{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:52.971092", "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": "2023-Jan-21_to_2023-Jan-25_357.5_46.0"}, "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": 2023010001013}, "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 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2023"}, "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": 51512.059752498506}, "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": ["France"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Bay of Biscay"]}, "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": 46.0}, "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": 357.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 359.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.25, 46.5], [-2.03, 47.03], [-1.5, 47.25], [-0.97, 47.03], [-0.82, 46.68], [-0.47, 46.53], [-0.25, 46.0], [-0.47, 45.47], [-1.0, 45.25], [-1.53, 45.47], [-1.68, 45.82], [-2.03, 45.97], [-2.25, 46.5]]]]}, "2023-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.62, 46.2], [-4.75, 46.5], [-4.53, 47.03], [-4.18, 47.18], [-4.03, 47.53], [-3.5, 47.75], [-3.25, 47.65], [-3.0, 47.75], [-2.47, 47.53], [-2.32, 47.18], [-2.25, 47.15], [-2.0, 47.25], [-1.75, 47.15], [-1.5, 47.25], [-0.97, 47.03], [-0.82, 46.68], [-0.47, 46.53], [-0.25, 46.0], [-0.47, 45.47], [-1.0, 45.25], [-1.3, 45.38], [-1.47, 44.97], [-2.0, 44.75], [-2.25, 44.85], [-2.5, 44.75], [-2.75, 44.85], [-3.0, 44.75], [-3.5, 44.96], [-3.82, 44.82], [-3.97, 44.47], [-4.5, 44.25], [-4.75, 44.35], [-5.0, 44.25], [-5.53, 44.47], [-5.75, 45.0], [-5.53, 45.53], [-5.18, 45.68], [-5.03, 46.03], [-4.62, 46.2]]]]}, "2023-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 46.0], [-5.15, 46.25], [-5.25, 46.5], [-5.03, 47.03], [-4.5, 47.25], [-4.25, 47.15], [-4.18, 47.18], [-4.03, 47.53], [-3.5, 47.75], [-3.25, 47.65], [-3.0, 47.75], [-2.47, 47.53], [-2.32, 47.18], [-2.25, 47.15], [-2.0, 47.25], [-1.75, 47.15], [-1.5, 47.25], [-0.97, 47.03], [-0.82, 46.68], [-0.47, 46.53], [-0.25, 46.0], [-0.47, 45.47], [-1.0, 45.25], [-1.3, 45.38], [-1.47, 44.97], [-2.0, 44.75], [-2.25, 44.85], [-2.5, 44.75], [-2.75, 44.85], [-3.0, 44.75], [-3.25, 44.85], [-3.5, 44.75], [-3.75, 44.85], [-3.82, 44.82], [-3.97, 44.47], [-4.5, 44.25], [-4.75, 44.35], [-5.0, 44.25], [-5.53, 44.47], [-5.75, 45.0], [-5.53, 45.53], [-5.18, 45.68], [-5.15, 45.75], [-5.25, 46.0]]]]}, "2023-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 46.0], [-5.15, 46.25], [-5.25, 46.5], [-5.03, 47.03], [-4.5, 47.25], [-4.25, 47.15], [-4.18, 47.18], [-4.03, 47.53], [-3.5, 47.75], [-3.25, 47.65], [-3.0, 47.75], [-2.47, 47.53], [-2.32, 47.18], [-2.25, 47.15], [-2.0, 47.25], [-1.47, 47.03], [-1.25, 46.5], [-1.35, 46.25], [-1.25, 46.0], [-1.35, 45.75], [-1.25, 45.5], [-1.47, 44.97], [-2.0, 44.75], [-2.25, 44.85], [-2.5, 44.75], [-2.75, 44.85], [-3.0, 44.75], [-3.25, 44.85], [-3.5, 44.75], [-3.75, 44.85], [-3.82, 44.82], [-3.97, 44.47], [-4.5, 44.25], [-4.75, 44.35], [-5.0, 44.25], [-5.53, 44.47], [-5.75, 45.0], [-5.53, 45.53], [-5.18, 45.68], [-5.15, 45.75], [-5.25, 46.0]]]]}, "2023-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.15, 46.25], [-5.25, 46.5], [-5.03, 47.03], [-4.5, 47.25], [-4.25, 47.15], [-4.0, 47.25], [-3.75, 47.15], [-3.5, 47.25], [-3.25, 47.15], [-3.0, 47.25], [-2.75, 47.15], [-2.5, 47.25], [-1.97, 47.03], [-1.75, 46.5], [-1.85, 46.25], [-1.82, 46.18], [-1.47, 46.03], [-1.25, 45.5], [-1.47, 44.97], [-2.0, 44.75], [-2.25, 44.85], [-2.5, 44.75], [-2.75, 44.85], [-3.0, 44.75], [-3.25, 44.85], [-3.5, 44.75], [-3.75, 44.85], [-4.0, 44.75], [-4.25, 44.85], [-4.5, 44.75], [-5.03, 44.97], [-5.25, 45.5], [-5.15, 45.75], [-5.25, 46.0], [-5.15, 46.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.376796047179653}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7810972648478383}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.7817246827862618, 5.5066318124740405, 5.872038059286808, 6.390842008691891, 6.786982604787795]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.7811498654453999, -0.5727989977222023, 1.503225681118579, 4.171240368922383, 5.0241255984880695]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.027737431603839, -4.134822065776659, -3.8950014411394087, -3.591302877147293, -3.295330061551258]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.084931627997776, -7.376796047179653, -5.227629515790284, -4.246082147665277, -4.023071636467989]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4280102312461476, -1.7215682607711746, -1.7293163709475008, -1.642202013177428, -1.515431245226797]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.458666336602679, -2.0995937388320516, -1.8679738713728873, -1.7545009275383807, -1.6098168649470075]}}