{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:03.543817", "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": "2019-Dec-31_to_2020-Jan-03_6.0_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": 2019120000824}, "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": "December 31 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 67669.23215992184}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 6.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 24.0], [3.97, 24.53], [4.5, 24.75], [4.75, 24.65], [4.82, 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[7.97, 26.03], [8.5, 26.25], [9.03, 26.03], [9.18, 25.68], [9.53, 25.53], [9.75, 25.0], [9.53, 24.47], [9.0, 24.25], [8.75, 24.35], [8.63, 24.3], [8.75, 24.0], [8.53, 23.47], [8.0, 23.25], [7.75, 23.35], [7.68, 23.32], [7.53, 22.97], [7.0, 22.75], [6.75, 22.85], [6.68, 22.82], [6.53, 22.47], [6.0, 22.25], [5.47, 22.47], [5.32, 22.82], [5.25, 22.85], [5.0, 22.75], [4.47, 22.97], [4.32, 23.32], [3.97, 23.47], [3.75, 24.0]]]]}, "2020-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 24.0], [3.97, 24.53], [4.5, 24.75], [4.75, 24.65], [4.82, 24.68], [4.85, 24.75], [4.75, 25.0], [4.97, 25.53], [5.5, 25.75], [6.03, 25.53], [6.18, 25.18], [6.25, 25.15], [6.5, 25.25], [6.75, 25.15], [7.0, 25.25], [7.25, 25.15], [7.32, 25.18], [7.47, 25.53], [7.82, 25.68], [7.97, 26.03], [8.5, 26.25], [9.03, 26.03], [9.18, 25.68], [9.53, 25.53], [9.75, 25.0], [9.53, 24.47], [9.0, 24.25], [8.75, 24.35], [8.63, 24.3], [8.75, 24.0], [8.53, 23.47], [8.0, 23.25], [7.75, 23.35], [7.68, 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t2m.", "value": [3.639426629937759, 1.6987048535795566, 3.912452502237045, 7.019518580970896]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.177556323773795, -6.048745182060277, -4.428151039905515, -3.8663045426409326]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.4692152849734725, -7.402100713706147, -5.442774755076584, -3.8663045426409326]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8024687578138134, -2.0391328776932487, -1.4526228965960273, -1.394685824199585]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0252693514298623, -2.5196514857498773, -1.8002104517595217, -1.394685824199585]}}