{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-28 16:19:52.284820", "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": "2026-May-14_to_2026-May-18_343.0_13.5"}, "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": 2026050000354}, "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 14 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2026"}, "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": 54165.73575333267}, "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": ["Senegal"]}, "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": ["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": 13.5}, "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": 343.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "343.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 341.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 343.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.53, 15.03], [-17.0, 15.25], [-16.47, 15.03], [-16.25, 14.5], [-16.46, 14.0], [-16.25, 13.5], [-16.47, 12.97], [-17.0, 12.75], [-17.53, 12.97], [-17.75, 13.5], [-17.54, 14.0], [-17.75, 14.5], [-17.53, 15.03]]]]}, "2026-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.15, 13.25], [-19.25, 13.5], [-19.15, 13.75], [-19.25, 14.0], [-19.03, 14.53], [-18.5, 14.75], [-18.25, 14.65], [-18.18, 14.68], [-18.03, 15.03], [-17.5, 15.25], [-17.25, 15.15], [-17.0, 15.25], [-16.47, 15.03], [-16.25, 14.5], [-16.46, 14.0], [-16.25, 13.5], [-16.35, 13.25], [-16.25, 13.0], [-16.35, 12.75], [-16.32, 12.68], [-15.97, 12.53], [-15.75, 12.0], [-15.97, 11.47], [-16.5, 11.25], [-16.75, 11.35], [-17.0, 11.25], [-17.53, 11.47], [-17.68, 11.82], [-17.75, 11.85], [-18.0, 11.75], [-18.25, 11.85], [-18.5, 11.75], [-19.03, 11.97], [-19.25, 12.5], [-19.15, 12.75], [-19.25, 13.0], [-19.15, 13.25]]]]}, "2026-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.15, 13.25], [-19.25, 13.5], [-19.15, 13.75], [-19.25, 14.0], [-19.03, 14.53], [-18.5, 14.75], [-18.25, 14.65], [-18.18, 14.68], [-18.03, 15.03], [-17.5, 15.25], [-17.25, 15.15], [-17.0, 15.25], [-16.47, 15.03], [-16.25, 14.5], [-16.46, 14.0], [-16.25, 13.5], [-16.35, 13.25], [-16.25, 13.0], [-16.35, 12.75], [-16.32, 12.68], [-15.97, 12.53], [-15.75, 12.0], [-15.97, 11.47], [-16.5, 11.25], [-16.75, 11.35], [-17.0, 11.25], [-17.53, 11.47], [-17.68, 11.82], [-17.75, 11.85], [-18.0, 11.75], [-18.25, 11.85], [-18.5, 11.75], [-19.03, 11.97], [-19.25, 12.5], [-19.15, 12.75], [-19.25, 13.0], [-19.15, 13.25]]]]}, "2026-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.15, 13.25], [-19.25, 13.5], [-19.15, 13.75], [-19.25, 14.0], [-19.03, 14.53], [-18.5, 14.75], [-18.25, 14.65], [-18.18, 14.68], [-18.03, 15.03], [-17.5, 15.25], [-16.97, 15.03], [-16.75, 14.5], [-16.85, 14.25], [-16.82, 14.18], [-16.47, 14.03], [-16.25, 13.5], [-16.35, 13.25], [-16.25, 13.0], [-16.35, 12.75], [-16.32, 12.68], [-15.97, 12.53], [-15.75, 12.0], [-15.97, 11.47], [-16.5, 11.25], [-16.75, 11.35], [-17.0, 11.25], [-17.53, 11.47], [-17.68, 11.82], [-17.75, 11.85], [-18.0, 11.75], [-18.25, 11.85], [-18.5, 11.75], [-19.03, 11.97], [-19.25, 12.5], [-19.15, 12.75], [-19.25, 13.0], [-19.15, 13.25]]]]}, "2026-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.5, 15.25], [-16.97, 15.03], [-16.75, 14.5], [-16.85, 14.25], [-16.82, 14.18], [-16.47, 14.03], [-16.25, 13.5], [-16.47, 12.97], [-17.0, 12.75], [-17.53, 12.97], [-17.68, 13.32], [-18.0, 13.46], [-18.5, 13.25], [-19.03, 13.47], [-19.25, 14.0], [-19.03, 14.53], [-18.5, 14.75], [-18.2, 14.62], [-18.03, 15.03], [-17.5, 15.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3314002598257275}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.718863947246634}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.796128845214866, 21.530720534979082, 21.2489814475731, 21.447494910745093, 21.01844177246096]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.676988220214866, 20.283923085530603, 19.95375213623049, 20.24245986938479, 20.608733113606775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5665973256585914, -1.5705536107940896, -1.8979279102329656, -1.7288737676537682, -1.576986617795157]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.669734159997347, -1.9552376600016714, -2.3314002598257275, -2.229187668320776, -1.7882519452846282]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1987535643453362, -1.368838123582905, -1.6691949398036363, -1.5256349924185089, -1.3685315050757938]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3610169183530552, -1.5994141090763787, -1.9188865702704245, -1.82527925823331, -1.4728477950410976]}}