{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:06.741542", "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": "2010-Feb-23_to_2010-Feb-26_22.0_-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": 2010020000706}, "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 23 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 26 2010"}, "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": 77323.71274575261}, "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": 22.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -29.0], [19.47, -28.47], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.25, -28.35], [21.5, -28.25], [22.03, -28.47], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [23.03, -29.47], [23.18, -29.82], [23.53, -29.97], [23.75, -30.5], [23.53, -31.03], [23.0, -31.25], [22.75, -31.15], [22.68, -31.18], [22.65, -31.25], [22.75, -31.5], [22.53, -32.03], [22.18, -32.18], [22.03, -32.53], [21.5, -32.75], [21.25, -32.65], [21.0, -32.75], [20.47, -32.53], [20.32, -32.18], [19.97, -32.03], [19.75, -31.5], [19.85, -31.25], [19.75, -31.0], [19.85, -30.75], [19.75, -30.5], [19.85, -30.25], [19.75, -30.0], [19.85, -29.75], [19.82, -29.68], [19.47, -29.53], [19.25, -29.0]]]]}, "2010-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -29.0], [19.47, -28.47], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.25, -28.35], [21.5, -28.25], [22.03, -28.47], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [23.03, -29.47], [23.18, -29.82], [23.53, -29.97], [23.75, -30.5], [23.53, -31.03], [23.0, -31.25], [22.75, -31.15], [22.68, -31.18], [22.65, -31.25], [22.75, -31.5], [22.53, -32.03], [22.18, -32.18], [22.03, -32.53], [21.5, -32.75], [21.25, -32.65], [21.0, -32.75], [20.47, -32.53], [20.32, -32.18], [19.97, -32.03], [19.75, -31.5], [19.85, -31.25], [19.75, -31.0], [19.85, -30.75], [19.75, -30.5], [19.85, -30.25], [19.75, -30.0], [19.85, -29.75], [19.82, -29.68], [19.47, -29.53], [19.25, -29.0]]]]}, "2010-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -29.0], [19.47, -28.47], [20.0, -28.25], [20.25, -28.35], [20.5, -28.25], [20.75, -28.35], [21.0, -28.25], [21.25, -28.35], [21.5, -28.25], [22.03, -28.47], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [23.03, -29.47], [23.18, -29.82], [23.53, -29.97], [23.75, -30.5], [23.53, -31.03], [23.0, -31.25], [22.75, -31.15], [22.68, -31.18], [22.65, -31.25], [22.75, -31.5], [22.53, -32.03], [22.18, -32.18], [22.03, -32.53], [21.5, -32.75], [21.25, -32.65], [21.0, -32.75], [20.47, -32.53], [20.32, -32.18], [19.97, -32.03], [19.75, -31.5], [19.85, -31.25], [19.75, -31.0], [19.85, -30.75], [19.75, -30.5], [19.85, -30.25], [19.75, -30.0], [19.85, -29.75], [19.82, -29.68], [19.47, -29.53], [19.25, -29.0]]]]}, "2010-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.35, -30.75], [21.25, -30.5], [21.47, -29.97], [22.0, -29.75], [22.25, -29.85], [22.5, -29.75], [23.03, -29.97], [23.25, -30.5], [23.03, -31.03], [22.68, -31.18], [22.65, -31.25], [22.75, -31.5], [22.53, -32.03], [22.0, -32.25], [21.47, -32.03], [21.25, -31.5], [21.35, -31.25], [21.25, -31.0], [21.35, -30.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.526418559297895}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.879870301036039}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.608636703317075, 20.316366126824562, 20.69469721422155, 20.53486361569361]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.98946580982164, 17.47621343409122, 17.352875298759898, 19.092540925738035]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.74884772515589, -5.160286878482785, -4.8361025439956, -4.1140800282213945]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.684928228094407, -6.526418559297895, -5.44680991477702, -4.1743991783313845]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7317033410913893, -1.887737347530181, -1.7627281477709404, -1.462580821723505]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1113217808172227, -2.441251121130683, -2.013940635621618, -1.4841687288252676]}}