{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:42.836872", "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": "2022-Jan-07_to_2022-Jan-10_17.5_66.5"}, "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": 2022010000389}, "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": "January 07 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 10 2022"}, "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": 162777.88943654773}, "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", "Norway", "Sweden"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe", "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": 66.5}, "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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.0, 67.25], [13.25, 67.15], [13.32, 67.18], [13.47, 67.53], [14.0, 67.75], [14.25, 67.65], [14.5, 67.75], [14.75, 67.65], [15.0, 67.75], [15.25, 67.65], [15.5, 67.75], [15.75, 67.65], [15.82, 67.68], [15.97, 68.03], [16.5, 68.25], [17.03, 68.03], [17.25, 67.5], [17.13, 67.2], [17.25, 67.15], [17.32, 67.18], [17.47, 67.53], [17.82, 67.68], [17.97, 68.03], [18.5, 68.25], [18.75, 68.15], [19.0, 68.25], [19.25, 68.15], [19.5, 68.25], [19.75, 68.15], [19.82, 68.18], [19.97, 68.53], [20.5, 68.75], [20.75, 68.65], [21.0, 68.75], [21.25, 68.65], [21.5, 68.75], [22.0, 68.54], [22.5, 68.75], [22.75, 68.65], [23.0, 68.75], [23.25, 68.65], [23.5, 68.75], [23.75, 68.65], [24.0, 68.75], [24.25, 68.65], [24.5, 68.75], [24.75, 68.65], [25.0, 68.75], [25.53, 68.53], [25.75, 68.0], [25.53, 67.47], [25.18, 67.32], [25.04, 67.0], [25.25, 66.5], [25.15, 66.25], [25.25, 66.0], [25.15, 65.75], [25.18, 65.68], [25.53, 65.53], [25.68, 65.18], [26.03, 65.03], [26.25, 64.5], [26.03, 63.97], [25.68, 63.82], [25.53, 63.47], [25.0, 63.25], [24.75, 63.35], [24.5, 63.25], [24.25, 63.35], [24.0, 63.25], [23.75, 63.35], [23.68, 63.32], [23.53, 62.97], [23.0, 62.75], [22.75, 62.85], [22.68, 62.82], [22.53, 62.47], [22.0, 62.25], [21.75, 62.35], [21.68, 62.32], [21.65, 62.25], [21.75, 62.0], [21.65, 61.75], [21.75, 61.5], [21.53, 60.97], [21.0, 60.75], [20.47, 60.97], [20.25, 61.5], [20.35, 61.75], [20.32, 61.82], [19.97, 61.97], [19.75, 62.5], [19.97, 63.03], [20.32, 63.18], [20.46, 63.5], [20.25, 64.0], [20.47, 64.53], [20.82, 64.68], [20.85, 64.75], [20.75, 65.0], [20.88, 65.3], [20.75, 65.35], [20.5, 65.25], [20.25, 65.35], [20.18, 65.32], [20.15, 65.25], [20.25, 65.0], [20.15, 64.75], [20.25, 64.5], [20.03, 63.97], [19.5, 63.75], [19.25, 63.85], [19.0, 63.75], [18.75, 63.85], [18.5, 63.75], [18.25, 63.85], [18.0, 63.75], [17.47, 63.97], [17.32, 64.32], [16.97, 64.47], [16.82, 64.82], [16.75, 64.85], [16.5, 64.75], [15.97, 64.97], [15.75, 65.5], [15.85, 65.75], [15.82, 65.82], [15.75, 65.85], [15.5, 65.75], [15.25, 65.85], [15.18, 