{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:55.523176", "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-Aug-31_to_2021-Sep-03_225.5_71.5"}, "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": 2021080001322}, "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": "August 31 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 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": 54498.47972956972}, "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": ["Canada"]}, "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": 71.5}, "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": 225.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "225.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 223.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 235.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 71.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-137.53, 72.03], [-137.0, 72.25], [-136.75, 72.15], [-136.5, 72.25], [-136.25, 72.15], [-136.0, 72.25], [-135.75, 72.15], [-135.5, 72.25], [-135.25, 72.15], [-135.0, 72.25], [-134.75, 72.15], [-134.68, 72.18], [-134.53, 72.53], [-134.0, 72.75], [-133.75, 72.65], [-133.5, 72.75], [-133.25, 72.65], [-133.0, 72.75], [-132.5, 72.54], [-132.0, 72.75], [-131.75, 72.65], [-131.5, 72.75], [-131.25, 72.65], [-131.0, 72.75], [-130.75, 72.65], [-130.68, 72.68], [-130.53, 73.03], [-130.18, 73.18], [-130.03, 73.53], [-129.5, 73.75], [-129.25, 73.65], [-129.0, 73.75], [-128.75, 73.65], [-128.68, 73.68], [-128.53, 74.03], [-128.0, 74.25], [-127.75, 74.15], [-127.5, 74.25], [-127.25, 74.15], [-127.0, 74.25], [-126.75, 74.15], [-126.5, 74.25], [-126.25, 74.15], [-126.0, 74.25], [-125.75, 74.15], [-125.5, 74.25], [-125.25, 74.15], [-125.0, 74.25], [-124.75, 74.15], [-124.5, 74.25], [-123.97, 74.03], [-123.75, 73.5], [-123.97, 72.97], [-124.32, 72.82], [-124.47, 72.47], [-125.0, 72.25], [-125.25, 72.35], [-125.32, 72.32], [-125.47, 71.97], [-126.0, 71.75], [-126.25, 71.85], [-126.5, 71.75], [-126.75, 71.85], [-126.82, 71.82], [-126.97, 71.47], [-127.5, 71.25], [-127.75, 71.35], [-127.82, 71.32], [-127.97, 70.97], [-128.5, 70.75], [-128.75, 70.85], [-129.0, 70.75], [-129.25, 70.85], [-129.5, 70.75], [-129.75, 70.85], [-130.0, 70.75], [-130.25, 70.85], [-130.5, 70.75], [-130.75, 70.85], [-131.0, 70.75], [-131.25, 70.85], [-131.5, 70.75], [-131.75, 70.85], [-132.0, 70.75], [-132.25, 70.85], [-132.5, 70.75], [-132.75, 70.85], [-133.0, 70.75], [-133.25, 70.85], [-133.5, 70.75], [-133.75, 70.85], [-134.0, 70.75], [-134.25, 70.85], [-134.5, 70.75], [-134.75, 70.85], [-135.0, 70.75], [-135.25, 70.85], [-135.5, 70.75], [-135.75, 70.85], [-136.0, 70.75], [-136.25, 70.85], [-136.5, 70.75], [-136.75, 70.85], [-137.0, 70.75], [-137.53, 70.97], [-137.75, 71.5], [-137.53, 72.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "Arctic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary 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t2m", "description": "The daily evolution of mean t2m.", "value": [-1.4803491088146075, -2.517827243611805, -2.189890983001078, -2.6489742520290065]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.607200066871144, -2.8706081405728696, -3.2793039585446877, -3.211839442303301]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.411666357441298, -3.1371362917551795, -2.721896767510219, -3.0680048189248987]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.525184226854549, -4.408357612227292, -3.724412419298062, -3.7601507264541283]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1519907402720928, 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