{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:17:57.048652", "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-Aug-29_to_2020-Sep-01_355.0_21.5"}, "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": 2020080000991}, "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": "August 29 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 01 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": 62933.93242452157}, "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": 21.5}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 355.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 357.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-5.177, 22.677], [-5.03, 23.03], [-4.677, 23.177], [-4.53, 23.53], [-4.177, 23.677], [-4.03, 24.03], [-3.677, 24.177], [-3.53, 24.53], [-3.0, 24.75], [-2.47, 24.53], [-2.25, 24.0], [-2.354, 23.75], [-2.25, 23.5], [-2.354, 23.25], [-2.25, 23.0], [-2.354, 22.75], [-2.25, 22.5], [-2.354, 22.25], [-2.25, 22.0], [-2.354, 21.75], [-2.25, 21.5], [-2.47, 20.97], [-3.0, 20.75], [-3.25, 20.854], [-3.5, 20.75], [-3.75, 20.854], [-3.823, 20.823], [-3.97, 20.47], [-4.5, 20.25], [-4.75, 20.354], [-5.0, 20.25], [-5.53, 20.47], [-5.75, 21.0], [-5.646, 21.25], [-5.75, 21.5], [-5.646, 21.75], [-5.75, 22.0], [-5.53, 22.53], [-5.177, 22.677]]]}}, "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": {"2020-08-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-5.646446609406723, 21.25], [-5.75, 21.5], [-5.5303300858898865, 22.03033008588991], [-5.17677669529661, 22.17677669529664], [-5.146446609406723, 22.25], [-5.25, 22.5], 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"coordinates": [[[-5.646446609406723, 21.25], [-5.75, 21.5], [-5.646446609406723, 21.75], [-5.75, 22.0], [-5.5303300858898865, 22.53033008588991], [-5.17677669529661, 22.67677669529664], [-5.0303300858898865, 23.03033008588991], [-4.67677669529661, 23.17677669529664], [-4.5303300858898865, 23.53033008588991], [-4.17677669529661, 23.67677669529664], [-4.0303300858898865, 24.03033008588991], [-3.67677669529661, 24.17677669529664], [-3.5303300858898865, 24.53033008588991], [-3.0, 24.75], [-2.4696699141101135, 24.53033008588991], [-2.25, 24.0], [-2.3535533905932766, 23.75], [-2.25, 23.5], [-2.3535533905932766, 23.25], [-2.25, 23.0], [-2.3535533905932766, 22.75], [-2.25, 22.5], [-2.3535533905932766, 22.25], [-2.25, 22.0], [-2.3535533905932766, 21.75], [-2.25, 21.5], [-2.4696699141101135, 20.96966991411009], [-3.0, 20.75], [-3.25, 20.853553390593277], [-3.5, 20.75], [-3.75, 20.853553390593277], [-3.82322330470339, 20.82322330470336], [-3.9696699141101135, 20.46966991411009], [-4.5, 20.25], 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-3.195573882564261}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [34.17851773940083, 32.28472517703182, 32.57618003127317, 34.090196846943854]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [32.86853849307698, 30.50496466187593, 30.667312820598625, 33.96877044744605]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0520100535037797, -3.9462546464806576, -3.6326211316340005, -2.137985944851806]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.765796673395812, -5.1247748493134395, -5.460167961051809, -2.2398327190076657]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5936616695952712, -3.111996750572935, -2.88881064237403, -1.5954404820320573]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0768979860970522, -3.7095761833554857, -3.7851064008476842, -1.620147514110503]}}