{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:12.247268", "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-Feb-18_to_2023-Feb-24_6.5_-76.0"}, "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": 2023020000705}, "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": "February 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 24 2023"}, "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": 110409.22646907679}, "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": -76.0}, "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": 6.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -79.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -75.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, -76.03], [2.75, -75.5], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [5.75, -74.85], [6.0, -74.75], [6.25, -74.85], [6.5, -74.75], [6.75, -74.85], [7.0, -74.75], [7.53, -74.97], [7.68, -75.32], [7.75, -75.35], [7.82, -75.32], [7.97, -74.97], [8.5, -74.75], [8.75, -74.85], [9.0, -74.75], [9.25, -74.85], [9.5, -74.75], [10.03, -74.97], [10.18, -75.32], [10.25, -75.35], [10.5, -75.25], [10.75, -75.35], [11.0, -75.25], [11.25, -75.35], [11.5, -75.25], [11.75, -75.35], [12.0, -75.25], [12.53, -75.47], [12.68, -75.82], [12.75, -75.85], [13.0, -75.75], [13.25, -75.85], [13.5, -75.75], [14.03, -75.97], [14.18, -76.32], [14.25, -76.35], [14.5, -76.25], [15.03, -76.47], [15.18, -76.82], [15.25, -76.85], [15.5, -76.75], [16.03, -76.97], [16.25, -77.5], [16.03, -78.03], [15.5, -78.25], [15.25, -78.15], [15.18, -78.18], [15.03, -78.53], [14.5, -78.75], [14.25, -78.65], [14.0, -78.75], [13.75, -78.65], [13.5, -78.75], [13.25, -78.65], [13.0, -78.75], [12.75, -78.65], [12.5, -78.75], [11.97, -78.53], [11.82, -78.18], [11.75, -78.15], [11.5, -78.25], [11.25, -78.15], [11.0, -78.25], [10.47, -78.03], [10.32, -77.68], [10.25, -77.65], [10.0, -77.75], [9.75, -77.65], [9.5, -77.75], [9.25, -77.65], [9.0, -77.75], [8.47, -77.53], [8.32, -77.18], [8.25, -77.15], [8.0, -77.25], [7.75, -77.15], [7.5, -77.25], [6.97, -77.03], [6.82, -76.68], [6.75, -76.65], [6.5, -76.75], [6.25, -76.65], [6.0, -76.75], [5.75, -76.65], [5.5, -76.75], [4.97, -76.53], [4.82, -76.18], [4.75, -76.15], [4.5, -76.25], [4.25, -76.15], [4.0, -76.25], [3.75, -76.15], [3.5, -76.25], [2.97, -76.03]]]]}, "2023-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, -76.03], [2.75, -75.5], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [5.75, -74.85], [6.0, -74.75], [6.25, -74.85], [6.5, -74.75], [6.75, -74.85], [7.0, -74.75], [7.53, -74.97], [7.68, -75.32], [7.75, -75.35], [7.82, -75.32], [7.97, -74.97], [8.5, -74.75], [8.75, -74.85], [9.0, -74.75], [9.25, -74.85], [9.5, -74.75], [10.03, -74.97], [10.18, -75.32], [10.25, -75.35], [10.5, -75.25], [10.75, -75.35], [11.0, -75.25], [11.25, -75.35], [11.5, -75.25], [11.75, -75.35], [12.0, -75.25], [12.53, -75.47], [12.68, -75.82], [12.75, -75.85], [13.0, -75.75], [13.25, -75.85], [13.5, -75.75], [14.03, -75.97], [14.18, -76.32], [14.25, -76.35], [14.5, -76.25], [15.03, -76.47], [15.18, -76.82], [15.25, -76.85], [15.5, -76.75], [16.03, -76.97], [16.25, -77.5], [16.03, -78.03], [15.5, -78.25], [15.25, -78.15], [15.18, -78.18], [15.03, -78.53], [14.5, -78.75], [14.25, -78.65], [14.0, -78.75], [13.75, -78.65], [13.5, -78.75], [13.25, -78.65], [13.0, -78.75], [12.75, -78.65], [12.5, -