{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:09.728894", "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-Jul-11_to_2025-Jul-14_11.5_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": 2025070000491}, "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": "July 11 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 14 2025"}, "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": 354843.98579683213}, "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": ["Cameroon", "Chad", "Mali", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara", "Western-Africa"]}, "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": 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": 11.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.35, 15.25], [10.25, 15.5], [10.47, 16.03], [10.82, 16.18], [10.85, 16.25], [10.75, 16.5], [10.97, 17.03], [11.5, 17.25], [11.75, 17.15], [12.0, 17.25], [12.25, 17.15], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.25, 16.65], [13.5, 16.75], [14.03, 16.53], [14.25, 16.0], [14.15, 15.75], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [14.75, 15.65], [14.82, 15.68], [14.97, 16.03], [15.5, 16.25], [15.75, 16.15], [16.0, 16.25], [16.53, 16.03], [16.75, 15.5], [16.65, 15.25], [16.75, 15.0], [16.53, 14.47], [16.0, 14.25], [15.75, 14.35], [15.68, 14.32], [15.53, 13.97], [15.18, 13.82], [15.04, 13.5], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.82, 12.82], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.82, 13.32], [12.75, 13.35], [12.5, 13.25], [12.25, 13.35], [12.0, 13.25], [11.75, 13.35], [11.5, 13.25], [10.97, 13.47], [10.82, 13.82], [10.47, 13.97], [10.25, 14.5], [10.35, 14.75], [10.25, 15.0], [10.35, 15.25]]]]}, "2025-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.32, 17.18], [3.47, 17.53], [4.0, 17.75], [4.25, 17.65], [4.32, 17.68], [4.47, 18.03], [5.0, 18.25], [5.25, 18.15], [5.32, 18.18], [5.47, 18.53], [6.0, 18.75], [6.53, 18.53], [6.75, 18.0], [6.65, 17.75], [6.75, 17.5], [6.65, 17.25], [6.68, 17.18], [6.75, 17.15], [6.82, 17.18], [6.97, 17.53], [7.5, 17.75], [7.75, 17.65], [8.0, 17.75], [8.53, 17.53], [8.75, 17.0], [8.53, 16.47], [8.18, 16.32], [8.15, 16.25], [8.18, 16.18], [8.25, 16.15], [8.5, 16.25], [8.75, 16.15], [8.82, 16.18], [8.97, 16.53], [9.5, 16.75], [10.03, 16.53], [10.2, 16.13], [10.5, 16.25], [10.75, 16.15], [10.82, 16.18], [10.85, 16.25], [10.75, 16.5], [10.97, 17.03], [11.5, 17.25], [11.75, 17.15], [12.0, 17.25], [12.25, 17.15], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.25, 16.65], [13.5, 16.75], [14.03, 16.53], [14.25, 16.0], [14.15, 15.75], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [14.75, 15.65], [14.82, 15.68], [14.97, 16.03], [15.5, 16.25], [15.75, 16.15], [16.0, 16.25], [16.53, 16.03], [16.75, 15.5], [16.65, 15.25], [16.75, 15.0], [16.53, 14.47], [16.0, 14.25], [15.75, 14.35], [15.68, 14.32], [15.53, 13.97], [15.18, 13.82], [15.04, 13.5], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.82, 12.82], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.82, 13.32], [12.75, 13.35], [12.5, 13.25], [12.25, 13.35], [12.0, 13.25], [11.75, 13.35], [11.5, 13.25], [10.97, 13.47], [10.82, 13.82], [10.75, 13.85], [10.5, 13.75], [10.25, 13.85], [10.18, 13.82], [10.03, 13.47], [9.5, 13.25], [9.25, 13.35], [9.18, 13.32], [9.03, 12.97], [8.5, 12.75], [8.25, 12.85], [8.0, 12.75], [7.75, 12.85], [7.5, 12.75], [7.25, 12.85], [7.0, 12.75], [6.75, 12.85], [6.5, 12.75], [5.97, 12.97], [5.75, 13.5], [5.85, 13.75], [5.82, 13.82], [5.75, 13.85], [5.5, 13.75], [5.25, 13.85], [5.0, 13.75], [4.75, 13.85], [4.5, 13.75], [3.97, 13.97], [3.75, 14.5], [3.88, 14.8], [3.47, 14.97], [3.32, 15.32], [3.25, 15.35], [3.0, 15.25], [2.47, 15.47], [2.25, 16.0], [2.47, 16.53], [2.82, 16.68], [2.97, 17.03], [3.32, 17.18]]]]}, "2025-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.32, 17.18], [3.47, 17.53], [4.0, 17.75], [4.25, 17.65], [4.32, 17.68], [4.47, 18.03], [5.0, 18.25], [5.25, 18.15], [5.32, 18.18], [5.47, 18.53], [6.0, 18.75], [6.53, 18.53], [6.75, 18.0], [6.65, 17.75], [6.75, 17.5], [6.65, 