{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:31:17.801512", "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": "2022-Jun-12_to_2022-Jun-14_227.5_60.5"}, "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": 2022060000527}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 14 2022"}, "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": 73923.79286614468}, "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": ["N.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": 60.5}, "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": 227.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "227.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 225.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 231.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.68, 61.18], [-133.53, 61.53], [-133.0, 61.75], [-132.75, 61.65], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.47, 59.47], [-128.82, 59.32], [-128.85, 59.25], [-128.75, 59.0], [-128.97, 58.47], [-129.5, 58.25], [-129.75, 58.35], [-130.0, 58.25], [-130.25, 58.35], [-130.5, 58.25], [-130.75, 58.35], [-131.0, 58.25], [-131.25, 58.35], [-131.5, 58.25], [-131.75, 58.35], [-132.0, 58.25], [-132.53, 58.47], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97], [-135.25, 60.5]]]]}, "2022-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.68, 61.18], [-133.53, 61.53], [-133.0, 61.75], [-132.75, 61.65], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.47, 59.47], [-128.82, 59.32], [-128.85, 59.25], [-128.75, 59.0], [-128.97, 58.47], [-129.5, 58.25], [-129.75, 58.35], [-130.0, 58.25], [-130.25, 58.35], [-130.5, 58.25], [-130.75, 58.35], [-131.0, 58.25], [-131.25, 58.35], [-131.5, 58.25], [-131.75, 58.35], [-132.0, 58.25], [-132.53, 58.47], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97], [-135.25, 60.5]]]]}, "2022-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.68, 61.18], [-133.53, 61.53], [-133.0, 61.75], [-132.75, 61.65], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.47, 59.47], [-128.82, 59.32], [-128.85, 59.25], [-128.75, 59.0], [-128.97, 58.47], [-129.5, 58.25], [-129.75, 58.35], [-130.0, 58.25], [-130.25, 58.35], [-130.5, 58.25], [-130.75, 58.35], [-131.0, 58.25], [-131.25, 58.35], [-131.5, 58.25], [-131.75, 58.35], [-132.0, 58.25], [-132.53, 58.47], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97], [-135.25, 60.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.922326037227663}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.244282468036584}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.959348393087396, 4.079396258800784, 6.060370236161987]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.4264031107451274, 1.4122582353458597, 3.937673237782519]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.131458749123316, -6.1969459248414225, -4.404442730145018]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.72394271121766, -8.922326037227663, -6.0898619244158]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8371534709087844, -2.1739309032111427, -1.5201040366463372]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.429934580368166, -3.1313751439823996, -2.089611781354309]}}