{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:50.149603", "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-17_to_2022-Jan-21_2.0_18.5"}, "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": 2022010000714}, "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 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 91044.65484708911}, "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", "Mali"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 18.5}, "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": 2.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "2.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 0.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.0}, "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": 20.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[0.25, 18.0], [0.47, 18.53], [0.82, 18.68], [0.85, 18.75], [0.75, 19.0], [0.97, 19.53], [1.32, 19.68], [1.47, 20.03], [1.82, 20.18], [1.97, 20.53], [2.5, 20.75], [2.75, 20.65], [3.0, 20.75], [3.25, 20.65], [3.32, 20.68], [3.47, 21.03], [4.0, 21.25], [4.53, 21.03], [4.75, 20.5], [4.53, 19.97], [4.18, 19.82], [4.03, 19.47], [3.68, 19.32], [3.65, 19.25], [3.75, 19.0], [3.53, 18.47], [3.18, 18.32], [3.15, 18.25], [3.25, 18.0], [3.15, 17.75], [3.18, 17.68], [3.53, 17.53], [3.75, 17.0], [3.53, 16.47], [3.0, 16.25], [2.5, 16.46], [2.18, 16.32], [2.15, 16.25], [2.25, 16.0], [2.03, 15.47], [1.5, 15.25], [1.25, 15.35], [1.0, 15.25], [0.47, 15.47], [0.32, 15.82], [-0.03, 15.97], [-0.25, 16.5], [-0.03, 17.03], [0.32, 17.18], [0.35, 17.25], [0.25, 17.5], [0.35, 17.75], [0.25, 18.0]]]]}}, "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": {"2022-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 19.25], [2.47, 19.47], [2.25, 20.0], [2.47, 20.53], [3.0, 20.75], [3.25, 20.65], [3.32, 20.68], [3.47, 21.03], [4.0, 21.25], [4.53, 21.03], [4.75, 20.5], [4.53, 19.97], [4.18, 19.82], [4.03, 19.47], [3.5, 19.25], [3.25, 19.35], [3.0, 19.25]]]]}, "2022-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.35, 17.25], [0.25, 17.5], [0.35, 17.75], [0.25, 18.0], [0.47, 18.53], [0.82, 18.68], [0.85, 18.75], [0.75, 19.0], [0.97, 19.53], [1.32, 19.68], [1.47, 20.03], [1.82, 20.18], [1.97, 20.53], [2.5, 20.75], [2.75, 20.65], [3.0, 20.75], [3.25, 20.65], [3.32, 20.68], [3.47, 21.03], [4.0, 21.25], [4.53, 21.03], [4.75, 20.5], [4.53, 19.97], [4.18, 19.82], [4.03, 19.47], [3.68, 19.32], [3.65, 19.25], [3.75, 19.0], [3.53, 18.47], [3.18, 18.32], [3.15, 18.25], [3.25, 18.0], [3.15, 17.75], [3.18, 17.68], [3.53, 17.53], [3.75, 17.0], [3.53, 16.47], [3.0, 16.25], [2.5, 16.46], [2.18, 16.32], [2.15, 16.25], [2.25, 16.0], [2.03, 15.47], [1.5, 15.25], [1.25, 15.35], [1.0, 15.25], [0.47, 15.47], [0.32, 15.82], [-0.03, 15.97], [-0.25, 16.5], [-0.03, 17.03], [0.32, 17.18], [0.35, 17.25]]]]}, "2022-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.35, 17.25], [0.25, 17.5], [0.35, 17.75], [0.25, 18.0], [0.47, 18.53], [0.82, 18.68], [0.85, 18.75], [0.75, 19.0], [0.97, 19.53], [1.32, 19.68], [1.47, 20.03], [1.82, 20.18], [1.97, 20.53], [2.5, 20.75], [2.75, 20.65], [3.0, 20.75], [3.25, 20.65], [3.32, 20.68], [3.47, 21.03], [4.0, 21.25], [4.53, 21.03], [4.75, 20.5], [4.53, 19.97], [4.18, 19.82], [4.03, 19.47], [3.68, 19.32], [3.65, 19.25], [3.75, 19.0], [3.53, 18.47], [3.18, 18.32], [3.15, 18.25], [3.25, 18.0], [3.15, 17.75], [3.18, 17.68], [3.53, 17.53], [3.75, 17.0], [3.53, 16.47], [3.0, 16.25], [2.5, 16.46], [2.18, 16.32], [2.15, 16.25], [2.25, 16.0], [2.03, 15.47], [1.5, 15.25], [1.25, 15.35], [1.0, 15.25], [0.47, 15.47], [0.32, 15.82], [-0.03, 15.97], [-0.25, 16.5], [-0.03, 17.03], [0.32, 17.18], [0.35, 17.25]]]]}, "2022-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.35, 17.25], [0.25, 17.5], [0.35, 17.75], [0.25, 18.0], [0.47, 18.53], [0.82, 18.68], [0.85, 18.75], [0.75, 19.0], [0.97, 19.53], [1.32, 19.68], [1.47, 20.03], [1.82, 20.18], [1.97, 20.53], [2.5, 20.75], [3.0, 20.54], [3.32, 20.68], [3.47, 21.03], [4.0, 21.25], [4.53, 21.03], [4.75, 20.5], [4.53, 19.97], [4.18, 19.82], [4.03, 19.47], [3.68, 19.32], [3.65, 19.25], [3.75, 19.0], [3.53, 18.47], [3.18, 18.32], [3.15, 18.25], [3.25, 18.0], [3.15, 17.75], [3.18, 17.68], [3.53, 17.53], [3.75, 17.0], [3.53, 16.47], [3.0, 16.25], [2.5, 16.46], [2.18, 16.32], [2.15, 16.25], [2.25, 16.0], [2.03, 15.47], [1.5, 15.25], [1.25, 15.35], [1.0, 15.25], [0.47, 15.47], [0.32, 15.82], [-0.03, 15.97], [-0.25, 16.5], [-0.03, 17.03], [0.32, 17.18], [0.35, 17.25]]]]}, "2022-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.75, 17.5], [0.97, 18.03], [1.32, 18.18], [1.35, 18.25], [1.25, 18.5], [1.47, 19.03], [2.0, 19.25], [2.3, 19.13], [2.35, 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12.971573740295185, 14.521132075721141]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2802061624086036, -3.4747615244209316, -3.4732665931112883, -3.2761996495709846, -3.200880807372219]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.508514004058952, -3.808373364033116, -3.915174972577404, -3.726235522430443, -3.307488955203894]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.325995840442543, -1.4520630391775007, -1.4101022992031746, -1.3060352205693653, -1.259773689780484]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3972714611976154, -1.575831673247448, -1.5626562105354413, -1.460917704582813, -1.2949463711577334]}}