1.18, 13.68], [-1.03, 14.03], [-0.5, 14.25], [-0.25, 14.15], [-0.18, 14.18], [-0.03, 14.53], [0.5, 14.75], [0.75, 14.65], [1.0, 14.75], [1.53, 14.53], [1.75, 14.0], [1.65, 13.75], [1.68, 13.68], [1.75, 13.65], [2.0, 13.75], [2.53, 13.53], [2.75, 13.0], [2.53, 12.47], [2.18, 12.32], [2.03, 11.97], [1.5, 11.75], [1.2, 11.88], [1.15, 11.75], [1.25, 11.5], [1.03, 10.97], [0.5, 10.75], [0.25, 10.85], [0.0, 10.75], [-0.25, 10.85], [-0.5, 10.75], [-1.03, 10.97], [-1.18, 11.32], [-1.53, 11.47], [-1.75, 12.0], [-1.54, 12.5], [-1.75, 13.0]]]]}, "2022-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.75, 13.0], [-1.53, 13.53], [-1.18, 13.68], [-1.03, 14.03], [-0.5, 14.25], [-0.25, 14.15], [-0.18, 14.18], [-0.03, 14.53], [0.5, 14.75], [0.75, 14.65], [1.0, 14.75], [1.53, 14.53], [1.75, 14.0], [1.65, 13.75], [1.68, 13.68], [1.75, 13.65], [2.0, 13.75], [2.53, 13.53], [2.75, 13.0], [2.53, 12.47], [2.18, 12.32], [2.03, 11.97], [1.5, 11.75], [1.2, 11.88], [1.15, 11.75], [1.25, 11.5], [1.03, 10.97], [0.5, 10.75], [0.25, 10.85], [0.0, 10.75], [-0.25, 10.85], [-0.5, 10.75], [-1.03, 10.97], [-1.18, 11.32], [-1.53, 11.47], [-1.75, 12.0], [-1.54, 12.5], [-1.75, 13.0]]]]}, "2022-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.75, 13.0], [-1.53, 13.53], [-1.18, 13.68], [-1.03, 14.03], [-0.5, 14.25], [-0.25, 14.15], [-0.18, 14.18], [-0.03, 14.53], [0.5, 14.75], [0.75, 14.65], [1.0, 14.75], [1.53, 14.53], [1.75, 14.0], [1.65, 13.75], [1.68, 13.68], [1.75, 13.65], [2.0, 13.75], [2.53, 13.53], [2.75, 13.0], [2.53, 12.47], [2.18, 12.32], [2.03, 11.97], [1.5, 11.75], [1.2, 11.88], [1.15, 11.75], [1.25, 11.5], [1.03, 10.97], [0.5, 10.75], [0.25, 10.85], [0.0, 10.75], [-0.25, 10.85], [-0.5, 10.75], [-1.03, 10.97], [-1.18, 11.32], [-1.53, 11.47], [-1.75, 12.0], [-1.54, 12.5], [-1.75, 13.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3120859632882684}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1119991234834568}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.580284787620542, 25.049390490183498, 25.7831573795861]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.392285598043088, 23.847337481673094, 24.49084004462071]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.911127735587453, -2.530832458781427, -1.8940371760814902]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3503943656988326, -3.3120859632882684, -2.211241024265007]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5624244778278746, -2.0373688943024524, -1.4970662745857357]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7628145565416917, -2.5253376509765655, -1.7218375907272905]}}