{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:46.686939", "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-Jun-15_to_2023-Jun-17_297.5_56.0"}, "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": 2023060000550}, "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": "June 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 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": 52610.15890806196}, "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": 56.0}, "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": 297.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "297.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 294.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 299.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-66.75, 55.5], [-66.53, 56.03], [-66.0, 56.25], [-65.75, 56.15], [-65.5, 56.25], [-65.25, 56.15], [-65.0, 56.25], [-64.75, 56.15], [-64.68, 56.18], [-64.53, 56.53], [-64.0, 56.75], [-63.75, 56.65], [-63.68, 56.68], [-63.53, 57.03], [-63.0, 57.25], [-62.75, 57.15], [-62.5, 57.25], [-62.25, 57.15], [-62.0, 57.25], [-61.47, 57.03], [-61.32, 56.68], [-60.97, 56.53], [-60.75, 56.0], [-60.85, 55.75], [-60.82, 55.68], [-60.75, 55.65], [-60.5, 55.75], [-59.97, 55.53], [-59.75, 55.0], [-59.85, 54.75], [-59.75, 54.5], [-59.97, 53.97], [-60.5, 53.75], [-60.75, 53.85], [-61.0, 53.75], [-61.25, 53.85], [-61.5, 53.75], [-61.75, 53.85], [-62.0, 53.75], [-62.25, 53.85], [-62.5, 53.75], [-63.03, 53.97], [-63.18, 54.32], [-63.53, 54.47], [-63.68, 54.82], [-63.75, 54.85], [-64.0, 54.75], [-64.25, 54.85], [-64.5, 54.75], [-64.75, 54.85], [-65.0, 54.75], [-65.25, 54.85], [-65.5, 54.75], [-65.75, 54.85], [-66.0, 54.75], [-66.53, 54.97], [-66.75, 55.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.0, 54.75], [-66.52999999999997, 54.97], [-66.75, 55.5], [-66.52999999999997, 56.03], [-66.0, 56.25], [-65.75, 56.15], [-65.5, 56.25], [-65.25, 56.15], [-65.0, 56.25], [-64.75, 56.15], [-64.68, 56.18], [-64.52999999999997, 56.53], [-64.0, 56.75], [-63.75, 56.65], [-63.68000000000001, 56.68], [-63.52999999999997, 57.03], [-63.0, 57.25], [-62.75, 57.15], [-62.5, 57.25], [-62.25, 57.15], [-62.0, 57.25], [-61.47000000000003, 57.03], [-61.31999999999999, 56.68], [-60.97000000000003, 56.53], [-60.75, 56.0], [-60.85000000000002, 55.75], [-60.81999999999999, 55.68], [-60.75, 55.65], [-60.5, 55.75], [-59.97000000000003, 55.53], [-59.75, 55.0], [-59.85000000000002, 54.75], [-59.75, 54.5], [-59.97000000000003, 53.97], [-60.5, 53.75], [-60.75, 53.85], [-61.0, 53.75], [-61.25, 53.85], [-61.5, 53.75], [-61.75, 53.85], [-62.0, 53.75], [-62.25, 53.85], [-62.5, 53.75], [-63.02999999999997, 53.97], [-63.18000000000001, 54.32], [-63.52999999999997, 54.47], [-63.68000000000001, 54.82], [-63.75, 54.85], [-64.0, 54.75], [-64.25, 54.85], [-64.5, 54.75], [-64.75, 54.85], [-65.0, 54.75], [-65.25, 54.85], [-65.5, 54.75], [-65.75, 54.85], [-66.0, 54.75]]]]}, "2023-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.0, 54.75], [-66.52999999999997, 54.97], [-66.75, 55.5], [-66.52999999999997, 56.03], [-66.0, 56.25], [-65.75, 56.15], [-65.5, 56.25], [-65.25, 56.15], [-65.0, 56.25], [-64.75, 56.15], [-64.68, 56.18], [-64.52999999999997, 56.53], [-64.0, 56.75], [-63.75, 56.65], [-63.68000000000001, 56.68], [-63.52999999999997, 57.03], [-63.0, 57.25], [-62.75, 57.15], [-62.5, 57.25], [-62.25, 57.15], [-62.0, 57.25], [-61.47000000000003, 57.03], [-61.31999999999999, 56.68], [-60.97000000000003, 56.53], [-60.75, 56.0], [-60.85000000000002, 55.75], [-60.81999999999999, 55.68], [-60.75, 55.65], [-60.5, 55.75], [-59.97000000000003, 55.53], [-59.75, 55.0], [-59.85000000000002, 54.75], [-59.75, 54.5], [-59.97000000000003, 53.97], [-60.5, 53.75], [-60.75, 53.85], [-61.0, 53.75], [-61.25, 53.85], [-61.5, 53.75], [-61.75, 53.85], [-62.0, 53.75], [-62.25, 53.85], [-62.5, 53.75], [-63.02999999999997, 53.97], [-63.18000000000001, 54.32], [-63.52999999999997, 54.47], [-63.68000000000001, 54.82], [-63.75, 54.85], [-64.0, 54.75], [-64.25, 54.85], [-64.5, 54.75], [-64.75, 54.85], [-65.0, 54.75], [-65.25, 54.85], [-65.5, 54.75], [-65.75, 54.85], [-66.0, 54.75]]]]}, "2023-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.0, 54.75], [-66.52999999999997, 54.97], [-66.75, 55.5], [-66.52999999999997, 56.03], [-66.0, 56.25], [-65.75, 56.15], [-65.5, 56.25], [-65.25, 56.15], [-65.0, 56.25], [-64.75, 56.15], [-64.68, 56.18], [-64.52999999999997, 56.53], [-64.0, 56.75], [-63.75, 56.65], [-63.68000000000001, 56.68], [-63.52999999999997, 57.03], [-63.0, 57.25], [-62.75, 57.15], [-62.5, 57.25], [-62.25, 57.15], [-62.0, 57.25], [-61.47000000000003, 57.03], [-61.31999999999999, 56.68], [-60.97000000000003, 56.53], [-60.75, 56.0], [-60.85000000000002, 55.75], [-60.81999999999999, 55.68], [-60.75, 55.65], [-60.5, 55.75], [-59.97000000000003, 55.53], [-59.75, 55.0], [-59.85000000000002, 54.75], [-59.75, 54.5], [-59.97000000000003, 53.97], [-60.5, 53.75], [-60.75, 53.85], [-61.0, 53.75], [-61.25, 53.85], [-61.5, 53.75], [-61.75, 53.85], [-62.0, 53.75], [-62.25, 53.85], [-62.5, 53.75], [-63.02999999999997, 53.97], [-63.18000000000001, 54.32], [-63.52999999999997, 54.47], [-63.68000000000001, 54.82], [-63.75, 54.85], [-64.0, 54.75], [-64.25, 54.85], [-64.5, 54.75], [-64.75, 54.85], [-65.0, 54.75], [-65.25, 54.85], [-65.5, 54.75], [-65.75, 54.85], [-66.0, 54.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.6197050976074365}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.455472124217029}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.542243590046553, 1.3343627919064147, 2.7094184709123397]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.2064160408614839, -0.07197501782547988, 1.4789333448691764]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.320012352472073, -7.0157566316669016, -6.03064738851211]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.246363773504356, -7.6197050976074365, -7.26122444881122]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4660980534415224, -1.6182653702200578, -1.3761370292388777]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6962371499407622, -1.7403976915349686, -1.559975714793867]}}