{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:57.847538", "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-Mar-19_to_2011-Mar-23_31.5_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": 2011030000999}, "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": "March 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 71076.1969237881}, "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", "Uganda"]}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -2.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 1.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.97, 1.03], [31.5, 1.25], [31.75, 1.15], [32.0, 1.25], [32.25, 1.15], [32.5, 1.25], [33.03, 1.03], [33.18, 0.68], [33.53, 0.53], [33.75, 0.0], [33.65, -0.25], [33.75, -0.5], [33.65, -0.75], [33.75, -1.0], [33.63, -1.3], [34.03, -1.47], [34.25, -2.0], [34.03, -2.53], [33.68, -2.68], [33.53, -3.03], [33.0, -3.25], [32.5, -3.04], [32.0, -3.25], [31.47, -3.03], [31.25, -2.5], [31.35, -2.25], [31.25, -2.0], [31.35, -1.75], [31.25, -1.5], [31.35, -1.25], [31.25, -1.0], [31.35, -0.75], [31.32, -0.68], [30.97, -0.53], [30.75, 0.0], [30.85, 0.25], [30.75, 0.5], [30.97, 1.03]]]]}, "2011-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.97, 1.03], [31.5, 1.25], [31.75, 1.15], [32.0, 1.25], [32.25, 1.15], [32.5, 1.25], [33.03, 1.03], [33.18, 0.68], [33.53, 0.53], [33.75, 0.0], [33.65, -0.25], [33.75, -0.5], [33.65, -0.75], [33.75, -1.0], [33.63, -1.3], [34.03, -1.47], [34.25, -2.0], [34.03, -2.53], [33.68, -2.68], [33.53, -3.03], [33.0, -3.25], [32.5, -3.04], [32.0, -3.25], [31.47, -3.03], [31.25, -2.5], [31.35, -2.25], [31.25, -2.0], [31.35, -1.75], [31.25, -1.5], [31.35, -1.25], [31.25, -1.0], [31.35, -0.75], [31.32, -0.68], [30.97, -0.53], [30.75, 0.0], [30.85, 0.25], [30.75, 0.5], [30.97, 1.03]]]]}, "2011-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.97, 1.03], [31.32, 1.18], [31.47, 1.53], [32.0, 1.75], [32.25, 1.65], [32.5, 1.75], [33.03, 1.53], [33.25, 1.0], [33.15, 0.75], [33.18, 0.68], [33.53, 0.53], [33.75, 0.0], [33.65, -0.25], [33.75, -0.5], [33.65, -0.75], [33.75, -1.0], [33.63, -1.3], [34.03, -1.47], [34.25, -2.0], [34.03, -2.53], [33.68, -2.68], [33.53, -3.03], [33.0, -3.25], [32.5, -3.04], [32.0, -3.25], [31.47, -3.03], [31.25, -2.5], [31.35, -2.25], [31.25, -2.0], [31.35, -1.75], [31.25, -1.5], [31.35, -1.25], [31.25, -1.0], [31.35, -0.75], [31.32, -0.68], [30.97, -0.53], [30.75, 0.0], [30.85, 0.25], [30.75, 0.5], [30.97, 1.03]]]]}, "2011-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.97, 1.03], [31.32, 1.18], [31.47, 1.53], [32.0, 1.75], 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-3.544869868682042}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0455802350452243}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.110616346561017, 21.797902131088335, 21.493828351767775, 21.521027613953436, 21.200575128980915]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.019819017432326, 20.12690444012668, 19.376154700679933, 20.24842349017166, 20.555863080878908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.498222995443046, -1.7723391113042528, -2.029006370224495, -1.8940601397915082, -1.8764623453463969]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.544869868682042, 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