{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:34.184392", "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-Jan-24_to_2011-Jan-26_43.0_4.5"}, "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": 2011010001216}, "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": "January 24 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 26 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 58492.43164902233}, "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": ["Ethiopia", "Somalia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": 4.5}, "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": 43.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 42.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.85, 4.75], [41.75, 5.0], [41.97, 5.53], [42.5, 5.75], [42.75, 5.65], [42.82, 5.68], [42.97, 6.03], [43.32, 6.18], [43.35, 6.25], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [45.03, 7.03], [45.25, 6.5], [45.15, 6.25], [45.18, 6.18], [45.53, 6.03], [45.75, 5.5], [45.65, 5.25], [45.75, 5.0], [45.53, 4.47], [45.0, 4.25], [44.75, 4.35], [44.5, 4.25], [44.25, 4.35], [44.18, 4.32], [44.15, 4.25], [44.25, 4.0], [44.03, 3.47], [43.5, 3.25], [43.25, 3.35], [43.0, 3.25], [42.75, 3.35], [42.5, 3.25], [41.97, 3.47], [41.75, 4.0], [41.85, 4.25], [41.75, 4.5], [41.85, 4.75]]]]}, "2011-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.85, 4.75], [41.75, 5.0], [41.97, 5.53], [42.5, 5.75], [42.75, 5.65], [42.82, 5.68], [42.97, 6.03], [43.32, 6.18], [43.35, 6.25], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [45.03, 7.03], [45.25, 6.5], [45.15, 6.25], [45.18, 6.18], [45.53, 6.03], [45.75, 5.5], [45.65, 5.25], [45.75, 5.0], [45.53, 4.47], [45.0, 4.25], [44.75, 4.35], [44.5, 4.25], [44.25, 4.35], [44.18, 4.32], [44.15, 4.25], [44.25, 4.0], [44.03, 3.47], [43.5, 3.25], [43.25, 3.35], [43.0, 3.25], [42.75, 3.35], [42.5, 3.25], [41.97, 3.47], [41.75, 4.0], [41.85, 4.25], [41.75, 4.5], [41.85, 4.75]]]]}, "2011-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.85, 4.75], [41.75, 5.0], [41.97, 5.53], [42.5, 5.75], [42.75, 5.65], [42.82, 5.68], [42.97, 6.03], [43.32, 6.18], [43.35, 6.25], [43.25, 6.5], [43.47, 7.03], [44.0, 7.25], [44.25, 7.15], [44.5, 7.25], [45.03, 7.03], [45.25, 6.5], [45.15, 6.25], [45.18, 6.18], [45.53, 6.03], [45.75, 5.5], [45.65, 5.25], [45.75, 5.0], [45.53, 4.47], [45.0, 4.25], [44.75, 4.35], [44.5, 4.25], [44.25, 4.35], [44.18, 4.32], [44.15, 4.25], [44.25, 4.0], [44.03, 3.47], [43.5, 3.25], [43.25, 3.35], [43.0, 3.25], [42.75, 3.35], [42.5, 3.25], [41.97, 3.47], [41.75, 4.0], [41.85, 4.25], [41.75, 4.5], [41.85, 4.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.0028699834511485}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5979110310930436}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.635730848299488, 26.58141864084439, 27.05487582795456]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.411470006009324, 25.391280033237933, 25.797254839266998]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7030578243399317, -1.7799381818601738, -1.3107370870790251]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8913971764171151, -2.0028699834511485, -1.5102228432533593]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8631001806429939, -1.9380080000472655, -1.4185224398890184]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.235271019756487, -2.146399776189351, -1.6293773253390693]}}