{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:58.179843", "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-Jan-30_to_2022-Feb-05_84.5_-74.5"}, "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": 2022010001094}, "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": "January 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 05 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 141382.44895480518}, "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": ["Antarctica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": -74.5}, "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": 84.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "84.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 89.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -77.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -72.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[83.97, -75.03], [83.75, -74.5], [83.97, -73.97], [84.5, -73.75], [84.75, -73.85], [85.0, -73.75], [85.53, -73.97], [85.75, -74.5], [85.53, -75.03], [85.0, -75.25], [84.75, -75.15], [84.5, -75.25], [83.97, -75.03]]]]}, "2022-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, -75.5], [73.47, -74.97], [74.0, -74.75], [74.25, -74.85], [74.5, -74.75], [74.75, -74.85], [74.82, -74.82], [74.97, -74.47], [75.5, -74.25], [75.75, -74.35], [76.0, -74.25], [76.25, -74.35], [76.5, -74.25], [76.75, -74.35], [77.0, -74.25], [77.25, -74.35], [77.5, -74.25], [77.75, -74.35], [78.0, -74.25], [78.25, -74.35], [78.5, -74.25], [78.75, -74.35], [79.0, -74.25], [79.25, -74.35], [79.5, -74.25], [79.75, -74.35], [79.82, -74.32], [79.97, -73.97], [80.5, -73.75], [80.75, -73.85], [81.0, -73.75], [81.25, -73.85], [81.5, -73.75], [81.75, -73.85], [82.0, -73.75], [82.25, -73.85], [82.5, -73.75], [82.75, -73.85], [83.0, -73.75], [83.25, -73.85], [83.5, -73.75], [83.75, -73.85], [84.0, -73.75], [84.25, -73.85], [84.5, -73.75], [84.75, -73.85], [85.0, -73.75], [85.25, -73.85], [85.5, -73.75], [86.03, -73.97], [86.25, -74.5], [86.03, -75.03], [85.5, -75.25], [85.25, -75.15], [85.18, -75.18], [85.03, -75.53], [84.5, -75.75], [84.25, -75.65], [84.18, -75.68], [84.03, -76.03], [83.5, -76.25], [83.25, -76.15], [83.0, -76.25], [82.75, -76.15], [82.5, -76.25], [82.25, -76.15], [82.0, -76.25], [81.75, -76.15], [81.68, -76.18], [81.53, -76.53], [81.0, -76.75], [80.75, -76.65], [80.5, -76.75], [80.25, -76.65], [80.0, -76.75], [79.75, -76.65], [79.5, -76.75], [79.25, -76.65], [79.0, -76.75], [78.75, -76.65], [78.5, -76.75], [78.25, -76.65], [78.0, -76.75], [77.75, -76.65], [77.5, -76.75], [77.25, -76.65], [77.0, -76.75], [76.75, -76.65], [76.5, -76.75], [76.25, -76.65], [76.0, -76.75], [75.75, -76.65], [75.5, -76.75], [74.97, -76.53], [74.82, -76.18], [74.75, -76.15], [74.5, -76.25], [74.25, -76.15], [74.0, -76.25], [73.47, -76.03], [73.25, -75.5]]], [[[86.97, -74.53], [86.75, -74.0], [86.97, -73.47], [87.5, -73.25], [88.03, -73.47], [88.25, -74.0], [88.03, -74.53], [87.5, -74.75], [86.97, -74.53]]]]}, "2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.25, -75.5], [73.47, -74.97], [74.0, -74.75], [74.25, -74.85], [74.5, -74.75], [74.75, -74.85], [74.82, -74.82], [74.97, -74.47], [75.5, -74.25], [75.75, -74.35], [76.0, -74.25], [76.25, -74.35], [76.5, -74.25], [76.75, -74.35], [77.0, -74.25], [77.25, -74.35], [77.5, -74.25], [77.75, -74.35], [78.0, -74.25], [78.25, -74.35], [78.5, -74.25], [78.75, -74.35], [79.0, -74.25], [79.25, -74.35], [79.5, -74.25], [79.75, -74.35], [79.82, -74.32], [79.97, -73.97], [80.5, -73.75], [80.75, -73.85], [81.0, -73.75], [81.25, -73.85], [81.5, -73.75], [81.75, -73.85], [82.0, -73.75], [82.25, -73.85], [82.5, -73.75], [82.75, -73.85], [83.0, -73.75], [83.25, -73.85], [83.5, -73.75], [83.75, -73.85], [84.0, -73.75], [84.25, -73.85], [84.5, -73.75], [84.75, -73.85], [85.0, -73.75], [85.25, -73.85], [85.5, -73.75], [86.03, -73.97], [86.25, -74.5], [86.03, -75.03], [85.5, -75.25], [85.25, -75.15], [85.18, -75.18], [85.03, -75.53], [84.5, -75.75], [84.25, -75.65], [84.18, -75.68], [84.03, -76.03], [83.5, -76.25], [83.25, -76.15], [83.0, -76.25], [82.75, -76.15], [82.5, -76.25], [82.25, -76.15], [82.0, -76.25], [81.75, -76.15], [81.68, -76.18], [81.53, -76.53], [81.0, -76.75], [80.75, -76.65], [80.5, -76.75], [80.25, -76.65], [80.0, -76.75], [79.75, -76.65], [79.5, -76.75], [79.25, -76.65], [79.0, -76.75], [78.75, -76.65], [78.5, -76.75], [78.25, -76.65], [78.0, -76.75], [77.75, -76.65], [77.5, -76.75], [77.25, -76.65], [77.0, -76.75], [76.75, -76.65], [76.5, -76.75], [76.25, -76.65], [76.0, -76.75], [75.75, -76.65], [75.5, -76.75], [74.97, -76.53], [74.82, -76.18], [74.75, -76.15], [74.5, -76.25], [74.25, -76.15], [74.0, -76.25], [73.47, -76.03], [73.25, -75.5]]], [[[86.97, -74.53], [86.75, -74.0], [86.97, -73.47], [87.5, -73.25], [88.03, -73.47], [88.25, -74.0], [88.03, -74.53], [87.5, -74.75], [86.97, -74.53]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, -74.97], [74.0, -74.75], [74.25, -74.85], [74.5, -74.75], [74.75, -74.85], [74.82, -74.82], [74.97, -74.47], [75.5, -74.25], [75.75, -74.35], [76.0, -74.25], [76.25, -74.35], [76.5, -74.25], [76.75, -74.35], [77.0, -74.25], [77.25, -74.35], [77.5, -74.25], [77.75, -74.35], [78.0, -74.25], [78.25, -74.35], [78.5, -74.25], [78.75, -74.35], [79.0, -74.25], [79.25, -74.35], [79.5, -74.25], [79.75, -74.35], [79.82, -74.32], [79.97, -73.97], [80.5, -73.75], [80.75, -73.85], [81.0, -73.75], [81.25, -73.85], [81.5, -73.75], [81.75, -73.85], [82.0, -73.75], [82.25, -73.85], [82.5, -73.75], [82.75, -73.85], [83.0, -73.75], [83.25, -73.85], [83.5, -73.75], [83.75, -73.85], [84.0, -73.75], [84.25, -73.85], [84.5, -73.75], [84.75, -73.85], [85.0, -73.75], [85.25, -73.85], [85.5, -73.75], [85.75, -73.85], [86.0, -73.75], [86.25, -73.85], [86.5, -73.75], [86.75, -73.85], [86.82, -73.82], [86.97, -73.47], [87.5, -73.25], [87.75, -73.35], [88.0, -73.25], [88.25, -73.35], [88.5, -73.25], [88.75, -73.35], [89.0, -73.25], [89.53, -73.47], [89.75, -74.0], [89.53, -74.53], [89.0, -74.75], [88.75, -74.65], [88.5, -74.75], [88.25, -74.65], [88.18, -74.68], [88.03, -75.03], [87.68, -75.18], [87.65, -75.25], [87.75, -75.5], [87.53, -76.03], [87.0, -76.25], [86.75, -76.15], [86.68, -76.18], [86.53, -76.53], [86.0, -76.75], [85.75, -76.65], [85.5, -76.75], [85.25, -76.65], [85.0, -76.75], [84.75, -76.65], [84.68, -76.68], [84.53, -77.03], [84.0, -77.25], [83.75, -77.15], [83.5, -77.25], [83.25, -77.15], [83.0, -77.25], [82.75, -77.15], [82.5, -77.25], [82.25, -77.15], [82.0, -77.25], [81.75, -77.15], [81.68, -77.18], [81.53, -77.53], [81.0, -77.75], [80.75, -77.65], [80.5, -77.75], [80.25, -77.65], [80.0, -77.75], [79.75, -77.65], [79.5, -77.75], [78.97, -77.53], [78.82, -77.18], [78.75, -77.15], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.47, -77.03], [75.32, -76.68], [75.25, -76.65], [75.0, -76.75], [74.75, -76.65], [74.5, -76.75], [74.25, -76.65], [74.0, -76.75], [73.47, -76.53], [73.25, -76.0], [73.35, -75.75], [73.25, -75.5], [73.47, -74.97]]]]}, "2022-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, -76.53], [73.25, -76.0], [73.47, -75.47], [74.0, -75.25], [74.25, -75.35], [74.32, -75.32], [74.47, -74.97], [75.0, -74.75], [75.25, -74.