{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:07.910396", "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": "2013-Aug-12_to_2013-Aug-15_16.5_20.5"}, "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": 2013080000618}, "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": "August 12 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2013"}, "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": 52187.481328940805}, "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", "Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 20.5}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 22.03], [15.0, 22.25], [15.25, 22.15], [15.5, 22.25], [16.03, 22.03], [16.25, 21.5], [16.15, 21.25], [16.18, 21.18], [16.25, 21.15], [16.5, 21.25], [16.75, 21.15], [17.0, 21.25], [17.25, 21.15], [17.5, 21.25], [18.03, 21.03], [18.25, 20.5], [18.15, 20.25], [18.25, 20.0], [18.03, 19.47], [17.68, 19.32], [17.53, 18.97], [17.18, 18.82], [17.03, 18.47], [16.5, 18.25], [15.97, 18.47], [15.82, 18.82], [15.47, 18.97], [15.32, 19.32], [14.97, 19.47], [14.75, 20.0], [14.85, 20.25], [14.82, 20.32], [14.47, 20.47], [14.25, 21.0], [14.35, 21.25], [14.25, 21.5], [14.47, 22.03]]]]}, "2013-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 22.03], [15.0, 22.25], [15.25, 22.15], [15.5, 22.25], [16.03, 22.03], [16.25, 21.5], [16.15, 21.25], [16.18, 21.18], [16.25, 21.15], [16.5, 21.25], [16.75, 21.15], [17.0, 21.25], [17.25, 21.15], [17.5, 21.25], [18.03, 21.03], [18.25, 20.5], [18.15, 20.25], [18.25, 20.0], [18.03, 19.47], [17.68, 19.32], [17.53, 18.97], [17.18, 18.82], [17.03, 18.47], [16.5, 18.25], [15.97, 18.47], [15.82, 18.82], [15.47, 18.97], [15.32, 19.32], [14.97, 19.47], [14.75, 20.0], [14.85, 20.25], [14.82, 20.32], [14.47, 20.47], [14.25, 21.0], [14.35, 21.25], [14.25, 21.5], [14.47, 22.03]]]]}, "2013-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 22.03], [15.0, 22.25], [15.25, 22.15], [15.5, 22.25], [16.03, 22.03], [16.25, 21.5], [16.15, 21.25], [16.18, 21.18], [16.25, 21.15], [16.5, 21.25], [16.75, 21.15], [17.0, 21.25], [17.25, 21.15], [17.5, 21.25], [18.03, 21.03], [18.25, 20.5], [18.15, 20.25], [18.25, 20.0], [18.03, 19.47], [17.68, 19.32], [17.53, 18.97], [17.18, 18.82], [17.03, 18.47], [16.5, 18.25], [15.97, 18.47], [15.82, 18.82], [15.47, 18.97], [15.32, 19.32], [14.97, 19.47], [14.75, 20.0], [14.85, 20.25], [14.82, 20.32], [14.47, 20.47], [14.25, 21.0], [14.35, 21.25], [14.25, 21.5], [14.47, 22.03]]]]}, "2013-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 20.5], [14.97, 21.03], [15.5, 21.25], [15.75, 21.15], [16.0, 21.25], [16.25, 21.15], [16.5, 21.25], [16.75, 21.15], [17.0, 21.25], [17.53, 21.03], [17.75, 20.5], [17.65, 20.25], [17.75, 20.0], [17.53, 19.47], [17.0, 19.25], [16.75, 19.35], [16.68, 19.32], [16.53, 18.97], [16.0, 18.75], [15.47, 18.97], [15.25, 19.5], [15.38, 19.8], [14.97, 19.97], [14.75, 20.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.541912382731823}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2016587448007443}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.859130519651785, 28.552755660218622, 29.29684211187623, 29.729659054187266]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.89584186556226, 23.61795450493213, 23.63781711674477, 26.609083274715715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3609332386266777, -3.7060140434462436, -2.9477023393962565, -2.148212892342883]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.429820418401505, -4.541912382731823, -3.8183489830071267, -2.4879317194817645]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2573033491371146, -2.563944703777929, -2.1286435131554016, -1.5562828792096985]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7025824392030233, -3.223175379762953, -2.6980583079787537, -1.7377404425674194]}}