{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:26.063721", "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": "2017-Jul-08_to_2017-Jul-12_22.5_17.0"}, "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": 2017070000291}, "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 08 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 89138.30736120907}, "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": 17.0}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, 15.53], [22.5, 15.75], [22.75, 15.65], [23.0, 15.75], 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[21.5, 18.25]]], [[[18.75, 16.0], [18.97, 16.53], [19.5, 16.75], [19.75, 16.65], [20.0, 16.75], [20.53, 16.53], [20.75, 16.0], [20.53, 15.47], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.75, 16.0]]]]}, "2017-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 17.03], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.5, 17.25], [20.75, 17.15], [20.82, 17.18], [20.85, 17.25], [20.75, 17.5], [20.97, 18.03], [21.5, 18.25], [22.03, 18.03], [22.18, 17.68], [22.25, 17.65], [22.5, 17.75], [22.75, 17.65], [23.0, 17.75], [23.53, 17.53], [23.68, 17.18], [24.03, 17.03], [24.25, 16.5], [24.15, 16.25], [24.25, 16.0], [24.13, 15.7], [24.53, 15.53], [24.75, 15.0], [24.53, 14.47], [24.0, 14.25], [23.75, 14.35], [23.68, 14.32], [23.53, 13.97], [23.18, 13.82], [23.03, 13.47], [22.5, 13.25], [21.97, 13.47], [21.75, 14.0], [21.88, 14.3], [21.47, 14.47], [21.25, 15.0], [21.35, 15.25], [21.25, 15.5], [21.35, 15.75], [21.3, 15.88], [21.18, 15.82], [21.03, 15.47], [20.5, 15.25], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.75, 16.0], [18.85, 16.25], [18.75, 16.5], [18.97, 17.03]]]]}, "2017-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 17.03], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.5, 17.25], [20.75, 17.15], [20.82, 17.18], [20.85, 17.25], [20.75, 17.5], [20.97, 18.03], [21.5, 18.25], [22.03, 18.03], [22.18, 17.68], [22.25, 17.65], [22.5, 17.75], [22.75, 17.65], [23.0, 17.75], [23.53, 17.53], [23.68, 17.18], [24.03, 17.03], [24.25, 16.5], [24.15, 16.25], [24.25, 16.0], [24.03, 15.47], [23.68, 15.32], [23.53, 14.97], [23.18, 14.82], [23.03, 14.47], [22.5, 14.25], [22.25, 14.35], [22.0, 14.25], [21.47, 14.47], [21.25, 15.0], [21.35, 15.25], [21.25, 15.5], [21.35, 15.75], [21.3, 15.88], [21.18, 15.82], [21.03, 15.47], [20.5, 15.25], [20.25, 15.35], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.75, 16.0], [18.85, 16.25], [18.75, 16.5], [18.97, 17.03]]]]}, "2017-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 16.5], [18.97, 17.03], [19.5, 17.25], [19.75, 17.15], [20.0, 17.25], [20.25, 17.15], [20.5, 17.25], [20.75, 17.15], [21.0, 17.25], [21.5, 17.04], [21.82, 17.18], [21.97, 17.53], [22.5, 17.75], [23.03, 17.53], [23.25, 17.0], [23.03, 16.47], [22.68, 16.32], [22.65, 16.25], [22.75, 16.0], [22.53, 15.47], [22.0, 15.25], [21.47, 15.47], [21.3, 15.88], [21.18, 15.82], [21.03, 15.47], [20.5, 15.25], [20.25, 15.35], [20.0, 15.25], [19.47, 15.47], [19.32, 15.82], [18.97, 15.97], [18.75, 16.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.0165552209167}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.941452751818291}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.685874931418823, 27.061589376907193, 27.316434173329583, 26.70059060227993, 29.51450920884332]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.876667241529333, 23.796680420531004, 23.613997586452683, 23.57715823040934, 25.597939893192006]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4561269962928427, -2.611518305284892, -2.781579743107515, -3.817289170256349, -2.2815189181360123]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7779324960461054, -4.1004164951923485, -3.9817698971342566, -5.0165552209167, -2.731747430636517]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5297054382378474, -1.7322846015407987, -1.8104711749872426, -2.467000096066181, -1.4757335358234047]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7434715978380482, -2.497988206811479, -2.4928740661048083, -3.679841608808094, -1.9223939402364898]}}