{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:51.508077", "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-Jan-02_to_2025-Jan-05_55.0_30.5"}, "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": 2025010000120}, "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": "January 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 05 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": 174599.88673538982}, "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": 30.5}, "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": 55.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "55.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 58.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[52.75, 30.0], [52.85, 30.25], [52.82, 30.32], [52.47, 30.47], [52.25, 31.0], [52.47, 31.53], [53.0, 31.75], [53.25, 31.65], 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affected", "value": ["W.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.85, 29.75], [52.75, 30.0], [52.85, 30.25], [52.82, 30.32], [52.47, 30.47], [52.25, 31.0], [52.47, 31.53], [53.0, 31.75], [53.25, 31.65], [53.5, 31.75], [53.75, 31.65], [53.82, 31.68], [53.97, 32.03], [54.5, 32.25], [55.03, 32.03], [55.18, 31.68], [55.25, 31.65], [55.32, 31.68], [55.35, 31.75], [55.25, 32.0], [55.47, 32.53], [56.0, 32.75], [56.53, 32.53], [56.68, 32.18], [57.03, 32.03], [57.18, 31.68], [57.53, 31.53], [57.75, 31.0], [57.65, 30.75], [57.68, 30.68], [58.03, 30.53], [58.18, 30.18], [58.53, 30.03], [58.75, 29.5], [58.65, 29.25], [58.75, 29.0], [58.53, 28.47], [58.0, 28.25], [57.75, 28.35], [57.5, 28.25], [57.0, 28.46], [56.5, 28.25], [56.25, 28.35], [56.0, 28.25], [55.75, 28.35], [55.5, 28.25], [55.0, 28.46], [54.5, 28.25], 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duration", "value": -12.984266213930823}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.511618891005632}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.8146568402140701, -0.4173950586563251, 0.2849209516476776, 3.169424797506906]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.929427846272745, -9.823403422037757, -7.947114054361975, -5.268769327799475]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.328377659935957, -7.434243308948814, -6.594719793339707, -4.852991670546576]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.17623887136341, -12.984266213930823, -11.526701420713607, -8.208296887954361]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8632606554574769, -2.304348417412556, -2.0346596269683204, -1.520864261078323]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.826316506106725, -3.6673066705203756, -3.0822589140024985, -2.0656787073998992]}}