{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:40.181883", "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": "2020-Oct-06_to_2020-Oct-09_13.0_12.5"}, "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": 2020100000252}, "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 06 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 09 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": 51268.816961765646}, "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": ["Chad", "Niger", "Nigeria"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 12.5}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[11.354, 12.25], [11.25, 12.5], [11.47, 13.03], [11.823, 13.177], [11.97, 13.53], [12.323, 13.677], [12.47, 14.03], [12.823, 14.177], [12.97, 14.53], [13.5, 14.75], [14.03, 14.53], [14.177, 14.177], [14.53, 14.03], [14.75, 13.5], [14.646, 13.25], [14.75, 13.0], [14.53, 12.47], [14.177, 12.323], [14.03, 11.97], [13.677, 11.823], [13.53, 11.47], [13.0, 11.25], [12.75, 11.354], [12.677, 11.323], [12.53, 10.97], [12.177, 10.823], [12.03, 10.47], [11.5, 10.25], [10.97, 10.47], [10.75, 11.0], [10.97, 11.53], [11.323, 11.677], [11.354, 11.75], [11.25, 12.0], [11.354, 12.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa", "Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[11.323223304703363, 11.676776695296637], [11.353553390593273, 11.75], [11.25, 12.0], [11.353553390593273, 12.25], [11.25, 12.5], [11.469669914110089, 13.030330085889911], [11.823223304703363, 13.176776695296637], [11.969669914110089, 13.530330085889911], [12.5, 13.75], [12.75, 13.646446609406727], [12.823223304703363, 13.676776695296637], [12.853553390593273, 13.75], [12.75, 14.0], [12.969669914110089, 14.530330085889911], [13.5, 14.75], [14.030330085889911, 14.530330085889911], [14.176776695296637, 14.176776695296637], [14.530330085889911, 14.030330085889911], [14.75, 13.5], [14.646446609406727, 13.25], [14.75, 13.0], [14.530330085889911, 12.469669914110089], [14.176776695296637, 12.323223304703363], [14.030330085889911, 11.969669914110089], [13.676776695296637, 11.823223304703363], [13.530330085889911, 11.469669914110089], [13.0, 11.25], [12.75, 11.353553390593273], [12.676776695296637, 11.323223304703363], [12.530330085889911, 10.969669914110089], [12.176776695296637, 10.823223304703363], [12.030330085889911, 10.469669914110089], [11.5, 10.25], [10.969669914110089, 10.469669914110089], [10.75, 11.0], [10.969669914110089, 11.530330085889911], [11.323223304703363, 11.676776695296637]]]}, "2020-10-07T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[11.323223304703363, 11.676776695296637], [11.353553390593273, 11.75], [11.25, 12.0], [11.353553390593273, 12.25], [11.25, 12.5], [11.469669914110089, 13.030330085889911], [11.823223304703363, 13.176776695296637], [11.969669914110089, 13.530330085889911], [12.323223304703363, 13.676776695296637], [12.469669914110089, 14.030330085889911], [12.823223304703363, 14.176776695296637], [12.969669914110089, 14.530330085889911], [13.5, 14.75], [14.030330085889911, 14.530330085889911], [14.176776695296637, 14.176776695296637], [14.530330085889911, 14.030330085889911], [14.75, 13.5], [14.646446609406727, 13.25], [14.75, 13.0], [14.530330085889911, 12.469669914110089], [14.176776695296637, 12.323223304703363], [14.030330085889911, 11.969669914110089], [13.676776695296637, 11.823223304703363], [13.530330085889911, 11.469669914110089], [13.0, 11.25], [12.75, 11.353553390593273], [12.676776695296637, 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entire duration", "value": -3.760890664297733}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.299889130062452}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.633938491635377, 27.564200476423764, 27.735869476804794, 28.97175575533896]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.206161969374534, 25.78019727302609, 25.354713776117762, 28.97175575533896]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.272518285284601, -2.4227747281424183, -2.2580260176223854, -1.3604403906297762]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8165077910967966, -3.760890664297733, -2.886873569783802, -1.3604403906297762]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8345486816478591, -1.9766709824938715, -1.8827453286674853, -1.4366982566690587]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3157474964173064, -2.721600789999423, -2.362142044214043, -1.4366982566690587]}}