{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:50.942034", "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": "2012-Nov-29_to_2012-Dec-02_0.5_53.0"}, "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": 2012110001106}, "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": "November 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 02 2012"}, "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": 77522.37324934754}, "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": ["United Kingdom"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": ["English Channel", "North 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": 53.0}, "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": 360.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "0.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 357.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 362.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.03, 52.53], [-2.5, 52.75], [-2.25, 52.65], [-2.0, 52.75], [-1.75, 52.65], [-1.5, 52.75], [-0.97, 52.53], [-0.75, 52.0], [-0.85, 51.75], [-0.75, 51.5], [-0.85, 51.25], [-0.75, 51.0], [-0.97, 50.47], [-1.5, 50.25], [-1.75, 50.35], [-2.0, 50.25], [-2.25, 50.35], [-2.5, 50.25], [-3.03, 50.47], [-3.25, 51.0], [-3.04, 51.5], [-3.25, 52.0], [-3.03, 52.53]]]]}, "2012-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.03, 52.53], [-2.5, 52.75], [-2.25, 52.65], [-2.0, 52.75], [-1.75, 52.65], [-1.5, 52.75], [-1.25, 52.65], [-1.18, 52.68], [-1.15, 52.75], [-1.25, 53.0], [-1.03, 53.53], [-0.68, 53.68], [-0.65, 53.75], [-0.68, 53.82], [-1.03, 53.97], [-1.18, 54.32], [-1.53, 54.47], [-1.75, 55.0], [-1.53, 55.53], [-1.0, 55.75], [-0.75, 55.65], [-0.5, 55.75], [0.03, 55.53], [0.25, 55.0], [0.15, 54.75], [0.18, 54.68], [0.53, 54.53], [0.68, 54.18], [0.75, 54.15], [1.0, 54.25], [1.53, 54.03], [1.75, 53.5], [1.65, 53.25], [1.68, 53.18], [1.75, 53.15], [2.0, 53.25], [2.53, 53.03], [2.75, 52.5], [2.65, 52.25], [2.75, 52.0], [2.53, 51.47], [2.18, 51.32], [2.03, 50.97], [1.68, 50.82], [1.53, 50.47], [1.0, 50.25], [0.75, 50.35], [0.5, 50.25], [0.25, 50.35], [0.0, 50.25], [-0.25, 50.35], [-0.5, 50.25], [-1.0, 50.46], [-1.5, 50.25], [-1.75, 50.35], [-2.0, 50.25], [-2.25, 50.35], [-2.5, 50.25], [-3.03, 50.47], [-3.25, 51.0], [-3.04, 51.5], [-3.25, 52.0], [-3.03, 52.53]]]]}, "2012-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.03, 52.53], [-2.5, 52.75], [-2.25, 52.65], [-2.0, 52.75], [-1.75, 52.65], [-1.5, 52.75], [-1.25, 52.65], [-1.18, 52.68], [-1.15, 52.75], [-1.25, 53.0], [-1.03, 53.53], [-0.68, 53.68], [-0.65, 53.75], [-0.68, 53.82], [-1.03, 53.97], [-1.18, 54.32], [-1.53, 54.47], [-1.75, 55.0], [-1.53, 55.53], [-1.0, 55.75], [-0.75, 55.65], [-0.5, 55.75], [0.03, 55.53], [0.25, 55.0], [0.15, 54.75], [0.18, 54.68], [0.53, 54.53], [0.68, 54.18], [0.75, 54.15], [1.0, 54.25], [1.53, 54.03], [1.75, 53.5], [1.65, 53.25], [1.68, 53.18], [1.75, 53.15], [2.0, 53.25], [2.53, 53.03], [2.75, 52.5], [2.65, 52.25], [2.75, 52.0], [2.53, 51.47], [2.18, 51.32], [2.03, 50.97], [1.68, 50.82], [1.53, 50.47], [1.0, 50.25], [0.75, 50.35], [0.5, 50.25], [0.25, 50.35], [0.0, 50.25], [-0.25, 50.35], [-0.5, 50.25], [-1.0, 50.46], [-1.5, 50.25], [-1.75, 50.35], [-2.0, 50.25], [-2.25, 50.35], [-2.5, 50.25], [-3.03, 50.47], [-3.25, 51.0], [-3.04, 51.5], [-3.25, 52.0], [-3.03, 52.53]]]]}, "2012-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.75, 52.0], [-1.53, 52.53], [-1.18, 52.68], [-1.15, 52.75], [-1.25, 53.0], [-1.03, 53.53], [-0.68, 53.68], [-0.65, 53.75], [-0.68, 53.82], [-1.03, 53.97], [-1.18, 54.32], [-1.53, 54.47], [-1.75, 55.0], [-1.53, 55.53], [-1.0, 55.75], [-0.75, 55.65], [-0.5, 55.75], [0.03, 55.53], [0.25, 55.0], [0.15, 54.75], [0.18, 54.68], [0.53, 54.53], [0.68, 54.18], [0.75, 54.15], [1.0, 54.25], [1.53, 54.03], [1.75, 53.5], [1.65, 53.25], [1.68, 53.18], [1.75, 53.15], [2.0, 53.25], [2.53, 53.03], [2.75, 52.5], [2.65, 52.25], [2.75, 52.0], [2.53, 51.47], 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"description": "The daily evolution of mean t2m anomalies.", "value": [-5.690150164777577, -5.041382503931306, -4.5277312108011865, -4.877063620704496]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.275319942439239, -6.559119215017631, -5.580615538350685, -6.230528069325658]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.632213205836888, -1.749333615528367, -1.5923244646334662, -1.7395139710247944]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7535729880657362, -2.0620993792010927, -1.876941589824104, -1.9779014147577594]}}