{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.473142", "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": "2011-Dec-29_to_2012-Jan-04_36.0_-0.5"}, "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": 2011120001453}, "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": "December 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 04 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 55634.105601942036}, "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": ["Kenya"]}, "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": []}, "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": -0.5}, "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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 1.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, -0.53], [35.75, 0.0], [35.97, 0.53], [36.5, 0.75], [36.75, 0.65], [37.0, 0.75], [37.25, 0.65], [37.5, 0.75], [38.03, 0.53], [38.25, 0.0], [38.03, -0.53], [37.5, -0.75], [37.25, -0.65], [37.0, -0.75], [36.75, -0.65], [36.5, -0.75], [35.97, -0.53]]]]}, "2011-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.47, 0.97], [34.25, 1.5], [34.47, 2.03], [35.0, 2.25], [35.25, 2.15], [35.5, 2.25], [36.03, 2.03], [36.25, 1.5], [36.07, 1.07], [36.5, 1.25], [37.03, 1.03], [37.18, 0.68], [37.25, 0.65], [37.5, 0.75], [38.03, 0.53], [38.25, 0.0], [38.03, -0.53], [37.5, -0.75], [37.25, -0.65], [37.18, -0.68], [37.15, -0.75], [37.25, -1.0], [37.03, -1.53], [36.5, -1.75], [35.97, -1.53], [35.82, -1.18], [35.47, -1.03], [35.25, -0.5], [35.47, 0.03], [35.82, 0.18], [35.85, 0.25], [35.75, 0.5], [35.93, 0.93], [35.5, 0.75], [35.25, 0.85], [35.0, 0.75], [34.47, 0.97]]]]}, "2011-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.47, 2.03], [35.0, 2.25], [35.25, 2.15], [35.5, 2.25], [36.03, 2.03], [36.18, 1.68], [36.53, 1.53], [36.68, 1.18], [37.03, 1.03], [37.18, 0.68], [37.25, 0.65], [37.5, 0.75], [38.03, 0.53], [38.25, 0.0], [38.03, -0.53], [37.5, -0.75], [37.25, -0.65], [37.18, -0.68], [37.15, -0.75], [37.25, -1.0], [37.03, -1.53], [36.5, -1.75], [35.97, -1.53], [35.82, -1.18], [35.47, -1.03], [35.25, -0.5], [35.47, 0.03], [35.82, 0.18], [35.85, 0.25], [35.82, 0.32], [35.5, 0.46], [35.0, 0.25], [34.47, 0.47], [34.25, 1.0], [34.35, 1.25], [34.25, 1.5], [34.47, 2.03]]]]}, "2012-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 1.25], [34.25, 1.5], [34.47, 2.03], [35.0, 2.25], [35.25, 2.15], [35.5, 2.25], [36.03, 2.03], [36.18, 1.68], [36.53, 1.53], [36.68, 1.18], [36.75, 1.15], [37.0, 1.25], [37.53, 1.03], [37.68, 0.68], [38.03, 0.53], [38.25, 0.0], [38.03, -0.53], [37.5, -0.75], [37.25, -0.65], [37.18, -0.68], [37.15, -0.75], [37.25, -1.0], [37.03, -1.53], [36.5, -1.75], [35.97, -1.53], [35.82, -1.18], [35.75, -1.15], [35.68, -1.18], [35.53, -1.53], [35.0, -1.75], [34.47, -1.53], [34.25, -1.0], [34.47, -0.47], [34.82, -0.32], [34.88, -0.2], [34.47, -0.03], [34.25, 0.5], [34.35, 0.75], [34.25, 1.0], [34.35, 1.25]]]]}, "2012-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 1.25], [34.25, 1.5], [34.47, 2.03], [35.0, 2.25], [35.25, 2.15], [35.5, 2.25], [36.03, 2.03], [36.18, 1.68], [36.53, 1.53], [36.68, 1.18], [36.75, 1.15], [37.0, 1.25], [37.53, 1.03], [37.68, 0.68], [38.03, 0.53], [38.25, 0.0], [38.03, -0.53], [37.5, -0.75], [37.25, -0.65], [37.18, -0.68], [37.15, -0.75], [37.25, -1.0], [37.03, -1.53], [36.5, -1.75], [35.97, -1.53], [35.82, -1.18], [35.75, -1.15], [35.68, -1.18], [35.53, -1.53], [35.0, -1.75], [34.47, -1.53], [34.25, -1.0], [34.47, -0.47], [34.82, -0.32], [34.88, -0.2], [34.47, -0.03], [34.25, 0.5], [34.35, 0.75], [34.25, 1.0], [34.35, 1.25]]]]}, "2012-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 1.25], [34.25, 1.5], [34.47, 2.03], [35.0, 2.25], [35.25, 2.15], [35.5, 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7036532968852491}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.649514716359306, 16.06385229776447, 17.19938390189725, 17.071956590278774, 16.836460100409, 17.859812407817913, 19.6917402478731]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.427584974272179, 12.300899079061594, 12.74951911273422, 12.134063193853137, 11.569063000325912, 12.750068958437339, 15.339936913949657]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9688287008310302, -1.5420834214088979, -1.3007854346256367, -1.8700920848371885, -2.1509853180630976, -1.5487962682964318, -1.5766793002455757]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0570638707672515, -2.1789689484065775, -1.7303850911747531, -2.8275184405721348, -3.056125972049358, -2.5836923638044027, -1.9585851202454023]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5180020559391008, -2.116117273802071, -1.6150986417505755, -2.1336056149614686, -2.4941408971867873, -1.7240504059386665, -1.5832840748427945]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6810261855451045, -2.99202955471471, -2.1302140241621736, -2.9894864136116888, -3.941207785322784, -2.337688749901655, -1.8888314857468675]}}