{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:42.080766", "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": "2012-Jun-25_to_2012-Jul-07_23.0_14.0"}, "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": 2012060001299}, "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": "June 25 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 07 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 13}, "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": 71673.24243558219}, "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", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "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": 14.0}, "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": 23.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-06-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, 15.53], [23.5, 15.75], [23.75, 15.65], [24.0, 15.75], [24.53, 15.53], [24.75, 15.0], [24.53, 14.47], [24.18, 14.32], [24.03, 13.97], [23.5, 13.75], [22.97, 13.97], [22.75, 14.5], [22.85, 14.75], [22.75, 15.0], [22.97, 15.53]]]]}, "2012-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.35, 14.75], [22.25, 15.0], [22.47, 15.53], [23.0, 15.75], [23.25, 15.65], [23.5, 15.75], [23.75, 15.65], [24.0, 15.75], [24.53, 15.53], [24.75, 15.0], [24.53, 14.47], [24.18, 14.32], [24.15, 14.25], [24.25, 14.0], [24.03, 13.47], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.47, 13.47], [22.25, 14.0], [22.35, 14.25], [22.25, 14.5], [22.35, 14.75]]]]}, "2012-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, 14.5], [21.97, 15.03], [22.32, 15.18], [22.47, 15.53], [23.0, 15.75], [23.25, 15.65], [23.5, 15.75], [23.75, 15.65], [24.0, 15.75], [24.53, 15.53], [24.75, 15.0], [24.53, 14.47], [24.18, 14.32], [24.15, 14.25], [24.25, 14.0], [24.03, 13.47], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.47, 13.47], [22.32, 13.82], [21.97, 13.97], [21.75, 14.5]]]]}, "2012-06-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, 14.5], [21.97, 15.03], [22.32, 15.18], [22.47, 15.53], [23.0, 15.75], [23.25, 15.65], [23.5, 15.75], [24.03, 15.53], [24.25, 15.0], [24.15, 14.75], [24.25, 14.5], [24.15, 14.25], [24.25, 14.0], [24.03, 13.47], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.47, 13.47], [22.32, 13.82], [21.97, 13.97], [21.75, 14.5]]]]}, "2012-06-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, 14.5], [21.97, 15.03], [22.5, 15.25], [22.75, 15.15], [23.0, 15.25], [23.25, 15.15], [23.5, 15.25], [24.03, 15.03], [24.25, 14.5], [24.15, 14.25], [24.18, 14.18], [24.25, 14.15], [24.5, 14.25], [25.03, 14.03], [25.25, 13.5], [25.03, 12.97], [24.5, 12.75], [24.25, 12.85], [24.0, 12.75], [23.75, 12.85], [23.5, 12.75], [22.97, 12.97], [22.82, 13.32], [22.47, 13.47], [22.32, 13.82], [21.97, 13.97], [21.75, 14.5]]]]}, "2012-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.43, 14.93], [22.0, 14.75], [21.47, 14.97], [21.25, 15.5], [21.47, 16.03], [22.0, 16.25], [22.53, 16.03], [22.75, 15.5], [22.57, 15.07], [23.0, 15.25], [23.25, 15.15], [23.5, 15.25], [24.03, 15.03], [24.25, 14.5], [24.15, 14.25], [24.18, 14.18], [24.25, 14.15], [24.5, 14.25], [25.03, 14.03], [25.25, 13.5], [25.03, 12.97], [24.5, 12.75], [24.25, 12.85], [24.0, 12.75], [23.75, 12.85], [23.5, 12.75], [22.97, 12.97], [22.82, 13.32], [22.47, 13.47], [22.25, 14.0], [22.35, 14.25], [22.25, 14.5], [22.43, 14.93]]]]}, "2012-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 16.03], [22.0, 16.25], [22.53, 16.03], [22.68, 15.68], [23.03, 15.53], [23.25, 15.0], [23.15, 14.75], [23.18, 14.68], [23.25, 14.65], [23.5, 14.75], [24.03, 14.53], [24.18, 14.18], [24.25, 14.15], [24.5, 14.25], [24.75, 14.15], [25.0, 14.25], [25.25, 14.15], [25.5, 14.25], [26.03, 14.03], [26.25, 13.5], [26.03, 12.97], [25.5, 12.75], [25.25, 12.85], [25.0, 12.75], [24.75, 12.85], [24.5, 12.75], [24.25, 12.85], [24.0, 12.75], [23.75, 12.85], [23.5, 12.75], [22.97, 12.97], [22.82, 13.32], [22.47, 13.47], [22.32, 13.82], [21.97, 13.97], [21.82, 14.32], [21.47, 14.47], [21.25, 15.0], [21.35, 15.25], [21.25, 15.5], [21.47, 16.03]]]]}, "2012-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.25, 14.15], [25.5, 14.25], [26.03, 14.03], [26.25, 13.5], [26.03, 12.97], [25.5, 12.75], [25.25, 12.85], [25.0, 12.75], [24.47, 12.97], [24.25, 13.5], [24.47, 14.03], [25.0, 14.25], [25.25, 14.15]]], [[[21.5, 16.75], [22.03, 16.53], [22.18, 16.18], [22.53, 16.03], [22.68, 15.68], [22.75, 15.65], [23.0, 15.75], [23.53, 15.53], [23.68, 15.18], [24.03, 15.03], [24.25, 14.5], [24.15, 14.25], [24.25, 14.0], [24.15, 13.75], [24.25, 13.5], [24.03, 12.97], [23.5, 12.75], [22.97, 12.97], [22.82, 13.32], [22.47, 13.47], [22.32, 13.82], [22.25, 13.85], [22.0, 13.75], [21.47, 13.97], [21.25, 14.5], [21.35, 14.75], [21.32, 14.82], [20.97, 