{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:49.477379", "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": "2025-Jun-18_to_2025-Jun-23_33.0_18.5"}, "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": 2025060000562}, "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 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 23 2025"}, "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": 64479.29688677179}, "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": ["Sudan"]}, "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": 18.5}, "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": 33.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "33.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.75}, "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": 19.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.35, 18.75], [31.25, 19.0], [31.47, 19.53], [32.0, 19.75], [32.25, 19.65], [32.5, 19.75], [32.75, 19.65], [33.0, 19.75], [33.25, 19.65], [33.5, 19.75], [33.75, 19.65], [34.0, 19.75], [34.25, 19.65], [34.5, 19.75], [34.75, 19.65], [35.0, 19.75], [35.25, 19.65], [35.5, 19.75], [36.03, 19.53], [36.25, 19.0], [36.03, 18.47], [35.68, 18.32], [35.65, 18.25], [35.75, 18.0], [35.53, 17.47], [35.0, 17.25], [34.75, 17.35], [34.5, 17.25], [34.25, 17.35], [34.0, 17.25], [33.75, 17.35], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.75, 17.35], [32.5, 17.25], [32.25, 17.35], [32.0, 17.25], [31.47, 17.47], [31.25, 18.0], [31.35, 18.25], [31.25, 18.5], [31.35, 18.75]]]]}, "2025-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.35, 18.75], [31.25, 19.0], [31.47, 19.53], [32.0, 19.75], [32.25, 19.65], [32.5, 19.75], [32.75, 19.65], [33.0, 19.75], [33.25, 19.65], [33.5, 19.75], [33.75, 19.65], [34.0, 19.75], [34.25, 19.65], [34.5, 19.75], [34.75, 19.65], [35.0, 19.75], [35.25, 19.65], [35.5, 19.75], [36.03, 19.53], [36.25, 19.0], [36.03, 18.47], [35.68, 18.32], [35.65, 18.25], [35.75, 18.0], [35.53, 17.47], [35.0, 17.25], [34.75, 17.35], [34.5, 17.25], [34.25, 17.35], [34.0, 17.25], [33.75, 17.35], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.75, 17.35], [32.5, 17.25], [32.25, 17.35], [32.0, 17.25], [31.47, 17.47], [31.25, 18.0], [31.35, 18.25], [31.25, 18.5], [31.35, 18.75]]]]}, "2025-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.35, 18.75], [31.25, 19.0], [31.47, 19.53], [32.0, 19.75], [32.25, 19.65], [32.5, 19.75], [32.75, 19.65], [33.0, 19.75], [33.25, 19.65], [33.5, 19.75], [33.75, 19.65], [34.0, 19.75], [34.25, 19.65], [34.5, 19.75], [34.75, 19.65], [35.0, 19.75], [35.25, 19.65], [35.5, 19.75], [36.03, 19.53], [36.25, 19.0], [36.03, 18.47], [35.68, 18.32], [35.65, 18.25], [35.75, 18.0], [35.53, 17.47], [35.0, 17.25], [34.75, 17.35], [34.5, 17.25], [34.25, 17.35], [34.0, 17.25], [33.75, 17.35], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.75, 17.35], [32.5, 17.25], [32.25, 17.35], [32.0, 17.25], [31.47, 17.47], [31.25, 18.0], [31.35, 18.25], [31.25, 18.5], [31.35, 18.75]]]]}, "2025-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.97, 19.03], [32.5, 19.25], [32.75, 19.15], [33.0, 19.25], [33.5, 19.04], [34.0, 19.25], [34.25, 19.15], [34.5, 19.25], [35.03, 19.03], [35.25, 18.5], [35.03, 17.97], [34.5, 17.75], [34.25, 17.85], [34.0, 17.75], [33.5, 17.96], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.75, 18.0], [31.85, 18.25], [31.75, 18.5], [31.97, 19.03]]]]}, "2025-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.97, 19.03], [32.5, 19.25], [32.75, 19.15], [33.0, 19.25], [33.5, 19.04], [34.0, 19.25], [34.25, 19.15], [34.5, 19.25], [35.03, 19.03], [35.25, 18.5], [35.03, 17.97], [34.5, 17.75], [34.25, 17.85], [34.0, 17.75], [33.5, 17.96], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.75, 18.0], [31.85, 18.25], [31.75, 18.5], [31.97, 19.03]]]]}, "2025-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.97, 19.03], [32.5, 19.25], [32.75, 19.15], [33.0, 19.25], [33.5, 19.04], [34.0, 19.25], [34.25, 19.15], [34.5, 19.25], [35.03, 19.03], [35.25, 18.5], [35.03, 17.97], [34.5, 17.75], [34.25, 17.85], [34.0, 17.75], [33.5, 17.96], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.75, 18.0], [31.85, 18.25], [31.75, 18.5], [31.97, 19.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.327327930698118}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.592140730501979}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [32.745672538063786, 32.371713950417245, 32.6533859946511, 32.710789489746105, 32.439981587727914, 32.30230458577478]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [31.89852676391604, 31.45380808512374, 31.751955922444665, 32.15027516682943, 31.80549265543624, 31.76794586181643]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.523828931474492, -2.8320353266625955, -2.4965118486330122, -2.276716398668043, -2.5294023049329213, -2.636106260742656]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0638583460153086, -3.327327930698118, -2.9117372344975934, -2.444888111373075, -2.7161682098991946, -2.816417206271808]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.566407875159889, -1.7838245050931008, -1.584390811749551, -1.4274971072809444, -1.6121880104005364, -1.7012365600036823]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6941960776578553, -1.9070699392206725, -1.7251652755620075, -1.4679513297967388, -1.6973426850351852, -1.7882298990676295]}}