{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:56.210406", "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": "2022-Jan-22_to_2022-Jan-24_24.5_-22.5"}, "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": 2022010000842}, "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 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2022"}, "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": 66287.46867710106}, "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": ["Botswana"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.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": -22.5}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.75}, "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": {"2022-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.0], [20.97, -19.47], [21.5, -19.25], [21.75, -19.35], [22.0, -19.25], [22.25, -19.35], [22.5, -19.25], [22.75, -19.35], [23.0, -19.25], [23.25, -19.35], [23.5, -19.25], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.25, -20.5], [24.15, -20.75], [24.18, -20.82], [24.25, -20.85], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.25, -20.85], [25.5, -20.75], [26.03, -20.97], [26.25, -21.5], [26.15, -21.75], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.03, -23.03], [25.5, -23.25], [25.25, -23.15], [25.0, -23.25], [24.75, -23.15], [24.5, -23.25], [23.97, -23.03], [23.82, -22.68], [23.47, -22.53], [23.32, -22.18], [22.97, -22.03], [22.82, -21.68], [22.47, -21.53], [22.32, -21.18], [22.25, -21.15], [22.0, -21.25], [21.47, -21.03], [21.32, -20.68], [20.97, -20.53], [20.75, -20.0]]]]}, "2022-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.0], [20.97, -19.47], [21.5, -19.25], [21.75, -19.35], [22.0, -19.25], [22.25, -19.35], [22.5, -19.25], [22.75, -19.35], [23.0, -19.25], [23.25, -19.35], [23.5, -19.25], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.25, -20.5], [24.15, -20.75], [24.18, -20.82], [24.25, -20.85], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.25, -20.85], [25.5, -20.75], [26.03, -20.97], [26.25, -21.5], [26.15, -21.75], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.03, -23.03], [25.5, -23.25], [25.25, -23.15], [25.0, -23.25], [24.75, -23.15], [24.5, -23.25], [23.97, -23.03], [23.82, -22.68], [23.47, -22.53], [23.32, -22.18], [22.97, -22.03], [22.82, -21.68], [22.47, -21.53], [22.32, -21.18], [22.25, -21.15], [22.0, -21.25], [21.47, -21.03], [21.32, -20.68], [20.97, -20.53], [20.75, -20.0]]]]}, "2022-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.0], [20.97, -19.47], [21.5, -19.25], [21.75, -19.35], [22.0, -19.25], [22.25, -19.35], [22.5, -19.25], [22.75, -19.35], [23.0, -19.25], [23.25, -19.35], [23.5, -19.25], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.25, -20.5], [24.15, -20.75], [24.18, -20.82], [24.25, -20.85], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.25, -20.85], [25.5, -20.75], [26.03, -20.97], [26.25, -21.5], [26.15, -21.75], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5], [26.03, -23.03], [25.5, -23.25], [25.25, -23.15], [25.0, -23.25], [24.75, -23.15], [24.5, -23.25], [23.97, -23.03], [23.82, -22.68], [23.47, -22.53], [23.32, -22.18], [22.97, -22.03], [22.82, -21.68], [22.47, -21.53], [22.32, -21.18], [22.25, -21.15], [22.0, -21.25], [21.47, -21.03], [21.32, -20.68], [20.97, -20.53], [20.75, -20.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.985577639253904}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.584434111960158}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.522947922480967, 21.473321338081348, 22.16798639187158]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.992729954740014, 20.81104603784769, 21.65805842165139]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1379152414047824, -4.157937074291255, -3.457450020184435]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.3542796234377192, -4.985577639253904, -4.262038597734374]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3272145697479947, -1.7590017858185905, -1.4768182879518863]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.464038752735779, -2.0167702873946016, -1.7418287777566293]}}