{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:07.802368", "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-24_to_2018-Feb-26_21.5_-30.5"}, "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": 2018020000904}, "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 24 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 26 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 53209.25043391805}, "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": ["South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -30.5}, "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": 24.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.32, -29.32], [21.47, -28.97], [22.0, -28.75], [22.25, -28.85], [22.5, -28.75], [23.03, -28.97], [23.18, -29.32], [23.53, -29.47], [23.68, -29.82], [24.03, -29.97], [24.25, -30.5], [24.15, -30.75], [24.18, -30.82], [24.53, -30.97], [24.75, -31.5], [24.53, -32.03], [24.0, -32.25], [23.75, -32.15], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.5, -32.04], [22.0, -32.25], [21.47, -32.03], [21.25, -31.5], [21.35, -31.25], [21.32, -31.18], [21.25, -31.15], [21.0, -31.25], [20.47, -31.03], [20.25, -30.5], [20.47, -29.97], [20.82, -29.82], [20.97, -29.47], [21.32, -29.32]]]]}, "2018-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.32, -29.32], [21.47, -28.97], [22.0, -28.75], [22.25, -28.85], [22.5, -28.75], [23.03, -28.97], [23.18, -29.32], [23.53, -29.47], [23.68, -29.82], [24.03, -29.97], [24.25, -30.5], [24.15, -30.75], [24.18, -30.82], [24.53, -30.97], [24.75, -31.5], [24.53, -32.03], [24.0, -32.25], [23.75, -32.15], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.5, -32.04], [22.0, -32.25], [21.47, -32.03], [21.25, -31.5], [21.35, -31.25], [21.32, -31.18], [21.25, -31.15], [21.0, -31.25], [20.47, -31.03], [20.25, -30.5], [20.47, -29.97], [20.82, -29.82], [20.97, -29.47], [21.32, -29.32]]]]}, "2018-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.32, -29.32], [21.47, -28.97], [22.0, -28.75], [22.25, -28.85], [22.5, -28.75], [23.03, -28.97], [23.18, -29.32], [23.53, -29.47], [23.68, -29.82], [24.03, -29.97], [24.25, -30.5], [24.15, -30.75], [24.18, -30.82], [24.53, -30.97], [24.75, -31.5], [24.53, -32.03], [24.0, -32.25], [23.75, -32.15], [23.5, -32.25], [23.25, -32.15], [23.0, -32.25], [22.5, -32.04], [22.0, -32.25], [21.47, -32.03], [21.25, -31.5], [21.35, -31.25], [21.32, -31.18], [21.25, -31.15], [21.0, -31.25], [20.47, -31.03], [20.25, -30.5], [20.47, -29.97], [20.82, -29.82], [20.97, -29.47], [21.32, -29.32]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.290744165004924}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.785335999822991}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.667908650312256, 16.613452141313473, 20.453296165579275]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.284585786938976, 11.818813367120129, 16.617069519886456]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.005294193893173, -8.12134869501602, -4.229365110559783]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.3001684629441, -9.290744165004924, -4.74047285475956]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8779426087963813, -3.0628764168106657, -1.556764770342921]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.0061275396211142, -3.5643284991235413, -1.8240189300280343]}}