{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:21.357382", "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": "2018-Mar-15_to_2018-Mar-18_295.0_-65.5"}, "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": 2018030000582}, "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": "March 15 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 18 2018"}, "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": 89231.86713480557}, "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": ["Southern-Ocean", "W.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": ["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": -65.5}, "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": 295.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "295.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 296.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -67.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -63.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.53, -64.47], [-66.0, -64.25], [-65.47, -64.47], [-65.32, -64.82], [-65.25, -64.85], [-65.0, -64.75], [-64.47, -64.97], [-64.32, -65.32], [-64.25, -65.35], [-64.0, -65.25], [-63.75, -65.35], [-63.5, -65.25], [-62.97, -65.47], [-62.75, -66.0], [-62.97, -66.53], [-63.5, -66.75], [-63.75, -66.65], [-64.0, -66.75], [-64.25, -66.65], [-64.5, -66.75], [-65.03, -66.53], [-65.18, -66.18], [-65.25, -66.15], [-65.5, -66.25], [-65.75, -66.15], [-66.0, -66.25], [-66.53, -66.03], [-66.75, -65.5], [-66.65, -65.25], [-66.75, -65.0], [-66.53, -64.47]]]]}, "2018-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, -66.0], [-74.03, -65.47], [-73.5, -65.25], [-73.25, -65.35], [-73.0, -65.25], [-72.75, -65.35], [-72.68, -65.32], [-72.53, -64.97], [-72.0, -64.75], [-71.75, -64.85], [-71.5, -64.75], [-71.25, -64.85], [-71.0, -64.75], [-70.75, -64.85], [-70.5, -64.75], [-70.25, -64.85], [-70.18, -64.82], [-70.03, -64.47], [-69.5, -64.25], [-69.25, -64.35], [-69.0, -64.25], [-68.75, -64.35], [-68.5, -64.25], [-68.25, -64.35], [-68.18, -64.32], [-68.03, -63.97], [-67.5, -63.75], [-67.0, -63.96], [-66.68, -63.82], [-66.53, -63.47], [-66.0, -63.25], [-65.47, -63.47], [-65.25, -64.0], [-65.35, -64.25], [-65.25, -64.5], [-65.35, -64.75], [-65.32, -64.82], [-65.25, -64.85], [-65.0, -64.75], [-64.47, -64.97], [-64.32, -65.32], [-64.25, -65.35], [-64.0, -65.25], [-63.75, -65.35], [-63.5, -65.25], [-62.97, -65.47], [-62.75, -66.0], [-62.97, -66.53], [-63.5, -66.75], [-63.75, -66.65], [-64.0, -66.75], [-64.25, -66.65], [-64.5, -66.75], [-65.03, -66.53], [-65.18, -66.18], [-65.25, -66.15], [-65.5, -66.25], [-65.75, -66.15], [-66.0, -66.25], [-66.25, -66.15], [-66.32, -66.18], [-66.47, -66.53], [-66.82, -66.68], [-66.97, -67.03], [-67.5, -67.25], [-67.75, -67.15], [-68.0, -67.25], [-68.25, -67.15], [-68.5, -67.25], [-68.75, -67.15], [-68.82, -67.18], [-68.97, -67.53], [-69.32, -67.68], [-69.47, -68.03], [-70.0, -68.25], [-70.25, -68.15], [-70.5, -68.25], [-70.75, -68.15], [-71.0, -68.25], [-71.25, -68.15], [-71.5, -68.25], [-72.03, -68.03], [-72.18, -67.68], [-72.25, -67.65], [-72.5, -67.75], [-72.75, -67.65], [-73.0, -67.75], [-73.25, -67.65], [-73.5, -67.75], [-73.75, -67.65], [-74.0, -67.75], [-74.53, -67.53], [-74.75, -67.0], [-74.53, -66.47], [-74.18, -66.32], [-74.15, -66.25], [-74.25, -66.0]]]]}, "2018-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, -66.0], [-74.03, -65.47], [-73.5, -65.25], [-73.25, -65.35], [-73.0, -65.25], [-72.75, -65.35], [-72.68, -65.32], [-72.53, -64.97], [-72.0, -64.75], [-71.75, -64.85], [-71.5, -64.75], [-71.25, -64.85], [-71.0, -64.75], [-70.75, -64.85], [-70.5, -64.75], [-70.25, -64.85], [-70.18, -64.82], [-70.03, -64.47], [-69.5, -64.25], [-69.25, -64.35], [-69.0, -64.25], [-68.75, -64.35], [-68.5, -64.25], [-68.25, -64.35], [-68.18, -64.32], [-68.03, -63.97], [-67.5, -63.75], [-67.0, -63.96], [-66.68, -63.82], [-66.53, -63.