{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:24.860909", "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-Feb-09_to_2025-Feb-13_58.0_36.0"}, "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": 2025020000258}, "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": "February 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 13 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 72580.90807232427}, "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": ["Iran, Islamic Republic of"]}, "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": 36.0}, "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": 58.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "58.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 56.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 61.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[60.25, 37.15], [60.5, 37.25], [60.75, 37.15], [61.0, 37.25], [61.53, 37.03], [61.75, 36.5], [61.54, 36.0], [61.75, 35.5], 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each time step", "value": {"2025-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[59.35, 36.25], [59.25, 36.5], [59.47, 37.03], [60.0, 37.25], [60.25, 37.15], [60.5, 37.25], [60.75, 37.15], [61.0, 37.25], [61.53, 37.03], [61.75, 36.5], [61.54, 36.0], [61.75, 35.5], [61.65, 35.25], [61.75, 35.0], [61.53, 34.47], [61.18, 34.32], [61.03, 33.97], [60.5, 33.75], [59.97, 33.97], [59.75, 34.5], [59.88, 34.8], [59.47, 34.97], [59.25, 35.5], [59.35, 35.75], [59.25, 36.0], [59.35, 36.25]]], [[[55.47, 36.03], [55.82, 36.18], [55.97, 36.53], [56.32, 36.68], [56.47, 37.03], [57.0, 37.25], [57.25, 37.15], [57.5, 37.25], [58.03, 37.03], [58.18, 36.68], [58.53, 36.53], [58.75, 36.0], [58.53, 35.47], [58.0, 35.25], [57.75, 35.35], [57.5, 35.25], [57.25, 35.35], [57.18, 35.32], [57.03, 34.97], [56.68, 34.82], [56.53, 34.47], [56.0, 34.25], [55.47, 34.47], [55.25, 35.0], [55.35, 35.25], [55.25, 35.5], [55.47, 36.03]]]]}, "2025-02-10T11:30:00.000000000": {"type": "MultiPolygon", 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.684456163239865}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.6233916165535334, -4.417754938410553, -4.358167964014513, -5.051225195990639, -0.43844833374021164]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.749248250325479, -9.591406885782874, -12.014838282267249, -9.960866038004554, -0.43844833374021164]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.361925850577172, -8.17785902497319, -8.202849270572003, -7.574849259354626, -5.114552559211177]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.09758091041374, -10.59327094823476, -12.040655041889636, 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