{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:07.281993", "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": "2018-Feb-22_to_2018-Feb-25_21.5_4.5"}, "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": 2018020000811}, "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": "February 22 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2018"}, "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": 52385.40394092671}, "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": ["Central African Republic", "Congo DRC"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": 4.5}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, 3.5], [20.47, 4.03], [20.82, 4.18], [20.85, 4.25], [20.75, 4.5], [20.97, 5.03], [21.32, 5.18], [21.35, 5.25], [21.25, 5.5], [21.47, 6.03], [22.0, 6.25], [22.25, 6.15], [22.5, 6.25], [23.03, 6.03], [23.25, 5.5], [23.15, 5.25], [23.25, 5.0], [23.15, 4.75], [23.25, 4.5], [23.03, 3.97], [22.5, 3.75], [22.25, 3.85], [22.18, 3.82], [22.15, 3.75], [22.25, 3.5], [22.15, 3.25], [22.25, 3.0], [22.03, 2.47], [21.5, 2.25], [20.97, 2.47], [20.82, 2.82], [20.47, 2.97], [20.25, 3.5]]]]}, "2018-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 3.75], [20.25, 4.0], [20.35, 4.25], [20.25, 4.5], [20.35, 4.75], [20.25, 5.0], [20.47, 5.53], [20.82, 5.68], [20.97, 6.03], [21.5, 6.25], [21.75, 6.15], [22.0, 6.25], [22.25, 6.15], [22.5, 6.25], [23.03, 6.03], [23.25, 5.5], [23.15, 5.25], [23.25, 5.0], [23.15, 4.75], [23.25, 4.5], [23.03, 3.97], [22.5, 3.75], [22.25, 3.85], [22.18, 3.82], [22.15, 3.75], [22.25, 3.5], [22.15, 3.25], [22.25, 3.0], [22.03, 2.47], [21.5, 2.25], [21.25, 2.35], [21.0, 2.25], [20.47, 2.47], [20.25, 3.0], [20.35, 3.25], [20.25, 3.5], [20.35, 3.75]]]]}, "2018-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 3.75], [20.25, 4.0], [20.35, 4.25], [20.25, 4.5], [20.35, 4.75], [20.25, 5.0], [20.47, 5.53], [20.82, 5.68], [20.97, 6.03], [21.5, 6.25], [21.75, 6.15], [22.0, 6.25], [22.25, 6.15], [22.5, 6.25], [23.03, 6.03], [23.25, 5.5], [23.15, 5.25], [23.25, 5.0], [23.15, 4.75], [23.25, 4.5], [23.03, 3.97], [22.5, 3.75], [22.25, 3.85], [22.18, 3.82], [22.15, 3.75], [22.25, 3.5], [22.15, 3.25], [22.25, 3.0], [22.03, 2.47], [21.5, 2.25], [21.25, 2.35], [21.0, 2.25], [20.47, 2.47], [20.25, 3.0], [20.35, 3.25], [20.25, 3.5], [20.35, 3.75]]]]}, "2018-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 4.75], [20.25, 5.0], [20.47, 5.53], [20.82, 5.68], [20.97, 6.03], [21.5, 6.25], [21.75, 6.15], [22.0, 6.25], [22.53, 6.03], [22.75, 5.5], [22.53, 4.97], [22.18, 4.82], [22.15, 4.75], [22.25, 4.5], [22.03, 3.97], [21.68, 3.82], [21.54, 3.5], [21.75, 3.0], [21.53, 2.47], [21.0, 2.25], [20.47, 2.47], [20.25, 3.0], [20.46, 3.5], [20.25, 4.0], [20.35, 4.25], [20.25, 4.5], [20.35, 4.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.396377594720491}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.625172111491933}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.28661721069369, 25.43382532752895, 23.79391961002375, 25.62095295594162]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.54079405439262, 24.467580443864506, 23.150668111819414, 24.431140184575384]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2130477270961766, -2.1173163676311466, -3.653063129942044, -2.0867681815337846]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.681228801786176, -2.36979328514974, -4.396377594720491, -2.368043942275108]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.439278852560756, -1.4064782946554917, -2.4252595325348065, -1.387893456915806]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7875758320565378, -1.6600382990598577, -2.6394382699556105, -1.5258284234005697]}}