{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:30.493667", "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-Jun-05_to_2023-Jun-08_354.0_-68.5"}, "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": 2023060000217}, "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": "June 05 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 08 2023"}, "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": 125934.11084157908}, "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", "Southern-Ocean"]}, "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": ["Southern Ocean"]}, "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": -68.5}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 361.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -70.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -66.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.03, -71.03], [-10.25, -70.5], [-10.03, -69.97], [-9.5, -69.75], [-8.97, -69.97], [-8.75, -70.5], [-8.97, -71.03], [-9.5, -71.25], [-10.03, -71.03]]], [[[-6.25, -69.35], [-6.0, -69.25], [-5.75, -69.35], [-5.68, -69.32], [-5.53, -68.97], [-5.0, -68.75], [-4.75, -68.85], [-4.5, -68.75], [-4.25, -68.85], [-4.0, -68.75], [-3.75, -68.85], [-3.68, -68.82], [-3.53, -68.47], [-3.0, -68.25], [-2.75, -68.35], [-2.5, -68.25], [-2.25, -68.35], [-2.0, -68.25], [-1.75, -68.35], [-1.5, -68.25], [-1.25, -68.35], [-1.0, -68.25], [-0.75, -68.35], [-0.68, -68.32], [-0.53, -67.97], [0.0, -67.75], [0.25, -67.85], [0.5, -67.75], [1.03, -67.97], [1.25, -68.5], [1.15, -68.75], [1.18, -68.82], [1.53, -68.97], [1.75, -69.5], [1.53, -70.03], [1.0, -70.25], [0.75, -70.15], [0.5, -70.25], [0.25, -70.15], [0.0, -70.25], [-0.25, -70.15], [-0.5, -70.25], [-0.75, -70.15], [-1.0, -70.25], [-1.25, -70.15], [-1.32, -70.18], [-1.47, -70.53], [-2.0, -70.75], [-2.25, -70.65], [-2.5, -70.75], [-2.75, -70.65], [-3.0, -70.75], [-3.25, -70.65], [-3.5, -70.75], [-3.75, -70.65], [-3.82, -70.68], [-3.97, -71.03], [-4.5, -71.25], [-4.75, -71.15], [-5.0, -71.25], [-5.25, -71.15], [-5.5, -71.25], [-5.75, -71.15], [-6.0, -71.25], [-6.25, -71.15], [-6.5, -71.25], [-6.75, -71.15], [-7.0, -71.25], [-7.53, -71.03], [-7.75, -70.5], [-7.53, -69.97], [-7.18, -69.82], [-7.03, -69.47], [-6.5, -69.25], [-6.25, -69.35]]]]}, "2023-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, -69.47], [-12.5, -69.25], [-12.25, -69.35], [-12.18, -69.32], [-12.03, -68.97], [-11.5, -68.75], [-11.25, -68.85], [-11.0, -68.75], [-10.75, -68.85], [-10.68, -68.82], [-10.53, -68.47], [-10.0, -68.25], [-9.75, -68.35], [-9.5, -68.25], [-9.25, -68.35], [-9.18, -68.32], [-9.03, -67.97], [-8.5, -67.75], [-8.25, -67.85], [-8.18, -67.82], [-8.03, -67.47], [-7.5, -67.25], [-7.25, -67.35], [-7.0, -67.25], [-6.75, -67.35], [-6.5, -67.25], [-6.25, -67.35], [-6.18, -67.32], [-6.03, -66.97], [-5.5, -66.75], [-5.25, -66.85], [-5.0, -66.75], [-4.75, -66.85], [-4.5, -66.75], [-4.25, -66.85], [-4.18, -66.82], [-4.03, -66.47], [-3.5, -66.25], [-3.25, -66.35], [-3.0, -66.25], [-2.75, -66.35], [-2.5, -66.25], [-2.25, -66.35], [-2.0, -66.25], [-1.75, -66.35], [-1.5, -66.25], [-1.25, -66.35], [-1.18, -66.32], [-1.03, -65.97], [-0.5, -65.75], [-0.25, -65.85], [0.0, -65.75], [0.25, -65.85], [0.5, -65.75], [1.03, -65.97], [1.25, -66.5], [1.03, -67.03], [0.5, -67.25], [0.25, -67.15], [0.18, -67.18], [0.03, -67.53], [-0.32, -67.68], [-0.43, -67.93], [0.0, -67.75], [0.25, -67.85], [0.5, -67.75], [1.03, -67.97], [1.25, -