{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:53.174184", "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": "2019-Jun-20_to_2019-Jun-22_251.5_49.0"}, "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": 2019060000643}, "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 20 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 22 2019"}, "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": 62208.22385734822}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.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": 49.0}, "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": 251.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "251.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 249.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.0, 49.75], [-109.75, 49.65], [-109.68, 49.68], [-109.65, 49.75], [-109.75, 50.0], [-109.65, 50.25], [-109.75, 50.5], [-109.53, 51.03], [-109.0, 51.25], [-108.75, 51.15], [-108.5, 51.25], [-108.25, 51.15], [-108.0, 51.25], [-107.75, 51.15], [-107.5, 51.25], [-106.97, 51.03], [-106.82, 50.68], [-106.75, 50.65], [-106.5, 50.75], [-106.25, 50.65], [-106.0, 50.75], [-105.75, 50.65], [-105.5, 50.75], [-104.97, 50.53], [-104.75, 50.0], [-104.85, 49.75], [-104.75, 49.5], [-104.97, 48.97], [-105.32, 48.82], [-105.47, 48.47], [-106.0, 48.25], [-106.25, 48.35], [-106.5, 48.25], [-106.75, 48.35], [-107.0, 48.25], [-107.53, 48.47], [-107.68, 48.82], [-107.75, 48.85], [-107.82, 48.82], [-107.97, 48.47], [-108.32, 48.32], [-108.47, 47.97], [-109.0, 47.75], [-109.25, 47.85], [-109.5, 47.75], [-109.75, 47.85], [-110.0, 47.75], [-110.25, 47.85], [-110.5, 47.75], [-111.03, 47.97], [-111.25, 48.5], [-111.03, 49.03], [-110.68, 49.18], [-110.53, 49.53], [-110.0, 49.75]]]]}, "2019-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.0, 49.75], [-109.75, 49.65], [-109.68, 49.68], [-109.65, 49.75], [-109.75, 50.0], [-109.65, 50.25], [-109.75, 50.5], [-109.53, 51.03], [-109.0, 51.25], [-108.75, 51.15], [-108.5, 51.25], [-108.25, 51.15], [-108.0, 51.25], [-107.75, 51.15], [-107.5, 51.25], [-106.97, 51.03], [-106.82, 50.68], [-106.75, 50.65], [-106.5, 50.75], [-106.25, 50.65], [-106.0, 50.75], [-105.75, 50.65], [-105.5, 50.75], [-104.97, 50.53], [-104.75, 50.0], [-104.85, 49.75], [-104.75, 49.5], [-104.97, 48.97], [-105.32, 48.82], [-105.47, 48.47], [-106.0, 48.25], [-106.25, 48.35], [-106.5, 48.25], [-106.75, 48.35], [-107.0, 48.25], [-107.53, 48.47], [-107.68, 48.82], [-107.75, 48.85], [-107.82, 48.82], [-107.97, 48.47], [-108.32, 48.32], [-108.47, 47.97], [-109.0, 47.75], [-109.25, 47.85], [-109.5, 47.75], [-109.75, 47.85], [-110.0, 47.75], [-110.25, 47.85], [-110.5, 47.75], [-111.03, 47.97], [-111.25, 48.5], [-111.03, 49.03], [-110.68, 49.18], [-110.53, 49.53], [-110.0, 49.75]]]]}, "2019-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.0, 49.75], [-109.75, 49.65], [-109.68, 49.68], [-109.65, 49.75], [-109.75, 50.0], [-109.65, 50.25], [-109.75, 50.5], [-109.53, 51.03], [-109.0, 51.25], [-108.75, 51.15], [-108.5, 51.25], [-108.25, 51.15], [-108.0, 51.25], [-107.75, 51.15], [-107.5, 51.25], [-106.97, 51.03], [-106.82, 50.68], [-106.75, 50.65], [-106.5, 50.75], [-106.25, 50.65], [-106.0, 50.75], [-105.75, 50.65], [-105.5, 50.75], [-104.97, 50.53], [-104.75, 50.0], [-104.85, 49.75], [-104.75, 49.5], [-104.97, 48.97], [-105.32, 48.82], [-105.47, 48.47], [-106.0, 48.25], [-106.25, 48.35], [-106.5, 48.25], [-106.75, 48.35], [-107.0, 48.25], [-107.53, 48.47], [-107.68, 48.82], [-107.75, 48.85], [-107.82, 48.82], [-107.97, 48.47], [-108.32, 48.32], [-108.47, 47.97], [-109.0, 47.75], [-109.25, 47.85], [-109.5, 47.75], [-109.75, 47.85], [-110.0, 47.75], [-110.25, 47.85], [-110.5, 47.75], [-111.03, 47.97], [-111.25, 48.5], [-111.03, 49.03], [-110.68, 49.18], [-110.53, 49.53], [-110.0, 49.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.01027496211708}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.046521272713235}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.340281024455408, 10.438614652141439, 11.390645650457031]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.517100850752115, 7.487016117797452, 10.35841593009286]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.625553642155577, -5.6524126819396345, -4.861597494044495]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.625983180579169, -7.01027496211708, -5.725049782296253]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4715747003909032, -1.8013286314653532, -1.5565129604552723]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7909711487975322, -2.2483512619140718, -1.8177024504263728]}}