65.82], [15.03, 65.47], [14.5, 65.25], [14.25, 65.35], [14.18, 65.32], [14.03, 64.97], [13.5, 64.75], [13.25, 64.85], [13.0, 64.75], [12.47, 64.97], [12.32, 65.32], [12.25, 65.35], [12.0, 65.25], [11.47, 65.47], [11.25, 66.0], [11.47, 66.53], [11.82, 66.68], [11.97, 67.03], [12.5, 67.25], [12.75, 67.15], [13.0, 67.25]], [[22.25, 64.15], [22.32, 64.18], [22.38, 64.3], [22.25, 64.35], [22.18, 64.32], [22.13, 64.2], [22.25, 64.15]], [[23.32, 65.32], [23.25, 65.35], [23.18, 65.32], [23.15, 65.25], [23.2, 65.13], [23.32, 65.18], [23.35, 65.25], [23.32, 65.32]], [[21.75, 66.85], [21.63, 66.8], [21.68, 66.68], [21.75, 66.65], [21.82, 66.68], [21.88, 66.8], [21.75, 66.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 67.03], [12.5, 67.25], [12.75, 67.15], [13.0, 67.25], [13.3, 67.13], [13.47, 67.53], [14.0, 67.75], [14.25, 67.65], [14.5, 67.75], [14.75, 67.65], [15.0, 67.75], [15.25, 67.65], [15.5, 67.75], [15.75, 67.65], [16.0, 67.75], [16.53, 67.53], [16.68, 67.18], [16.75, 67.15], [17.0, 67.25], [17.25, 67.15], [17.32, 67.18], [17.47, 67.53], [17.82, 67.68], [17.97, 68.03], [18.5, 68.25], [18.75, 68.15], [19.0, 68.25], [19.25, 68.15], [19.5, 68.25], [19.75, 68.15], [20.0, 68.25], [20.53, 68.03], [20.75, 67.5], [20.53, 66.97], [20.0, 66.75], [19.75, 66.85], [19.63, 66.8], [19.75, 66.5], [19.65, 66.25], [19.68, 66.18], [20.03, 66.03], [20.25, 65.5], [20.15, 65.25], [20.25, 65.0], [20.15, 64.75], [20.25, 64.5], [20.03, 63.97], [19.5, 63.75], [19.25, 63.85], [19.0, 63.75], [18.75, 63.85], [18.5, 63.75], [18.25, 63.85], [18.0, 63.75], [17.47, 63.97], [17.32, 64.32], [16.97, 64.47], [16.82, 64.82], [16.75, 64.85], [16.5, 64.75], [15.97, 64.97], [15.75, 65.5], [15.85, 65.75], [15.82, 65.82], [15.75, 65.85], [15.5, 65.75], [15.25, 65.85], [15.18, 65.82], [15.03, 65.47], [14.5, 65.25], [14.25, 65.35], [14.18, 65.32], [14.03, 64.97], [13.5, 64.75], [13.25, 64.85], [13.0, 64.75], [12.47, 64.97], [12.32, 65.32], [12.25, 65.35], [12.0, 65.25], [11.47, 65.47], [11.25, 66.0], [11.47, 66.53], [11.82, 66.68], [11.97, 67.03]]]]}, "2022-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 67.03], [12.5, 67.25], [12.75, 67.15], [13.0, 67.25], [13.25, 67.15], [13.32, 67.18], [13.47, 67.53], [14.0, 67.75], [14.25, 67.65], [14.5, 67.75], [14.75, 67.65], [15.0, 67.75], [15.25, 67.65], [15.5, 67.75], [15.75, 67.65], [15.82, 67.68], [15.97, 68.03], [16.5, 68.25], [17.03, 68.03], [17.25, 67.5], [17.13, 67.2], [17.25, 67.15], [17.32, 67.18], [17.47, 67.53], [17.82, 67.68], [17.97, 68.03], [18.5, 68.25], [18.75, 68.15], [19.0, 68.25], [19.25, 68.15], [19.5, 68.25], [19.75, 68.15], [19.82, 68.18], [19.97, 68.53], [20.5, 68.75], [20.75, 68.65], [21.0, 68.75], [21.25, 68.65], [21.5, 68.75], [22.0, 68.54], [22.5, 68.75], [22.75, 68.65], [23.0, 68.75], [23.25, 68.65], [23.5, 