14.97], [20.75, 15.5], [20.85, 15.75], [20.75, 16.0], [20.97, 16.53], [21.5, 16.75]]]]}, "2012-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, 13.5], [24.47, 14.03], [25.0, 14.25], [25.25, 14.15], [25.5, 14.25], [26.03, 14.03], [26.25, 13.5], [26.03, 12.97], [25.5, 12.75], [25.25, 12.85], [25.0, 12.75], [24.47, 12.97], [24.25, 13.5]]], [[[21.5, 16.75], [22.03, 16.53], [22.18, 16.18], [22.53, 16.03], [22.68, 15.68], [22.75, 15.65], [23.0, 15.75], [23.53, 15.53], [23.68, 15.18], [24.03, 15.03], [24.25, 14.5], [24.15, 14.25], [24.25, 14.0], [24.03, 13.47], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.47, 13.47], [22.32, 13.82], [22.25, 13.85], [22.0, 13.75], [21.47, 13.97], [21.25, 14.5], [21.35, 14.75], [21.32, 14.82], [20.97, 14.97], [20.75, 15.5], [20.85, 15.75], [20.75, 16.0], [20.97, 16.53], [21.5, 16.75]]]]}, "2012-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, 16.53], [21.38, 16.7], [21.25, 17.0], [21.47, 17.53], [22.0, 17.75], [22.25, 17.65], [22.5, 17.75], [23.03, 17.53], [23.25, 17.0], [23.15, 16.75], [23.18, 16.68], [23.53, 16.53], [23.75, 16.0], [23.54, 15.5], [23.68, 15.18], [24.03, 15.03], [24.25, 14.5], [24.15, 14.25], [24.25, 14.0], [24.03, 13.47], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.47, 13.47], [22.32, 13.82], [22.25, 13.85], [22.0, 13.75], [21.47, 13.97], [21.25, 14.5], [21.35, 14.75], [21.32, 14.82], [20.97, 14.97], [20.75, 15.5], [20.85, 15.75], [20.75, 16.0], [20.97, 16.53]]]]}, "2012-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, 16.53], [21.38, 16.7], [21.25, 17.0], [21.47, 17.53], [22.0, 17.75], [22.25, 17.65], [22.5, 17.75], [23.03, 17.53], [23.25, 17.0], [23.15, 16.75], [23.18, 16.68], [23.53, 16.53], [23.75, 16.0], [23.54, 15.5], [23.75, 15.0], [23.65, 14.75], [23.75, 14.5], [23.65, 14.25], [23.75, 14.0], [23.53, 13.47], [23.0, 13.25], [22.47, 13.47], [22.32, 13.82], [22.25, 13.85], [22.0, 13.75], [21.47, 13.97], [21.25, 14.5], [21.35, 14.75], [21.32, 14.82], [20.97, 14.97], [20.75, 15.5], [20.85, 15.75], [20.75, 16.0], [20.97, 16.53]]]]}, "2012-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, 17.0], [21.47, 17.53], [22.0, 17.75], [22.25, 17.65], [22.5, 17.75], [23.03, 17.53], [23.25, 17.0], [23.15, 16.75], [23.18, 16.68], [23.53, 16.53], [23.75, 16.0], [23.53, 15.47], [23.0, 15.25], [22.75, 15.35], [22.5, 15.25], [21.97, 15.47], [21.75, 16.0], [21.85, 16.25], [21.82, 16.32], [21.47, 16.47], [21.25, 17.0]]]]}, "2012-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, 17.0], [21.47, 17.53], [22.0, 17.75], [22.25, 17.65], [22.5, 17.75], [23.03, 17.53], [23.25, 17.0], [23.04, 16.5], [23.25, 16.0], [23.03, 15.47], [22.5, 15.25], [21.97, 15.47], [21.75, 16.0], [21.88, 16.3], [21.47, 16.47], [21.25, 17.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.135898076712067}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.441726711510033}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.302086817323584, 26.82523446870863, 26.70702598344576, 26.708346839744138, 24.3861880734745, 25.516503067910946, 25.839155542461583, 26.571668713578163, 26.812928957551378, 26.455371332944026, 26.874358737219893, 27.990432027789893, 27.68665182266784]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.8888846213722, 25.94954973377736, 25.51736436702356, 25.64703658040611, 22.21802840257959, 23.61785737956808, 23.245553406989075, 24.156876988269573, 24.554282206050345, 23.485563673535637, 24.00305919501801, 27.130602487373096, 26.575887488786236]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1387550742149415, -2.287378964976491, -2.29534956597211, -2.2136725923707314, -3.318936214551549, -2.298416864450779, -2.3552232272700477, -2.472911477509164, -2.328391254257931, -2.787831194988896, -2.3926934931003605, -1.8469881715259817, -2.0355353392258544]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3068614471653177, -2.775534287844323, -2.8621587198063594, -2.5989990608235303, -4.135898076712067, -2.627466087418213, -2.6634212043540515, -3.078532809044191, -2.897907350483081, -3.431908262450577, -2.7566068420878764, -2.208085847973507, -2.197556531103146]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9629126771072825, -1.9111959960947937, -1.858373748054703, -1.723966493165259, -2.17774023227261, -1.5217579589990469, -1.5689550210000172, -1.722651478535348, -1.5869502718841009, -1.90476541398255, -1.6144443184130153, -1.2726786100919658, -1.2812963372190431]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.216239077532626, -2.3176412736714362, -2.2280325502823195, -1.9641707816256229, -2.644232315298215, -1.6679400137960214, -1.8060893041134367, -2.038443332586942, -2.0158343392311338, -2.4889335254820395, -1.8633912799417998, -1.4912123380770683, -1.3536657210813103]}}