{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:52.889980", "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_25.0_-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": 2022010000872}, "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": 57699.03069278952}, "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"]}, "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": -22.0}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"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], [23.75, -19.35], [24.0, -19.25], [24.53, -19.47], [24.75, -20.0], [24.53, -20.53], [24.18, -20.68], [24.15, -20.75], [24.2, -20.87], [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], [26.03, -22.03], [25.68, -22.18], [25.65, -22.25], [25.75, -22.5], [25.53, -23.03], [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], [21.97, -21.03], [21.82, -20.68], [21.75, -20.65], [21.5, -20.75], [20.97, -20.53], [20.75, -20.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "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": [[[[21.5, -20.75], [20.97, -20.53], [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], [23.75, -19.35], [24.0, -19.25], [24.53, -19.47], [24.75, -20.0], [24.53, -20.53], [24.18, -20.68], [24.15, -20.75], [24.2, -20.87], [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], [26.03, -22.03], [25.68, -22.18], [25.65, -22.25], [25.75, -22.5], [25.53, -23.03], [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], [21.97, -21.03], [21.82, -20.68], [21.75, -20.65], [21.5, -20.75]]]]}, "2022-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, -20.75], [20.97, -20.53], [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], [23.75, -19.35], [24.0, -19.25], [24.53, -19.47], [24.75, -20.0], [24.53, -20.53], [24.18, -20.68], [24.15, -20.75], [24.2, -20.87], [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], [26.03, -22.03], [25.68, -22.18], [25.65, -22.25], [25.75, -22.5], [25.53, -23.03], [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], [21.97, -21.03], [21.82, -20.68], [21.75, -20.65], [21.5, -20.75]]]]}, "2022-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, -20.75], [20.97, -20.53], [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], [23.75, -19.35], [24.0, -19.25], [24.53, -19.47], [24.75, -20.0], [24.53, -20.53], [24.18, -20.68], [24.15, -20.75], [24.2, -20.87], [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], [26.03, -22.03], [25.68, -22.18], [25.65, -22.25], [25.75, -22.5], [25.53, -23.03], [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], [21.97, -21.03], [21.82, -20.68], [21.75, -20.65], [21.5, -20.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.9401410707992}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.511232883660322}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.542061530280705, 21.527933603152462, 22.217750652670816]}, "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": [-3.0843224612752635, -4.081100475718955, -3.3682757139867476]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.3346265463781606, -4.9401410707992, -4.124620910739793]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3406392253870374, -1.821987828579576, -1.5158175772129732]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5204050458158371, -2.084446328328681, -1.7752605223006004]}}