68.75], [23.75, 68.65], [24.0, 68.75], [24.25, 68.65], [24.5, 68.75], [24.75, 68.65], [25.0, 68.75], [25.53, 68.53], [25.75, 68.0], [25.53, 67.47], [25.18, 67.32], [25.04, 67.0], [25.25, 66.5], [25.15, 66.25], [25.25, 66.0], [25.15, 65.75], [25.18, 65.68], [25.53, 65.53], [25.68, 65.18], [26.03, 65.03], [26.25, 64.5], [26.03, 63.97], [25.68, 63.82], [25.53, 63.47], [25.0, 63.25], [24.75, 63.35], [24.5, 63.25], [24.25, 63.35], [24.0, 63.25], [23.75, 63.35], [23.68, 63.32], [23.53, 62.97], [23.0, 62.75], [22.75, 62.85], [22.68, 62.82], [22.53, 62.47], [22.0, 62.25], [21.75, 62.35], [21.68, 62.32], [21.65, 62.25], [21.75, 62.0], [21.65, 61.75], [21.75, 61.5], [21.53, 60.97], [21.0, 60.75], [20.47, 60.97], [20.25, 61.5], [20.35, 61.75], [20.32, 61.82], [19.97, 61.97], [19.75, 62.5], [19.97, 63.03], [20.32, 63.18], [20.46, 63.5], [20.25, 64.0], [20.47, 64.53], [20.82, 64.68], [20.85, 64.75], [20.75, 65.0], [20.88, 65.3], [20.75, 65.35], [20.5, 65.25], [20.25, 65.35], [20.18, 65.32], [20.15, 65.25], [20.25, 65.0], [20.15, 64.75], [20.25, 64.5], [20.03, 63.97], [19.5, 63.75], [19.25, 63.85], [19.0, 63.75], [18.75, 63.85], [18.5, 63.75], [18.25, 63.85], [18.0, 63.75], [17.47, 63.97], [17.32, 64.32], [16.97, 64.47], [16.82, 64.82], [16.75, 64.85], [16.5, 64.75], [15.97, 64.97], [15.75, 65.5], [15.85, 65.75], [15.82, 65.82], [15.75, 65.85], [15.5, 65.75], [15.25, 65.85], [15.18, 65.82], [15.03, 65.47], [14.5, 65.25], [14.25, 65.35], [14.18, 65.32], [14.03, 64.97], [13.5, 64.75], [13.25, 64.85], [13.0, 64.75], [12.47, 64.97], [12.32, 65.32], [12.25, 65.35], [12.0, 65.25], [11.47, 65.47], [11.25, 66.0], [11.47, 66.53], [11.82, 66.68], [11.97, 67.03]], [[22.25, 64.35], [22.18, 64.32], [22.13, 64.2], [22.25, 64.15], [22.32, 64.18], [22.38, 64.3], [22.25, 64.35]], [[23.2, 65.13], [23.32, 65.18], [23.35, 65.25], [23.32, 65.32], [23.25, 65.35], [23.18, 65.32], [23.15, 65.25], [23.2, 65.13]], [[21.75, 66.65], [21.82, 66.68], [21.88, 66.8], [21.75, 66.85], [21.63, 66.8], [21.68, 66.68], [21.75, 66.65]]]]}, "2022-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 67.03], [12.5, 67.25], [12.75, 67.15], [13.0, 67.25], [13.25, 67.15], [13.32, 67.18], [13.47, 67.53], [14.0, 67.75], [14.25, 67.65], [14.5, 67.75], [14.75, 67.65], [15.0, 67.75], [15.25, 67.65], [15.5, 67.75], [15.75, 67.65], [15.82, 67.68], [15.97, 68.03], [16.5, 68.25], [17.03, 68.03], [17.25, 67.5], [17.13, 67.2], [17.25, 67.15], [17.32, 67.18], [17.47, 67.53], [17.82, 67.68], [17.97, 68.03], [18.5, 68.25], [18.75, 68.15], [19.0, 68.25], [19.25, 68.15], [19.5, 68.25], [19.75, 68.15], [19.82, 68.18], [19.97, 68.53], [20.5, 68.75], [20.75, 68.65], [21.0, 68.75], [21.25, 68.65], [21.5, 68.75], [22.0, 68.54], [22.5, 68.75], [22.75, 68.65], [23.0, 68.75], [23.25, 68.65], [23.5, 68.75], [23.75, 