{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:27.080273", "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-26_to_2025-Jul-29_60.0_48.0"}, "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": 2025070000990}, "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 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 29 2025"}, "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": 132661.9698731222}, "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": ["Kazakhstan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 48.0}, "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": 60.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "60.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 57.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 63.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[57.25, 48.65], [57.32, 48.68], [57.46, 49.0], [57.25, 49.5], [57.35, 49.75], [57.25, 50.0], [57.47, 50.53], [57.82, 50.68], 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"W.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[57.25, 50.0], [57.47, 50.53], [57.82, 50.68], [57.97, 51.03], [58.5, 51.25], [58.75, 51.15], [59.0, 51.25], [59.25, 51.15], [59.5, 51.25], [59.75, 51.15], [60.0, 51.25], [60.25, 51.15], [60.5, 51.25], [60.75, 51.15], [61.0, 51.25], [61.53, 51.03], [61.68, 50.68], [62.03, 50.53], [62.18, 50.18], [62.53, 50.03], [62.68, 49.68], [63.03, 49.53], [63.25, 49.0], [63.03, 48.47], [62.5, 48.25], [62.25, 48.35], [62.13, 48.3], [62.25, 48.0], [62.03, 47.47], [61.5, 47.25], [61.25, 47.35], [61.18, 47.32], [61.03, 46.97], [60.5, 46.75], [59.97, 46.97], [59.82, 47.32], [59.75, 47.35], [59.5, 47.25], [59.25, 47.35], [59.0, 47.25], [58.47, 47.47], [58.32, 47.82], [58.25, 47.85], [58.0, 47.75], [57.47, 47.97], [57.25, 48.5], [57.46, 49.0], [57.25, 49.5], [57.35, 49.75], [57.25, 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