{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-31 15:31:34.107547", "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": "2026-Jul-21_to_2026-Jul-23_26.0_59.0"}, "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": 2026070000734}, "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": true}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "July 21 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 23 2026"}, "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": 59041.38542065257}, "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": ["Estonia", "Latvia", "Russian Federation"]}, "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": ["Asia", "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": ["Gulf of Finland"]}, "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": 59.0}, "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": 26.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 59.53], [24.0, 59.75], [24.25, 59.65], [24.5, 59.75], 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"2026-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 59.53], [24.0, 59.75], [24.25, 59.65], [24.5, 59.75], [24.75, 59.65], [24.82, 59.68], [24.97, 60.03], [25.5, 60.25], [25.75, 60.15], [26.0, 60.25], [26.25, 60.15], [26.5, 60.25], [26.75, 60.15], [27.0, 60.25], [27.5, 60.04], [28.0, 60.25], [28.25, 60.15], [28.5, 60.25], [28.75, 60.15], [29.0, 60.25], [29.25, 60.15], [29.5, 60.25], [29.75, 60.15], [30.0, 60.25], [30.25, 60.15], [30.5, 60.25], [30.75, 60.15], [31.0, 60.25], [31.53, 60.03], [31.75, 59.5], [31.53, 58.97], [31.0, 58.75], [30.75, 58.85], [30.68, 58.82], [30.53, 58.47], [30.0, 58.25], [29.75, 58.35], [29.5, 58.25], [29.25, 58.35], [29.18, 58.32], [29.03, 57.97], [28.5, 57.75], [28.25, 57.85], [28.0, 57.75], [27.5, 57.96], [27.0, 57.75], [26.75, 57.85], [26.68, 57.82], [26.53, 57.47], [26.0, 57.25], [25.75, 57.35], [25.5, 57.25], [25.25, 57.35], [25.0, 57.25], [24.75, 57.35], [24.5, 57.25], [23.97, 57.47], [23.82, 57.82], [23.47, 57.97], 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maximum t2m anomalies.", "value": [-5.636797090979769, -5.1661608916859905, -3.853516096803446]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7927862148162197, -1.662989853293388, -1.3403933083148951]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.211706967232244, -1.9938168782805872, -1.4920155564040662]}}