{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:16.766648", "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-Oct-13_to_2025-Oct-16_22.5_32.5"}, "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": 2025100000408}, "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": "October 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 16 2025"}, "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": 57072.54229246073}, "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": ["Libya"]}, "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": ["Mediterranean Ridge", "Mediterranean Sea"]}, "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": 32.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[25.53, 32.53], [25.75, 32.0], [25.53, 31.47], [25.0, 31.25], [24.75, 31.35], [24.5, 31.25], [24.25, 31.35], [24.0, 31.25], [23.75, 31.35], [23.5, 31.25], [22.97, 31.47], [22.82, 31.82], [22.75, 31.85], [22.5, 31.75], [22.25, 31.85], [22.0, 31.75], [21.75, 31.85], [21.5, 31.75], [20.97, 31.97], [20.75, 32.5], [20.96, 33.0], [20.82, 33.32], [20.47, 33.47], [20.25, 34.0], [20.47, 34.53], [21.0, 34.75], [21.25, 34.65], [21.5, 34.75], [21.75, 34.65], [22.0, 34.75], [22.25, 34.65], [22.5, 34.75], [23.03, 34.53], [23.18, 34.18], [23.53, 34.03], [23.68, 33.68], [24.03, 33.53], [24.18, 33.18], [24.25, 33.15], [24.5, 33.25], [25.03, 33.03], [25.18, 32.68], [25.53, 32.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 33.47], [20.25, 34.0], [20.47, 34.53], [21.0, 34.75], [21.25, 34.65], [21.5, 34.75], [21.75, 34.65], [22.0, 34.75], [22.25, 34.65], [22.5, 34.75], [23.03, 34.53], [23.18, 34.18], [23.53, 34.03], [23.68, 33.68], [24.03, 33.53], [24.18, 33.18], [24.53, 33.03], [24.68, 32.68], [25.03, 32.53], [25.25, 32.0], [25.03, 31.47], [24.5, 31.25], [24.25, 31.35], [24.0, 31.25], [23.75, 31.35], [23.5, 31.25], [22.97, 31.47], [22.82, 31.82], [22.75, 31.85], [22.5, 31.75], [22.25, 31.85], [22.0, 31.75], [21.75, 31.85], [21.5, 31.75], [20.97, 31.97], [20.75, 32.5], [20.96, 33.0], [20.82, 33.32], [20.47, 33.47]]]]}, "2025-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 33.47], [20.25, 34.0], [20.47, 34.53], [21.0, 34.75], [21.25, 34.65], [21.5, 34.75], [21.75, 34.65], [22.0, 34.75], [22.25, 34.65], [22.5, 34.75], [23.03, 34.53], [23.18, 34.18], [23.53, 34.03], [23.68, 33.68], [24.03, 33.53], [24.18, 33.18], [24.25, 33.15], [24.5, 33.25], [25.03, 33.03], [25.18, 32.68], [25.53, 32.53], [25.75, 32.0], [25.53, 31.47], [25.0, 31.25], [24.75, 31.35], [24.5, 31.25], [24.25, 31.35], [24.0, 31.25], [23.75, 31.35], [23.5, 31.25], [22.97, 31.47], [22.82, 31.82], [22.75, 31.85], [22.5, 31.75], [22.25, 31.85], [22.0, 31.75], [21.75, 31.85], [21.5, 31.75], [20.97, 31.97], [20.75, 32.5], [20.96, 33.0], [20.82, 33.32], [20.47, 33.47]]]]}, "2025-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 33.47], [20.25, 34.0], [20.47, 34.53], [21.0, 34.75], [21.25, 34.65], [21.5, 34.75], [21.75, 34.65], [22.0, 34.75], [22.25, 34.65], [22.5, 34.75], [23.03, 34.53], [23.18, 34.18], [23.53, 34.03], [23.68, 33.68], [24.03, 33.53], [24.18, 33.18], [24.25, 33.15], [24.5, 33.25], [25.03, 33.03], [25.18, 32.68], [25.53, 32.53], [25.75, 32.0], [25.53, 31.47], [25.0, 31.25], [24.75, 31.35], [24.5, 31.25], [24.25, 31.35], [24.0, 31.25], [23.75, 31.35], [23.5, 31.25], [22.97, 31.47], [22.82, 31.82], [22.75, 31.85], [22.5, 31.75], [22.25, 31.85], [22.0, 31.75], [21.75, 31.85], [21.5, 31.75], [20.97, 31.97], [20.75, 32.5], [20.96, 33.0], [20.82, 33.32], [20.47, 33.47]]]]}, "2025-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.5, 33.25], [25.03, 33.03], [25.18, 32.68], [25.53, 32.53], [25.75, 32.0], [25.53, 31.47], [25.0, 31.25], [24.75, 31.35], [24.5, 31.25], [24.25, 31.35], [24.0, 31.25], [23.47, 31.47], [23.25, 32.0], [23.47, 32.53], [23.82, 32.68], [23.97, 33.03], [24.5, 33.25]]], [[[22.5, 31.75], [21.97, 31.97], [21.75, 32.5], [21.97, 33.03], [22.5, 33.25], [23.03, 33.03], [23.25, 32.5], [23.03, 31.97], [22.5, 31.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.581012528552094}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.003596835341713}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.79010365804038, 20.786501127300824, 20.58569257331618, 20.877562204996764]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.22789662679037, 16.589376068115257, 16.49109547932943, 18.549502309163415]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8892185100074244, -1.9782357261910462, -2.1411131312955547, -1.9676273147449024]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7891578378469717, -3.4760809786008053, -3.581012528552094, -2.6961954605214373]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2240143548661968, -1.2690704043383614, -1.3491035767383701, -1.1378486306716842]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4159654743074501, -1.4356610722925036, -1.5146869909756875, -1.1846613744478576]}}