{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:38.950731", "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": "2018-May-06_to_2018-May-11_345.5_19.0"}, "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": 2018050000340}, "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 06 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 11 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 326541.3535194973}, "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": ["Mauritania", "Morocco"]}, "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": 19.0}, "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": 345.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 20.25], [-16.25, 20.5], [-16.15, 20.75], [-16.25, 21.0], [-16.03, 21.53], [-15.68, 21.68], [-15.65, 21.75], [-15.75, 22.0], [-15.53, 22.53], [-15.0, 22.75], [-14.75, 22.65], [-14.68, 22.68], [-14.53, 23.03], [-14.0, 23.25], [-13.47, 23.03], [-13.25, 22.5], [-13.35, 22.25], [-13.25, 22.0], [-13.35, 21.75], [-13.25, 21.5], [-13.47, 20.97], [-13.82, 20.82], [-13.85, 20.75], [-13.75, 20.5], [-13.85, 20.25], [-13.75, 20.0], [-13.85, 19.75], [-13.75, 19.5], [-13.85, 19.25], [-13.75, 19.0], [-13.97, 18.47], [-14.5, 18.25], [-14.75, 18.35], [-15.0, 18.25], [-15.53, 18.47], [-15.68, 18.82], [-16.03, 18.97], [-16.25, 19.5], [-16.15, 19.75], [-16.25, 20.0], [-16.15, 20.25]]]]}, "2018-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 20.25], [-16.25, 20.5], [-16.15, 20.75], [-16.25, 21.0], [-16.03, 21.53], [-15.68, 21.68], [-15.65, 21.75], [-15.75, 22.0], [-15.53, 22.53], [-15.0, 22.75], [-14.75, 22.65], [-14.68, 22.68], [-14.53, 23.03], [-14.0, 23.25], [-13.47, 23.03], [-13.25, 22.5], [-13.35, 22.25], [-13.32, 22.18], [-12.97, 22.03], [-12.75, 21.5], [-12.85, 21.25], [-12.75, 21.0], [-12.97, 20.47], [-13.32, 20.32], [-13.35, 20.25], [-13.25, 20.0], [-13.35, 19.75], [-13.25, 19.5], [-13.35, 19.25], [-13.25, 19.0], [-13.47, 18.47], [-14.0, 18.25], [-14.25, 18.35], [-14.5, 18.25], [-14.75, 18.35], [-15.0, 18.25], [-15.53, 18.47], [-15.68, 18.82], [-16.03, 18.97], [-16.25, 19.5], [-16.15, 19.75], [-16.25, 20.0], [-16.15, 20.25]]]]}, "2018-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 20.25], [-16.25, 20.5], [-16.15, 20.75], [-16.25, 21.0], [-16.03, 21.53], [-15.68, 21.68], [-15.65, 21.75], [-15.75, 22.0], [-15.53, 22.53], [-15.0, 22.75], [-14.75, 22.65], [-14.68, 22.68], [-14.53, 23.03], [-14.0, 23.25], [-13.47, 23.03], [-13.25, 22.5], [-13.35, 22.25], [-13.32, 22.18], [-13.0, 22.04], [-12.5, 22.25], [-12.25, 22.15], [-12.0, 22.25], [-11.75, 22.15], [-11.5, 22.25], [-11.25, 22.15], [-11.0, 22.25], [-10.47, 22.03], [-10.32, 21.68], [-10.25, 21.65], [-10.18, 21.68], [-10.03, 22.03], [-9.5, 22.25], [-9.25, 22.15], [-9.0, 22.25], [-8.75, 22.15], [-8.5, 22.25], [-7.97, 22.03], [-7.75, 21.5], [-7.97, 20.97], [-8.5, 20.75], [-8.75, 20.85], [-9.0, 20.75], [-9.25, 20.85], [-9.32, 20.82], [-9.35, 20.75], [-9.25, 20.5], [-9.47, 19.97], [-10.0, 19.75], [-10.25, 19.85], [-10.5, 19.75], [-10.75, 19.85], [-11.0, 19.75], [-11.25, 19.85], [-11.5, 19.75], [-11.75, 19.85], [-11.82, 19.82], [-11.97, 19.47], [-12.5, 19.25], [-12.8, 19.38], [-12.97, 18.97], [-13.32, 18.82], [-13.47, 18.47], [-14.0, 18.25], [-14.25, 18.35], [-14.5, 18.25], [-14.75, 18.35], [-15.0, 18.25], [-15.53, 