17.25], [6.68, 17.18], [6.75, 17.15], [6.82, 17.18], [6.97, 17.53], [7.5, 17.75], [7.75, 17.65], [8.0, 17.75], [8.53, 17.53], [8.75, 17.0], [8.53, 16.47], [8.18, 16.32], [8.15, 16.25], [8.18, 16.18], [8.25, 16.15], [8.5, 16.25], [8.75, 16.15], [8.82, 16.18], [8.97, 16.53], [9.5, 16.75], [10.03, 16.53], [10.2, 16.13], [10.5, 16.25], [10.75, 16.15], [10.82, 16.18], [10.85, 16.25], [10.75, 16.5], [10.97, 17.03], [11.5, 17.25], [11.75, 17.15], [12.0, 17.25], [12.25, 17.15], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.25, 16.65], [13.5, 16.75], [14.03, 16.53], [14.25, 16.0], [14.15, 15.75], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [14.75, 15.65], [14.82, 15.68], [14.97, 16.03], [15.5, 16.25], [15.75, 16.15], [16.0, 16.25], [16.53, 16.03], [16.75, 15.5], [16.65, 15.25], [16.75, 15.0], [16.53, 14.47], [16.0, 14.25], [15.75, 14.35], [15.68, 14.32], [15.53, 13.97], [15.18, 13.82], [15.04, 13.5], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.82, 12.82], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.82, 13.32], [12.75, 13.35], [12.5, 13.25], [12.25, 13.35], [12.0, 13.25], [11.75, 13.35], [11.5, 13.25], [10.97, 13.47], [10.82, 13.82], [10.75, 13.85], [10.5, 13.75], [10.25, 13.85], [10.18, 13.82], [10.03, 13.47], [9.5, 13.25], [9.25, 13.35], [9.18, 13.32], [9.03, 12.97], [8.5, 12.75], [8.25, 12.85], [8.0, 12.75], [7.75, 12.85], [7.5, 12.75], [7.25, 12.85], [7.0, 12.75], [6.75, 12.85], [6.5, 12.75], [5.97, 12.97], [5.75, 13.5], [5.85, 13.75], [5.82, 13.82], [5.75, 13.85], [5.5, 13.75], [5.25, 13.85], [5.0, 13.75], [4.75, 13.85], [4.5, 13.75], [3.97, 13.97], [3.75, 14.5], [3.88, 14.8], [3.47, 14.97], [3.32, 15.32], [3.25, 15.35], [3.0, 15.25], [2.47, 15.47], [2.25, 16.0], [2.47, 16.53], [2.82, 16.68], [2.97, 17.03], [3.32, 17.18]]]]}, "2025-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.32, 17.18], [3.47, 17.53], [4.0, 17.75], [4.25, 17.65], [4.32, 17.68], [4.47, 18.03], [5.0, 18.25], [5.25, 18.15], [5.32, 18.18], [5.47, 18.53], [6.0, 18.75], [6.53, 18.53], [6.75, 18.0], [6.65, 17.75], [6.75, 17.5], [6.65, 17.25], [6.68, 17.18], [6.75, 17.15], [6.82, 17.18], [6.97, 17.53], [7.5, 17.75], [7.75, 17.65], [8.0, 17.75], [8.53, 17.53], [8.75, 17.0], [8.53, 16.47], [8.18, 16.32], [8.15, 16.25], [8.18, 16.18], [8.25, 16.15], [8.5, 16.25], [8.75, 16.15], [8.82, 16.18], [8.97, 16.53], [9.5, 16.75], [10.03, 16.53], [10.2, 16.13], [10.5, 16.25], [11.03, 16.03], [11.2, 15.63], [11.5, 15.75], [12.03, 15.53], [12.25, 15.0], [12.15, 14.75], [12.25, 14.5], [12.03, 13.97], [11.5, 13.75], [11.0, 13.96], [10.5, 13.75], [10.25, 13.85], [10.18, 13.82], [10.03, 13.47], [9.5, 13.25], [9.25, 13.35], [9.18, 13.32], [9.03, 12.97], [8.5, 12.75], [8.25, 12.85], [8.0, 12.75], [7.75, 12.85], [7.5, 12.75], [7.25, 12.85], [7.0, 12.75], [6.75, 12.85], [6.5, 12.75], [5.97, 12.97], [5.75, 13.5], [5.85, 13.75], [5.82, 13.82], [5.75, 13.85], [5.5, 13.75], [5.25, 13.85], [5.0, 13.75], [4.75, 13.85], [4.5, 13.75], [3.97, 13.97], [3.75, 14.5], [3.88, 14.8], [3.47, 14.97], [3.32, 15.32], [3.25, 15.35], [3.0, 15.25], [2.47, 15.47], [2.25, 16.0], [2.47, 16.53], [2.82, 16.68], [2.97, 17.03], [3.32, 17.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.219165015328315}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.358957875052549}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.262719811333568, 28.06614880388196, 27.835031117244284, 28.647952752364347]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.26676712036135, 24.084408060709677, 25.04758733113607, 26.123142496744833]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.708155239237816, -3.49916294821887, -3.614073413291862, -2.5332074257682446]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.219165015328315, -5.548251096913702, -5.559234441857427, -3.7271558401461675]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.4987446261419977, -2.346472185384423, -2.3619346556803684, -1.6119331827995134]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.6394329238896015, -3.855718122939607, -3.296510132045043, -2.15799121131734]}}