{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:35.764161", "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-Mar-28_to_2023-Apr-04_22.0_61.5"}, "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": 2023030000938}, "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 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 71100.60114572509}, "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": 61.5}, "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": 22.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 62.03], [22.0, 62.25], [22.25, 62.15], [22.5, 62.25], [23.03, 62.03], [23.25, 61.5], [23.03, 60.97], [22.68, 60.82], [22.53, 60.47], [22.0, 60.25], [21.47, 60.47], [21.25, 61.0], [21.35, 61.25], [21.25, 61.5], [21.47, 62.03]]]]}, "2023-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, 61.53], [21.32, 61.68], [21.35, 61.75], [21.25, 62.0], [21.47, 62.53], [22.0, 62.75], [22.25, 62.65], [22.5, 62.75], [22.75, 62.65], [23.0, 62.75], [23.25, 62.65], [23.5, 62.75], [23.75, 62.65], [24.0, 62.75], [24.25, 62.65], [24.5, 62.75], [24.75, 62.65], [24.82, 62.68], [24.97, 63.03], [25.5, 63.25], [25.75, 63.15], [26.0, 63.25], [26.25, 63.15], [26.5, 63.25], [26.75, 63.15], [27.0, 63.25], [27.53, 63.03], [27.75, 62.5], [27.65, 62.25], [27.75, 62.0], [27.65, 61.75], [27.75, 61.5], [27.65, 61.25], [27.75, 61.0], [27.53, 60.47], [27.0, 60.25], [26.75, 60.35], [26.68, 60.32], [26.53, 59.97], [26.0, 59.75], [25.75, 59.85], [25.5, 59.75], [25.25, 59.85], [25.0, 59.75], [24.75, 59.85], [24.5, 59.75], [24.25, 59.85], [24.0, 59.75], [23.75, 59.85], [23.5, 59.75], [23.25, 59.85], [23.0, 59.75], [22.75, 59.85], [22.5, 59.75], [22.25, 59.85], [22.0, 59.75], [21.75, 59.85], [21.5, 59.75], [20.97, 59.97], [20.75, 60.5], [20.85, 60.75], [20.75, 61.0], [20.97, 61.53]]]]}, "2023-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, 61.53], [21.32, 61.68], [21.35, 61.75], [21.25, 62.0], [21.47, 62.53], [22.0, 62.75], [22.25, 62.65], [22.5, 62.75], [22.75, 62.65], [23.0, 62.75], [23.25, 62.65], [23.5, 62.75], [23.75, 62.65], [24.0, 62.75], [24.25, 62.65], [24.5, 62.75], [24.75, 62.65], [24.82, 62.68], [24.97, 63.03], [25.5, 63.25], [25.75, 63.15], [26.0, 63.25], [26.25, 63.15], [26.5, 63.25], [26.75, 63.15], [27.0, 63.25], [27.53, 63.03], [27.75, 62.5], [27.65, 62.25], [27.75, 62.0], [27.65, 61.75], [27.75, 61.5], [27.65, 61.25], [27.75, 61.0], [27.53, 60.47], [27.0, 60.25], [26.75, 60.35], [26.68, 60.32], [26.53, 59.97], [26.0, 59.75], [25.75, 59.85], [25.5, 59.75], [25.25, 59.85], [25.0, 59.75], [24.75, 59.85], [24.5, 59.75], [24.25, 59.85], [24.0, 59.75], [23.75, 59.85], [23.5, 59.75], [23.25, 59.85], [23.0, 59.75], [22.75, 59.85], [22.5, 59.75], [22.25, 59.85], [22.0, 59.75], [21.75, 59.85], [21.5, 59.75], [20.97, 59.97], [20.75, 60.5], [20.85, 60.75], [20.75, 61.0], [20.97, 61.53]]]]}, "2023-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, 61.53], [21.32, 61.68], [21.35, 61.75], [21.25, 62.0], [21.47, 62.53], [22.0, 62.75], [22.25, 62.65], [22.5, 62.75], [22.75, 62.65], [23.0, 62.75], [23.25, 62.65], [23.5, 62.75], [23.75, 62.65], [24.0, 62.75], [24.25, 62.65], [24.5, 62.75], [24.75, 62.65], [24.82, 62.68], [24.97, 63.03], [25.5, 63.25], [25.75, 63.15], [26.0, 63.25], [26.25, 63.15], [26.5, 63.25], [26.75, 63.15], [27.0, 63.25], [27.53, 63.03], [27.75, 62.5], [27.65, 62.25], [27.75, 62.0], [27.65, 61.75], [27.75, 61.5], [27.65, 61.25], [27.75, 61.0], [27.53, 