18.47], [-15.68, 18.82], [-16.03, 18.97], [-16.25, 19.5], [-16.15, 19.75], [-16.25, 20.0], [-16.15, 20.25]]]]}, "2018-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.65, 18.75], [-15.75, 19.0], [-15.65, 19.25], [-15.75, 19.5], [-15.65, 19.75], [-15.75, 20.0], [-15.65, 20.25], [-15.75, 20.5], [-15.53, 21.03], [-15.18, 21.18], [-15.03, 21.53], [-14.68, 21.68], [-14.53, 22.03], [-14.0, 22.25], [-13.75, 22.15], [-13.5, 22.25], [-13.0, 22.04], [-12.5, 22.25], [-12.25, 22.15], [-12.0, 22.25], [-11.75, 22.15], [-11.5, 22.25], [-11.25, 22.15], [-11.0, 22.25], [-10.47, 22.03], [-10.32, 21.68], [-10.25, 21.65], [-10.18, 21.68], [-10.03, 22.03], [-9.5, 22.25], [-9.25, 22.15], [-9.0, 22.25], [-8.75, 22.15], [-8.5, 22.25], [-7.97, 22.03], [-7.75, 21.5], [-7.97, 20.97], [-8.5, 20.75], [-8.75, 20.85], [-9.0, 20.75], [-9.25, 20.85], [-9.32, 20.82], [-9.35, 20.75], [-9.25, 20.5], [-9.47, 19.97], [-9.87, 19.8], [-9.8, 19.62], [-9.5, 19.75], [-9.25, 19.65], [-9.18, 19.68], [-9.03, 20.03], [-8.5, 20.25], [-8.25, 20.15], [-8.0, 20.25], [-7.75, 20.15], [-7.5, 20.25], [-6.97, 20.03], [-6.75, 19.5], [-6.85, 19.25], [-6.75, 19.0], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-8.0, 18.25], [-8.25, 18.35], [-8.5, 18.25], [-8.75, 18.35], [-8.82, 18.32], [-8.85, 18.25], [-8.75, 18.0], [-8.97, 17.47], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.32, 17.32], [-10.46, 17.0], [-10.25, 16.5], [-10.47, 15.97], [-10.82, 15.82], [-10.97, 15.47], [-11.5, 15.25], [-12.03, 15.47], [-12.2, 15.88], [-12.5, 15.75], [-12.75, 15.85], [-13.0, 15.75], [-13.25, 15.85], [-13.5, 15.75], [-14.03, 15.97], [-14.18, 16.32], [-14.25, 16.35], [-14.5, 16.25], [-15.03, 16.47], [-15.25, 17.0], [-15.15, 17.25], [-15.18, 17.32], [-15.53, 17.47], [-15.75, 18.0], [-15.65, 18.25], [-15.75, 18.5], [-15.65, 18.75]], [[-10.62, 18.8], [-10.75, 18.85], [-11.0, 18.75], [-10.75, 18.65], [-10.68, 18.68], [-10.62, 18.8]], [[-11.25, 18.85], [-11.32, 18.82], [-11.37, 18.7], [-11.25, 18.65], [-11.0, 18.75], [-11.25, 18.85]]]]}, "2018-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.65, 18.75], [-15.75, 19.0], [-15.65, 19.25], [-15.75, 19.5], [-15.65, 19.75], [-15.75, 20.0], [-15.65, 20.25], [-15.75, 20.5], [-15.53, 21.03], [-15.0, 21.25], [-14.75, 21.15], [-14.5, 21.25], [-14.25, 21.15], [-14.18, 21.18], [-14.03, 21.53], [-13.5, 21.75], [-13.25, 21.65], [-13.18, 21.68], [-13.03, 22.03], [-12.5, 22.25], [-12.25, 22.15], [-12.0, 22.25], [-11.75, 22.15], [-11.5, 22.25], [-11.25, 22.15], [-11.0, 22.25], [-10.47, 22.03], [-10.32, 21.68], [-10.25, 21.65], [-10.18, 21.68], [-10.03, 22.03], [-9.5, 22.25], [-9.25, 22.15], [-9.0, 22.25], [-8.75, 22.15], [-8.5, 22.25], [-7.97, 22.03], [-7.75, 21.5], [-7.97, 20.97], [-8.5, 20.75], [-8.75, 20.85], [-9.0, 20.75], [-9.25, 20.85], [-9.32, 20.82], [-9.35, 20.75], [-9.25, 20.5], [-9.47, 19.97], [-9.87, 19.8], [-9.8, 19.62], [-9.5, 19.75], [-9.25, 19.65], [-9.18, 19.68], [-9.03, 20.03], [-8.5, 20.25], [-8.25, 20.15], [-8.0, 20.25], [-7.75, 20.15], [-7.5, 20.25], [-6.97, 20.03], [-6.75, 19.5], [-6.85, 19.25], [-6.75, 19.0], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-8.0, 18.25], [-8.25, 18.35], [-8.5, 18.25], [-8.75, 18.35], [-8.82, 18.32], [-8.85, 18.25], [-8.75, 18.0], [-8.97, 17.47], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.32, 17.32], [-10.46, 