{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:16.497881", "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": "2025-Jul-04_to_2025-Jul-06_36.0_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": 2025070000294}, "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": "July 04 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 06 2025"}, "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": 52055.8118949522}, "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": ["Russian Federation"]}, "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": ["White 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": 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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 33.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 39.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.0}, "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": [[[[32.25, 67.5], [32.35, 67.75], [32.25, 68.0], [32.47, 68.53], [33.0, 68.75], [33.25, 68.65], [33.5, 68.75], [33.75, 68.65], 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regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.25, 67.0], [32.35, 67.25], [32.25, 67.5], [32.35, 67.75], [32.25, 68.0], [32.47, 68.53], [33.0, 68.75], [33.25, 68.65], [33.5, 68.75], [33.75, 68.65], [34.0, 68.75], [34.25, 68.65], [34.5, 68.75], [34.75, 68.65], [35.0, 68.75], [35.53, 68.53], [35.68, 68.18], [35.75, 68.15], [36.0, 68.25], [36.25, 68.15], [36.5, 68.25], [37.03, 68.03], [37.18, 67.68], [37.25, 67.65], [37.5, 67.75], [37.75, 67.65], [38.0, 67.75], [38.25, 67.65], [38.5, 67.75], [38.75, 67.65], [39.0, 67.75], [39.53, 67.53], [39.75, 67.0], [39.65, 66.75], [39.75, 66.5], [39.65, 66.25], [39.75, 66.0], [39.53, 65.47], [39.0, 65.25], [38.75, 65.35], [38.5, 65.25], [37.97, 65.47], [37.82, 65.82], [37.75, 65.85], [37.5, 65.75], [37.25, 65.85], [37.0, 65.75], [36.75, 65.85], 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.068266805013025, 4.6262921651204465, 4.5270922342936615]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.678555796214628, -6.559503863125295, -6.872726593226129]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.681876441590077, -7.766910878688577, -8.253012071461512]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4716778880477717, -1.6827244661324592, -1.7657514268764372]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8129956727820418, -1.9667425977961177, -2.1706458501888517]}}