85], [75.32, -74.82], [75.47, -74.47], [76.0, -74.25], [76.25, -74.35], [76.5, -74.25], [76.75, -74.35], [77.0, -74.25], [77.25, -74.35], [77.5, -74.25], [77.75, -74.35], [77.82, -74.32], [77.97, -73.97], [78.5, -73.75], [78.75, -73.85], [78.82, -73.82], [78.97, -73.47], [79.32, -73.32], [79.47, -72.97], [80.0, -72.75], [80.25, -72.85], [80.5, -72.75], [80.75, -72.85], [80.82, -72.82], [80.97, -72.47], [81.5, -72.25], [81.75, -72.35], [82.0, -72.25], [82.25, -72.35], [82.5, -72.25], [82.75, -72.35], [83.0, -72.25], [83.25, -72.35], [83.32, -72.32], [83.47, -71.97], [84.0, -71.75], [84.25, -71.85], [84.5, -71.75], [84.75, -71.85], [85.0, -71.75], [85.5, -71.96], [86.0, -71.75], [86.25, -71.85], [86.5, -71.75], [87.03, -71.97], [87.18, -72.32], [87.25, -72.35], [87.5, -72.25], [87.75, -72.35], [88.0, -72.25], [88.53, -72.47], [88.68, -72.82], [88.75, -72.85], [89.0, -72.75], [89.53, -72.97], [89.75, -73.5], [89.65, -73.75], [89.75, -74.0], [89.53, -74.53], [89.0, -74.75], [88.75, -74.65], [88.68, -74.68], [88.53, -75.03], [88.0, -75.25], [87.75, -75.15], [87.68, -75.18], [87.65, -75.25], [87.75, -75.5], [87.53, -76.03], [87.0, -76.25], [86.75, -76.15], [86.68, -76.18], [86.53, -76.53], [86.0, -76.75], [85.75, -76.65], [85.5, -76.75], [85.25, -76.65], [85.0, -76.75], [84.75, -76.65], [84.68, -76.68], [84.53, -77.03], [84.0, -77.25], [83.75, -77.15], [83.5, -77.25], [83.25, -77.15], [83.0, -77.25], [82.75, -77.15], [82.5, -77.25], [82.25, -77.15], [82.0, -77.25], [81.75, -77.15], [81.68, -77.18], [81.53, -77.53], [81.0, -77.75], [80.75, -77.65], [80.5, -77.75], [80.25, -77.65], [80.0, -77.75], [79.75, -77.65], [79.5, -77.75], [78.97, -77.53], [78.82, -77.18], [78.75, -77.15], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.47, -77.03], [75.32, -76.68], [75.25, -76.65], [75.0, -76.75], [74.75, -76.65], [74.5, -76.75], [74.25, -76.65], [74.0, -76.75], [73.47, -76.53]]]]}, "2022-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, -76.53], [73.25, -76.0], [73.47, -75.47], [74.0, -75.25], [74.25, -75.35], [74.5, -75.25], [74.75, -75.35], [75.0, -75.25], [75.25, -75.35], [75.32, -75.32], [75.47, -74.97], [76.0, -74.75], [76.25, -74.85], [76.5, -74.75], [76.75, -74.85], [76.82, -74.82], [76.97, -74.47], [77.5, -74.25], [77.75, -74.35], [77.82, -74.32], [77.97, -73.97], [78.5, -73.75], [78.75, -73.85], [78.82, -73.82], [78.97, -73.47], [79.32, -73.32], [79.47, -72.97], [80.0, -72.75], [80.25, -72.85], [80.5, -72.75], [80.75, -72.85], [80.82, -72.82], [80.97, -72.47], [81.5, -72.25], [81.75, -72.35], [82.0, -72.25], [82.25, -72.35], [82.5, -72.25], [82.75, -72.35], [83.0, -72.25], [83.25, -72.35], [83.32, -72.32], [83.47, -71.97], [84.0, -71.75], [84.25, -71.85], [84.5, -71.75], [84.75, -71.85], [85.0, -71.75], [85.5, -71.96], [86.0, -71.75], [86.25, -71.85], [86.5, -71.75], [87.03, -71.97], [87.18, -72.32], [87.25, -72.35], [87.5, -72.25], [87.75, -72.35], [88.0, -72.25], [88.53, -72.47], [88.68, -72.82], [88.75, -72.85], [89.0, -72.75], [89.53, -72.97], [89.75, -73.5], [89.65, -73.75], [89.75, -74.0], [89.53, -74.53], [89.0, -74.75], [88.75, -74.65], [88.68, -74.68], [88.53, -75.03], [88.0, -75.25], [87.75, -75.15], [87.68, -75.18], [87.65, -75.25], [87.75, -75.5], [87.53, -76.03], [87.0, -76.25], [86.75, -76.15], [86.68, -76.18], [86.53, -76.53], [86.0, -76.75], [85.75, -76.65], [85.5, -76.75], [85.25, -76.65], [85.0, -76.75], [84.75, -76.65], [84.68, -76.68], [84.53, -77.03], [84.0, -77.25], [83.75, -77.15], [83.5, -77.25], [83.25, -77.15], [83.0, -77.25], [82.75, -77.15], [82.5, -77.25], [82.25, -77.15], [82.0, -77.25], [81.75, -77.15], [81.68, -77.18], [81.53, -77.53], [81.0, -77.75], [80.75, -77.65], [80.5, -77.75], [80.25, -77.65], [80.0, -77.75], [79.75, -77.65], [79.5, -77.75], [78.97, -77.53], [78.82, -77.18], [78.75, -77.15], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.47, -77.03], [75.32, -76.68], [75.25, -76.65], [75.0, -76.75], [74.75, -76.65], [74.5, -76.75], [74.25, -76.65], [74.0, -76.75], [73.47, -76.53]]]]}, "2022-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.47, -74.97], [76.0, -74.75], [76.25, -74.85], [76.5, -74.75], [76.75, -74.85], [76.82, -74.82], [76.97, -74.47], [77.5, -74.25], [77.75, -74.35], [77.82, -74.32], [77.97, -73.97], [78.5, -73.75], [78.75, -73.85], [78.82, -73.82], [78.97, -73.47], [79.32, -73.32], [79.47, -72.97], [80.0, -72.75], [80.25, -72.85], [80.5, -72.75], [80.75, -72.85], [80.82, -72.82], [80.97, -72.47], [81.5, -72.25], [81.75, -72.35], [82.0, -72.25], [82.25, -72.35], [82.5, -72.25], [82.75, -72.35], [83.0, -72.25], [83.25, -72.35], [83.32, -72.32], [83.47, -71.97], [84.0, -71.75], [84.25, -71.85], [84.5, -71.75], [84.75, -71.85], [85.0, -71.75], [85.5, -71.96], [86.0, -71.75], [86.25, -71.85], [86.5, -71.75], [87.03, -71.97], [87.18, -72.32], [87.25, -72.35], [87.5, -72.25], [87.75, -72.35], [88.0, -72.25], [88.53, -72.47], [88.68, -72.82], [88.75, -72.85], [89.0, -72.75], [89.53, -72.97], [89.75, -73.5], [89.53, -74.03], [89.18, -74.18], [89.03, -74.53], [88.68, -74.68], [88.53, -75.03], [88.0, -75.25], [87.75, -75.15], [87.68, -75.18], [87.53, -75.53], [87.0, -75.75], [86.75, -75.65], [86.5, -75.75], [86.25, -75.65], [86.0, -75.75], [85.75, -75.65], [85.68, -75.68], [85.53, -76.03], [85.0, -76.25], [84.5, -76.04], [84.0, -76.25], [83.75, -76.15], [83.5, -76.25], [83.25, -76.15], [83.0, -76.25], [82.75, -76.15], [82.68, -76.18], [82.53, -76.53], [82.0, -76.75], [81.75, -76.65], [81.5, -76.75], [81.25, -76.65], [81.0, -76.75], [80.75, -76.65], [80.5, -76.75], [80.25, -76.65], [80.0, -76.75], [79.75, -76.65], [79.5, -76.75], [78.97, -76.53], [78.82, -76.18], [78.75, -76.15], [78.5, -76.25], [78.25, -76.15], [78.0, -76.25], [77.75, -76.15], [77.68, -76.18], [77.53, -76.53], [77.0, -76.75], [76.75, -76.65], [76.5, -76.75], [76.25, -76.65], [76.0, -76.75], [75.47, -76.53], [75.25, -76.0], [75.35, -75.75], [75.25, -75.5], [75.47, -74.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.656042344397974}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.960534604131244}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-35.46482942752206, -33.84815167966096, -33.334686249305946, -34.65058475422359, -35.2817267096292, -36.18340345566244, -35.381121432839024]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-35.681156390345535, -37.75735314552534, -36.88707220911968, -38.45301517643952, -39.760424569890375, -40.86210780471242, -38.77464247348041]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.28351252966408, -5.226163482731071, -4.569830175574743, -4.546320909009565, -4.9542948522696175, -5.508484289342899, -4.6931816389713585]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.344121273281729, -5.84381416772365, -4.933438622162896, -4.930010550970735, -5.8862022625421275, -6.656042344397974, -4.893357717823761]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2597530395007719, -1.6269942632161019, -1.3915865874795654, -1.304292918422511, -1.4028566140274576, -1.5248992205058671, -1.2993828821068871]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2666125914525583, -1.7191506953973066, -1.5792909415219956, -1.406556105014417, -1.621706715067528, -1.6892935292718565, -1.3665732423201304]}}