{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:37.316039", "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-Sep-12_to_2025-Sep-17_54.0_39.5"}, "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": 2025090000364}, "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": "September 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 98280.49661018647}, "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": ["Turkmenistan"]}, "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": ["Caspian 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": 39.5}, "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": 54.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "54.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 51.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 57.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[56.5, 40.25], [56.75, 40.15], [57.0, 40.25], [57.53, 40.03], [57.68, 39.68], [58.03, 39.53], [58.25, 39.0], [58.03, 38.47], 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 39.0], [50.97, 39.53], [51.5, 39.75], [51.75, 39.65], [52.0, 39.75], [52.3, 39.63], [52.47, 40.03], [53.0, 40.25], [53.53, 40.03], [53.75, 39.5], [53.53, 38.97], [53.0, 38.75], [52.7, 38.88], [52.53, 38.47], [52.18, 38.32], [52.03, 37.97], [51.5, 37.75], [50.97, 37.97], [50.75, 38.5], [50.85, 38.75], [50.75, 39.0]]]]}, "2025-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.97, 39.53], [51.5, 39.75], [51.75, 39.65], [51.82, 39.68], [51.85, 39.75], [51.75, 40.0], [51.97, 40.53], [52.5, 40.75], [52.75, 40.65], [53.0, 40.75], [53.25, 40.65], [53.5, 40.75], [54.03, 40.53], [54.18, 40.18], [54.53, 40.03], [54.75, 39.5], [54.53, 38.97], [54.18, 38.82], [54.03, 38.47], [53.5, 38.25], [53.25, 38.35], [53.0, 38.25], [52.75, 38.35], [52.5, 38.25], [52.25, 38.35], [52.18, 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"description": "The daily evolution of mean t2m anomalies.", "value": [-2.9418895049807503, -2.861160140817483, -4.314069024765377, -5.645501449057037, -4.151487202550394, -4.312234780406328]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5126230105349237, -4.471917037563912, -6.5191068737634055, -7.913945242452996, -6.474537765697221, -5.130247265146863]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6734233994104284, -1.4489946499865438, -1.9186777082870528, -2.471959912847762, -1.6893036694772723, -1.587973754452124]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.00677263626777, -1.8216231018876299, -2.6143994280191083, -3.1577594339633466, -2.388252876839901, -1.8551588522886744]}}