{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:31.052765", "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": "2020-Apr-26_to_2020-Apr-30_28.0_63.5"}, "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": 2020040000666}, "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": "April 26 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2020"}, "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": 75288.1606233735}, "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": ["Finland"]}, "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": []}, "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": 63.5}, "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.75}, "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": {"2020-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.0, 64.25], [28.53, 64.03], [28.75, 63.5], [28.53, 62.97], [28.0, 62.75], [27.47, 62.97], [27.25, 63.5], [27.47, 64.03], [28.0, 64.25]]]]}, "2020-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.97, 64.53], [27.5, 64.75], [28.03, 64.53], [28.18, 64.18], [28.53, 64.03], [28.75, 63.5], [28.53, 62.97], [28.0, 62.75], [27.47, 62.97], [27.32, 63.32], [26.97, 63.47], [26.75, 64.0], [26.97, 64.53]]], [[[25.47, 64.47], [25.25, 65.0], [25.47, 65.53], [26.0, 65.75], [26.53, 65.53], [26.75, 65.0], [26.53, 64.47], [26.0, 64.25], [25.47, 64.47]]]]}, "2020-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 63.53], [21.82, 63.68], [21.97, 64.03], [22.5, 64.25], [22.75, 64.15], [22.82, 64.18], [22.97, 64.53], [23.5, 64.75], [23.75, 64.65], [24.0, 64.75], [24.25, 64.65], [24.5, 64.75], [24.75, 64.65], [25.0, 64.75], [25.25, 64.65], [25.32, 64.68], [25.35, 64.75], [25.25, 65.0], [25.47, 65.53], [26.0, 65.75], [26.25, 65.65], [26.5, 65.75], [26.75, 65.65], [27.0, 65.75], [27.53, 65.53], [27.75, 65.0], [27.65, 64.75], [27.68, 64.68], [28.03, 64.53], [28.18, 64.18], [28.53, 64.03], [28.75, 63.5], [28.53, 62.97], [28.0, 62.75], [27.75, 62.85], [27.5, 62.75], [27.25, 62.85], [27.18, 62.82], [27.03, 62.47], [26.5, 62.25], [26.25, 62.35], [26.18, 62.32], [26.03, 61.97], [25.68, 61.82], [25.53, 61.47], [25.0, 61.25], [24.75, 61.35], [24.5, 61.25], [24.25, 61.35], [24.0, 61.25], [23.75, 61.35], [23.68, 61.32], [23.53, 60.97], [23.18, 60.82], [23.03, 60.47], [22.5, 60.25], [22.25, 60.35], [22.0, 60.25], [21.47, 60.47], [21.25, 61.0], [21.47, 61.53], [21.88, 61.7], [21.82, 61.82], [21.47, 61.97], [21.25, 62.5], [21.35, 62.75], [21.25, 63.0], [21.47, 63.53]]]]}, "2020-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 63.53], [21.82, 63.68], [21.97, 64.03], [22.5, 64.25], [22.75, 64.15], [22.82, 64.18], [22.97, 64.53], [23.5, 64.75], [23.75, 64.65], [24.0, 64.75], [24.25, 64.65], [24.5, 64.75], [24.75, 64.65], [25.0, 64.75], [25.25, 64.65], [25.32, 64.68], [25.35, 64.75], [25.25, 65.0], [25.47, 65.53], [26.0, 65.75], [26.25, 65.65], [26.5, 65.75], [26.75, 65.65], [27.0, 65.75], [27.53, 65.53], [27.75, 65.0], [27.65, 64.75], [27.68, 64.68], [28.03, 64.53], [28.18, 64.18], [28.53, 64.03], [28.75, 63.5], [28.53, 62.97], [28.0, 62.75], [27.75, 62.85], [27.5, 62.75], [27.25, 62.85], [27.18, 62.82], [27.03, 62.47], [26.5, 62.25], [26.25, 62.35], [26.18, 62.32], [26.03, 61.97], [25.68, 61.82], [25.53, 61.47], [25.0, 61.25], [24.75, 61.35], [24.5, 61.25], [24.25, 61.35], [24.0, 61.25], [23.75, 61.35], [23.68, 61.32], [23.53, 60.97], [23.18, 60.82], [23.03, 60.47], [22.5, 60.25], [22.25, 60.35], [22.0, 60.25], [21.47, 60.47], [21.25, 61.0], [21.47, 61.53], [21.88, 61.7], [21.82, 61.82], [21.47, 61.97], [21.25, 62.5], [21.35, 62.75], [21.25, 63.0], [21.47, 63.53]]]]}, "2020-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 63.53], [21.82, 63.68], [21.97, 64.03], [22.5, 64.25], [22.75, 64.15], [22.82, 64.18], [22.97, 64.53], [23.5, 64.75], [23.75, 64.65], [24.0, 64.75], [24.25, 64.65], [24.5, 64.75], [24.75, 64.65], [25.0, 64.75], [25.25, 64.65], [25.32, 64.68], [25.35, 64.75], [25.25, 65.0], [25.47, 65.53], [26.0, 65.75], [26.25, 65.65], [26.5, 65.75], [26.75, 65.65], [27.0, 65.75], [27.53, 65.53], [27.75, 65.0], [27.65, 64.75], [27.68, 64.68], [28.03, 64.53], [28.18, 64.18], [28.53, 64.03], [28.75, 63.5], [28.53, 62.97], [28.0, 62.75], [27.75, 62.85], [27.5, 62.75], [27.25, 62.85], [27.18, 62.82], [27.03, 62.47], [26.5, 62.25], [26.25, 62.35], [26.18, 62.32], [26.03, 61.97], [25.68, 61.82], [25.53, 61.47], [25.0, 61.25], [24.75, 61.35], [24.5, 61.25], [24.25, 61.35], [24.0, 61.25], [23.75, 61.35], [23.68, 61.32], [23.53, 60.97], [23.18, 60.82], [23.03, 60.47], [22.5, 60.25], [22.25, 60.35], [22.0, 60.25], [21.47, 60.47], [21.25, 61.0], [21.47, 61.53], [21.88, 61.7], [21.82, 61.82], [21.47, 61.97], [21.25, 62.5], [21.35, 62.75], [21.25, 63.0], [21.47, 63.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.283255428592781}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.142954534938291}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.22670215521719683, 0.25294783146642885, 0.9973022462551739, 0.7679466066001055, 0.8474034714093364]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.22670215521719683, -0.12076611255969283, -0.19483554290712846, -1.3639541650968, -1.9438076187884121]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.15090432776384, -4.297450138487989, -4.796859305836894, -5.268314232975476, -5.429033832604818]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.15090432776384, -4.454567055055179, -5.490602310268855, -6.51479447244958, -7.283255428592781]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.163909450372561, -1.227440215668313, -1.3807884961300956, -1.4825893296276416, -1.4909836494911588]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.163909450372561, -1.2595666500086238, -1.5663158237946644, -1.7243048755970465, -1.9473964581103596]}}