{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:50.454271", "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": "2023-Apr-12_to_2023-Apr-14_28.5_23.0"}, "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": 2023040000507}, "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": "April 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 14 2023"}, "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": 57317.54846910869}, "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": ["Egypt", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 23.0}, "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": 28.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.0, 23.25], [26.25, 23.15], [26.5, 23.25], [26.75, 23.15], [27.0, 23.25], [27.25, 23.15], [27.5, 23.25], [27.75, 23.15], [27.82, 23.18], [27.97, 23.53], [28.5, 23.75], [29.03, 23.53], [29.25, 23.0], [29.15, 22.75], [29.25, 22.5], [29.15, 22.25], [29.25, 22.0], [29.03, 21.47], [28.68, 21.32], [28.53, 20.97], [28.18, 20.82], [28.03, 20.47], [27.5, 20.25], [27.25, 20.35], [27.0, 20.25], [26.47, 20.47], [26.32, 20.82], [25.97, 20.97], [25.82, 21.32], [25.75, 21.35], [25.5, 21.25], [24.97, 21.47], [24.75, 22.0], [24.97, 22.53], [25.32, 22.68], [25.47, 23.03], [26.0, 23.25]]]]}, "2023-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.0, 23.25], [26.25, 23.15], [26.5, 23.25], [26.75, 23.15], [27.0, 23.25], [27.25, 23.15], [27.5, 23.25], [27.75, 23.15], [27.82, 23.18], [27.97, 23.53], [28.5, 23.75], [29.03, 23.53], [29.25, 23.0], [29.15, 22.75], [29.25, 22.5], [29.15, 22.25], [29.25, 22.0], [29.03, 21.47], [28.68, 21.32], [28.53, 20.97], [28.18, 20.82], [28.03, 20.47], [27.5, 20.25], [27.25, 20.35], [27.0, 20.25], [26.47, 20.47], [26.32, 20.82], [25.97, 20.97], [25.82, 21.32], [25.75, 21.35], [25.5, 21.25], [24.97, 21.47], [24.75, 22.0], [24.97, 22.53], [25.32, 22.68], [25.47, 23.03], [26.0, 23.25]]]]}, "2023-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.0, 23.25], [26.25, 23.15], [26.5, 23.25], [26.75, 23.15], [27.0, 23.25], [27.25, 23.15], [27.5, 23.25], [27.75, 23.15], [27.82, 23.18], [27.97, 23.53], [28.5, 23.75], [29.03, 23.53], [29.25, 23.0], [29.15, 22.75], [29.25, 22.5], [29.15, 22.25], [29.25, 22.0], [29.03, 21.47], [28.68, 21.32], [28.53, 20.97], [28.18, 20.82], [28.03, 20.47], [27.5, 20.25], [27.25, 20.35], [27.0, 20.25], [26.47, 20.47], [26.32, 20.82], [25.97, 20.97], [25.82, 21.32], [25.75, 21.35], [25.5, 21.25], [24.97, 21.47], [24.75, 22.0], [24.97, 22.53], [25.32, 22.68], [25.47, 23.03], [26.0, 23.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.949525019640419}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.716872344476172}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.701497852427337, 17.59215228960005, 19.91151402290393]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.54811765561834, 16.61787112163853, 18.97651157729871]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.210126957190164, -6.532429030632048, -4.408061045606305]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.949525019640419, -6.870465139753151, -4.648277278623709]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9747244438862424, -2.0891849277889687, -1.4086221145020659]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2166965151244886, -2.238178816473141, -1.4986438270344016]}}