{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:25.637996", "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-07_to_2021-Jul-09_289.5_48.5"}, "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": 2021070000350}, "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 07 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2021"}, "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": 51167.55962450385}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "N.E.North-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": 48.5}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 288.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.75, 49.5], [-71.53, 50.03], [-71.18, 50.18], [-71.03, 50.53], [-70.5, 50.75], [-70.25, 50.65], [-70.18, 50.68], [-70.15, 50.75], [-70.25, 51.0], [-70.03, 51.53], [-69.5, 51.75], [-69.25, 51.65], [-69.12, 51.7], [-69.25, 52.0], [-69.03, 52.53], [-68.5, 52.75], [-68.25, 52.65], [-68.0, 52.75], [-67.75, 52.65], [-67.5, 52.75], [-67.25, 52.65], [-67.18, 52.68], [-67.03, 53.03], [-66.5, 53.25], [-66.25, 53.15], [-66.0, 53.25], [-65.47, 53.03], [-65.25, 52.5], [-65.47, 51.97], [-65.82, 51.82], [-65.97, 51.47], [-66.5, 51.25], [-66.75, 51.35], [-66.82, 51.32], [-66.97, 50.97], [-67.32, 50.82], [-67.47, 50.47], [-68.0, 50.25], [-68.25, 50.35], [-68.5, 50.25], [-68.75, 50.35], [-68.82, 50.32], [-68.97, 49.97], [-69.32, 49.82], [-69.35, 49.75], [-69.25, 49.5], [-69.35, 49.25], [-69.25, 49.0], [-69.47, 48.47], [-69.82, 48.32], [-69.85, 48.25], [-69.75, 48.0], [-69.97, 47.47], [-70.5, 47.25], [-71.03, 47.47], [-71.18, 47.82], [-71.25, 47.85], [-71.5, 47.75], [-72.03, 47.97], [-72.25, 48.5], [-72.03, 49.03], [-71.68, 49.18], [-71.65, 49.25], [-71.75, 49.5]]]]}, "2021-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.75, 49.5], [-71.53, 50.03], [-71.18, 50.18], [-71.03, 50.53], [-70.5, 50.75], [-70.25, 50.65], [-70.18, 50.68], [-70.15, 50.75], [-70.25, 51.0], [-70.03, 51.53], [-69.5, 51.75], [-69.25, 51.65], [-69.12, 51.7], [-69.25, 52.0], [-69.03, 52.53], [-68.5, 52.75], [-68.25, 52.65], [-68.0, 52.75], [-67.75, 52.65], [-67.5, 52.75], [-67.25, 52.65], [-67.18, 52.68], [-67.03, 53.03], [-66.5, 53.25], [-66.25, 53.15], [-66.0, 53.25], [-65.47, 53.03], [-65.25, 52.5], [-65.47, 51.97], [-65.82, 51.82], [-65.97, 51.47], [-66.5, 51.25], [-66.75, 51.35], [-66.82, 51.32], [-66.97, 50.97], [-67.32, 50.82], [-67.47, 50.47], [-68.0, 50.25], [-68.25, 50.35], [-68.5, 50.25], [-68.75, 50.35], [-68.82, 50.32], [-68.97, 49.97], [-69.32, 49.82], [-69.35, 49.75], [-69.25, 49.5], [-69.35, 49.25], [-69.25, 49.0], [-69.47, 48.47], [-69.82, 48.32], [-69.85, 48.25], [-69.75, 48.0], [-69.97, 47.47], [-70.5, 47.25], [-71.03, 47.47], [-71.18, 47.82], [-71.25, 47.85], [-71.5, 47.75], [-72.03, 47.97], [-72.25, 48.5], [-72.03, 49.03], [-71.68, 49.18], [-71.65, 49.25], [-71.75, 49.5]]]]}, "2021-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.75, 49.5], [-71.53, 50.03], [-71.18, 50.18], [-71.03, 50.53], [-70.5, 50.75], [-70.25, 50.65], [-70.18, 50.68], [-70.15, 50.75], [-70.25, 51.0], [-70.03, 51.53], [-69.5, 51.75], [-69.25, 51.65], [-69.12, 51.7], [-69.25, 52.0], [-69.03, 52.53], [-68.5, 52.75], [-68.25, 52.65], [-68.0, 52.75], [-67.75, 52.65], [-67.5, 52.75], [-67.25, 52.65], [-67.18, 52.68], [-67.03, 53.03], [-66.5, 53.25], [-66.25, 53.15], [-66.0, 53.25], [-65.47, 53.03], [-65.25, 52.5], [-65.47, 51.97], [-65.82, 51.82], [-65.97, 51.47], [-66.5, 51.25], [-66.75, 51.35], [-66.82, 51.32], [-66.97, 50.97], [-67.32, 50.82], [-67.47, 50.47], [-68.0, 50.25], [-68.25, 50.35], [-68.5, 50.25], [-68.75, 50.35], [-68.82, 50.32], [-68.97, 49.97], [-69.32, 49.82], [-69.35, 49.75], [-69.25, 49.5], [-69.35, 49.25], [-69.25, 49.0], [-69.47, 48.47], [-69.82, 48.32], [-69.85, 48.25], [-69.75, 48.0], [-69.97, 47.47], [-70.5, 47.25], [-71.03, 47.47], [-71.18, 47.82], [-71.25, 47.85], [-71.5, 47.75], [-72.03, 47.97], [-72.25, 48.5], [-72.03, 49.03], [-71.68, 49.18], [-71.65, 49.25], [-71.75, 49.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.51773435317682}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.1442057432794845}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.742198598007235, 11.12578669290906, 11.083765575412315]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.732033074975163, 9.152431356959084, 8.432524636470191]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.251111332710713, -4.004725865853288, -4.176780031274452]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.197122608287998, -5.51773435317682, -5.2116237568574775]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4796764747924522, -1.4108209332711787, -1.5062028034167083]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7899622017220447, -1.8372975438650085, -1.8732913579023056]}}