{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:17.426930", "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-Jan-06_to_2026-Jan-11_354.0_32.0"}, "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": 2026010000238}, "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": "January 06 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 11 2026"}, "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": 60444.531362544}, "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": ["Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 32.0}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.18, 32.18], [-9.03, 32.53], [-8.68, 32.68], [-8.53, 33.03], [-8.0, 33.25], [-7.75, 33.15], [-7.5, 33.25], [-7.0, 33.04], [-6.5, 33.25], [-6.25, 33.15], [-6.0, 33.25], [-5.75, 33.15], [-5.5, 33.25], [-5.25, 33.15], [-5.0, 33.25], [-4.47, 33.03], [-4.25, 32.5], [-4.35, 32.25], [-4.25, 32.0], [-4.47, 31.47], [-5.0, 31.25], [-5.25, 31.35], [-5.5, 31.25], [-5.75, 31.35], [-5.82, 31.32], [-5.97, 30.97], [-6.5, 30.75], [-6.75, 30.85], [-7.0, 30.75], [-7.3, 30.88], [-7.47, 30.47], [-8.0, 30.25], [-8.53, 30.47], [-8.7, 30.88], [-8.82, 30.82], [-8.97, 30.47], [-9.5, 30.25], [-10.03, 30.47], [-10.25, 31.0], [-10.03, 31.53], [-9.68, 31.68], [-9.53, 32.03], [-9.18, 32.18]]]]}, "2026-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.25, 31.0], [-10.03, 31.53], [-9.68, 31.68], [-9.53, 32.03], [-9.18, 32.18], [-9.03, 32.53], [-8.68, 32.68], [-8.53, 33.03], [-8.0, 33.25], [-7.75, 33.15], [-7.5, 33.25], [-7.0, 33.04], [-6.5, 33.25], [-6.25, 33.15], [-6.0, 33.25], [-5.75, 33.15], [-5.5, 33.25], [-5.25, 33.15], [-5.0, 33.25], [-4.47, 33.03], [-4.25, 32.5], [-4.35, 32.25], [-4.25, 32.0], [-4.47, 31.47], [-5.0, 31.25], [-5.25, 31.35], [-5.5, 31.25], [-5.75, 31.35], [-5.82, 31.32], [-5.97, 30.97], [-6.5, 30.75], [-6.75, 30.85], [-7.0, 30.75], [-7.3, 30.88], [-7.47, 30.47], [-7.82, 30.32], [-7.97, 29.97], [-8.5, 29.75], [-8.75, 29.85], [-9.0, 29.75], [-9.53, 29.97], [-9.68, 30.32], [-10.03, 30.47], [-10.25, 31.0]]]]}, "2026-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.25, 31.0], [-10.03, 31.53], [-9.68, 31.68], [-9.53, 32.03], [-9.18, 32.18], [-9.03, 32.53], [-8.68, 32.68], [-8.53, 33.03], [-8.0, 33.25], [-7.75, 33.15], [-7.5, 33.25], [-7.0, 33.04], [-6.5, 33.25], [-6.25, 33.15], [-6.0, 33.25], [-5.75, 33.15], [-5.5, 33.25], [-5.25, 33.15], [-5.0, 33.25], [-4.47, 33.03], [-4.25, 32.5], [-4.35, 32.25], [-4.25, 32.0], [-4.47, 31.47], [-5.0, 31.25], [-5.25, 31.35], [-5.5, 31.25], [-5.75, 31.35], [-5.82, 31.32], [-5.97, 30.97], [-6.5, 30.75], [-6.75, 30.85], [-7.0, 30.75], [-7.3, 30.88], [-7.47, 30.47], [-7.82, 30.32], [-7.97, 29.97], [-8.5, 29.75], [-8.75, 29.85], [-9.0, 29.75], [-9.53, 29.97], [-9.68, 30.32], [-10.03, 30.47], [-10.25, 31.0]]]]}, "2026-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 30.5], [-10.53, 31.03], [-10.0, 31.25], [-9.5, 31.04], [-9.12, 31.2], [-9.25, 31.5], [-9.15, 31.75], [-9.25, 32.0], [-9.03, 32.53], [-8.5, 32.75], [-8.25, 32.65], [-8.0, 32.75], [-7.75, 32.65], [-7.5, 32.75], [-6.97, 32.53], [-6.75, 32.0], [-6.97, 31.47], [-7.5, 31.25], [-7.75, 31.35], [-7.82, 31.32], [-7.96, 31.0], [-7.75, 30.5], [-7.97, 29.97], [-8.5, 29.75], [-8.75, 29.85], [-9.0, 29.75], [-9.5, 29.96], [-10.0, 29.75], [-10.53, 29.97], [-10.75, 30.5]]], [[[-5.47, 32.53], [-5.25, 32.0], [-5.47, 31.47], [-6.0, 31.25], [-6.53, 31.47], [-6.75, 32.0], [-6.53, 32.53], [-6.0, 32.75], [-5.47, 32.53]]]]}, "2026-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.0, 31.25], [-9.47, 31.03], [-9.25, 30.5], [-9.47, 29.97], [-10.0, 29.75], [-10.53, 29.97], [-10.75, 30.5], [-10.53, 31.03], [-10.0, 31.25]]]]}, "2026-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.0, 31.25], [-9.47, 31.03], [-9.25, 30.5], [-9.47, 29.97], [-10.0, 29.75], [-10.53, 29.97], [-10.75, 30.5], [-10.53, 31.03], [-10.0, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.405761116643305}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.054266061719863}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.9317317628024284, 3.1944016196511598, 4.841560618082667, 8.696795399983728, 14.751645660400413, 14.85199635823568]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.372240447998024, -7.425127410888649, 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"description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.011971839157515, -3.015955827925757, -1.9923557630844968, -1.6658475373965724, -1.4813132089704244, -1.3829770270096384]}}