{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:04.099502", "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": "2021-Jul-12_to_2021-Jul-15_262.5_31.0"}, "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": 2021070000568}, "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 12 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 15 2021"}, "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": 73890.90206161211}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 31.0}, "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": 262.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "262.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 261.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-97.0, 29.75], [-97.25, 29.854], [-97.5, 29.75], [-97.75, 29.854], [-98.0, 29.75], [-98.25, 29.854], [-98.5, 29.75], [-99.03, 29.97], [-99.177, 30.323], [-99.53, 30.47], [-99.75, 31.0], [-99.646, 31.25], [-99.75, 31.5], [-99.646, 31.75], [-99.75, 32.0], [-99.53, 32.53], [-99.0, 32.75], [-98.75, 32.646], [-98.5, 32.75], [-98.25, 32.646], [-98.177, 32.677], [-98.03, 33.03], [-97.5, 33.25], [-97.25, 33.146], [-97.0, 33.25], [-96.47, 33.03], [-96.323, 32.677], [-95.97, 32.53], [-95.823, 32.177], [-95.47, 32.03], [-95.323, 31.677], [-95.25, 31.646], [-95.0, 31.75], [-94.47, 31.53], [-94.25, 31.0], [-94.47, 30.47], [-95.0, 30.25], [-95.25, 30.354], [-95.5, 30.25], [-95.75, 30.354], [-96.0, 30.25], [-96.25, 30.354], [-96.323, 30.323], [-96.47, 29.97], [-97.0, 29.75]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-12T11:30:00.000000000": {"type": "Polygon", "coordinates": 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2374036978394245}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.120847504278856, 26.051660452677822, 26.07686755451465, 26.669904803116424]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.490478841905542, 25.142322579062863, 25.52623499279366, 26.25214161161756]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.199155536893404, -3.295606456849614, -3.303866009980443, -2.9349445121212696]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.979504605995544, -4.004786847758112, -3.7447094560643563, -3.1496983023675966]}, "anom_scaled_evo_areamean": {"name": "Evolution 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