{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:07.668615", "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": "2015-Jun-02_to_2015-Jun-07_344.5_20.5"}, "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": 2015060000132}, "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": "June 02 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 07 2015"}, "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": 83982.17486783153}, "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": ["North Atlantic Ocean"]}, "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": 20.5}, "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": 344.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "344.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 341.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 345.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.75}, "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": {"2015-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.5, 23.25], [-14.97, 23.03], [-14.75, 22.5], [-14.97, 21.97], [-15.5, 21.75], [-16.03, 21.97], [-16.25, 22.5], [-16.03, 23.03], [-15.5, 23.25]]]]}, "2015-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.0, 23.25], [-15.75, 23.15], [-15.5, 23.25], [-14.97, 23.03], [-14.75, 22.5], [-14.85, 22.25], [-14.75, 22.0], [-14.85, 21.75], [-14.75, 21.5], [-14.85, 21.25], [-14.82, 21.18], [-14.47, 21.03], [-14.25, 20.5], [-14.35, 20.25], [-14.25, 20.0], [-14.47, 19.47], [-15.0, 19.25], [-15.53, 19.47], [-15.68, 19.82], [-15.75, 19.85], [-16.0, 19.75], [-16.53, 19.97], [-16.68, 20.32], [-16.75, 20.35], [-17.0, 20.25], [-17.53, 20.47], [-17.75, 21.0], [-17.53, 21.53], [-17.18, 21.68], [-17.15, 21.75], [-17.25, 22.0]]]]}, "2015-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.53, 17.97], [-18.75, 18.5], [-18.53, 19.03], [-18.0, 19.25], [-17.75, 19.15], [-17.68, 19.18], [-17.65, 19.25], [-17.75, 19.5], [-17.54, 20.0], [-17.75, 20.5], [-17.65, 20.75], [-17.75, 21.0], [-17.53, 21.53], [-17.18, 21.68], [-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.0, 23.25], [-15.75, 23.15], [-15.5, 23.25], [-14.97, 23.03], [-14.75, 22.5], [-14.85, 22.25], [-14.75, 22.0], [-14.85, 21.75], [-14.75, 21.5], [-14.85, 21.25], [-14.82, 21.18], [-14.47, 21.03], [-14.25, 20.5], [-14.35, 20.25], [-14.25, 20.0], [-14.47, 19.47], [-14.82, 19.32], [-14.97, 18.97], [-15.5, 18.75], [-15.75, 18.85], [-16.0, 18.75], [-16.3, 18.88], [-16.47, 18.47], [-16.82, 18.32], [-16.97, 17.97], [-17.5, 17.75], [-17.75, 17.85], [-18.0, 17.75], [-18.53, 17.97]]]]}, "2015-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.53, 19.03], [-18.0, 19.25], [-17.75, 19.15], [-17.68, 19.18], [-17.65, 19.25], [-17.75, 19.5], [-17.54, 20.0], [-17.75, 20.5], [-17.65, 20.75], [-17.75, 21.0], [-17.53, 21.53], [-17.18, 21.68], [-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.0, 23.25], [-15.75, 23.15], [-15.5, 23.25], [-14.97, 23.03], [-14.75, 22.5], [-14.85, 22.25], [-14.75, 22.0], [-14.85, 21.75], [-14.75, 21.5], [-14.85, 21.25], [-14.82, 21.18], [-14.47, 21.03], [-14.25, 20.5], [-14.35, 20.25], [-14.25, 20.0], [-14.47, 19.47], [-14.82, 19.32], [-14.97, 18.97], [-15.5, 18.75], [-15.75, 18.85], [-16.0, 18.75], [-16.3, 18.88], [-16.47, 18.47], [-16.82, 18.32], [-16.85, 18.25], [-16.75, 18.0], [-16.97, 17.47], [-17.5, 17.25], [-17.75, 17.35], [-18.0, 17.25], [-18.53, 17.47], [-18.75, 18.0], [-18.65, 18.25], [-18.75, 18.5], [-18.53, 19.03]]]]}, "2015-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.53, 19.03], [-18.0, 19.25], [-17.75, 19.15], [-17.68, 19.18], [-17.65, 19.25], [-17.75, 19.5], [-17.54, 20.0], [-17.75, 20.5], [-17.65, 20.75], [-17.75, 21.0], [-17.53, 21.53], [-17.0, 21.75], [-16.7, 21.62], [-16.65, 21.75], [-16.75, 22.0], [-16.53, 22.53], [-16.18, 22.68], [-16.03, 23.03], [-15.5, 23.25], [-14.97, 23.03], [-14.75, 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.4191709162422956}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.552215966483857, 23.52530911718202, 23.240602077317135, 22.609063787331877, 23.360882953572002, 20.21888389949669]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.552215966483857, 19.51558891292774, 19.109939930348162, 19.105395513680094, 19.232400000560858, 19.940292554869984]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2261862874843246, -3.920934380085285, -3.222595793774202, -3.652173623557705, -3.303926667129576, -1.2846126594355571]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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