{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:10.907047", "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": "2021-Apr-17_to_2021-Apr-20_39.0_-6.5"}, "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": 2021040000724}, "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": "April 17 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2021"}, "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": 159193.28606539097}, "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": ["Tanzania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-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": ["Indian Ocean"]}, "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": -6.5}, "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": 39.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 44.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -10.25}, "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": {"2021-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.75, -8.0], [42.88, -7.7], [42.47, -7.53], [42.25, -7.0], [42.47, -6.47], [43.0, -6.25], [43.53, -6.47], [43.75, -7.0], [43.63, -7.3], [44.03, -7.47], [44.18, -7.82], [44.53, -7.97], [44.75, -8.5], [44.65, -8.75], [44.75, -9.0], [44.53, -9.53], [44.0, -9.75], [43.75, -9.65], [43.5, -9.75], [42.97, -9.53], [42.75, -9.0], [42.85, -8.75], [42.75, -8.5], [42.85, -8.25], [42.75, -8.0]]], [[[40.47, -7.03], [40.25, -6.5], [40.47, -5.97], [41.0, -5.75], [41.53, -5.97], [41.75, -6.5], [41.53, -7.03], [41.0, -7.25], [40.47, -7.03]]]]}, "2021-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, -7.5], [37.47, -6.97], [37.82, -6.82], [37.85, -6.75], [37.75, -6.5], [37.97, -5.97], [38.5, -5.75], [38.75, -5.85], [38.82, -5.82], [38.97, -5.47], [39.5, -5.25], [40.03, -5.47], [40.18, -5.82], [40.5, -5.96], [41.0, -5.75], [41.53, -5.97], [41.68, -6.32], [41.75, -6.35], [42.0, -6.25], [42.25, -6.35], [42.5, -6.25], [42.75, -6.35], [43.0, -6.25], [43.53, -6.47], [43.68, -6.82], [43.75, -6.85], [44.0, -6.75], [44.53, -6.97], [44.75, -7.5], [44.65, -7.75], [44.75, -8.0], [44.65, -8.25], [44.75, -8.5], [44.65, -8.75], [44.75, -9.0], [44.53, -9.53], [44.18, -9.68], [44.03, -10.03], [43.68, -10.18], [43.53, -10.53], [43.0, -10.75], [42.75, -10.65], [42.5, -10.75], [41.97, -10.53], [41.82, -10.18], [41.47, -10.03], [41.25, -9.5], [41.35, -9.25], [41.32, -9.18], [40.97, -9.03], [40.82, -8.68], [40.47, -8.53], [40.32, -8.18], [39.97, -8.03], [39.8, -7.62], [39.68, -7.68], [39.65, -7.75], [39.75, -8.0], [39.53, -8.53], [39.0, -8.75], [38.75, -8.65], [38.5, -8.75], [37.97, -8.53], [37.82, -8.18], [37.47, -8.03], [37.25, -7.5]]]]}, "2021-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, -7.5], [37.47, -6.97], [37.82, -6.82], [37.85, -6.75], [37.75, -6.5], [37.97, -5.97], [38.5, -5.75], [38.75, -5.85], [38.82, -5.82], [38.97, -5.47], [39.5, -5.25], [40.03, -5.47], [40.18, -5.82], [40.5, -5.96], [41.0, -5.75], [41.53, -5.97], [41.68, -6.32], [41.75, -6.35], [42.0, -6.25], [42.25, -6.35], [42.5, 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duration", "value": -2.397579147287786}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2170082204322514}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.41944359858377, 25.735861634433206, 25.563273564207464, 25.66103899397359]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.262742134598284, 23.638321167957827, 23.22681554743741, 23.434307767139956]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8732372413855387, -1.1813110965812257, -1.3252116483897702, -1.189172894713667]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9230223626627776, -1.676158762869477, -2.318038104758216, -2.397579147287786]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3279641137806368, -1.6459456244650308, -1.822125169057884, -1.612208419837362]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4062485761740318, -2.006571636712387, -2.717324700950204, -2.814558473699023]}}