68.65], [24.0, 68.75], [24.25, 68.65], [24.5, 68.75], [24.75, 68.65], [25.0, 68.75], [25.53, 68.53], [25.75, 68.0], [25.53, 67.47], [25.18, 67.32], [25.04, 67.0], [25.25, 66.5], [25.15, 66.25], [25.25, 66.0], [25.15, 65.75], [25.18, 65.68], [25.53, 65.53], [25.68, 65.18], [26.03, 65.03], [26.25, 64.5], [26.03, 63.97], [25.68, 63.82], [25.53, 63.47], [25.0, 63.25], [24.75, 63.35], [24.5, 63.25], [24.25, 63.35], [24.0, 63.25], [23.75, 63.35], [23.68, 63.32], [23.53, 62.97], [23.0, 62.75], [22.75, 62.85], [22.68, 62.82], [22.53, 62.47], [22.0, 62.25], [21.75, 62.35], [21.68, 62.32], [21.65, 62.25], [21.75, 62.0], [21.65, 61.75], [21.75, 61.5], [21.53, 60.97], [21.0, 60.75], [20.47, 60.97], [20.25, 61.5], [20.35, 61.75], [20.32, 61.82], [19.97, 61.97], [19.75, 62.5], [19.97, 63.03], [20.32, 63.18], [20.46, 63.5], [20.25, 64.0], [20.47, 64.53], [20.82, 64.68], [20.85, 64.75], [20.75, 65.0], [20.88, 65.3], [20.75, 65.35], [20.5, 65.25], [20.25, 65.35], [20.18, 65.32], [20.15, 65.25], [20.25, 65.0], [20.15, 64.75], [20.25, 64.5], [20.03, 63.97], [19.5, 63.75], [19.25, 63.85], [19.0, 63.75], [18.75, 63.85], [18.5, 63.75], [18.25, 63.85], [18.0, 63.75], [17.47, 63.97], [17.32, 64.32], [16.97, 64.47], [16.82, 64.82], [16.75, 64.85], [16.5, 64.75], [15.97, 64.97], [15.75, 65.5], [15.85, 65.75], [15.82, 65.82], [15.75, 65.85], [15.5, 65.75], [15.25, 65.85], [15.18, 65.82], [15.03, 65.47], [14.5, 65.25], [14.25, 65.35], [14.18, 65.32], [14.03, 64.97], [13.5, 64.75], [13.25, 64.85], [13.0, 64.75], [12.47, 64.97], [12.32, 65.32], [12.25, 65.35], [12.0, 65.25], [11.47, 65.47], [11.25, 66.0], [11.47, 66.53], [11.82, 66.68], [11.97, 67.03]], [[22.25, 64.35], [22.18, 64.32], [22.13, 64.2], [22.25, 64.15], [22.32, 64.18], [22.38, 64.3], [22.25, 64.35]], [[23.2, 65.13], [23.32, 65.18], [23.35, 65.25], [23.32, 65.32], [23.25, 65.35], [23.18, 65.32], [23.15, 65.25], [23.2, 65.13]], [[21.75, 66.65], [21.82, 66.68], [21.88, 66.8], [21.75, 66.85], [21.63, 66.8], [21.68, 66.68], [21.75, 66.65]]]]}, "2022-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.75, 66.5], [11.97, 67.03], [12.5, 67.25], [12.75, 67.15], [13.0, 67.25], [13.25, 67.15], [13.5, 67.25], [13.75, 67.15], [13.82, 67.18], [13.97, 67.53], [14.5, 67.75], [14.75, 67.65], [15.0, 67.75], [15.25, 67.65], [15.5, 67.75], [15.75, 67.65], [15.82, 67.68], [15.97, 68.03], [16.5, 68.25], [17.03, 68.03], [17.25, 67.5], [17.13, 67.2], [17.25, 67.15], [17.32, 67.18], [17.47, 67.53], [17.82, 67.68], [17.97, 68.03], [18.5, 68.25], [18.75, 68.15], [19.0, 68.25], [19.25, 68.15], [19.5, 68.25], [19.75, 68.15], [19.82, 68.18], [19.97, 68.53], [20.5, 68.75], [20.75, 68.65], [21.0, 68.75], [21.25, 68.65], [21.5, 68.75], [22.0, 68.54], [22.5, 68.75], [22.75, 68.65], [23.0, 68.75], [23.25, 68.65], [23.5, 68.75], [23.75, 