{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:48.658219", "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-Mar-23_to_2023-Mar-25_24.0_-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": 2023030000770}, "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": "March 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 25 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": 54122.32819700604}, "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": -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": 24.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[21.97, -21.47], [22.5, -21.25], [22.75, -21.35], [23.0, -21.25], [23.25, -21.35], [23.5, -21.25], [24.03, -21.47], [24.18, -21.82], [24.25, -21.85], [24.5, -21.75], [25.03, -21.97], [25.18, -22.32], [25.53, -22.47], [25.75, -23.0], [25.53, -23.53], [25.13, -23.7], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [23.97, -24.53], [23.82, -24.18], [23.75, -24.15], [23.5, -24.25], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.32, -23.68], [22.25, -23.65], [22.0, -23.75], [21.47, -23.53], [21.25, -23.0], [21.47, -22.47], [21.82, -22.32], [21.85, -22.25], [21.75, -22.0], [21.97, -21.47]]]]}}, "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": {"2023-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -22.25], [21.75, -22.0], [21.97, -21.47], [22.5, -21.25], [22.75, -21.35], [23.0, -21.25], [23.25, -21.35], [23.5, -21.25], [24.03, -21.47], [24.18, -21.82], [24.25, -21.85], [24.5, -21.75], [25.03, -21.97], [25.18, -22.32], [25.53, -22.47], [25.75, -23.0], [25.53, -23.53], [25.13, -23.7], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [23.97, -24.53], [23.82, -24.18], [23.75, -24.15], [23.5, -24.25], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.32, -23.68], [22.25, -23.65], [22.0, -23.75], [21.47, -23.53], [21.25, -23.0], [21.47, -22.47], [21.82, -22.32], [21.85, -22.25]]]]}, "2023-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -22.25], [21.75, -22.0], [21.97, -21.47], [22.5, -21.25], [22.75, -21.35], [23.0, -21.25], [23.25, -21.35], [23.5, -21.25], [24.03, -21.47], [24.18, -21.82], [24.25, -21.85], [24.5, -21.75], [25.03, -21.97], [25.18, -22.32], [25.53, -22.47], [25.75, -23.0], [25.53, -23.53], [25.13, -23.7], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [23.97, -24.53], [23.82, -24.18], [23.75, -24.15], [23.5, -24.25], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.32, -23.68], [22.25, -23.65], [22.0, -23.75], [21.47, -23.53], [21.25, -23.0], [21.47, -22.47], [21.82, -22.32], [21.85, -22.25]]]]}, "2023-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -22.25], [21.75, -22.0], [21.97, -21.47], [22.5, -21.25], [22.75, -21.35], [23.0, -21.25], [23.25, -21.35], [23.5, -21.25], [24.03, -21.47], [24.18, -21.82], [24.25, -21.85], [24.5, -21.75], [25.03, -21.97], [25.18, -22.32], [25.53, -22.47], [25.75, -23.0], [25.53, -23.53], [25.13, -23.7], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [23.97, -24.53], [23.82, -24.18], [23.75, -24.15], [23.5, -24.25], [23.25, -24.15], [23.0, -24.25], [22.47, -24.03], [22.32, -23.68], [22.25, -23.65], [22.0, -23.75], [21.47, -23.53], [21.25, -23.0], [21.47, -22.47], [21.82, -22.32], [21.85, -22.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.8418222909363635}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3463645195476497}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.14761134688547, 21.002634702688738, 21.134589239468482]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.036467849375015, 19.907869352127364, 20.448746499099514]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.061978788054235, -3.1172530390486877, -2.859861731540027]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.8418222909363635, -3.839951783931099, -3.5774036197930172]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7963442550410846, -1.4174918313484521, -1.3253898608637835]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0732972879208913, -1.758308520453043, -1.672549168580974]}}