{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:37.025312", "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": "2020-Jul-01_to_2020-Jul-04_239.0_50.5"}, "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": 2020070000076}, "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 01 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 72318.18328492958}, "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": ["The Coastal Waters of Southeast Alaska and British Columbia"]}, "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": 50.5}, "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": 239.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "239.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 236.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 240.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.75, 49.5], [-123.53, 50.03], [-123.18, 50.18], [-123.03, 50.53], [-122.5, 50.75], [-122.25, 50.65], [-122.18, 50.68], [-122.15, 50.75], [-122.25, 51.0], [-122.03, 51.53], [-121.5, 51.75], [-121.25, 51.65], [-121.0, 51.75], [-120.75, 51.65], [-120.5, 51.75], [-120.25, 51.65], [-120.0, 51.75], [-119.47, 51.53], [-119.32, 51.18], [-118.97, 51.03], [-118.75, 50.5], [-118.85, 50.25], [-118.75, 50.0], [-118.97, 49.47], [-119.5, 49.25], [-119.75, 49.35], [-119.82, 49.32], [-119.85, 49.25], [-119.75, 49.0], [-119.85, 48.75], [-119.75, 48.5], [-119.97, 47.97], [-120.5, 47.75], [-120.75, 47.85], [-120.82, 47.82], [-120.97, 47.47], [-121.32, 47.32], [-121.47, 46.97], [-121.82, 46.82], [-121.85, 46.75], [-121.75, 46.5], [-121.97, 45.97], [-122.5, 45.75], [-123.03, 45.97], [-123.25, 46.5], [-123.15, 46.75], [-123.25, 47.0], [-123.03, 47.53], [-122.68, 47.68], [-122.54, 48.0], [-122.68, 48.32], [-123.03, 48.47], [-123.18, 48.82], [-123.53, 48.97], [-123.75, 49.5]]]]}, "2020-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 50.03], [-123.18, 50.18], [-123.03, 50.53], [-122.5, 50.75], [-122.25, 50.65], [-122.18, 50.68], [-122.15, 50.75], [-122.25, 51.0], [-122.03, 51.53], [-121.5, 51.75], [-121.25, 51.65], [-121.0, 51.75], [-120.75, 51.65], [-120.5, 51.75], [-120.25, 51.65], [-120.0, 51.75], [-119.47, 51.53], [-119.32, 51.18], [-118.97, 51.03], [-118.75, 50.5], [-118.85, 50.25], [-118.75, 50.0], [-118.97, 49.47], [-119.5, 49.25], [-119.75, 49.35], [-119.82, 49.32], [-119.85, 49.25], [-119.75, 49.0], [-119.85, 48.75], [-119.75, 48.5], [-119.97, 47.97], [-120.5, 47.75], [-120.75, 47.85], [-120.82, 47.82], [-120.97, 47.47], [-121.32, 47.32], [-121.47, 46.97], [-121.82, 46.82], [-121.85, 46.75], [-121.75, 46.5], [-121.97, 45.97], [-122.5, 45.75], [-123.03, 45.97], [-123.25, 46.5], [-123.15, 46.75], [-123.25, 47.0], [-123.03, 47.53], [-122.68, 47.68], [-122.54, 48.0], [-122.68, 48.32], [-122.75, 48.35], [-123.0, 48.25], [-123.53, 48.47], [-123.75, 49.0], [-123.65, 49.25], [-123.75, 49.5], [-123.53, 50.03]]]]}, "2020-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 50.03], [-123.18, 50.18], [-123.03, 50.53], [-122.5, 50.75], [-122.25, 50.65], [-122.18, 50.68], [-122.15, 50.75], [-122.25, 51.0], [-122.03, 51.53], [-121.5, 51.75], [-121.25, 51.65], [-121.0, 51.75], [-120.75, 51.65], [-120.5, 51.75], [-120.25, 51.65], [-120.0, 51.75], [-119.47, 51.53], [-119.32, 51.18], [-118.97, 51.03], [-118.75, 50.5], [-118.85, 50.25], [-118.75, 50.0], [-118.97, 49.47], [-119.5, 49.25], [-119.75, 49.35], [-119.82, 49.32], [-119.85, 49.25], [-119.75, 49.0], [-119.85, 48.75], [-119.75, 48.5], [-119.97, 47.97], [-120.5, 47.75], [-120.75, 47.85], [-120.82, 47.82], [-120.97, 47.47], [-121.32, 47.32], [-121.47, 46.97], [-121.82, 46.82], [-121.85, 46.75], [-121.75, 46.5], [-121.97, 45.97], [-122.5, 45.75], [-123.03, 45.97], [-123.25, 46.5], [-123.15, 46.75], [-123.25, 47.0], [-123.03, 47.53], [-122.68, 47.68], [-122.54, 48.0], [-122.68, 48.32], [-122.75, 48.35], [-123.0, 48.25], [-123.53, 48.47], [-123.75, 49.0], [-123.65, 49.25], [-123.75, 49.5], [-123.53, 50.03]]]]}, "2020-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 50.03], [-123.18, 50.18], [-123.03, 50.53], [-122.5, 50.75], [-122.25, 50.65], [-122.18, 50.68], [-122.15, 50.75], [-122.25, 51.0], [-122.03, 51.53], [-121.5, 51.75], [-121.25, 51.65], [-121.0, 51.75], [-120.75, 51.65], [-120.5, 51.75], [-120.25, 51.65], [-120.0, 51.75], [-119.47, 51.53], [-119.32, 51.18], [-118.97, 51.03], [-118.75, 50.5], [-118.85, 50.25], [-118.75, 50.0], [-118.97, 49.47], [-119.5, 49.25], [-119.75, 49.35], [-120.0, 49.25], [-120.25, 49.35], [-120.32, 49.32], [-120.35, 49.25], [-120.25, 49.0], [-120.47, 48.47], [-121.0, 48.25], [-121.25, 48.35], [-121.5, 48.25], [-121.75, 48.35], [-122.0, 48.25], [-122.25, 48.35], [-122.5, 48.25], [-122.75, 48.35], [-123.0, 48.25], [-123.53, 48.47], [-123.75, 49.0], [-123.65, 49.25], [-123.75, 49.5], [-123.53, 50.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.938396761638273}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.921579349565331}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.461669315149322, 9.256904230729049, 9.104548438820416, 9.544912013885494]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.2149874525811697, 4.669106546750584, 4.955251374016996, 6.517477132560998]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.272714378575223, -4.723636739031308, -4.962351433607727, -4.666518308732719]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.597043658152302, -5.5366389300422725, -6.938396761638273, -5.351306828549696]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5524734716806765, -1.4202528252107602, -1.508938758921902, -1.4185507751939466]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.800069563189791, -1.5681297374772705, -1.9767760590748986, -1.5452477825026114]}}