{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:06.614073", "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": "2025-May-24_to_2025-May-26_4.5_32.0"}, "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": 2025050000581}, "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": "May 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 26 2025"}, "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": 108791.24099006168}, "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": 32.0}, "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": 4.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.5\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": 9.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[1.75, 31.0], [1.97, 31.53], [2.5, 31.75], [2.75, 31.65], [2.82, 31.68], [2.97, 32.03], [3.5, 32.25], [3.75, 32.15], [3.82, 32.18], [3.97, 32.53], [4.5, 32.75], [5.03, 32.53], [5.18, 32.18], [5.53, 32.03], [5.68, 31.68], [5.75, 31.65], [5.82, 31.68], [5.97, 32.03], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.85, 32.25], [6.75, 32.5], [6.97, 33.03], [7.5, 33.25], [8.03, 33.03], [8.25, 32.5], [8.15, 32.25], [8.18, 32.18], [8.25, 32.15], [8.5, 32.25], [8.75, 32.15], [9.0, 32.25], [9.53, 32.03], [9.75, 31.5], [9.53, 30.97], [9.0, 30.75], [8.75, 30.85], [8.68, 30.82], [8.65, 30.75], [8.75, 30.5], [8.53, 29.97], [8.18, 29.82], [8.03, 29.47], [7.5, 29.25], [7.2, 29.38], [7.03, 28.97], [6.5, 28.75], [6.0, 28.96], [5.5, 28.75], [4.97, 28.97], [4.82, 29.32], [4.75, 29.35], [4.5, 29.25], [3.97, 29.47], [3.82, 29.82], [3.75, 29.85], [3.5, 29.75], [2.97, 29.97], [2.82, 30.32], [2.75, 30.35], [2.5, 30.25], [1.97, 30.47], [1.75, 31.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.5, 30.25], [1.97, 30.47], [1.75, 31.0], [1.97, 31.53], [2.5, 31.75], [2.75, 31.65], [2.82, 31.68], [2.97, 32.03], [3.5, 32.25], [3.75, 32.15], [3.82, 32.18], [3.97, 32.53], [4.5, 32.75], [5.03, 32.53], [5.18, 32.18], [5.53, 32.03], [5.68, 31.68], [5.75, 31.65], [5.82, 31.68], [5.97, 32.03], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.85, 32.25], [6.75, 32.5], [6.97, 33.03], [7.5, 33.25], [8.03, 33.03], [8.25, 32.5], [8.15, 32.25], [8.18, 32.18], [8.25, 32.15], [8.5, 32.25], [8.75, 32.15], [9.0, 32.25], [9.53, 32.03], [9.75, 31.5], [9.53, 30.97], [9.0, 30.75], [8.75, 30.85], [8.68, 30.82], [8.65, 30.75], [8.75, 30.5], [8.53, 29.97], [8.18, 29.82], [8.03, 29.47], [7.5, 29.25], [7.2, 29.38], [7.03, 28.97], [6.5, 28.75], [6.0, 28.96], [5.5, 28.75], [4.97, 28.97], [4.82, 29.32], [4.75, 29.35], [4.5, 29.25], [3.97, 29.47], [3.82, 29.82], [3.75, 29.85], [3.5, 29.75], [2.97, 29.97], [2.82, 30.32], [2.75, 30.35], [2.5, 30.25]]]]}, "2025-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.5, 30.25], [1.97, 30.47], [1.75, 31.0], [1.97, 31.53], [2.5, 31.75], [2.75, 31.65], [2.82, 31.68], [2.97, 32.03], [3.5, 32.25], [3.75, 32.15], [3.82, 32.18], [3.97, 32.53], [4.5, 32.75], [5.03, 32.53], [5.18, 32.18], [5.53, 32.03], [5.68, 31.68], [5.75, 31.65], [5.82, 31.68], [5.97, 32.03], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.85, 32.25], [6.75, 32.5], [6.97, 33.03], [7.5, 33.25], [8.03, 33.03], [8.25, 32.5], [8.15, 32.25], [8.18, 32.18], [8.25, 32.15], [8.5, 32.25], [8.75, 32.15], [9.0, 32.25], [9.53, 32.03], [9.75, 31.5], [9.53, 30.97], [9.0, 30.75], [8.75, 30.85], [8.68, 30.82], [8.65, 30.75], [8.75, 30.5], [8.53, 29.97], [8.18, 29.82], [8.03, 29.47], [7.5, 29.25], [7.2, 29.38], [7.03, 28.97], [6.5, 28.75], [6.0, 28.96], [5.5, 28.75], [4.97, 28.97], [4.82, 29.32], [4.75, 29.35], [4.5, 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{"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.012222420587591, -7.7293211281046865, -5.897685986619194]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.588899130331107, -2.0093384102280862, -1.495870649645866]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.090038403536426, -2.2178287635308185, -1.7005715428371684]}}