{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:59.116471", "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-Dec-09_to_2012-Dec-12_353.0_41.5"}, "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": 2012120000432}, "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": "December 09 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 12 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": 65537.36362617988}, "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": ["Portugal", "Spain"]}, "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": ["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": []}, "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": 41.5}, "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": 353.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 42.53], [-7.5, 42.75], [-7.25, 42.65], [-7.0, 42.75], 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42.0], [-8.03, 42.53]]]]}, "2012-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 42.53], [-7.5, 42.75], [-7.25, 42.65], [-7.0, 42.75], [-6.75, 42.65], [-6.68, 42.68], [-6.53, 43.03], [-6.0, 43.25], [-5.47, 43.03], [-5.32, 42.68], [-4.97, 42.53], [-4.82, 42.18], [-4.75, 42.15], [-4.5, 42.25], [-3.97, 42.03], [-3.75, 41.5], [-3.85, 41.25], [-3.82, 41.18], [-3.47, 41.03], [-3.32, 40.68], [-3.25, 40.65], [-3.0, 40.75], [-2.47, 40.53], [-2.32, 40.18], [-2.25, 40.15], [-2.0, 40.25], [-1.47, 40.03], [-1.25, 39.5], [-1.35, 39.25], [-1.25, 39.0], [-1.47, 38.47], [-2.0, 38.25], [-2.53, 38.47], [-2.68, 38.82], [-2.75, 38.85], [-2.82, 38.82], [-2.97, 38.47], [-3.5, 38.25], [-3.75, 38.35], [-4.0, 38.25], [-4.25, 38.35], [-4.5, 38.25], [-5.03, 38.47], [-5.25, 39.0], [-5.03, 39.53], [-4.5, 39.75], [-4.25, 39.65], [-4.18, 39.68], [-4.15, 39.75], [-4.18, 39.82], [-4.53, 39.97], [-4.68, 40.32], [-4.75, 40.35], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.53, 40.47], [-6.68, 40.82], [-6.75, 40.85], [-7.0, 40.75], [-7.25, 40.85], [-7.5, 40.75], [-8.03, 40.97], [-8.25, 41.5], [-8.15, 41.75], [-8.25, 42.0], [-8.03, 42.53]]]]}, "2012-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 42.53], [-7.5, 42.75], [-7.25, 42.65], [-7.0, 42.75], [-6.75, 42.65], [-6.68, 42.68], [-6.53, 43.03], [-6.0, 43.25], [-5.47, 43.03], [-5.32, 42.68], [-4.97, 42.53], [-4.82, 42.18], [-4.75, 42.15], [-4.5, 42.25], [-3.97, 42.03], [-3.75, 41.5], [-3.85, 41.25], [-3.82, 41.18], [-3.47, 41.03], [-3.32, 40.68], [-3.25, 40.65], [-3.0, 40.75], [-2.47, 40.53], [-2.32, 40.18], [-2.25, 40.15], [-2.0, 40.25], [-1.47, 40.03], [-1.25, 39.5], [-1.35, 39.25], [-1.25, 39.0], [-1.47, 38.47], [-2.0, 38.25], [-2.53, 38.47], [-2.68, 38.82], [-2.75, 38.85], [-2.82, 38.82], [-2.97, 38.47], [-3.5, 38.25], [-3.75, 38.35], [-4.0, 38.25], [-4.25, 38.35], [-4.5, 38.25], [-5.03, 38.47], [-5.25, 39.0], [-5.03, 39.53], [-4.5, 39.75], [-4.25, 39.65], [-4.18, 39.68], [-4.15, 39.75], [-4.18, 39.82], [-4.53, 39.97], [-4.68, 40.32], [-4.75, 40.35], [-5.0, 40.25], [-5.25, 40.35], [-5.5, 40.25], [-5.75, 40.35], [-6.0, 40.25], [-6.53, 40.47], [-6.68, 40.82], [-6.75, 40.85], [-7.0, 40.75], [-7.25, 40.85], [-7.5, 40.75], [-8.03, 40.97], [-8.25, 41.5], [-8.15, 41.75], [-8.25, 42.0], [-8.03, 42.53]]]]}, "2012-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.25, 40.0], [-4.03, 40.53], [-3.5, 40.75], [-3.25, 40.65], [-3.0, 40.75], [-2.47, 40.53], [-2.25, 40.0], [-2.47, 39.47], [-3.0, 39.25], [-3.25, 39.35], [-3.5, 39.25], [-4.03, 39.47], [-4.25, 40.0]]], [[[-7.75, 41.5], [-7.53, 42.03], [-7.0, 42.25], [-6.75, 42.15], [-6.5, 42.25], [-5.97, 42.03], [-5.75, 41.5], [-5.97, 40.97], [-6.5, 40.75], [-6.75, 40.85], [-7.0, 40.75], [-7.53, 40.97], [-7.75, 41.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.8276916823528495}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.138787906072617}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.448401788245235, 1.7322873739119018, 1.855623947313859, 2.3364137958720335]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.9280661538624031, -0.008550342544765499, -0.039985114575074476, 2.0350591146741976]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7484575460093073, -4.481372186407768, -4.203638382293099, -3.921474540610518]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.6095052155810095, -5.8276916823528495, -5.50590547771526, -4.153157303731405]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4991566786936414, -1.7485271602182855, -1.5783132950172323, -1.3994571626223502]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.769103910357564, -2.1657247612180086, -1.9494250034661367, -1.4336375324865587]}}