{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:20.962135", "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": "2023-Jul-15_to_2023-Jul-17_257.5_49.5"}, "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": 2023070000462}, "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 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 17 2023"}, "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": 86109.52153546602}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 49.5}, "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": 257.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 255.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-105.53, 51.53], [-105.0, 51.75], [-104.75, 51.65], [-104.5, 51.75], [-104.25, 51.65], [-104.0, 51.75], [-103.47, 51.53], [-103.32, 51.18], [-103.25, 51.15], [-103.0, 51.25], [-102.75, 51.15], [-102.5, 51.25], [-102.25, 51.15], [-102.0, 51.25], [-101.75, 51.15], [-101.5, 51.25], [-100.97, 51.03], [-100.82, 50.68], [-100.75, 50.65], [-100.5, 50.75], [-100.25, 50.65], [-100.0, 50.75], [-99.47, 50.53], [-99.25, 50.0], [-99.35, 49.75], [-99.32, 49.68], [-98.97, 49.53], [-98.82, 49.18], [-98.75, 49.15], [-98.5, 49.25], [-98.25, 49.15], [-98.0, 49.25], [-97.47, 49.03], [-97.25, 48.5], [-97.47, 47.97], [-98.0, 47.75], [-98.25, 47.85], [-98.5, 47.75], [-98.75, 47.85], [-99.0, 47.75], [-99.25, 47.85], [-99.5, 47.75], [-99.75, 47.85], [-100.0, 47.75], [-100.25, 47.85], [-100.5, 47.75], [-101.03, 47.97], [-101.18, 48.32], [-101.25, 48.35], [-101.32, 48.32], [-101.47, 47.97], [-102.0, 47.75], [-102.53, 47.97], [-102.68, 48.32], [-102.75, 48.35], [-103.0, 48.25], [-103.53, 48.47], [-103.68, 48.82], [-103.75, 48.85], [-104.0, 48.75], [-104.53, 48.97], [-104.75, 49.5], [-104.65, 49.75], [-104.68, 49.82], [-105.03, 49.97], [-105.18, 50.32], [-105.53, 50.47], [-105.75, 51.0], [-105.53, 51.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.E.North-America", "W.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.53, 50.47], [-105.75, 51.0], [-105.53, 51.53], [-105.0, 51.75], [-104.75, 51.65], [-104.5, 51.75], [-104.25, 51.65], [-104.0, 51.75], [-103.47000000000003, 51.53], [-103.32, 51.18], [-103.25, 51.15], [-103.0, 51.25], [-102.75, 51.15], [-102.5, 51.25], [-102.25, 51.15], [-102.0, 51.25], [-101.75, 51.15], [-101.5, 51.25], [-100.97000000000003, 51.03], [-100.82, 50.68], [-100.75, 50.65], [-100.5, 50.75], [-100.25, 50.65], [-100.0, 50.75], [-99.47000000000003, 50.53], [-99.25, 50.0], [-99.35000000000002, 49.75], [-99.32, 49.68], [-98.97000000000003, 49.53], [-98.82, 49.18], [-98.75, 49.15], [-98.5, 49.25], [-98.25, 49.15], [-98.0, 49.25], [-97.47000000000003, 49.03], [-97.25, 48.5], [-97.47000000000003, 47.97], [-98.0, 47.75], [-98.25, 47.85], [-98.5, 47.75], [-98.75, 47.85], [-99.0, 47.75], [-99.25, 47.85], [-99.5, 47.75], [-99.75, 47.85], [-100.0, 47.75], [-100.25, 47.85], [-100.5, 47.75], [-101.02999999999997, 47.97], [-101.18, 48.32], [-101.25, 48.35], [-101.32, 48.32], [-101.47000000000003, 47.97], [-102.0, 47.75], [-102.52999999999997, 47.97], [-102.68, 48.32], [-102.75, 48.35], [-103.0, 48.25], [-103.52999999999997, 48.47], [-103.68, 48.82], [-103.75, 48.85], [-104.0, 48.75], [-104.53, 48.97], [-104.75, 49.5], [-104.65, 49.75], [-104.68, 49.82], [-105.03, 49.97], [-105.18, 50.32], [-105.53, 50.47]]]]}, "2023-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.53, 50.47], [-105.75, 51.0], [-105.53, 51.53], [-105.0, 51.75], [-104.75, 51.65], [-104.5, 51.75], 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evolution of mean t2m.", "value": [14.86771108165118, 14.610824994919426, 14.761531834370487]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.663375386929431, 12.97344623348721, 13.721507074279486]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.314485612510787, -4.6141420542472105, -4.444971969919474]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.833565187603028, -5.344343249441181, -5.762845580268333]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4584532250243152, -1.5934649317941292, -1.5254342840783435]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.639640056850364, -1.8069297636845256, -1.921305040862923]}}