17.0], [-10.25, 16.5], [-10.47, 15.97], [-10.82, 15.82], [-10.97, 15.47], [-11.5, 15.25], [-12.03, 15.47], [-12.2, 15.88], [-12.5, 15.75], [-12.75, 15.85], [-13.0, 15.75], [-13.25, 15.85], [-13.5, 15.75], [-14.03, 15.97], [-14.18, 16.32], [-14.25, 16.35], [-14.5, 16.25], [-15.03, 16.47], [-15.25, 17.0], [-15.15, 17.25], [-15.18, 17.32], [-15.53, 17.47], [-15.75, 18.0], [-15.65, 18.25], [-15.75, 18.5], [-15.65, 18.75]], [[-10.62, 18.8], [-10.75, 18.85], [-11.0, 18.75], [-10.75, 18.65], [-10.68, 18.68], [-10.62, 18.8]], [[-11.25, 18.85], [-11.32, 18.82], [-11.37, 18.7], [-11.25, 18.65], [-11.0, 18.75], [-11.25, 18.85]]]]}, "2018-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.65, 18.75], [-15.75, 19.0], [-15.53, 19.53], [-15.0, 19.75], [-14.75, 19.65], [-14.5, 19.75], [-14.25, 19.65], [-14.18, 19.68], [-14.03, 20.03], [-13.5, 20.25], [-13.25, 20.15], [-13.0, 20.25], [-12.5, 20.04], [-12.18, 20.18], [-12.03, 20.53], [-11.5, 20.75], [-10.97, 20.53], [-10.82, 20.18], [-10.75, 20.15], [-10.5, 20.25], [-9.97, 20.03], [-9.8, 19.62], [-9.5, 19.75], [-9.25, 19.65], [-9.18, 19.68], [-9.03, 20.03], [-8.5, 20.25], [-8.25, 20.15], [-8.0, 20.25], [-7.75, 20.15], [-7.5, 20.25], [-6.97, 20.03], [-6.75, 19.5], [-6.85, 19.25], [-6.75, 19.0], [-6.97, 18.47], [-7.5, 18.25], [-7.75, 18.35], [-8.0, 18.25], [-8.25, 18.35], [-8.5, 18.25], [-8.75, 18.35], [-8.82, 18.32], [-8.85, 18.25], [-8.75, 18.0], [-8.97, 17.47], [-9.5, 17.25], [-9.75, 17.35], [-10.0, 17.25], [-10.25, 17.35], [-10.32, 17.32], [-10.46, 17.0], [-10.25, 16.5], [-10.47, 15.97], [-10.82, 15.82], [-10.97, 15.47], [-11.5, 15.25], [-12.03, 15.47], [-12.2, 15.88], [-12.5, 15.75], [-12.75, 15.85], [-13.0, 15.75], [-13.25, 15.85], [-13.5, 15.75], [-14.03, 15.97], [-14.18, 16.32], [-14.25, 16.35], [-14.5, 16.25], [-15.03, 16.47], [-15.25, 17.0], [-15.15, 17.25], [-15.18, 17.32], [-15.53, 17.47], [-15.75, 18.0], [-15.65, 18.25], [-15.75, 18.5], [-15.65, 18.75]], [[-10.62, 18.8], [-10.75, 18.85], [-11.0, 18.75], [-10.75, 18.65], [-10.68, 18.68], [-10.62, 18.8]], [[-11.25, 18.85], [-11.32, 18.82], [-11.37, 18.7], [-11.25, 18.65], [-11.0, 18.75], [-11.25, 18.85]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.481506959345666}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.424157687599163}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.970764100560075, 24.592452440927957, 24.797265280692557, 27.052738071364388, 27.09706704325845, 29.722024533865465]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.088266553930225, 21.44425409166928, 22.149614932869554, 21.833470282565997, 22.62269016550306, 25.901303104317265]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.486083570936133, -4.425305408675224, -4.39716119992397, -4.620131207648584, -4.829320210914792, -3.4877155260114234]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.024431776170047, -4.855392166709237, -5.530098533082764, -6.481506959345666, -6.265058282570294, -4.767037660643609]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4822525402987163, -1.4525392354290279, -1.4081996429316608, -1.8192021210042943, -1.972108636918072, -1.6267594865209154]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6488001648302935, -1.5422759327534261, -1.5516477398369584, -2.3013910322782793, -2.5976010163785426, -2.2283645139472448]}}