{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:11.027113", "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": "2021-Oct-11_to_2021-Oct-13_31.5_-13.5"}, "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": 2021100000394}, "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": "October 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 13 2021"}, "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": 65916.65465263068}, "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": ["Malawi", "Mozambique", "Zambia", "Zimbabwe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "Africa", "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": -13.5}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[29.82, -14.82], [29.85, -14.75], [29.75, -14.5], [29.85, -14.25], [29.75, -14.0], [29.85, -13.75], [29.75, -13.5], [29.85, -13.25], [29.75, -13.0], [29.97, -12.47], [30.5, -12.25], [30.75, -12.35], [31.0, -12.25], [31.25, -12.35], [31.5, -12.25], [32.03, -12.47], [32.18, -12.82], [32.25, -12.85], [32.5, -12.75], [32.75, -12.85], [33.0, -12.75], [33.53, -12.97], [33.68, -13.32], [34.03, -13.47], [34.18, -13.82], [34.25, -13.85], [34.32, -13.82], [34.47, -13.47], [35.0, -13.25], [35.53, -13.47], [35.75, -14.0], [35.65, -14.25], [35.75, -14.5], [35.65, -14.75], [35.75, -15.0], [35.65, -15.25], [35.75, -15.5], [35.53, -16.03], [35.0, -16.25], [34.47, -16.03], [34.25, -15.5], [34.35, -15.25], [34.32, -15.18], [34.25, -15.15], [34.0, -15.25], [33.47, -15.03], [33.32, -14.68], [32.97, -14.53], [32.82, -14.18], [32.75, -14.15], [32.5, -14.25], [32.25, -14.15], [32.0, -14.25], [31.75, -14.15], [31.5, -14.25], [31.25, -14.15], [31.18, -14.18], [31.15, -14.25], [31.25, -14.5], [31.15, -14.75], [31.25, -15.0], [31.15, -15.25], [31.25, -15.5], [31.03, -16.03], [30.68, -16.18], [30.53, -16.53], [30.0, -16.75], [29.47, -16.53], [29.25, -16.0], [29.35, -15.75], [29.25, -15.5], [29.47, -14.97], [29.82, -14.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.25, -15.5], [29.47, -14.97], [29.82, -14.82], [29.85, -14.75], [29.75, -14.5], [29.85, -14.25], [29.75, -14.0], [29.85, -13.75], [29.75, -13.5], [29.85, -13.25], [29.75, -13.0], [29.97, -12.47], [30.5, -12.25], [30.75, -12.35], [31.0, -12.25], [31.25, -12.35], [31.5, -12.25], [32.03, -12.47], [32.18, -12.82], [32.25, -12.85], [32.5, -12.75], [32.75, -12.85], [33.0, -12.75], [33.53, -12.97], [33.68, -13.32], [34.03, -13.47], [34.18, -13.82], [34.25, -13.85], [34.32, -13.82], [34.47, -13.47], [35.0, -13.25], [35.53, -13.47], [35.75, -14.0], [35.65, -14.25], [35.75, -14.5], [35.65, -14.75], [35.75, -15.0], [35.65, -15.25], [35.75, -15.5], [35.53, -16.03], [35.0, -16.25], [34.47, -16.03], [34.25, -15.5], [34.35, -15.25], [34.32, -15.18], [34.25, -15.15], [34.0, -15.25], [33.47, -15.03], [33.32, -14.68], [32.97, -14.53], [32.82, -14.18], [32.75, -14.15], [32.5, -14.25], [32.25, -14.15], [32.0, -14.25], [31.75, -14.15], [31.5, -14.25], [31.25, -14.15], [31.18, -14.18], [31.15, -14.25], [31.25, -14.5], [31.15, -14.75], [31.25, -15.0], [31.15, -15.25], [31.25, -15.5], [31.03, -16.03], [30.68, -16.18], [30.53, -16.53], [30.0, -16.75], [29.47, -16.53], [29.25, -16.0], [29.35, -15.75], [29.25, -15.5]]]]}, "2021-10-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.25, -15.