{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-27 23:16:20.384392", "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": "2026-Jul-29_to_2026-Jul-31_58.5_-72.5"}, "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": 2026070000940}, "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 29 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 31 2026"}, "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": 60934.487706089836}, "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": -72.5}, "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": 58.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "58.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 54.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 63.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -74.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -71.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, -71.97], [55.0, -71.75], [55.25, -71.85], [55.5, -71.75], [55.75, -71.85], [56.0, -71.75], [56.25, -71.85], [56.5, -71.75], [56.75, -71.85], [57.0, -71.75], [57.25, -71.85], [57.32, -71.82], [57.47, -71.47], [58.0, -71.25], [58.25, -71.35], [58.5, -71.25], [58.75, -71.35], [59.0, -71.25], [59.25, -71.35], [59.5, -71.25], [59.75, -71.35], [60.0, -71.25], [60.25, -71.35], [60.5, -71.25], [60.75, -71.35], [61.0, -71.25], [61.25, -71.35], [61.5, -71.25], [61.75, -71.35], [62.0, -71.25], [62.25, -71.35], [62.5, -71.25], [62.75, -71.35], [63.0, -71.25], [63.53, -71.47], [63.68, -71.82], [64.03, -71.97], [64.25, -72.5], [64.15, -72.75], [64.25, -73.0], [64.03, -73.53], [63.68, -73.68], [63.53, -74.03], [63.0, -74.25], [62.75, -74.15], [62.68, -74.18], [62.53, -74.53], [62.0, -74.75], [61.75, -74.65], [61.5, -74.75], [61.0, -74.54], [60.5, -74.75], [60.0, -74.54], [59.5, -74.75], [58.97, -74.53], [58.82, -74.18], [58.75, -74.15], [58.5, -74.25], [58.25, -74.15], [58.0, -74.25], [57.75, -74.15], [57.5, -74.25], [57.25, -74.15], [57.0, -74.25], [56.75, -74.15], [56.5, -74.25], [56.25, -74.15], [56.0, -74.25], [55.75, -74.15], [55.5, -74.25], [55.25, -74.15], [55.0, -74.25], [54.47, -74.03], [54.25, -73.5], [54.46, -73.0], [54.25, -72.5], [54.47, -71.97]]]]}, "2026-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, -71.97], [55.0, -71.75], [55.25, -71.85], [55.5, -71.75], [55.75, -71.85], [56.0, -71.75], [56.25, -71.85], [56.5, -71.75], [56.75, -71.85], [57.0, -71.75], [57.25, -71.85], [57.32, -71.82], [57.47, -71.47], [58.0, -71.25], [58.25, -71.35], [58.5, -71.25], [58.75, -71.35], [59.0, -71.25], [59.25, -71.35], [59.5, -71.25], [59.75, -71.35], [60.0, -71.25], [60.25, -71.35], [60.5, -71.25], [60.75, -71.35], [61.0, -71.25], [61.25, -71.35], [61.5, -71.25], [61.75, -71.35], [62.0, -71.25], [62.25, -71.35], [62.5, -71.25], [62.75, -71.35], [63.0, -71.25], [63.53, -71.47], [63.68, -71.82], [64.03, -71.97], [64.25, -72.5], [64.15, -72.75], [64.25, -73.0], [64.03, -73.53], [63.68, -73.68], [63.53, -74.03], [63.0, -74.25], [62.75, -74.15], [62.68, -74.18], [62.53, -74.53], [62.0, -74.75], [61.75, -74.65], [61.5, -74.75], [61.0, -74.54], [60.5, -74.75], [60.0, -74.54], [59.5, -74.75], [58.97, -74.53], [58.82, -74.18], [58.75, -74.15], [58.5, -74.25], [58.25, -74.15], [58.0, -74.25], [57.75, -74.15], [57.5, -74.25], [57.25, -74.15], [57.0, -74.25], [56.75, -74.15], [56.5, -74.25], [56.25, -74.15], [56.0, -74.25], [55.75, -74.15], [55.5, -74.25], [55.25, -74.15], [55.0, -74.25], [54.47, -74.03], [54.25, -73.5], [54.46, -73.0], [54.25, -72.5], [54.47, -71.97]]]]}, "2026-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[54.47, -71.97], [55.0, -71.75], [55.25, -71.85], [55.5, -71.75], [55.75, -71.85], [56.0, -71.75], [56.25, -71.85], [56.5, -71.75], [56.75, -71.85], [57.0, -71.75], [57.25, -71.85], [57.32, -71.82], [57.47, -71.47], [58.0, -71.25], [58.25, -71.35], [58.5, -71.25], [58.75, -71.35], [59.0, -71.25], [59.25, -71.35], [59.5, -71.25], [59.75, -71.35], [60.0, -71.25], [60.25, -71.35], [60.5, -71.25], [60.75, -71.35], [61.0, -71.25], [61.25, -71.35], [61.5, -71.25], [61.75, -71.35], [62.0, -71.25], [62.25, -71.35], [62.5, -71.25], [62.75, -71.35], [63.0, -71.25], [63.53, -71.47], [63.68, -71.82], [64.03, -71.97], [64.25, -72.5], [64.15, -72.75], [64.25, -73.0], [64.03, -73.53], [63.68, -73.68], [63.53, -74.03], [63.0, -74.25], [62.75, -74.15], [62.68, -74.18], [62.53, -74.53], [62.0, -74.75], [61.75, -74.65], [61.5, -74.75], [61.0, -74.54], [60.5, -74.75], [60.0, -74.54], [59.5, -74.75], [58.97, -74.53], [58.82, -74.18], [58.75, -74.15], [58.5, -74.25], [58.25, -74.15], [58.0, -74.25], [57.75, -74.15], [57.5, -74.25], [57.25, -74.15], [57.0, -74.25], [56.75, -74.15], [56.5, -74.25], [56.25, -74.15], [56.0, -74.25], [55.75, -74.15], [55.5, -74.25], [55.25, -74.15], [55.0, -74.25], [54.47, -74.03], [54.25, -73.5], [54.46, -73.0], [54.25, -72.5], [54.47, -71.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.090351669672316}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.249466530390273}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-49.06125333605709, -50.06755225527934, -49.56971698210609]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-55.881790542602516, -59.46175676981605, -57.85820617675779]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.839090617184977, -7.756526155780955, -7.152782818204888]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.4886457681941465, -10.090351669672316, -8.852092999794593]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1260264989117945, -1.2771733332743322, -1.177272289693859]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2579025129604942, -1.5297468415248057, -1.3940940150884293]}}