{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:17:04.024789", "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-Jul-11_to_2020-Jul-14_354.0_17.0"}, "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": 2020070000465}, "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": "July 11 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 14 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": 115302.18116856931}, "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": ["Mali", "Mauritania"]}, "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": 17.0}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.0}, "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": 18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-10.5, 17.75], [-10.251, 17.646], [-10.25, 17.646], [-10.177, 17.677], [-10.03, 18.03], [-9.5, 18.25], [-9.25, 18.146], 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-10.67677669529661, 15.823223304703363], [-11.030330085889887, 15.969669914110089], [-11.25, 16.5], [-11.030330085889887, 17.03033008588991], [-10.67677669529661, 17.17677669529664], [-10.530330085889887, 17.53033008588991], [-10.17677669529661, 17.67677669529664], [-10.030330085889887, 18.03033008588991], [-9.5, 18.25], [-9.25, 18.146446609406723], [-9.17677669529661, 18.17677669529664], [-9.030330085889887, 18.53033008588991], [-8.67677669529661, 18.67677669529664], [-8.530330085889887, 19.03033008588991], [-8.0, 19.25], [-7.4696699141101135, 19.03033008588991], [-7.25, 18.5], [-7.353553390593277, 18.25], [-7.32322330470339, 18.17677669529664], [-7.25, 18.146446609406723], [-7.0, 18.25], [-6.75, 18.146446609406723], [-6.5, 18.25], [-6.25, 18.146446609406723], [-6.0, 18.25], [-5.75, 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"description": "Mean t2m anomaly over entire duration", "value": -3.3073370794124513}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.3134075666307, 29.73615310715371, 30.46981231488911, 30.511316933361968]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.25358888004041, 28.816503659771968, 28.841334409245462, 29.638621059008017]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2479174325336917, -3.8051642013885294, -3.039082001641109, -2.9885102630985547]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.411183119880434, -4.6340424810261425, -4.183670519870873, -3.881977927830519]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", 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