{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:04.685407", "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-Apr-06_to_2025-Apr-08_264.5_29.0"}, "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": 2025040000210}, "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": "April 06 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 08 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": 54384.36115344147}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 29.0}, "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": 264.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "264.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 261.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.15, 27.25], [-99.25, 27.5], [-99.03, 28.03], [-98.68, 28.18], [-98.53, 28.53], [-98.18, 28.68], [-98.15, 28.75], [-98.25, 29.0], [-98.03, 29.53], [-97.5, 29.75], [-96.97, 29.53], [-96.82, 29.18], [-96.75, 29.15], [-96.68, 29.18], [-96.53, 29.53], [-96.18, 29.68], [-96.15, 29.75], [-96.25, 30.0], [-96.03, 30.53], [-95.5, 30.75], [-95.25, 30.65], [-95.0, 30.75], [-94.75, 30.65], [-94.5, 30.75], [-93.97, 30.53], [-93.75, 30.0], [-93.97, 29.47], [-94.32, 29.32], [-94.47, 28.97], [-94.82, 28.82], [-94.97, 28.47], [-95.5, 28.25], [-95.75, 28.35], [-95.82, 28.32], [-95.97, 27.97], [-96.5, 27.75], [-96.75, 27.85], [-96.82, 27.82], [-96.85, 27.75], [-96.75, 27.5], [-96.85, 27.25], [-96.75, 27.0], [-96.97, 26.47], [-97.5, 26.25], [-97.75, 26.35], [-97.82, 26.32], [-97.97, 25.97], [-98.5, 25.75], [-99.03, 25.97], [-99.25, 26.5], [-99.15, 26.75], [-99.25, 27.0], [-99.15, 27.25]]]]}, "2025-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.15, 27.25], [-99.25, 27.5], [-99.03, 28.03], [-98.68, 28.18], [-98.53, 28.53], [-98.18, 28.68], [-98.15, 28.75], [-98.25, 29.0], [-98.03, 29.53], [-97.5, 29.75], [-96.97, 29.53], [-96.82, 29.18], [-96.75, 29.15], [-96.68, 29.18], [-96.53, 29.53], [-96.18, 29.68], [-96.15, 29.75], [-96.25, 30.0], [-96.03, 30.53], [-95.5, 30.75], [-95.25, 30.65], [-95.0, 30.75], [-94.75, 30.65], [-94.5, 30.75], [-93.97, 30.53], [-93.75, 30.0], [-93.97, 29.47], [-94.32, 29.32], [-94.47, 28.97], [-94.82, 28.82], [-94.97, 28.47], [-95.5, 28.25], [-95.75, 28.35], [-95.82, 28.32], [-95.97, 27.97], [-96.5, 27.75], [-96.75, 27.85], [-96.82, 27.82], [-96.85, 27.75], [-96.75, 27.5], [-96.85, 27.25], [-96.75, 27.0], [-96.97, 26.47], [-97.5, 26.25], [-97.75, 26.35], [-97.82, 26.32], [-97.97, 25.97], [-98.5, 25.75], [-99.03, 25.97], [-99.25, 26.5], [-99.15, 26.75], [-99.25, 27.0], [-99.15, 27.25]]]]}, "2025-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.15, 27.25], [-99.25, 27.5], [-99.03, 28.03], [-98.68, 28.18], [-98.53, 28.53], [-98.18, 28.68], [-98.15, 28.75], [-98.25, 29.0], [-98.03, 29.53], [-97.5, 29.75], [-96.97, 29.53], [-96.82, 29.18], [-96.75, 29.15], [-96.68, 29.18], [-96.53, 29.53], [-96.18, 29.68], [-96.15, 29.75], [-96.25, 30.0], [-96.03, 30.53], [-95.5, 30.75], [-95.25, 30.65], [-95.0, 30.75], [-94.75, 30.65], [-94.5, 30.75], [-93.97, 30.53], [-93.75, 30.0], [-93.97, 29.47], [-94.32, 29.32], [-94.47, 28.97], [-94.82, 28.82], [-94.97, 28.47], [-95.5, 28.25], [-95.75, 28.35], [-95.82, 28.32], [-95.97, 27.97], [-96.5, 27.75], [-96.75, 27.85], [-96.82, 27.82], [-96.85, 27.75], [-96.75, 27.5], [-96.85, 27.25], [-96.75, 27.0], [-96.97, 26.47], [-97.5, 26.25], [-97.75, 26.35], [-97.82, 26.32], [-97.97, 25.97], [-98.5, 25.75], [-99.03, 25.97], [-99.25, 26.5], [-99.15, 26.75], [-99.25, 27.0], [-99.15, 27.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.921889411688085}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.820970790385648}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.541859181722032, 14.424048868815134, 16.5428240458171]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.017359670003259, 11.790373738606775, 14.362526194254599]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.702330428104102, -6.909187342314434, -4.8513946007384074]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.118485762826197, -7.921889411688085, -5.416315929675704]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7426949554309796, -2.132728547396069, -1.4762701429270304]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1205252567363426, -2.541356725735063, -1.6373119535910057]}}