68.65], [24.0, 68.75], [24.25, 68.65], [24.5, 68.75], [24.75, 68.65], [25.0, 68.75], [25.53, 68.53], [25.75, 68.0], [25.53, 67.47], [25.18, 67.32], [25.04, 67.0], [25.25, 66.5], [25.15, 66.25], [25.25, 66.0], [25.15, 65.75], [25.18, 65.68], [25.53, 65.53], [25.68, 65.18], [26.03, 65.03], [26.25, 64.5], [26.03, 63.97], [25.68, 63.82], [25.53, 63.47], [25.0, 63.25], [24.75, 63.35], [24.5, 63.25], [24.25, 63.35], [24.0, 63.25], [23.75, 63.35], [23.68, 63.32], [23.53, 62.97], [23.0, 62.75], [22.75, 62.85], [22.68, 62.82], [22.53, 62.47], [22.0, 62.25], [21.75, 62.35], [21.68, 62.32], [21.65, 62.25], [21.75, 62.0], [21.65, 61.75], [21.75, 61.5], [21.53, 60.97], [21.0, 60.75], [20.47, 60.97], [20.25, 61.5], [20.35, 61.75], [20.32, 61.82], [19.97, 61.97], [19.75, 62.5], [19.97, 63.03], [20.32, 63.18], [20.46, 63.5], [20.25, 64.0], [20.47, 64.53], [20.82, 64.68], [20.85, 64.75], [20.75, 65.0], [20.88, 65.3], [20.75, 65.35], [20.5, 65.25], [20.25, 65.35], [20.0, 65.25], [19.75, 65.35], [19.5, 65.25], [19.25, 65.35], [19.0, 65.25], [18.75, 65.35], [18.5, 65.25], [18.25, 65.35], [18.0, 65.25], [17.75, 65.35], [17.5, 65.25], [17.25, 65.35], [17.0, 65.25], [16.75, 65.35], [16.5, 65.25], [15.97, 65.47], [15.82, 65.82], [15.75, 65.85], [15.5, 65.75], [15.25, 65.85], [15.18, 65.82], [15.03, 65.47], [14.5, 65.25], [14.25, 65.35], [14.18, 65.32], [14.03, 64.97], [13.5, 64.75], [13.25, 64.85], [13.0, 64.75], [12.47, 64.97], [12.32, 65.32], [11.97, 65.47], [11.75, 66.0], [11.85, 66.25], [11.75, 66.5]], [[22.25, 64.35], [22.18, 64.32], [22.13, 64.2], [22.25, 64.15], [22.32, 64.18], [22.38, 64.3], [22.25, 64.35]], [[23.2, 65.13], [23.32, 65.18], [23.35, 65.25], [23.32, 65.32], [23.25, 65.35], [23.18, 65.32], [23.15, 65.25], [23.2, 65.13]], [[21.75, 66.65], [21.82, 66.68], [21.88, 66.8], [21.75, 66.85], [21.63, 66.8], [21.68, 66.68], [21.75, 66.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.143340945160418}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.2343136693865}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.38328290614737, -19.63086528253197, -18.739147453791304, -17.846967265958796]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.884374474671205, -27.48038249035764, -26.05699511962311, -24.720003012036642]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.25950138529197, -11.909104220625617, -11.247373326207063, -10.42312053364969]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-14.194559765149904, -18.143340945160418, -16.261984874881364, -13.683741458705498]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.74839754882713, -1.8543991318059492, -1.8040436536196067, -1.7284314718771558]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2017297546175936, -2.6173020418305692, -2.31691013163233, -2.473774653586187]}}