{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:46.698217", "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-Aug-18_to_2018-Aug-23_16.5_-9.0"}, "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": 2018080000700}, "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 18 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 23 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 54919.15717103603}, "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": ["Angola", "Congo DRC"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "W.Southern-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": -9.0}, "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": 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": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -10.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.97, -9.47], [16.32, -9.32], [16.46, -9.0], [16.25, -8.5], [16.35, -8.25], [16.25, -8.0], [16.47, -7.47], [17.0, -7.25], [17.25, -7.35], [17.5, -7.25], [17.75, -7.35], [18.0, -7.25], [18.53, -7.47], [18.75, -8.0], [18.65, -8.25], [18.75, -8.5], [18.65, -8.75], [18.75, -9.0], [18.65, -9.25], [18.75, -9.5], [18.53, -10.03], [18.18, -10.18], [18.03, -10.53], [17.68, -10.68], [17.53, -11.03], [17.0, -11.25], [16.75, -11.15], [16.5, -11.25], [15.97, -11.03], [15.75, -10.5], [15.85, -10.25], [15.75, -10.0], [15.97, -9.47]]]]}, "2018-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -9.5], [15.47, -8.97], [15.82, -8.82], [15.97, -8.47], [16.32, -8.32], [16.35, -8.25], [16.25, -8.0], [16.47, -7.47], [17.0, -7.25], [17.25, -7.35], [17.5, -7.25], [17.75, -7.35], [18.0, -7.25], [18.53, -7.47], [18.75, -8.0], [18.65, -8.25], [18.75, -8.5], [18.65, -8.75], [18.75, -9.0], [18.65, -9.25], [18.75, -9.5], [18.53, -10.03], [18.18, -10.18], [18.03, -10.53], [17.68, -10.68], [17.53, -11.03], [17.0, -11.25], [16.75, -11.15], [16.5, -11.25], [15.97, -11.03], [15.75, -10.5], [15.85, -10.25], [15.82, -10.18], [15.47, -10.03], [15.25, -9.5]]]]}, "2018-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -9.5], [15.47, -8.97], [15.82, -8.82], [15.97, -8.47], [16.32, -8.32], [16.35, -8.25], [16.25, -8.0], [16.47, -7.47], [17.0, -7.25], [17.25, -7.35], [17.5, -7.25], [17.75, -7.35], [18.0, -7.25], [18.53, -7.47], [18.75, -8.0], [18.65, -8.25], [18.75, -8.5], [18.65, -8.75], [18.75, -9.0], [18.65, -9.25], [18.75, -9.5], [18.53, -10.03], [18.18, -10.18], [18.03, -10.53], [17.68, -10.68], [17.53, -11.03], [17.0, -11.25], [16.75, -11.15], [16.5, -11.25], [15.97, -11.03], [15.75, -10.5], [15.85, -10.25], [15.82, -10.18], [15.47, -10.03], [15.25, -9.5]]]]}, "2018-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.5, -8.25], [17.03, -8.47], [17.25, -9.0], [17.03, -9.53], [16.68, -9.68], [16.53, -10.03], [16.0, -10.25], [15.47, -10.03], [15.25, -9.5], [15.47, -8.97], [15.82, -8.82], [15.97, -8.47], [16.5, -8.25]]]]}, "2018-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.5, -8.25], [17.03, -8.47], [17.25, -9.0], [17.03, -9.53], [16.68, -9.68], [16.53, -10.03], [16.0, -10.25], [15.47, -10.03], [15.25, -9.5], [15.47, -8.97], [15.82, -8.82], [15.97, -8.47], [16.5, -8.25]]]]}, "2018-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.5, -8.25], [17.03, -8.47], [17.25, -9.0], [17.03, -9.53], [16.68, -9.68], [16.53, -10.03], [16.0, -10.25], [15.47, -10.03], [15.25, -9.5], [15.47, -8.97], [15.82, -8.82], [15.97, -8.47], [16.5, -8.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.903445812454379}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3207732007370117}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.669368103541217, 23.619260863583236, 23.61400615451896, 21.380294670084936, 21.021377795184776, 21.19245032434287]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.830731828073908, 20.663082098676455, 20.501327245398556, 20.79965852113196, 20.348268889608676, 20.50613102496345]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4837009077448862, -1.2401508654989124, -1.2652919974886743, -1.065224743705528, -1.4754120784542692, -1.3431929703661751]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.903445812454379, -1.5302376072578454, -1.769478480400494, -1.0866750209454494, -1.601340499222374, -1.4818079060170248]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.016525717906953, -1.6970367302543954, -1.667515742894629, -1.4133997787765047, -1.8922072356109845, -1.7026920381375632]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5581813638340427, -2.4398976079843107, -2.1193629488190022, -1.4840041700316369, -1.9426707308046334, -1.785237555817418]}}