{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:59.561702", "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": "2018-Sep-10_to_2018-Sep-14_44.0_-22.0"}, "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": 2018090000431}, "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": "September 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 14 2018"}, "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": 66068.6872235109}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "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": ["Mozambique Channel"]}, "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": -22.0}, "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": 44.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "44.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 43.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.85, -21.75], [42.75, -21.5], [42.97, -20.97], [43.5, -20.75], [43.75, -20.85], [43.82, -20.82], [43.97, -20.47], [44.5, -20.25], [44.75, -20.35], [45.0, -20.25], [45.53, -20.47], [45.75, -21.0], [45.65, -21.25], [45.68, -21.32], [46.03, -21.47], [46.25, -22.0], [46.03, -22.53], [45.5, -22.75], [45.25, -22.65], [45.18, -22.68], [45.13, -22.8], [45.53, -22.97], [45.75, -23.5], [45.53, -24.03], [45.0, -24.25], [44.75, -24.15], [44.5, -24.25], [43.97, -24.03], [43.82, -23.68], [43.47, -23.53], [43.32, -23.18], [42.97, -23.03], [42.75, -22.5], [42.85, -22.25], [42.75, -22.0], [42.85, -21.75]]]]}, "2018-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.85, -21.75], [42.75, -21.5], [42.97, -20.97], [43.32, -20.82], [43.35, -20.75], [43.25, -20.5], [43.35, -20.25], [43.25, -20.0], [43.47, -19.47], [44.0, -19.25], [44.25, -19.35], [44.5, -19.25], [45.03, -19.47], [45.18, -19.82], [45.53, -19.97], [45.75, -20.5], [45.65, -20.75], [45.75, -21.0], [45.65, -21.25], [45.68, -21.32], [46.03, -21.47], [46.25, -22.0], [46.03, -22.53], [45.5, -22.75], [45.25, -22.65], [45.18, -22.68], [45.13, -22.8], [45.53, -22.97], [45.75, -23.5], [45.53, -24.03], [45.0, -24.25], [44.75, -24.15], [44.5, -24.25], [43.97, -24.03], [43.82, -23.68], [43.47, -23.53], [43.32, -23.18], [42.97, -23.03], [42.75, -22.5], [42.85, -22.25], [42.75, -22.0], [42.85, -21.75]]]]}, "2018-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.85, -21.75], [42.75, -21.5], [42.97, -20.97], [43.32, -20.82], [43.35, -20.75], [43.25, -20.5], [43.35, -20.25], [43.25, -20.0], [43.47, -19.47], [44.0, -19.25], [44.25, -19.35], [44.5, -19.25], [45.03, -19.47], [45.18, -19.82], [45.53, -19.97], [45.75, -20.5], [45.65, -20.75], [45.75, -21.0], [45.65, -21.25], [45.68, -21.32], [46.03, -21.47], [46.25, -22.0], [46.03, -22.53], [45.5, -22.75], [45.25, -22.65], [45.18, -22.68], [45.13, -22.8], [45.53, -22.97], [45.75, -23.5], [45.53, -24.03], [45.0, -24.25], [44.75, -24.15], [44.5, -24.25], [43.97, -24.03], [43.82, -23.68], [43.47, -23.53], [43.32, -23.18], [42.97, -23.03], [42.75, -22.5], [42.85, -22.25], [42.75, -22.0], [42.85, -21.75]]]]}, "2018-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.97, -20.97], [43.32, -20.82], [43.35, -20.75], [43.25, -20.5], [43.35, -20.25], [43.25, -20.0], [43.47, -19.47], [44.0, -19.25], [44.25, -19.35], [44.5, -19.25], [45.03, -19.47], [45.18, -19.82], [45.53, -19.97], [45.75, -20.5], [45.65, -20.75], [45.75, -21.0], [45.65, -21.25], [45.75, -21.5], [45.53, -22.03], [45.18, -22.18], [45.03, -22.53], [44.5, -22.75], [44.25, -22.65], [44.0, -22.75], [43.75, -22.65], [43.5, -22.75], [42.97, -22.53], [42.75, -22.0], [42.85, -21.75], [42.75, -21.5], [42.97, -20.97]]]]}, "2018-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.97, -20.97], [43.32, -20.82], [43.47, -20.47], [44.0, -20.25], [44.25, -20.35], [44.5, -20.25], [45.03, -20.47], [45.25, -21.0], [45.03, -21.53], [44.68, -21.68], [44.65, -21.75], [44.75, -22.0], [44.53, -22.53], [44.0, -22.75], [43.75, -22.65], [43.5, -22.75], [42.97, -22.53], [42.75, -22.0], [42.85, -21.75], [42.75, -21.5], [42.97, -20.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.131189786648463}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5618170734476977}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.67034284728328, 21.14142856074494, 21.38397956055593, 22.720961667505037, 22.5219201648419]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.195901142925777, 17.75446015554536, 18.574047580803096, 21.655949153797962, 21.831407155942088]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.8866948520611286, 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