{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:28.732961", "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": "2018-Nov-02_to_2018-Nov-07_231.5_62.5"}, "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": 2018110000141}, "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": "November 02 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 07 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 51389.521473838104}, "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": 62.5}, "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": 231.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "231.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 227.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 232.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.03, 65.03], [-132.5, 65.25], [-132.25, 65.15], [-132.0, 65.25], [-131.75, 65.15], [-131.5, 65.25], [-130.97, 65.03], [-130.82, 64.68], [-130.75, 64.65], [-130.5, 64.75], [-130.25, 64.65], [-130.0, 64.75], [-129.75, 64.65], [-129.5, 64.75], [-129.25, 64.65], [-129.0, 64.75], [-128.47, 64.53], [-128.32, 64.18], [-128.25, 64.15], [-128.0, 64.25], [-127.47, 64.03], [-127.32, 63.68], [-126.97, 63.53], [-126.75, 63.0], [-126.85, 62.75], [-126.75, 62.5], [-126.97, 61.97], [-127.32, 61.82], [-127.47, 61.47], [-128.0, 61.25], [-128.25, 61.35], [-128.5, 61.25], [-128.75, 61.35], [-129.0, 61.25], [-129.53, 61.47], [-129.68, 61.82], [-130.03, 61.97], [-130.18, 62.32], [-130.25, 62.35], [-130.5, 62.25], [-130.75, 62.35], [-131.0, 62.25], [-131.53, 62.47], [-131.68, 62.82], [-131.75, 62.85], [-132.0, 62.75], [-132.53, 62.97], [-132.68, 63.32], [-133.03, 63.47], [-133.25, 64.0], [-133.15, 64.25], [-133.25, 64.5], [-133.03, 65.03]]]]}, "2018-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.03, 65.03], [-132.5, 65.25], [-132.25, 65.15], [-132.0, 65.25], [-131.75, 65.15], [-131.5, 65.25], [-130.97, 65.03], [-130.82, 64.68], [-130.75, 64.65], [-130.5, 64.75], [-130.25, 64.65], [-130.0, 64.75], [-129.75, 64.65], [-129.5, 64.75], [-129.25, 64.65], [-129.0, 64.75], [-128.47, 64.53], [-128.32, 64.18], [-128.25, 64.15], [-128.0, 64.25], [-127.47, 64.03], [-127.32, 63.68], [-126.97, 63.53], [-126.75, 63.0], [-126.85, 62.75], [-126.75, 62.5], [-126.97, 61.97], [-127.32, 61.82], [-127.47, 61.47], [-128.0, 61.25], [-128.25, 61.35], [-128.5, 61.25], [-128.75, 61.35], [-129.0, 61.25], [-129.53, 61.47], [-129.68, 61.82], [-129.75, 61.85], [-130.0, 61.75], [-130.53, 61.97], [-130.68, 62.32], [-130.75, 62.35], [-131.0, 62.25], [-131.53, 62.47], [-131.68, 62.82], [-131.75, 62.85], [-132.0, 62.75], [-132.53, 62.97], [-132.68, 63.32], [-133.03, 63.47], [-133.25, 64.0], [-133.15, 64.25], [-133.25, 64.5], [-133.03, 65.03]]]]}, "2018-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.03, 65.03], [-132.5, 65.25], [-132.25, 65.15], [-132.0, 65.25], [-131.75, 65.15], [-131.5, 65.25], [-130.97, 65.03], [-130.82, 64.68], [-130.75, 64.65], [-130.5, 64.75], [-130.25, 64.65], [-130.0, 64.75], [-129.75, 64.65], [-129.5, 64.75], [-129.25, 64.65], [-129.0, 64.75], [-128.47, 64.53], [-128.32, 64.18], [-128.25, 64.15], [-128.0, 64.25], [-127.47, 64.03], [-127.32, 63.68], [-126.97, 63.53], [-126.75, 63.0], [-126.85, 62.75], [-126.75, 62.5], [-126.97, 61.97], [-127.32, 61.82], [-127.47, 61.47], [-128.0, 61.25], [-128.25, 61.35], [-128.5, 61.25], [-128.75, 61.35], [-129.0, 61.25], [-129.53, 61.47], [-129.68, 61.82], [-129.75, 61.85], [-130.0, 61.75], [-130.53, 61.97], [-130.68, 62.32], [-130.75, 