78.75], [11.97, -78.53], [11.82, -78.18], [11.75, -78.15], [11.5, -78.25], [11.25, -78.15], [11.0, -78.25], [10.47, -78.03], [10.32, -77.68], [10.25, -77.65], [10.0, -77.75], [9.75, -77.65], [9.5, -77.75], [9.25, -77.65], [9.0, -77.75], [8.47, -77.53], [8.32, -77.18], [8.25, -77.15], [8.0, -77.25], [7.75, -77.15], [7.5, -77.25], [6.97, -77.03], [6.82, -76.68], [6.75, -76.65], [6.5, -76.75], [6.25, -76.65], [6.0, -76.75], [5.75, -76.65], [5.5, -76.75], [4.97, -76.53], [4.82, -76.18], [4.75, -76.15], [4.5, -76.25], [4.25, -76.15], [4.0, -76.25], [3.75, -76.15], [3.5, -76.25], [2.97, -76.03]]]]}, "2023-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.25, -76.0], [2.47, -75.47], [2.82, -75.32], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [5.75, -74.85], [6.0, -74.75], [6.25, -74.85], [6.5, -74.75], [6.75, -74.85], [7.0, -74.75], [7.53, -74.97], [7.68, -75.32], [7.75, -75.35], [7.82, -75.32], [7.97, -74.97], [8.5, -74.75], [8.75, -74.85], [9.0, -74.75], [9.25, -74.85], [9.5, -74.75], [10.03, -74.97], [10.18, -75.32], [10.25, -75.35], [10.5, -75.25], [10.75, -75.35], [11.0, -75.25], [11.25, -75.35], [11.5, -75.25], [11.75, -75.35], [12.0, -75.25], [12.53, -75.47], [12.68, -75.82], [12.75, -75.85], [13.0, -75.75], [13.25, -75.85], [13.5, -75.75], [14.03, -75.97], [14.18, -76.32], [14.25, -76.35], [14.5, -76.25], [15.03, -76.47], [15.18, -76.82], [15.25, -76.85], [15.5, -76.75], [16.03, -76.97], [16.25, -77.5], [16.03, -78.03], [15.5, -78.25], [16.03, -78.47], [16.25, -79.0], [16.03, -79.53], [15.5, -79.75], [15.25, -79.65], [15.0, -79.75], [14.75, -79.65], [14.5, -79.75], [14.25, -79.65], [14.0, -79.75], [13.75, -79.65], [13.5, -79.75], [13.25, -79.65], [13.0, -79.75], [12.47, -79.53], [12.32, -79.18], [12.25, -79.15], [12.0, -79.25], [11.75, -79.15], [11.5, -79.25], [11.25, -79.15], [11.0, -79.25], [10.47, -79.03], [10.32, -78.68], [10.25, -78.65], [10.0, -78.75], [9.75, -78.65], [9.5, -78.75], [9.25, -78.65], [9.0, -78.75], [8.47, -78.53], [8.32, -78.18], [8.25, -78.15], [8.0, -78.25], [7.75, -78.15], [7.5, -78.25], [7.25, -78.15], [7.0, -78.25], [6.47, -78.03], [6.32, -77.68], [6.25, -77.65], [6.0, -77.75], [5.75, -77.65], [5.5, -77.75], [5.25, -77.65], [5.0, -77.75], [4.75, -77.65], [4.5, -77.75], [3.97, -77.53], [3.82, -77.18], [3.75, -77.15], [3.5, -77.25], [2.97, -77.03], [2.82, -76.68], [2.47, -76.53], [2.25, -76.0]], [[15.25, -78.15], [15.18, -78.18], [15.15, -78.25], [15.18, -78.32], [15.25, -78.35], [15.5, -78.25], [15.25, -78.15]]]]}, "2023-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, -75.47], [2.82, -75.32], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [6.03, -74.97], [6.18, -75.32], [6.25, -75.35], [6.5, -75.25], [6.75, -75.35], [7.0, -75.25], [7.53, -75.47], [7.68, -75.82], [7.75, -75.85], [8.0, -75.75], [8.25, -75.85], [8.5, -75.75], [8.75, -75.85], [9.0, -75.75], [9.25, -75.85], [9.5, -75.75], [9.75, -75.85], [10.0, -75.75], [10.53, -75.97], [10.68, -76.32], [10.75, -76.35], [11.0, -76.25], [11.25, -76.35], [11.5, -76.25], [12.03, -76.47], [12.18, -76.82], [12.25, -76.85], [12.5, -76.75], [12.75, -76.85], [13.0, -76.75], [13.53, -76.97], [13.68, -77.32], [13.75, -77.35], [14.0, -77.25], [14.25, -77.35], [14.5, -77.25], [15.03, -77.47], [15.25, -78.0], [15.15, -78.25], [15.18, -78.32], [15.25, -78.35], [15.5, -78.25], [16.03, -78.47], [16.18, -78.82], [16.53, -78