60.47], [27.0, 60.25], [26.75, 60.35], [26.68, 60.32], [26.53, 59.97], [26.0, 59.75], [25.75, 59.85], [25.5, 59.75], [25.25, 59.85], [25.0, 59.75], [24.75, 59.85], [24.5, 59.75], [24.25, 59.85], [24.0, 59.75], [23.75, 59.85], [23.5, 59.75], [23.25, 59.85], [23.0, 59.75], [22.75, 59.85], [22.5, 59.75], [22.25, 59.85], [22.0, 59.75], [21.75, 59.85], [21.5, 59.75], [20.97, 59.97], [20.75, 60.5], [20.85, 60.75], [20.75, 61.0], [20.97, 61.53]]]]}, "2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.0, 62.25], [22.25, 62.15], [22.5, 62.25], [23.03, 62.03], [23.25, 61.5], [23.03, 60.97], [22.68, 60.82], [22.53, 60.47], [22.0, 60.25], [21.47, 60.47], [21.25, 61.0], [21.35, 61.25], [21.25, 61.5], [21.47, 62.03], [22.0, 62.25]]], [[[23.75, 61.0], [23.97, 61.53], [24.5, 61.75], [24.75, 61.65], [25.0, 61.75], [25.3, 61.63], [25.47, 62.03], [26.0, 62.25], [26.5, 62.04], [27.0, 62.25], [27.53, 62.03], [27.75, 61.5], [27.65, 61.25], [27.75, 61.0], [27.53, 60.47], [27.0, 60.25], [26.47, 60.47], [26.3, 60.88], [26.0, 60.75], [25.7, 60.88], [25.53, 60.47], [25.0, 60.25], [24.75, 60.35], [24.5, 60.25], [23.97, 60.47], [23.75, 61.0]]]]}, "2023-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 62.03], [22.0, 62.25], [22.25, 62.15], [22.5, 62.25], [23.03, 62.03], [23.25, 61.5], [23.03, 60.97], [22.63, 60.8], [22.75, 60.5], [22.53, 59.97], [22.0, 59.75], [21.47, 59.97], [21.25, 60.5], [21.46, 61.0], [21.25, 61.5], [21.47, 62.03]]]]}, "2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 62.03], [22.0, 62.25], [22.25, 62.15], [22.5, 62.25], [23.03, 62.03], [23.25, 61.5], [23.03, 60.97], [22.63, 60.8], [22.75, 60.5], [22.53, 59.97], [22.0, 59.75], [21.47, 59.97], [21.25, 60.5], [21.46, 61.0], [21.25, 61.5], [21.47, 62.03]]]]}, "2023-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 62.03], [22.0, 62.25], [22.25, 62.15], [22.5, 62.25], [23.03, 62.03], [23.25, 61.5], [23.03, 60.97], [22.63, 60.8], [22.75, 60.5], [22.53, 59.97], [22.0, 59.75], [21.47, 59.97], [21.25, 60.5], [21.46, 61.0], [21.25, 61.5], [21.47, 62.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.368902479716496}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.225965756750399}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.597389971132429, -6.111604238107589, -7.190473947362477, -5.916299169070385, -3.6388100741196467, -2.6417785354798866, -3.475723250795511, -3.5357436750454667]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.219198988133428, -7.570287330192855, -8.64040985753553, -7.58304023092461, -4.388245073534222, -3.1767763137963243, -4.09898202152857, -3.9204691872421904]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.96844526466225, -5.919881141750847, -7.226814944504938, -6.181761405033065, -4.3754663408575, -4.043487946175162, -5.082750505027377, -5.334880883582154]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.21668388923473, -7.794238104704164, -9.368902479716496, -8.202195041374239, -4.533317102499325, -4.381692960888074, -5.5244790817920375, -5.550623286386383]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5335967387245013, -1.8533137992554793, -2.3475512482877137, -2.0671122499423134, -1.45975749736631, -1.4601392297138691, -1.9045037003811232, -2.084967200795549]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5521715770603917, -2.5593804924812744, -3.5547340661451794, -2.8379048438689476, -1.569534803558002, -1.4625591645785359, -1.9619941057552641, -2.246408256910144]}}