{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:06.286596", "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": "2021-Apr-04_to_2021-Apr-08_46.0_15.5"}, "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": 2021040000242}, "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": "April 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 08 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 70849.69496832904}, "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": ["Saudi Arabia", "Yemen"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 15.5}, "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": 46.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.97, 20.03], [44.5, 20.25], [45.03, 20.03], [45.18, 19.68], [45.53, 19.53], [45.75, 19.0], [45.65, 18.75], [45.75, 18.5], [45.53, 17.97], [45.0, 17.75], [44.47, 17.97], [44.32, 18.32], [43.97, 18.47], [43.75, 19.0], [43.85, 19.25], [43.75, 19.5], [43.97, 20.03]]]]}, "2021-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.97, 20.03], [44.5, 20.25], [45.03, 20.03], [45.18, 19.68], [45.53, 19.53], [45.68, 19.18], [46.03, 19.03], [46.18, 18.68], [46.53, 18.53], [46.68, 18.18], [47.03, 18.03], [47.25, 17.5], [47.15, 17.25], [47.25, 17.0], [47.03, 16.47], [46.68, 16.32], [46.65, 16.25], [46.75, 16.0], [46.65, 15.75], [46.75, 15.5], [46.65, 15.25], [46.75, 15.0], [46.53, 14.47], [46.0, 14.25], [45.47, 14.47], [45.32, 14.82], [44.97, 14.97], [44.82, 15.32], [44.47, 15.47], [44.32, 15.82], [43.97, 15.97], [43.75, 16.5], [43.97, 17.03], [44.38, 17.2], [44.25, 17.5], [44.35, 17.75], [44.25, 18.0], [44.35, 18.25], [44.32, 18.32], [43.97, 18.47], [43.75, 19.0], [43.85, 19.25], [43.75, 19.5], [43.97, 20.03]]]]}, "2021-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.97, 20.03], [44.5, 20.25], [45.03, 20.03], [45.18, 19.68], [45.53, 19.53], [45.68, 19.18], [46.03, 19.03], [46.18, 18.68], [46.53, 18.53], [46.68, 18.18], [47.03, 18.03], [47.25, 17.5], [47.15, 17.25], [47.25, 17.0], [47.03, 16.47], [46.68, 16.32], [46.65, 16.25], [46.75, 16.0], [46.65, 15.75], [46.75, 15.5], [46.65, 15.25], [46.75, 15.0], [46.53, 14.47], [46.0, 14.25], [45.47, 14.47], [45.32, 14.82], [44.97, 14.97], [44.82, 15.32], [44.47, 15.47], [44.32, 15.82], [43.97, 15.97], [43.75, 16.5], [43.97, 17.03], [44.38, 17.2], [44.25, 17.5], [44.35, 17.75], [44.25, 18.0], [44.35, 18.25], [44.32, 18.32], [43.97, 18.47], [43.75, 19.0], [43.85, 19.25], [43.75, 19.5], [43.97, 20.03]]]]}, "2021-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.75, 16.5], [43.97, 17.03], [44.38, 17.2], [44.25, 17.5], [44.35, 17.75], [44.25, 18.0], [44.35, 18.25], [44.25, 18.5], [44.35, 18.75], [44.25, 19.0], [44.47, 19.53], [45.0, 19.75], [45.53, 19.53], [45.68, 19.18], [46.03, 19.03], [46.18, 18.68], [46.53, 18.53], [46.68, 18.18], [47.03, 18.03], [47.25, 17.5], [47.15, 17.25], [47.25, 17.0], [47.03, 16.47], [46.68, 16.32], [46.65, 16.25], [46.75, 16.0], [46.65, 15.75], [46.75, 15.5], [46.65, 15.25], [46.75, 15.0], [46.53, 14.47], [46.0, 14.25], [45.47, 14.47], [45.32, 14.82], [44.97, 14.97], [44.82, 15.32], [44.47, 15.47], [44.32, 15.82], [43.97, 15.97], [43.75, 16.5]]]]}, "2021-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 14.97], [44.75, 15.5], [44.97, 16.03], [45.5, 16.25], [45.75, 16.15], [46.0, 16.25], [46.53, 16.03], [46.75, 15.5], [46.53, 14.97], [46.0, 14.75], [45.75, 14.85], [45.5, 14.75], [44.97, 14.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.401867884043725}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3874545879500895}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.796620938797332, 23.583091697034092, 23.455734714566972, 24.210372523029264, 25.494116428788686]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.15943660651584, 21.654698639884657, 21.134885791419663, 21.746616765527904, 25.16946531975708]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5308355093210935, -3.4566836578139495, -3.6898446469988735, -3.041919018597936, -2.4421544611300305]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8697334152898293, -4.401867884043725, -4.280809281037591, -3.6561237594382874, -2.6199534681738896]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4235817776710424, -1.7399669082837814, -1.8868109523981742, -1.564567849864178, -1.4264554899742572]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.460142907337372, -2.1596103144442127, -2.1470101289393617, -1.931768420666502, -1.441042436188249]}}