.97], [16.75, -79.5], [16.53, -80.03], [16.0, -80.25], [15.75, -80.15], [15.5, -80.25], [15.25, -80.15], [15.0, -80.25], [14.75, -80.15], [14.5, -80.25], [14.25, -80.15], [14.0, -80.25], [13.75, -80.15], [13.5, -80.25], [13.25, -80.15], [13.0, -80.25], [12.75, -80.15], [12.5, -80.25], [12.25, -80.15], [12.0, -80.25], [11.75, -80.15], [11.5, -80.25], [11.25, -80.15], [11.0, -80.25], [10.47, -80.03], [10.32, -79.68], [10.25, -79.65], [10.0, -79.75], [9.75, -79.65], [9.5, -79.75], [9.25, -79.65], [9.0, -79.75], [8.75, -79.65], [8.5, -79.75], [8.25, -79.65], [8.0, -79.75], [7.47, -79.53], [7.32, -79.18], [7.25, -79.15], [7.0, -79.25], [6.75, -79.15], [6.5, -79.25], [6.25, -79.15], [6.0, -79.25], [5.47, -79.03], [5.32, -78.68], [5.25, -78.65], [5.0, -78.75], [4.47, -78.53], [4.32, -78.18], [3.97, -78.03], [3.82, -77.68], [3.47, -77.53], [3.32, -77.18], [3.25, -77.15], [3.0, -77.25], [2.47, -77.03], [2.25, -76.5], [2.35, -76.25], [2.25, -76.0], [2.47, -75.47]]]]}, "2023-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, -75.47], [2.82, -75.32], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [6.03, -74.97], [6.18, -75.32], [6.25, -75.35], [6.32, -75.32], [6.47, -74.97], [7.0, -74.75], [7.25, -74.85], [7.5, -74.75], [7.75, -74.85], [8.0, -74.75], [8.25, -74.85], [8.5, -74.75], [9.03, -74.97], [9.18, -75.32], [9.25, -75.35], [9.5, -75.25], [9.75, -75.35], [10.0, -75.25], [10.53, -75.47], [10.75, -76.0], [10.65, -76.25], [10.68, -76.32], [10.75, -76.35], [11.0, -76.25], [11.25, -76.35], [11.5, -76.25], [12.03, -76.47], [12.18, -76.82], [12.25, -76.85], [12.5, -76.75], [12.75, -76.85], [13.0, -76.75], [13.53, -76.97], [13.68, -77.32], [13.75, -77.35], [14.0, -77.25], [14.53, -77.47], [14.68, -77.82], [15.03, -77.97], [15.18, -78.32], [15.25, -78.35], [15.5, -78.25], [16.03, -78.47], [16.18, -78.82], [16.53, -78.97], [16.75, -79.5], [16.53, -80.03], [16.0, -80.25], [15.75, -80.15], [15.5, -80.25], [15.25, -80.15], [15.0, -80.25], [14.75, -80.15], [14.5, -80.25], [14.25, -80.15], [14.0, -80.25], [13.75, -80.15], [13.5, -80.25], [13.25, -80.15], [13.0, -80.25], [12.75, -80.15], [12.5, -80.25], [12.25, -80.15], [12.0, -80.25], [11.75, -80.15], [11.5, -80.25], [11.25, -80.15], [11.0, -80.25], [10.47, -80.03], [10.32, -79.68], [10.25, -79.65], [10.0, -79.75], [9.75, -79.65], [9.5, -79.75], [9.25, -79.65], [9.0, -79.75], [8.75, -79.65], [8.5, -79.75], [8.25, -79.65], [8.0, -79.75], [7.47, -79.53], [7.32, -79.18], [7.25, -79.15], [7.0, -79.25], [6.75, -79.15], [6.5, -79.25], [6.25, -79.15], [6.0, -79.25], [5.47, -79.03], [5.32, -78.68], [5.25, -78.65], [5.0, -78.75], [4.47, -78.53], [4.32, -78.18], [3.97, -78.03], [3.82, -77.68], [3.47, -77.53], [3.32, -77.18], [3.25, -77.15], [3.0, -77.25], [2.47, -77.03], [2.25, -76.5], [2.35, -76.25], [2.25, -76.0], [2.47, -75.47]]]]}, "2023-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, -75.47], [2.82, -75.32], [2.97, -74.97], [3.5, -74.75], [3.75, -74.85], [4.0, -74.75], [4.25, -74.85], [4.5, -74.75], [4.75, -74.85], [5.0, -74.75], [5.25, -74.85], [5.5, -74.75], [6.03, -74.97], [6.18, -75.32], [6.25, -75.35], [6.32, -75.32], [6.47, -74.97], [7.0, -74.75], [7.25, -74.85], [7.5, -74.75], [7.75, -74.85], [8.0, -74.75], [8.25, -74.85], [8.5, -74.75], [9.03, -74.97], [9.18, -75.32], [9.25, -75.35], [9.5, -75.25], [9.75, -75.35], [10.0, -75.25], [10.53, -75.47], [10.75