{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:59.015419", "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": "2011-Mar-28_to_2011-Mar-30_7.0_64.5"}, "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": 2011030001364}, "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": "March 28 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 59468.9791450431}, "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": ["Norway"]}, "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": ["Norwegian 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": 64.5}, "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": 7.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 63.75], [3.25, 63.65], [3.32, 63.68], [3.47, 64.03], [4.0, 64.25], [4.25, 64.15], [4.5, 64.25], [4.8, 64.13], [4.87, 64.3], [4.47, 64.47], [4.25, 65.0], [4.47, 65.53], [5.0, 65.75], [5.25, 65.65], [5.5, 65.75], [5.75, 65.65], [6.0, 65.75], [6.25, 65.65], [6.5, 65.75], [7.03, 65.53], [7.18, 65.18], [7.25, 65.15], [7.5, 65.25], [8.03, 65.03], [8.18, 64.68], [8.25, 64.65], [8.5, 64.75], [8.75, 64.65], [9.0, 64.75], [9.53, 64.53], [9.75, 64.0], [9.53, 63.47], [9.0, 63.25], [8.75, 63.35], [8.68, 63.32], [8.53, 62.97], [8.0, 62.75], [7.75, 62.85], [7.68, 62.82], [7.53, 62.47], [7.0, 62.25], [6.75, 62.35], [6.5, 62.25], [6.25, 62.35], [6.18, 62.32], [6.03, 61.97], [5.68, 61.82], [5.53, 61.47], [5.0, 61.25], [4.75, 61.35], [4.5, 61.25], [4.25, 61.35], [4.0, 61.25], [3.75, 61.35], [3.5, 61.25], [2.97, 61.47], [2.82, 61.82], [2.75, 61.85], [2.5, 61.75], [1.97, 61.97], [1.75, 62.5], [1.97, 63.03], [2.32, 63.18], [2.47, 63.53], [3.0, 63.75]]]]}, "2011-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 63.75], [3.25, 63.65], [3.32, 63.68], [3.47, 64.03], [4.0, 64.25], [4.25, 64.15], [4.5, 64.25], [4.8, 64.13], [4.87, 64.3], [4.47, 64.47], [4.25, 65.0], [4.47, 65.53], [5.0, 65.75], [5.25, 65.65], [5.5, 65.75], [5.75, 65.65], [6.0, 65.75], [6.25, 65.65], [6.5, 65.75], [7.03, 65.53], [7.18, 65.18], [7.25, 65.15], [7.5, 65.25], [8.03, 65.03], [8.18, 64.68], [8.25, 64.65], [8.5, 64.75], [8.75, 64.65], [9.0, 64.75], [9.53, 64.53], [9.75, 64.0], [9.53, 63.47], [9.0, 63.25], [8.75, 63.35], [8.68, 63.32], [8.53, 62.97], [8.0, 62.75], [7.75, 62.85], [7.68, 62.82], [7.53, 62.47], [7.0, 62.25], [6.75, 62.35], [6.5, 62.25], [6.25, 62.35], [6.18, 62.32], [6.03, 61.97], [5.68, 61.82], [5.53, 61.47], [5.0, 61.25], [4.75, 61.35], [4.5, 61.25], [4.25, 61.35], [4.0, 61.25], [3.75, 61.35], [3.5, 61.25], [2.97, 61.47], [2.82, 61.82], [2.75, 61.85], [2.5, 61.75], [1.97, 61.97], [1.75, 62.5], [1.97, 63.03], [2.32, 63.18], [2.47, 63.53], [3.0, 63.75]]]]}, "2011-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 63.75], [3.25, 63.65], [3.32, 63.68], [3.47, 64.03], [4.0, 64.25], [4.25, 64.15], [4.5, 64.25], [4.8, 64.13], [4.87, 64.3], [4.47, 64.47], [4.25, 65.0], [4.47, 65.53], [5.0, 65.75], [5.25, 65.65], [5.5, 65.75], [5.75, 65.65], [6.0, 65.75], [6.25, 65.65], [6.5, 65.75], [7.03, 65.53], [7.18, 65.18], [7.25, 65.15], [7.5, 65.25], [8.03, 65.03], [8.18, 64.68], [8.25, 64.65], [8.5, 64.75], [8.75, 64.65], [9.0, 64.75], [9.53, 64.53], [9.75, 64.0], [9.53, 63.47], [9.0, 63.25], [8.75, 63.35], [8.68, 63.32], [8.53, 62.97], [8.0, 62.75], [7.75, 62.85], [7.68, 62.82], [7.53, 62.47], [7.0, 62.25], [6.75, 62.35], [6.5, 62.25], [6.25, 62.35], [6.18, 62.32], [6.03, 61.97], [5.68, 61.82], [5.53, 61.47], [5.0, 61.25], [4.75, 61.35], [4.5, 61.25], [4.25, 61.35], [4.0, 61.25], [3.75, 61.35], [3.5, 61.25], [2.97, 61.47], [2.82, 61.82], [2.75, 61.85], [2.5, 61.75], [1.97, 61.97], [1.75, 62.5], [1.97, 63.03], [2.32, 63.18], [2.47, 63.53], [3.0, 63.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.6336084010388277}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0011139290648123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.4407278276523243, 1.4469769475262524, 1.8979316181084869]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.7225117509308348, 0.7743646868254928, 0.6040216623707124]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.096696381039902, -3.1680586205643864, -2.738586785590148]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6336084010388277, -3.5463193663176185, -3.239537528392532]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.691220070829378, -1.7492815357870857, -1.5119885804653896]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9121885981738402, -1.8910802496987982, -1.8084860449051665]}}