68.5], [1.15, -68.75], [1.18, -68.82], [1.53, -68.97], [1.75, -69.5], [1.53, -70.03], [1.0, -70.25], [0.75, -70.15], [0.5, -70.25], [0.25, -70.15], [0.0, -70.25], [-0.25, -70.15], [-0.5, -70.25], [-0.75, -70.15], [-1.0, -70.25], [-1.25, -70.15], [-1.32, -70.18], [-1.47, -70.53], [-2.0, -70.75], [-2.25, -70.65], [-2.5, -70.75], [-2.75, -70.65], [-3.0, -70.75], [-3.25, -70.65], [-3.5, -70.75], [-3.75, -70.65], [-3.82, -70.68], [-3.97, -71.03], [-4.5, -71.25], [-4.75, -71.15], [-5.0, -71.25], [-5.25, -71.15], [-5.5, -71.25], [-5.75, -71.15], [-6.0, -71.25], [-6.25, -71.15], [-6.5, -71.25], [-6.75, -71.15], [-7.0, -71.25], [-7.53, -71.03], [-7.75, -70.5], [-7.57, -70.07], [-8.0, -70.25], [-8.25, -70.15], [-8.5, -70.25], [-8.75, -70.15], [-8.87, -70.2], [-8.75, -70.5], [-8.97, -71.03], [-9.5, -71.25], [-10.03, -71.03], [-10.18, -70.68], [-10.25, -70.65], [-10.5, -70.75], [-10.75, -70.65], [-11.0, -70.75], [-11.25, -70.65], [-11.32, -70.68], [-11.47, -71.03], [-12.0, -71.25], [-12.25, -71.15], [-12.5, -71.25], [-13.03, -71.03], [-13.25, -70.5], [-13.15, -70.25], [-13.25, -70.0], [-13.03, -69.47]], [[-0.75, -68.35], [-0.68, -68.32], [-0.57, -68.07], [-1.0, -68.25], [-0.75, -68.35]], [[-1.25, -68.15], [-1.32, -68.18], [-1.37, -68.3], [-1.25, -68.35], [-1.0, -68.25], [-1.25, -68.15]], [[-7.25, -69.65], [-7.32, -69.68], [-7.43, -69.93], [-7.18, -69.82], [-7.12, -69.7], [-7.25, -69.65]]]]}, "2023-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, -69.47], [-12.5, -69.25], [-12.25, -69.35], [-12.18, -69.32], [-12.03, -68.97], [-11.5, -68.75], [-11.25, -68.85], [-11.0, -68.75], [-10.75, -68.85], [-10.68, -68.82], [-10.53, -68.47], [-10.0, -68.25], [-9.75, -68.35], [-9.5, -68.25], [-9.25, -68.35], [-9.18, -68.32], [-9.03, -67.97], [-8.5, -67.75], [-8.25, -67.85], [-8.18, -67.82], [-8.03, -67.47], [-7.5, -67.25], [-7.25, -67.35], [-7.0, -67.25], [-6.75, -67.35], [-6.5, -67.25], [-6.25, -67.35], [-6.18, -67.32], [-6.03, -66.97], [-5.5, -66.75], [-5.25, -66.85], [-5.0, -66.75], [-4.75, -66.85], [-4.5, -66.75], [-4.25, -66.85], [-4.18, -66.82], [-4.03, -66.47], [-3.5, -66.25], [-3.25, -66.35], [-3.0, -66.25], [-2.75, -66.35], [-2.5, -66.25], [-2.25, -66.35], [-2.0, -66.25], [-1.75, -66.35], [-1.5, -66.25], [-1.25, -66.35], [-1.18, -66.32], [-1.03, -65.97], [-0.5, -65.75], [-0.25, -65.85], [0.0, -65.75], [0.25, -65.85], [0.5, -65.75], [1.03, -65.97], [1.25, -66.5], [1.03, -67.03], [0.5, -67.25], [0.25, -67.15], [0.18, -67.18], [0.03, -67.53], [-0.32, -67.68], [-0.43, -67.93], [0.0, -67.75], [0.25, -67.85], [0.5, -67.75], [1.03, -67.97], [1.25, -68.5], [1.15, -68.75], [1.18, -68.82], [1.53, -68.97], [1.75, -69.5], [1.53, -70.03], [1.0, -70.25], [0.75, -70.15], [0.5, -70.25], [0.25, -70.15], [0.0, -70.25], [-0.25, -70.15], [-0.5, -70.25], [-0.75, -70.15], [-1.0, -70.25], [-1.25, -70.15], [-1.32, -70.18], [-1.47, -70.53], [-2.0, -70.75], [-2.25, -70.65], [-2.5, -70.75], [-2.75, -70.65], [-3.0, -70.75], [-3.25, -70.65], [-3.5, -70.75], [-3.75, -70.65], [-3.82, -70.68], [-3.97, -71.03], [-4.5, -71.25], [-4.75, -71.15], [-5.0, -71.25], [-5.25, -71.15], [-5.5, -71.25], [-5.75, -71.15], [-6.0, -71.25], [-6.25, -71.15], [-6.5, -71.25], [-6.75, -71.15], [-7.0, -71.25], [-7.53, -71.03], [-7.75, -70.5], [-7.57, -70.07], [-8.0, -70.25], [-8.25, -70.15], [-8.5, -70.25], [-8.75, -70.15], [-8.87, -70.2], [-8.75, -70.5], [-8.97, -71.03], [-9.5, -71.25], [-10.03, -71.03], [-10.18, -70.68], [-10.25, -70.65], [-10.5, -70.75], [-10.75, -70.65], [-11.0, -70.75], [-11.25, -70.65], [-11.32, -70.68], [-11.47, -71.03], [-12.0, -71.25], [-12.25, -71.15], [-12.5, -71.25], [-13.03, -71.03], [-13.25, -70.5], [-13.15, -70.25], [-13.25, -70.0], [-13.03, -69.47]], [[-0.75, -68.35], [-0.68, -68.32], [-0.57, -68.07], [-1.0, -68.25], [-0.75, -68.35]], [[-1.25, -68.15], [-1.32, -68.18], [-1.37, -68.3], [-1.25, -68.35], [-1.0, -68.25], [-1.25, -68.15]], [[-7.25, -69.65], [-7.32, -69.68], [-7.43, -69.93], [-7.18, -69.82], [-7.12, -69.7], [-7.25, -69.65]]]]}, "2023-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, -69.47], [-12.5, -69.25], [-12.25, -69.35], [-12.18, -69.32], [-12.03, -68.97], [-11.5, -68.75], [-11.25, -68.85], [-11.0, -68.75], [-10.75, -68.85], [-10.68, -68.82], [-10.53, -68.47], [-10.0, -68.25], [-9.75, -68.35], [-9.5, -68.25], [-9.25, -68.35], [-9.18, -68.32], [-9.03, -67.97], [-8.5, -67.75], [-8.25, -67.85], [-8.18, -67.82], [-8.03, -67.47], [-7.5, -67.25], [-7.25, -67.35], [-7.0, -67.25], [-6.75, -67.35], [-6.5, -67.25], [-6.25, -67.35], [-6.18, -67.32], [-6.03, -66.97], [-5.5, -66.75], [-5.25, -66.85], [-5.0, -66.75], [-4.75, -66.85], [-4.5, -66.75], [-4.25, -66.85], [-4.18, -66.82], [-4.03, -66.47], [-3.5, -66.25], [-3.25, -66.35], [-3.0, -66.25], [-2.75, -66.35], [-2.5, -66.25], [-2.25, -66.35], [-2.0, -66.25], [-1.75, -66.35], [-1.5, -66.25], [-1.25, -66.35], [-1.18, -66.32], [-1.03, -65.97], [-0.5, -65.75], [-0.25, -65.85], [0.0, -65.75], [0.25, -65.85], [0.5, -65.75], [1.03, -65.97], [1.25, -66.5], [1.03, -67.03], [0.5, -67.25], [0.25, -67.15], [0.18, -67.18], [0.03, -67.53], [-0.32, -67.68], [-0.47, -68.03], [-1.0, -68.25], [-1.25, -68.15], [-1.32, -68.18], [-1.47, -68.53], [-2.0, -68.75], [-2.25, -68.65], [-2.32, -68.68], [-2.47, -69.03], [-3.0, -69.25], [-3.25, -69.15], [-3.32, -69.18], [-3.47, -69.53], [-4.0, -69.75], [-4.25, -69.65], [-4.5, -69.75], [-4.75, -69.65], [-5.0, -69.75], [-5.25, -69.65], [-5.5, -69.75], [-5.75, -69.65], [-6.0, -69.75], [-6.25, -69.65], [-6.5, -69.75], [-6.75, -69.65], [-7.0, -69.75], [-7.25, -69.65], [-7.32, -69.68], [-7.47, -70.03], [-8.0, -70.25], [-8.25, -70.15], [-8.5, -70.25], [-8.75, -70.15], [-9.0, -70.25], [-9.25, -70.15], [-9.32, -70.18], [-9.47, -70.53], [-10.0, -70.75], [-10.25, -70.65], [-10.5, -70.75], [-10.75, -70.65], [-11.0, -70.75], [-11.25, -70.65], [-11.32, -70.68], [-11.47, -71.03], [-12.0, -71.25], [-12.25, -71.15], [-12.5, -71.25], [-13.03, -71.03], [-13.25, -70.5], [-13.15, -70.25], [-13.25, -70.0], [-13.03, -69.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.319431958771816}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.783395645482834}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.80580917331497, -24.08913760436971, -25.153617133462575, -24.705549092764358]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.41908033718866, -25.95883993211939, -28.338691968558237, -27.555327080672555]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.059159805710296, -8.623460524711728, -9.618408719407828, -9.231143931572069]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.6949016874784775, -10.237663837515584, -12.319431958771816, -11.778982178953811]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4542555394749823, -1.7598055960700125, -1.9289194902904734, -1.7238940239358156]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.724021420392961, -2.22482670306479, -2.3271160087624843, -2.0689246194151103]}}