, -76.0], [10.65, -76.25], [10.68, -76.32], [10.75, -76.35], [11.0, -76.25], [11.25, -76.35], [11.5, -76.25], [12.03, -76.47], [12.18, -76.82], [12.25, -76.85], [12.5, -76.75], [13.03, -76.97], [13.18, -77.32], [13.53, -77.47], [13.68, -77.82], [14.03, -77.97], [14.18, -78.32], [14.25, -78.35], [14.5, -78.25], [14.75, -78.35], [15.0, -78.25], [15.53, -78.47], [15.68, -78.82], [15.75, -78.85], [16.0, -78.75], [16.53, -78.97], [16.75, -79.5], [16.53, -80.03], [16.0, -80.25], [15.75, -80.15], [15.5, -80.25], [15.25, -80.15], [15.0, -80.25], [14.75, -80.15], [14.5, -80.25], [14.25, -80.15], [14.0, -80.25], [13.75, -80.15], [13.5, -80.25], [13.25, -80.15], [13.0, -80.25], [12.75, -80.15], [12.5, -80.25], [12.25, -80.15], [12.0, -80.25], [11.75, -80.15], [11.5, -80.25], [11.25, -80.15], [11.0, -80.25], [10.47, -80.03], [10.32, -79.68], [10.25, -79.65], [10.0, -79.75], [9.75, -79.65], [9.5, -79.75], [9.25, -79.65], [9.0, -79.75], [8.75, -79.65], [8.5, -79.75], [8.25, -79.65], [8.0, -79.75], [7.47, -79.53], [7.32, -79.18], [7.25, -79.15], [7.0, -79.25], [6.75, -79.15], [6.5, -79.25], [6.25, -79.15], [6.0, -79.25], [5.47, -79.03], [5.32, -78.68], [5.25, -78.65], [5.0, -78.75], [4.47, -78.53], [4.32, -78.18], [3.97, -78.03], [3.82, -77.68], [3.47, -77.53], [3.32, -77.18], [3.25, -77.15], [3.0, -77.25], [2.47, -77.03], [2.25, -76.5], [2.35, -76.25], [2.25, -76.0], [2.47, -75.47]]]]}, "2023-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.0, -74.75], [7.25, -74.85], [7.5, -74.75], [7.75, -74.85], [8.0, -74.75], [8.25, -74.85], [8.5, -74.75], [9.03, -74.97], [9.18, -75.32], [9.25, -75.35], [9.5, -75.25], [9.75, -75.35], [10.0, -75.25], [10.53, -75.47], [10.75, -76.0], [10.65, -76.25], [10.75, -76.5], [10.53, -77.03], [10.0, -77.25], [9.75, -77.15], [9.5, -77.25], [9.25, -77.15], [9.0, -77.25], [8.75, -77.15], [8.5, -77.25], [8.25, -77.15], [8.0, -77.25], [7.47, -77.03], [7.32, -76.68], [7.25, -76.65], [7.0, -76.75], [6.75, -76.65], [6.5, -76.75], [5.97, -76.53], [5.75, -76.0], [5.97, -75.47], [6.32, -75.32], [6.47, -74.97], [7.0, -74.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.064616389941449}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.8175079946746155}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-41.64380137767188, -42.70742353521547, -42.24958228647884, -41.902874893590734, -42.846012187560234, -43.653709212587984, -42.784110721824646]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-43.01298023225988, -44.42118857657229, -43.90888303276742, -43.48145179094834, -44.27937665507238, -44.76667221647401, -43.38101276587096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.053239945014317, -6.875442309359478, -6.553566015803574, -6.3958323243276665, -7.056842218174323, -7.664825032089721, -6.036103736205303]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.342199710949501, -7.910195538309637, -7.5716172403101325, -7.347535201183433, -8.56601570877939, -9.064616389941449, -6.3126940799079705]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.368907597738423, -1.5330447635427982, -1.440772828674255, -1.39475217684702, -1.4922959690772242, -1.5975220011383855, -1.229363865637283]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.426158045428817, -1.7372861269733204, -1.6312106804857531, -1.5708123185111802, -1.7903734036430567, -1.87487823587815, -1.2795986722532455]}}