5], [29.47, -14.97], [29.82, -14.82], [29.85, -14.75], [29.75, -14.5], [29.85, -14.25], [29.75, -14.0], [29.85, -13.75], [29.75, -13.5], [29.85, -13.25], [29.75, -13.0], [29.97, -12.47], [30.5, -12.25], [30.75, -12.35], [31.0, -12.25], [31.25, -12.35], [31.5, -12.25], [32.03, -12.47], [32.18, -12.82], [32.25, -12.85], [32.5, -12.75], [32.75, -12.85], [33.0, -12.75], [33.53, -12.97], [33.68, -13.32], [34.03, -13.47], [34.18, -13.82], [34.25, -13.85], [34.32, -13.82], [34.47, -13.47], [35.0, -13.25], [35.53, -13.47], [35.75, -14.0], [35.65, -14.25], [35.75, -14.5], [35.65, -14.75], [35.75, -15.0], [35.65, -15.25], [35.75, -15.5], [35.53, -16.03], [35.0, -16.25], [34.47, -16.03], [34.25, -15.5], [34.35, -15.25], [34.32, -15.18], [34.25, -15.15], [34.0, -15.25], [33.47, -15.03], [33.32, -14.68], [32.97, -14.53], [32.82, -14.18], [32.75, -14.15], [32.5, -14.25], [32.25, -14.15], [32.0, -14.25], [31.75, -14.15], [31.5, -14.25], [31.25, -14.15], [31.18, -14.18], [31.15, -14.25], [31.25, -14.5], [31.15, -14.75], [31.25, -15.0], [31.15, -15.25], [31.25, -15.5], [31.03, -16.03], [30.68, -16.18], [30.53, -16.53], [30.0, -16.75], [29.47, -16.53], [29.25, -16.0], [29.35, -15.75], [29.25, -15.5]]]]}, "2021-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.25, -15.5], [29.47, -14.97], [29.82, -14.82], [29.85, -14.75], [29.75, -14.5], [29.85, -14.25], [29.75, -14.0], [29.85, -13.75], [29.75, -13.5], [29.85, -13.25], [29.75, -13.0], [29.97, -12.47], [30.5, -12.25], [30.75, -12.35], [31.0, -12.25], [31.25, -12.35], [31.5, -12.25], [32.03, -12.47], [32.18, -12.82], [32.25, -12.85], [32.5, -12.75], [32.75, -12.85], [33.0, -12.75], [33.53, -12.97], [33.68, -13.32], [34.03, -13.47], [34.18, -13.82], [34.25, -13.85], [34.32, -13.82], [34.47, -13.47], [35.0, -13.25], [35.53, -13.47], [35.75, -14.0], [35.65, -14.25], [35.75, -14.5], [35.65, -14.75], [35.75, -15.0], [35.65, -15.25], [35.75, -15.5], [35.53, -16.03], [35.0, -16.25], [34.47, -16.03], [34.25, -15.5], [34.35, -15.25], [34.32, -15.18], [34.25, -15.15], [34.0, -15.25], [33.47, -15.03], [33.32, -14.68], [32.97, -14.53], [32.82, -14.18], [32.75, -14.15], [32.5, -14.25], [32.25, -14.15], [32.0, -14.25], [31.75, -14.15], [31.5, -14.25], [31.25, -14.15], [31.18, -14.18], [31.15, -14.25], [31.25, -14.5], [31.15, -14.75], [31.25, -15.0], [31.15, -15.25], [31.25, -15.5], [31.03, -16.03], [30.68, -16.18], [30.53, -16.53], [30.0, -16.75], [29.47, -16.53], [29.25, -16.0], [29.35, -15.75], [29.25, -15.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.059951711357144}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.579769952547783}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.387489925344767, 21.30207310524753, 23.55699566522236]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.736956787825363, 16.625691344082327, 19.813571825155066]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.907967327604643, -5.030760344744232, -2.8005821852944734]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7420715798826905, -6.059951711357144, -3.538474367451329]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5394206430210382, -2.7605356279115316, -1.5191806258800218]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9703411938179798, -3.256244467728761, -2.0565953922201774]}}