{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:21.306563", "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": "2019-Mar-30_to_2019-Apr-02_355.0_24.5"}, "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": 2019030000798}, "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": "March 30 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 2019"}, "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": 96293.97043006949}, "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", "Mauritania"]}, "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": 24.5}, "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": 350.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 21.97], [-9.75, 22.5], [-9.53, 23.03], [-9.0, 23.25], [-8.75, 23.15], [-8.68, 23.18], [-8.53, 23.53], [-8.18, 23.68], [-8.03, 24.03], [-7.5, 24.25], [-6.97, 24.03], [-6.75, 23.5], [-6.97, 22.97], [-7.32, 22.82], [-7.35, 22.75], [-7.25, 22.5], [-7.47, 21.97], [-8.0, 21.75], [-8.25, 21.85], [-8.5, 21.75], [-8.75, 21.85], [-9.0, 21.75], [-9.53, 21.97]]]]}, "2019-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 21.97], [-9.75, 22.5], [-9.53, 23.03], [-9.0, 23.25], [-8.75, 23.15], [-8.68, 23.18], [-8.53, 23.53], [-8.18, 23.68], [-8.03, 24.03], [-7.5, 24.25], [-7.25, 24.15], [-7.0, 24.25], [-6.75, 24.15], [-6.68, 24.18], [-6.53, 24.53], [-6.18, 24.68], [-6.03, 25.03], [-5.68, 25.18], [-5.53, 25.53], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.75, 25.65], [-3.5, 25.75], [-2.97, 25.53], [-2.75, 25.0], [-2.85, 24.75], [-2.75, 24.5], [-2.97, 23.97], [-3.32, 23.82], [-3.35, 23.75], [-3.25, 23.5], [-3.47, 22.97], [-4.0, 22.75], [-4.25, 22.85], [-4.5, 22.75], [-4.75, 22.85], [-5.0, 22.75], [-5.25, 22.85], [-5.32, 22.82], [-5.47, 22.47], [-5.82, 22.32], [-5.97, 21.97], [-6.5, 21.75], [-6.75, 21.85], [-6.82, 21.82], [-6.97, 21.47], [-7.5, 21.25], [-8.03, 21.47], [-8.18, 21.82], [-8.25, 21.85], [-8.5, 21.75], [-8.75, 21.85], [-9.0, 21.75], [-9.53, 21.97]]]]}, "2019-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 21.97], [-9.75, 22.5], [-9.53, 23.03], [-9.0, 23.25], [-8.75, 23.15], [-8.68, 23.18], [-8.53, 23.53], [-8.18, 23.68], [-8.03, 24.03], [-7.5, 24.25], [-7.25, 24.15], [-7.0, 24.25], [-6.75, 24.15], [-6.68, 24.18], [-6.53, 24.53], [-6.18, 24.68], [-6.03, 25.03], [-5.68, 25.18], [-5.53, 25.53], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.75, 25.65], [-3.5, 25.75], [-2.97, 25.53], [-2.75, 25.0], [-2.85, 24.75], [-2.75, 24.5], [-2.97, 23.97], [-3.32, 23.82], [-3.35, 23.75], [-3.25, 23.5], [-3.47, 22.97], [-4.0, 22.75], [-4.25, 22.85], [-4.5, 22.75], [-4.75, 22.85], [-5.0, 22.75], [-5.25, 22.85], [-5.32, 22.82], [-5.47, 22.47], [-5.82, 22.32], [-5.97, 21.97], [-6.5, 21.75], [-6.75, 21.85], [-6.82, 21.82], [-6.97, 21.47], [-7.5, 21.25], [-8.03, 21.47], [-8.18, 21.82], [-8.25, 21.85], [-8.5, 21.75], [-8.75, 21.85], [-9.0, 21.75], [-9.53, 21.97]]]]}, "2019-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.15, 22.75], [-8.25, 23.0], [-8.03, 23.53], [-7.68, 23.68], [-7.53, 24.03], [-7.0, 24.25], [-6.75, 24.15], [-6.68, 24.18], [-6.53, 24.53], [-6.18, 24.68], [-6.03, 25.03], [-5.68, 25.18], [-5.53, 25.53], [-5.0, 25.75], [-4.75, 25.65], [-4.5, 25.75], [-4.25, 25.65], [-4.0, 25.75], [-3.75, 25.65], [-3.5, 25.75], [-2.97, 25.53], [-2.75, 25.0], [-2.85, 24.75], [-2.75, 24.5], [-2.97, 23.97], [-3.32, 23.82], [-3.35, 23.75], [-3.25, 23.5], [-3.47, 22.97], [-4.0, 22.75], [-4.25, 22.85], [-4.5, 22.75], [-4.75, 22.85], [-5.0, 22.75], [-5.25, 22.85], [-5.32, 22.82], [-5.47, 22.47], [-5.82, 22.32], [-5.97, 21.97], [-6.5, 21.75], [-6.75, 21.85], [-6.82, 21.82], [-6.97, 21.47], [-7.5, 21.25], [-8.03, 21.47], [-8.25, 22.0], [-8.15, 22.25], [-8.25, 22.5], [-8.15, 22.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.276177048762861}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.667747966630657}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.106057879917216, 19.748893407632124, 18.477721968162655, 20.618092484154715]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.99309761525035, 18.875766671154167, 17.882220112951188, 19.957993760403326]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2828405321684615, -5.459314367801854, -6.784265075965968, -4.669461684392369]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.511327430664039, -6.485212752629764, -7.276177048762861, -5.3263265280852465]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5252245261472501, -1.723540577808845, -2.188384816215215, -1.51103694018786]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5937299655038417, -1.9995579886819654, -2.3345451281704532, -1.7174841585322926]}}