{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:02.511730", "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-29_to_2018-Oct-02_334.5_14.0"}, "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": 2018090001019}, "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 29 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 95830.94095812627}, "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": ["Cabo Verde"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Atlantic-Ocean"]}, "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": ["North Atlantic Ocean"]}, "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": 14.0}, "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": 334.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "334.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 333.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 336.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-27.15, 15.25], [-27.25, 15.5], [-27.03, 16.03], [-26.5, 16.25], [-26.25, 16.15], [-26.0, 16.25], [-25.75, 16.15], [-25.5, 16.25], [-24.97, 16.03], [-24.82, 15.68], [-24.75, 15.65], [-24.5, 15.75], [-24.25, 15.65], [-24.0, 15.75], [-23.75, 15.65], [-23.5, 15.75], [-22.97, 15.53], [-22.75, 15.0], [-22.85, 14.75], [-22.75, 14.5], [-22.85, 14.25], [-22.75, 14.0], [-22.85, 13.75], [-22.75, 13.5], [-22.97, 12.97], [-23.5, 12.75], [-23.75, 12.85], [-24.0, 12.75], [-24.25, 12.85], [-24.5, 12.75], [-24.75, 12.85], [-25.0, 12.75], [-25.25, 12.85], [-25.5, 12.75], [-25.75, 12.85], [-26.0, 12.75], [-26.53, 12.97], [-26.75, 13.5], [-26.65, 13.75], [-26.68, 13.82], [-27.03, 13.97], [-27.25, 14.5], [-27.15, 14.75], [-27.25, 15.0], [-27.15, 15.25]]]]}, "2018-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-27.15, 14.25], [-27.25, 14.5], [-27.15, 14.75], [-27.25, 15.0], [-27.15, 15.25], [-27.25, 15.5], [-27.03, 16.03], [-26.5, 16.25], [-26.25, 16.15], [-26.0, 16.25], [-25.75, 16.15], [-25.5, 16.25], [-24.97, 16.03], [-24.82, 15.68], [-24.75, 15.65], [-24.5, 15.75], [-24.25, 15.65], [-24.0, 15.75], [-23.75, 15.65], [-23.5, 15.75], [-22.97, 15.53], [-22.75, 15.0], [-22.85, 14.75], [-22.75, 14.5], [-22.85, 14.25], [-22.75, 14.0], [-22.85, 13.75], [-22.75, 13.5], [-22.97, 12.97], [-23.5, 12.75], [-23.75, 12.85], [-24.0, 12.75], [-24.25, 12.85], [-24.5, 12.75], [-24.75, 12.85], [-25.0, 12.75], [-25.25, 12.85], [-25.32, 12.82], [-25.47, 12.47], [-26.0, 12.25], [-26.53, 12.47], [-26.68, 12.82], [-27.03, 12.97], [-27.25, 13.5], [-27.15, 13.75], [-27.25, 14.0], [-27.15, 14.25]]]]}, "2018-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-27.15, 14.25], [-27.25, 14.5], [-27.15, 14.75], [-27.25, 15.0], [-27.15, 15.25], [-27.25, 15.5], [-27.03, 16.03], [-26.5, 16.25], [-26.25, 16.15], [-26.0, 16.25], [-25.75, 16.15], [-25.5, 16.25], [-24.97, 16.03], [-24.82, 15.68], [-24.75, 15.65], [-24.5, 15.75], [-24.25, 15.65], [-24.0, 15.75], [-23.75, 15.65], [-23.5, 15.75], [-22.97, 15.53], [-22.75, 15.0], [-22.85, 14.75], [-22.75, 14.5], [-22.85, 14.25], [-22.75, 14.0], [-22.85, 13.75], [-22.75, 13.5], [-22.97, 12.97], [-23.5, 12.75], [-23.75, 12.85], [-24.0, 12.75], [-24.25, 12.85], [-24.5, 12.75], [-24.75, 12.85], [-25.0, 12.75], [-25.25, 12.85], [-25.32, 12.82], [-25.47, 12.47], [-26.0, 12.25], [-26.53, 12.47], [-26.68, 12.82], [-27.03, 12.97], [-27.25, 13.5], [-27.15, 13.75], [-27.25, 14.0], [-27.15, 14.25]]]]}, "2018-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-27.03, 14.53], [-26.5, 14.75], [-26.25, 14.65], [-26.0, 14.75], [-25.75, 14.65], [-25.5, 14.75], [-25.25, 14.65], [-25.0, 14.75], [-24.75, 14.65], [-24.5, 14.75], [-23.97, 14.53], [-23.75, 14.0], [-23.85, 13.75], [-23.75, 13.5], [-23.97, 12.97], [-24.5, 12.75], [-24.75, 12.85], [-25.0, 12.75], [-25.25, 12.85], [-25.32, 12.82], [-25.47, 12.47], [-26.0, 12.25], [-26.53, 12.47], [-26.68, 12.82], [-27.03, 12.97], [-27.25, 13.5], [-27.15, 13.75], [-27.25, 14.0], [-27.03, 14.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.2536907428544737}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.932971145713303}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.837218002088946, 25.750510334404225, 25.8556465803249, 26.109072664567975]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.519764129208852, 24.424052396861498, 24.63797670846293, 26.034297871023682]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8977448993723458, -1.0123629434324517, -0.9117935732546822, -0.8564898671270178]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1951410548900299, -1.2536907428544737, -1.0751756381537234, -0.9531626740761681]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7385305099486572, -1.9369913825463243, -1.6970880407430362, -1.5858519854538022]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.344561239555958, -2.4208929255194844, -1.987558698024771, -1.7842801644492043]}}