{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:47.619132", "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-Feb-25_to_2011-Mar-02_30.5_-18.0"}, "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": 2011020001223}, "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 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 02 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 53046.67071121493}, "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": ["Zimbabwe"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": -18.0}, "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": 30.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.5, -16.25], [31.03, -16.47], [31.25, -17.0], [31.15, -17.25], [31.25, -17.5], [31.03, -18.03], [30.5, -18.25], [30.25, -18.15], [30.0, -18.25], [29.47, -18.03], [29.25, -17.5], [29.47, -16.97], [29.82, -16.82], [29.97, -16.47], [30.5, -16.25]]]]}, "2011-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.32, -16.82], [28.47, -16.47], [29.0, -16.25], [29.25, -16.35], [29.5, -16.25], [29.75, -16.35], [30.0, -16.25], [30.25, -16.35], [30.5, -16.25], [30.75, -16.35], [31.0, -16.25], [31.53, -16.47], [31.75, -17.0], [31.65, -17.25], [31.75, -17.5], [31.65, -17.75], [31.75, -18.0], [31.53, -18.53], [31.0, -18.75], [30.75, -18.65], [30.5, -18.75], [30.25, -18.65], [30.0, -18.75], [29.75, -18.65], [29.5, -18.75], [29.25, -18.65], [29.0, -18.75], [28.75, -18.65], [28.5, -18.75], [28.25, -18.65], [28.0, -18.75], [27.47, -18.53], [27.25, -18.0], [27.47, -17.47], [27.82, -17.32], [27.97, -16.97], [28.32, -16.82]]]]}, "2011-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.32, -16.82], [28.47, -16.47], [29.0, -16.25], [29.25, -16.35], [29.5, -16.25], [29.75, -16.35], [30.0, -16.25], [30.25, -16.35], [30.5, -16.25], [30.75, -16.35], [31.0, -16.25], [31.53, -16.47], [31.75, -17.0], [31.65, -17.25], [31.75, -17.5], [31.65, -17.75], [31.75, -18.0], [31.53, -18.53], [31.0, -18.75], [30.75, -18.65], [30.5, -18.75], [30.25, -18.65], [30.0, -18.75], [29.75, -18.65], [29.5, -18.75], [29.25, -18.65], [29.0, -18.75], [28.75, -18.65], [28.5, -18.75], [28.25, -18.65], [28.0, -18.75], [27.47, -18.53], [27.25, -18.0], [27.47, -17.47], [27.82, -17.32], [27.97, -16.97], [28.32, -16.82]]]]}, "2011-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.32, -16.82], [28.47, -16.47], [29.0, -16.25], [29.25, -16.35], [29.5, -16.25], [29.75, -16.35], [30.0, -16.25], [30.25, -16.35], [30.5, -16.25], [30.75, -16.35], [31.0, -16.25], [31.53, -16.47], [31.75, -17.0], [31.65, -17.25], [31.75, -17.5], [31.65, -17.75], [31.75, -18.0], [31.53, -18.53], [31.0, -18.75], [30.75, -18.65], [30.5, -18.75], [30.25, -18.65], [30.0, -18.75], [29.75, -18.65], [29.5, -18.75], [29.25, -18.65], [29.0, -18.75], [28.75, -18.65], [28.5, -18.75], [28.25, -18.65], [28.0, -18.75], [27.47, -18.53], [27.25, -18.0], [27.47, -17.47], [27.82, -17.32], [27.97, -16.97], [28.32, -16.82]]]]}, "2011-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.97, -18.53], [29.75, -18.0], [29.97, -17.47], [30.5, -17.25], [30.75, -17.35], [31.0, -17.25], [31.53, -17.47], [31.75, -18.0], [31.53, -18.53], [31.0, -18.75], [30.75, -18.65], [30.5, -18.75], [29.97, -18.53]]]]}, "2011-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.97, -18.53], [29.75, -18.0], [29.97, -17.47], [30.5, -17.25], [30.75, -17.35], [31.0, -17.25], [31.53, -17.47], [31.75, -18.0], [31.53, -18.53], [31.0, -18.75], [30.75, -18.65], [30.5, -18.75], [29.97, -18.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.501046504780504}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2933458804765734}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.63278825340285, 19.926656098563456, 20.889853484969763, 20.59790912850133, 19.24673871533531, 19.313411927066227]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.83736611796263, 17.823455002075264, 18.546795060586533, 18.989647013180672, 18.723341382574915, 18.73646688234237]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5412962895247044, -2.9406160893158337, -1.9413650690943502, -2.189237640656804, -2.052440749605182, -1.9416949790403635]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m 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