{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:55.368488", "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-Jun-17_to_2018-Jun-22_353.5_6.0"}, "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": 2018060000668}, "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 17 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 22 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": 83064.89268863414}, "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": ["C\u00f4te d'Ivoire", "Liberia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": ["Gulf of Guinea"]}, "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": 6.0}, "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": 353.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.5\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": 356.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 4.97], [-9.75, 5.5], [-9.53, 6.03], [-9.0, 6.25], [-8.75, 6.15], [-8.5, 6.25], [-8.25, 6.15], [-8.18, 6.18], [-8.03, 6.53], [-7.5, 6.75], [-7.25, 6.65], [-7.0, 6.75], [-6.75, 6.65], [-6.5, 6.75], [-6.25, 6.65], [-6.18, 6.68], [-6.03, 7.03], [-5.5, 7.25], [-4.97, 7.03], [-4.82, 6.68], [-4.47, 6.53], [-4.32, 6.18], [-4.25, 6.15], [-4.0, 6.25], [-3.47, 6.03], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.25, 4.85], [-4.32, 4.82], [-4.47, 4.47], [-5.0, 4.25], [-5.25, 4.35], [-5.5, 4.25], [-5.75, 4.35], [-6.0, 4.25], [-6.25, 4.35], [-6.5, 4.25], [-6.75, 4.35], [-7.0, 4.25], [-7.25, 4.35], [-7.5, 4.25], [-7.75, 4.35], [-8.0, 4.25], [-8.53, 4.47], [-8.68, 4.82], [-8.75, 4.85], [-9.0, 4.75], [-9.53, 4.97]]]]}, "2018-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 4.97], [-9.75, 5.5], [-9.53, 6.03], [-9.0, 6.25], [-8.75, 6.15], [-8.5, 6.25], [-8.25, 6.15], [-8.18, 6.18], [-8.03, 6.53], [-7.5, 6.75], [-7.25, 6.65], [-7.0, 6.75], [-6.75, 6.65], [-6.5, 6.75], [-6.25, 6.65], [-6.18, 6.68], [-6.03, 7.03], [-5.5, 7.25], [-4.97, 7.03], [-4.82, 6.68], [-4.47, 6.53], [-4.32, 6.18], [-4.25, 6.15], [-4.0, 6.25], [-3.47, 6.03], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.25, 4.85], [-4.32, 4.82], [-4.47, 4.47], [-5.0, 4.25], [-5.25, 4.35], [-5.5, 4.25], [-5.75, 4.35], [-6.0, 4.25], [-6.25, 4.35], [-6.5, 4.25], [-6.75, 4.35], [-7.0, 4.25], [-7.25, 4.35], [-7.5, 4.25], [-7.75, 4.35], [-8.0, 4.25], [-8.53, 4.47], [-8.68, 4.82], [-8.75, 4.85], [-9.0, 4.75], [-9.53, 4.97]]]]}, "2018-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.5, 6.75], [-8.25, 6.65], [-8.0, 6.75], [-7.75, 6.65], [-7.5, 6.75], [-7.25, 6.65], [-7.0, 6.75], [-6.75, 6.65], [-6.5, 6.75], [-6.25, 6.65], [-6.18, 6.68], [-6.03, 7.03], [-5.5, 7.25], [-4.97, 7.03], [-4.82, 6.68], [-4.47, 6.53], [-4.32, 6.18], [-4.25, 6.15], [-4.0, 6.25], [-3.47, 6.03], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.25, 4.85], [-4.32, 4.82], [-4.47, 4.47], [-5.0, 4.25], [-5.25, 4.35], [-5.5, 4.25], [-5.75, 4.35], [-6.0, 4.25], [-6.25, 4.35], [-6.5, 4.25], [-6.75, 4.35], [-7.0, 4.25], [-7.25, 4.35], [-7.5, 4.25], [-7.75, 4.35], [-8.0, 4.25], [-8.53, 4.47], [-8.68, 4.82], [-8.75, 4.85], [-9.0, 4.75], [-9.53, 4.97], [-9.75, 5.5], [-9.53, 6.03], [-9.18, 6.18], [-9.03, 6.53], [-8.5, 6.75]]]]}, "2018-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.5, 6.75], [-8.25, 6.65], [-8.0, 6.75], [-7.75, 6.65], [-7.5, 6.75], [-7.0, 6.54], [-6.5, 6.75], [-6.2, 6.62], [-6.03, 7.03], [-5.5, 7.25], [-4.97, 7.03], [-4.75, 6.5], [-4.97, 5.97], [-5.5, 5.75], [-5.8, 5.88], [-5.97, 5.47], [-6.5, 5.25], [-7.0, 5.46], [-7.37, 5.3], [-7.25, 5.0], [-7.47, 4.47], [-8.0, 4.25], [-8.53, 4.47], [-8.68, 4.82], [-8.75, 4.85], [-9.0, 4.75], [-9.53, 4.97], [-9.75, 5.5], [-9.53, 6.03], [-9.18, 6.18], [-9.03, 6.53], [-8.5, 6.75]]]]}, "2018-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.03, 5.47], [-9.25, 6.0], [-9.03, 6.53], [-8.5, 6.75], [-8.25, 6.65], [-8.0, 6.75], [-7.47, 6.53], [-7.25, 6.0], [-7.47, 5.47], [-8.0, 5.25], [-8.25, 5.35], [-8.5, 5.25], [-9.03, 5.47]]]]}, "2018-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.03, 5.47], [-9.25, 6.0], [-9.03, 6.53], [-8.5, 6.75], [-8.25, 6.65], [-8.0, 6.75], [-7.47, 6.53], [-7.25, 6.0], [-7.47, 5.47], [-8.0, 5.25], [-8.25, 5.35], [-8.5, 5.25], [-9.03, 5.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4323157342191735}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7497035775458496}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.41145923641801, 23.841107414126157, 22.395253560122853, 23.945274405889165, 23.77645154260233, 22.82689304577667]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.21253647043187, 23.009938053455187, 21.4555978897626, 23.588999673281307, 23.61960733050745, 22.81339202419923]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6314933836960313, -1.2170512965126181, -2.6358440024967895, -0.9554735853711804, -0.9788389527351171, -1.8703733702556917]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2884166116888878, -1.7590572516799625, -3.4323157342191735, -1.1100969620042633, -1.0230404303474643, -1.9717954721325555]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.526438877680793, -1.8585320715046953, -3.848975621556018, -1.3942008473386494, -1.4185214382557705, -2.708112224504954]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.4159604771150933, -2.5985695534262865, -4.71602406965733, -1.5422136672925488, -1.5047623280380704, -2.796272298234135]}}