{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:57.032653", "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": "2025-Jan-15_to_2025-Jan-21_345.0_15.0"}, "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": 2025010000425}, "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": "January 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 53735.07567936683}, "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", "Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 15.0}, "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": 345.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-12.68, 15.68], [-12.53, 16.03], [-12.18, 16.18], [-12.03, 16.53], [-11.5, 16.75], [-10.97, 16.53], [-10.75, 16.0], [-10.85, 15.75], [-10.75, 15.5], [-10.97, 14.97], [-11.37, 14.8], [-11.25, 14.5], [-11.47, 13.97], [-12.0, 13.75], [-12.5, 13.96], [-13.0, 13.75], [-13.5, 13.96], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-14.75, 13.85], [-15.0, 13.75], [-15.53, 13.97], [-15.68, 14.32], [-15.75, 14.35], [-16.0, 14.25], [-16.53, 14.47], [-16.75, 15.0], [-16.53, 15.53], [-16.18, 15.68], [-16.03, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.0, 16.25], [-14.47, 16.03], [-14.32, 15.68], [-14.25, 15.65], [-14.0, 15.75], [-13.75, 15.65], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.75, 15.65], [-12.68, 15.68]]]]}}, "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": {"2025-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.5, 14.25], [-16.029999999999973, 14.47], [-16.25, 15.0], [-16.029999999999973, 15.53], [-15.5, 15.75], [-15.25, 15.65], [-15.0, 15.75], [-14.470000000000027, 15.53], [-14.25, 15.0], [-14.470000000000027, 14.47], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25]]]]}, "2025-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.029999999999973, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.0, 16.25], [-14.470000000000027, 16.03], [-14.319999999999993, 15.68], [-14.25, 15.65], [-14.0, 15.75], [-13.75, 15.65], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.699999999999989, 15.62], [-12.529999999999973, 16.03], [-12.0, 16.25], [-11.470000000000027, 16.03], [-11.25, 15.5], [-11.470000000000027, 14.97], [-12.0, 14.75], [-12.300000000000011, 14.88], [-12.470000000000027, 14.47], [-13.0, 14.25], [-13.25, 14.35], [-13.319999999999993, 14.32], [-13.470000000000027, 13.97], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-14.75, 13.85], [-15.0, 13.75], [-15.529999999999973, 13.97], [-15.680000000000007, 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15.53], [-15.0, 15.75], [-14.470000000000027, 15.53], [-14.25, 15.0], [-14.470000000000027, 14.47], [-15.0, 14.25], [-15.529999999999973, 14.47], [-15.75, 15.0], [-15.529999999999973, 15.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.071282735740283}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7056310869878084}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.163580830891988, 21.580643345759484, 20.140146297878744, 20.836170733416452, 21.205157781530374, 21.186516571044876, 20.37506001790365]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.149746195475302, 20.302022552490257, 18.8659492492676, 19.27186228434249, 19.804568227132165, 19.737004852294945, 20.37506001790365]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5161728111324067, -2.9064369233156, -4.457679301723902, -3.6900178319290546, -3.6285633877051597, -3.8296565532312115, -3.2917244545720337]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5604056196643796, -3.3968693545197652, -5.071282735740283, -4.48364826616023, -3.9900836349781343, -4.024938147305704, -3.2917244545720337]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4597161720480556, -1.6062817777726885, -2.3601893745686087, -1.880145087002569, -1.6721974649494051, -1.7577896080632527, -1.6240182152528022]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4761338415369698, -1.9358423059476269, -2.6836267466310497, -2.1828652170894745, -1.8301381682935238, -1.9112422412807686, -1.6240182152528022]}}