{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:49.243417", "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": "2023-Apr-08_to_2023-Apr-10_304.5_54.0"}, "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": 2023040000407}, "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": "April 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 10 2023"}, "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": 50162.97261582504}, "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.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": ["Labrador Sea"]}, "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": 54.0}, "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": 304.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.53, 57.03], [-60.0, 57.25], [-59.75, 57.15], [-59.5, 57.25], [-58.97, 57.03], [-58.82, 56.68], [-58.47, 56.53], [-58.32, 56.18], [-58.25, 56.15], [-58.0, 56.25], [-57.47, 56.03], [-57.32, 55.68], [-57.25, 55.65], [-57.0, 55.75], [-56.47, 55.53], [-56.32, 55.18], [-56.25, 55.15], [-56.0, 55.25], [-55.47, 55.03], [-55.32, 54.68], [-54.97, 54.53], [-54.82, 54.18], [-54.75, 54.15], [-54.5, 54.25], [-53.97, 54.03], [-53.82, 53.68], [-53.75, 53.65], [-53.5, 53.75], [-52.97, 53.53], [-52.75, 53.0], [-52.97, 52.47], [-53.5, 52.25], [-53.75, 52.35], [-54.0, 52.25], [-54.25, 52.35], [-54.5, 52.25], [-54.75, 52.35], [-55.0, 52.25], [-55.53, 52.47], [-55.68, 52.82], [-55.75, 52.85], [-56.0, 52.75], [-56.53, 52.97], [-56.68, 53.32], [-56.75, 53.35], [-57.0, 53.25], [-57.53, 53.47], [-57.68, 53.82], [-58.03, 53.97], [-58.18, 54.32], [-58.53, 54.47], [-58.68, 54.82], [-58.75, 54.85], [-59.0, 54.75], [-59.25, 54.85], [-59.5, 54.75], [-60.03, 54.97], [-60.18, 55.32], [-60.53, 55.47], [-60.75, 56.0], [-60.65, 56.25], [-60.75, 56.5], [-60.53, 57.03]]]]}, "2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.53, 57.03], [-60.0, 57.25], [-59.75, 57.15], [-59.5, 57.25], [-58.97, 57.03], [-58.82, 56.68], [-58.47, 56.53], [-58.32, 56.18], [-58.25, 56.15], [-58.0, 56.25], [-57.47, 56.03], [-57.32, 55.68], [-57.25, 55.65], [-57.0, 55.75], [-56.47, 55.53], [-56.32, 55.18], [-56.25, 55.15], [-56.0, 55.25], [-55.47, 55.03], [-55.32, 54.68], [-54.97, 54.53], [-54.82, 54.18], [-54.75, 54.15], [-54.5, 54.25], [-53.97, 54.03], [-53.82, 53.68], [-53.75, 53.65], [-53.5, 53.75], [-52.97, 53.53], [-52.75, 53.0], [-52.97, 52.47], [-53.5, 52.25], [-53.75, 52.35], [-54.0, 52.25], [-54.25, 52.35], [-54.5, 52.25], [-54.75, 52.35], [-55.0, 52.25], [-55.53, 52.47], [-55.68, 52.82], [-55.75, 52.85], [-56.0, 52.75], [-56.53, 52.97], [-56.68, 53.32], [-56.75, 53.35], [-57.0, 53.25], [-57.53, 53.47], [-57.68, 53.82], [-58.03, 53.97], [-58.18, 54.32], [-58.53, 54.47], [-58.68, 54.82], [-58.75, 54.85], [-59.0, 54.75], [-59.25, 54.85], [-59.5, 54.75], [-60.03, 54.97], [-60.18, 55.32], [-60.53, 55.47], [-60.75, 56.0], [-60.65, 56.25], [-60.75, 56.5], [-60.53, 57.03]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.53, 57.03], [-60.0, 57.25], [-59.75, 57.15], [-59.5, 57.25], [-58.97, 57.03], [-58.82, 56.68], [-58.47, 56.53], [-58.32, 56.18], [-58.25, 56.15], [-58.0, 56.25], [-57.47, 56.03], [-57.32, 55.68], [-57.25, 55.65], [-57.0, 55.75], [-56.47, 55.53], [-56.32, 55.18], [-56.25, 55.15], [-56.0, 55.25], [-55.47, 55.03], [-55.32, 54.68], [-54.97, 54.53], [-54.82, 54.18], [-54.75, 54.15], [-54.5, 54.25], [-53.97, 54.03], [-53.82, 53.68], [-53.75, 53.65], [-53.5, 53.75], [-52.97, 53.53], [-52.75, 53.0], [-52.97, 52.47], [-53.5, 52.25], [-53.75, 52.35], [-54.0, 52.25], [-54.25, 52.35], [-54.5, 52.25], [-54.75, 52.35], [-55.0, 52.25], [-55.53, 52.47], [-55.68, 52.82], [-55.75, 52.85], [-56.0, 52.75], [-56.53, 52.97], [-56.68, 53.32], [-56.75, 53.35], [-57.0, 53.25], [-57.53, 53.47], [-57.68, 53.82], [-58.03, 53.97], [-58.18, 54.32], [-58.53, 54.47], [-58.68, 54.82], [-58.75, 54.85], [-59.0, 54.75], [-59.25, 54.85], [-59.5, 54.75], [-60.03, 54.97], [-60.18, 55.32], [-60.53, 55.47], [-60.75, 56.0], [-60.65, 56.25], [-60.75, 56.5], [-60.53, 57.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.783770068950332}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.711629239075235}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.768892296309446, -12.10428510782782, -10.565861459813277]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.498744539594327, -14.621063791666018, -14.543125722338857]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.56244499142641, -8.017811465410018, -6.554631260389273]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.1912464579335165, -8.783770068950332, -8.203393053346417]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5457030169071213, -2.2772453061039477, -1.8668573309813414]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7231706375050244, -2.59485318115983, -2.3519392545588165]}}