{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:50.752849", "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-Aug-15_to_2023-Aug-20_5.5_23.5"}, "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": 2023080000507}, "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": "August 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 20 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 116018.6951088391}, "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": ["Algeria"]}, "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": 23.5}, "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": 5.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "5.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 7.5}, "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": 25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[2.75, 23.85], [2.5, 23.75], [1.97, 23.97], [1.75, 24.5], [1.97, 25.03], [2.5, 25.25], [2.75, 25.15], [3.0, 25.25], [3.25, 25.15], [3.32, 25.18], [3.47, 25.53], [4.0, 25.75], [4.25, 25.65], [4.5, 25.75], [5.0, 25.54], [5.5, 25.75], [6.03, 25.53], [6.18, 25.18], [6.25, 25.15], [6.5, 25.25], [7.03, 25.03], [7.18, 24.68], [7.53, 24.53], [7.68, 24.18], [8.03, 24.03], [8.25, 23.5], [8.03, 22.97], [7.5, 22.75], [7.25, 22.85], [7.18, 22.82], [7.03, 22.47], [6.68, 22.32], [6.53, 21.97], [6.0, 21.75], [5.75, 21.85], [5.5, 21.75], [5.25, 21.85], [5.0, 21.75], [4.75, 21.85], [4.5, 21.75], [4.25, 21.85], [4.0, 21.75], [3.47, 21.97], [3.32, 22.32], [2.97, 22.47], [2.75, 23.0], [2.85, 23.25], [2.75, 23.5], [2.85, 23.75], [2.82, 23.82], [2.75, 23.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.5, 23.25], [2.97, 23.47], [2.75, 24.0], [2.97, 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"evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.809525159923055, 29.834494224572666, 28.33854303125844, 29.616866372822244, 30.04201720324386, 25.9233309729932]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.968552905301635, 21.029908141543444, 19.069636360322818, 20.998913757752064, 22.39029920366886, 25.9233309729932]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9765436749761516, -2.7354074663713432, -4.156921103876194, -2.8406181672231074, -1.9736616215182143, -2.9074336586877507]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.9226855772421345, -4.966522835818012, -6.381791586000475, -5.158654762735978, -3.730488749828055, -2.9074336586877507]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.581746584405728, -2.218422021530649, -3.455583558212192, -2.361804486731349, -1.595082791110925, -2.1511167084351968]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2001634118714173, -3.736530219365297, -4.929485685293058, -4.079959923938727, -2.849830805034068, -2.1511167084351968]}}