47], [-66.0, -63.25], [-65.47, -63.47], [-65.25, -64.0], [-65.35, -64.25], [-65.25, -64.5], [-65.35, -64.75], [-65.32, -64.82], [-65.25, -64.85], [-65.0, -64.75], [-64.47, -64.97], [-64.32, -65.32], [-64.25, -65.35], [-64.0, -65.25], [-63.75, -65.35], [-63.5, -65.25], [-62.97, -65.47], [-62.75, -66.0], [-62.97, -66.53], [-63.5, -66.75], [-63.75, -66.65], [-64.0, -66.75], [-64.25, -66.65], [-64.5, -66.75], [-65.03, -66.53], [-65.18, -66.18], [-65.25, -66.15], [-65.5, -66.25], [-65.75, -66.15], [-66.0, -66.25], [-66.25, -66.15], [-66.32, -66.18], [-66.47, -66.53], [-66.82, -66.68], [-66.97, -67.03], [-67.5, -67.25], [-67.75, -67.15], [-68.0, -67.25], [-68.25, -67.15], [-68.5, -67.25], [-68.75, -67.15], [-68.82, -67.18], [-68.97, -67.53], [-69.32, -67.68], [-69.47, -68.03], [-70.0, -68.25], [-70.25, -68.15], [-70.5, -68.25], [-70.75, -68.15], [-71.0, -68.25], [-71.25, -68.15], [-71.5, -68.25], [-72.03, -68.03], [-72.18, -67.68], [-72.25, -67.65], [-72.5, -67.75], [-72.75, -67.65], [-73.0, -67.75], [-73.25, -67.65], [-73.5, -67.75], [-73.75, -67.65], [-74.0, -67.75], [-74.53, -67.53], [-74.75, -67.0], [-74.53, -66.47], [-74.18, -66.32], [-74.15, -66.25], [-74.25, -66.0]]]]}, "2018-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, -66.0], [-74.03, -65.47], [-73.5, -65.25], [-73.25, -65.35], [-73.0, -65.25], [-72.75, -65.35], [-72.68, -65.32], [-72.53, -64.97], [-72.0, -64.75], [-71.75, -64.85], [-71.5, -64.75], [-71.25, -64.85], [-71.0, -64.75], [-70.75, -64.85], [-70.5, -64.75], [-70.25, -64.85], [-70.18, -64.82], [-70.03, -64.47], [-69.5, -64.25], [-69.25, -64.35], [-69.0, -64.25], [-68.75, -64.35], [-68.5, -64.25], [-68.25, -64.35], [-68.18, -64.32], [-68.03, -63.97], [-67.5, -63.75], [-67.0, -63.96], [-66.68, -63.82], [-66.53, -63.47], [-66.0, -63.25], [-65.47, -63.47], [-65.25, -64.0], [-65.35, -64.25], [-65.25, -64.5], [-65.35, -64.75], [-65.32, -64.82], [-65.25, -64.85], [-65.0, -64.75], [-64.47, -64.97], [-64.32, -65.32], [-64.25, -65.35], [-64.0, -65.25], [-63.75, -65.35], [-63.5, -65.25], [-62.97, -65.47], [-62.75, -66.0], [-62.97, -66.53], [-63.5, -66.75], [-63.75, -66.65], [-64.0, -66.75], [-64.25, -66.65], [-64.5, -66.75], [-65.03, -66.53], [-65.18, -66.18], [-65.25, -66.15], [-65.5, -66.25], [-65.75, -66.15], [-66.0, -66.25], [-66.25, -66.15], [-66.32, -66.18], [-66.47, -66.53], [-66.82, -66.68], [-66.97, -67.03], [-67.5, -67.25], [-67.75, -67.15], [-68.0, -67.25], [-68.25, -67.15], [-68.5, -67.25], [-68.75, -67.15], [-68.82, -67.18], [-68.97, -67.53], [-69.32, -67.68], [-69.47, -68.03], [-70.0, -68.25], [-70.25, -68.15], [-70.5, -68.25], [-70.75, -68.15], [-71.0, -68.25], [-71.25, -68.15], [-71.5, -68.25], [-72.03, -68.03], [-72.18, -67.68], [-72.25, -67.65], [-72.5, -67.75], [-72.75, -67.65], [-73.0, -67.75], [-73.25, -67.65], [-73.5, -67.75], [-73.75, -67.65], [-74.0, -67.75], [-74.53, -67.53], [-74.75, -67.0], [-74.53, -66.47], [-74.18, -66.32], [-74.15, -66.25], [-74.25, -66.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.181284154038138}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.565833628720956}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.8873340979731665, -2.19224161912598, -2.701198881141181, -3.160603239106763]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-16.617914561720738, -16.62908837370111, -19.622673593572443, -18.776595397247235]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5079989953752926, -2.1159937105413906, -2.5609778456008367, -2.92763978682937]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.685359748710255, -6.530396182004097, -9.181284154038138, -7.928457386253541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5939283847010428, -1.5072694600483945, -1.7176825585793398, -1.9773773624675302]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.799394056954337, -1.7335613559912555, -2.6722373378158846, -3.173762169256283]}}