{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:15.941964", "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": "2024-Oct-03_to_2024-Oct-06_10.5_13.5"}, "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": 2024100000113}, "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 03 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 06 2024"}, "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": 93313.19030319652}, "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": ["Niger", "Nigeria"]}, "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": 13.5}, "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": 10.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 13.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.0}, "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": [[[[8.82, 14.18], [8.97, 14.53], [9.5, 14.75], [9.75, 14.65], [10.0, 14.75], [10.25, 14.65], [10.5, 14.75], [10.75, 14.65], [11.0, 14.75], [11.25, 14.65], [11.5, 14.75], [11.75, 14.65], [12.0, 14.75], [12.53, 14.53], [12.68, 14.18], [13.03, 14.03], [13.18, 13.68], [13.53, 13.53], [13.75, 13.0], [13.53, 12.47], [13.0, 12.25], [12.75, 12.35], [12.68, 12.32], [12.53, 11.97], [12.0, 11.75], [11.75, 11.85], [11.68, 11.82], [11.53, 11.47], [11.0, 11.25], [10.75, 11.35], [10.5, 11.25], [10.0, 11.46], [9.5, 11.25], [8.97, 11.47], [8.75, 12.0], [8.85, 12.25], [8.75, 12.5], [8.85, 12.75], [8.82, 12.82], [8.47, 12.97], [8.25, 13.5], [8.47, 14.03], [8.82, 14.18]]]]}}, "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": {"2024-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 14.53], [11.0, 14.75], [11.25, 14.65], [11.5, 14.75], [11.75, 14.65], [12.0, 14.75], [12.53, 14.53], [12.68, 14.18], [13.03, 14.03], [13.25, 13.5], [13.03, 12.97], [12.5, 12.75], [12.25, 12.85], [12.0, 12.75], [11.75, 12.85], [11.5, 12.75], [11.0, 12.96], [10.5, 12.75], [9.97, 12.97], [9.75, 13.5], [9.97, 14.03], [10.32, 14.18], [10.47, 14.53]]]]}, "2024-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 12.97], [8.25, 13.5], [8.47, 14.03], [8.82, 14.18], [8.97, 14.53], [9.5, 14.75], [9.75, 14.65], [10.0, 14.75], [10.25, 14.65], [10.5, 14.75], [10.75, 14.65], [11.0, 14.75], [11.25, 14.65], [11.5, 14.75], [11.75, 14.65], [12.0, 14.75], [12.53, 14.53], [12.68, 14.18], [13.03, 14.03], [13.18, 13.68], [13.53, 13.53], [13.75, 13.0], [13.53, 12.47], [13.0, 12.25], [12.75, 12.35], [12.68, 12.32], [12.53, 11.97], [12.0, 11.75], [11.75, 11.85], [11.68, 11.82], [11.53, 11.47], [11.0, 11.25], [10.75, 11.35], [10.5, 11.25], [10.0, 11.46], [9.5, 11.25], [8.97, 11.47], [8.75, 12.0], [8.85, 12.25], [8.75, 12.5], [8.85, 12.75], [8.82, 12.82], [8.47, 12.97]]]]}, "2024-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 12.97], [8.25, 13.5], [8.47, 14.03], [8.82, 14.18], [8.97, 14.53], [9.5, 14.75], [9.75, 14.65], [10.0, 14.75], [10.25, 14.65], [10.5, 14.75], [10.75, 14.65], [11.0, 14.75], [11.25, 14.65], [11.5, 14.75], [11.75, 14.65], [12.0, 14.75], [12.53, 14.53], [12.68, 14.18], [13.03, 14.03], [13.18, 13.68], [13.53, 13.53], [13.75, 13.0], [13.53, 12.47], [13.0, 12.25], [12.75, 12.35], [12.68, 12.32], [12.53, 11.97], [12.0, 11.75], [11.75, 11.85], [11.68, 11.82], [11.53, 11.47], [11.0, 11.25], [10.75, 11.35], [10.5, 11.25], [10.0, 11.46], [9.5, 11.25], [8.97, 11.47], [8.75, 12.0], [8.85, 12.25], [8.75, 12.5], [8.85, 12.75], [8.82, 12.82], [8.47, 12.97]]]]}, "2024-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 12.97], [8.25, 13.5], [8.47, 14.03], [8.82, 14.18], [8.97, 14.53], [9.5, 14.75], [9.75, 14.65], [10.0, 14.75], [10.25, 14.65], [10.5, 14.75], [11.0, 14.54], [11.5, 14.75], [11.75, 14.65], [12.0, 14.75], [12.53, 14.53], [12.68, 14.18], [13.03, 14.03], [13.18, 13.68], [13.53, 13.53], [13.75, 13.0], [13.53, 12.47], [13.0, 12.25], [12.75, 12.35], [12.68, 12.32], [12.53, 11.97], [12.0, 11.75], [11.75, 11.85], [11.68, 11.82], [11.53, 11.47], [11.0, 11.25], [10.75, 11.35], [10.5, 11.25], [10.0, 11.46], [9.5, 11.25], [8.97, 11.47], [8.75, 12.0], [8.85, 12.25], [8.75, 12.5], [8.85, 12.75], [8.82, 12.82], [8.47, 12.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.630571852697244}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3326729950539917}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.811227235340027, 27.459306089339748, 27.631293438326963, 27.590878465440596]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.623738861084007, 25.970625813802087, 26.192444101969443, 25.958299255371116]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8161089543254516, -2.45764691970171, -2.3208228163331834, -2.3363100670995114]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.06840270928609, -3.4314203172932594, -3.630571852697244, -3.2339118034598755]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5071681834585835, -2.0678280366608006, -1.9519539390106442, -1.976282849956832]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6614528231785826, -2.6719308693701067, -3.1271809238923485, -2.657663852759384]}}