62.35], [-131.0, 62.25], [-131.53, 62.47], [-131.68, 62.82], [-131.75, 62.85], [-132.0, 62.75], [-132.53, 62.97], [-132.68, 63.32], [-133.03, 63.47], [-133.25, 64.0], [-133.15, 64.25], [-133.25, 64.5], [-133.03, 65.03]]]]}, "2018-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.03, 63.47], [-133.25, 64.0], [-133.03, 64.53], [-132.5, 64.75], [-132.25, 64.65], [-132.0, 64.75], [-131.75, 64.65], [-131.5, 64.75], [-131.25, 64.65], [-131.0, 64.75], [-130.47, 64.53], [-130.32, 64.18], [-130.25, 64.15], [-130.0, 64.25], [-129.75, 64.15], [-129.5, 64.25], [-129.25, 64.15], [-129.0, 64.25], [-128.75, 64.15], [-128.5, 64.25], [-128.25, 64.15], [-128.0, 64.25], [-127.47, 64.03], [-127.32, 63.68], [-126.97, 63.53], [-126.75, 63.0], [-126.85, 62.75], [-126.75, 62.5], [-126.97, 61.97], [-127.32, 61.82], [-127.47, 61.47], [-128.0, 61.25], [-128.25, 61.35], [-128.5, 61.25], [-128.75, 61.35], [-129.0, 61.25], [-129.53, 61.47], [-129.68, 61.82], [-129.75, 61.85], [-130.0, 61.75], [-130.53, 61.97], [-130.68, 62.32], [-131.03, 62.47], [-131.18, 62.82], [-131.25, 62.85], [-131.5, 62.75], [-132.03, 62.97], [-132.18, 63.32], [-132.25, 63.35], [-132.5, 63.25], [-133.03, 63.47]]]]}, "2018-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.53, 63.53], [-130.0, 63.75], [-129.75, 63.65], [-129.68, 63.68], [-129.53, 64.03], [-129.0, 64.25], [-128.47, 64.03], [-128.32, 63.68], [-128.25, 63.65], [-128.0, 63.75], [-127.75, 63.65], [-127.5, 63.75], [-126.97, 63.53], [-126.75, 63.0], [-126.85, 62.75], [-126.75, 62.5], [-126.97, 61.97], [-127.32, 61.82], [-127.47, 61.47], [-128.0, 61.25], [-128.25, 61.35], [-128.5, 61.25], [-128.75, 61.35], [-129.0, 61.25], [-129.53, 61.47], [-129.68, 61.82], [-129.75, 61.85], [-130.0, 61.75], [-130.53, 61.97], [-130.75, 62.5], [-130.65, 62.75], [-130.75, 63.0], [-130.53, 63.53]]]]}, "2018-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.53, 62.47], [-130.75, 63.0], [-130.53, 63.53], [-130.0, 63.75], [-129.75, 63.65], [-129.5, 63.75], [-129.25, 63.65], [-129.0, 63.75], [-128.75, 63.65], [-128.5, 63.75], [-127.97, 63.53], [-127.82, 63.18], [-127.47, 63.03], [-127.25, 62.5], [-127.47, 61.97], [-128.0, 61.75], [-128.25, 61.85], [-128.5, 61.75], [-128.75, 61.85], [-129.0, 61.75], [-129.53, 61.97], [-129.68, 62.32], [-129.75, 62.35], [-130.0, 62.25], [-130.53, 62.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.08337806961694}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.849047596259155}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-24.984428794920547, -27.812176726960814, -27.452339507526148, -27.791439489324773, -28.493321983718715, -27.742503590012944]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-27.908970494140476, -33.072204363228906, -34.29843161556664, -32.7555312405793, -32.70736455374586, -29.456374258547186]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.516487770111294, -12.966180330055845, -12.152706686603981, -11.934702498224226, -11.903626358869783, -10.724941709301277]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.3554546167002, -18.08337806961694, -17.953861762053947, -16.4793648802044, -16.060187051782776, -11.955671799479973]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.875971674771162, -2.2633909986683207, -2.0570467873004374, -1.9483698190996612, -1.8948805653175942, -1.588020476505367]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.14790513100092, -2.812111194213498, -2.8139103532774694, -2.467870789555416, -2.408959917390775, -1.689602005225104]}}