{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:59.250543", "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": "2013-Apr-02_to_2013-Apr-04_282.5_39.5"}, "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": 2013040000169}, "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": "April 02 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2013"}, "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": 124471.70962408594}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["North Atlantic 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": 39.5}, "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": 282.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 278.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 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36.85], [-79.5, 36.75], [-79.75, 36.85], [-80.0, 36.75], [-80.25, 36.85], [-80.5, 36.75], [-80.75, 36.85], [-81.0, 36.75], [-81.53, 36.97], [-81.75, 37.5], [-81.53, 38.03], [-81.18, 38.18], [-81.03, 38.53], [-80.5, 38.75]]]]}, "2013-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 39.03], [-79.68, 39.18], [-79.65, 39.25], [-79.75, 39.5], [-79.65, 39.75], [-79.75, 40.0], [-79.53, 40.53], [-79.18, 40.68], [-79.15, 40.75], [-79.25, 41.0], [-79.03, 41.53], [-78.5, 41.75], [-77.97, 41.53], [-77.82, 41.18], [-77.75, 41.15], [-77.5, 41.25], [-77.25, 41.15], [-77.0, 41.25], [-76.75, 41.15], [-76.5, 41.25], [-75.97, 41.03], [-75.82, 40.68], [-75.75, 40.65], [-75.5, 40.75], [-75.25, 40.65], [-75.18, 40.68], [-75.03, 41.03], [-74.5, 41.25], [-74.25, 41.15], [-74.0, 41.25], [-73.47, 41.03], [-73.25, 40.5], [-73.35, 40.25], [-73.25, 40.0], [-73.47, 39.47], [-73.82, 39.32], [-73.97, 38.97], [-74.5, 38.75], [-74.75, 38.85], [-74.82, 38.82], [-74.97, 38.47], [-75.5, 38.25], [-75.75, 38.35], [-75.82, 38.32], [-75.97, 37.97], [-76.5, 37.75], [-77.03, 37.97], [-77.18, 38.32], [-77.25, 38.35], [-77.5, 38.25], [-77.75, 38.35], [-77.82, 38.32], [-77.85, 38.25], [-77.75, 38.0], [-77.85, 37.75], [-77.75, 37.5], [-77.97, 36.97], [-78.5, 36.75], [-78.75, 36.85], [-79.0, 36.75], [-79.25, 36.85], [-79.5, 36.75], [-79.75, 36.85], [-80.0, 36.75], [-80.25, 36.85], [-80.5, 36.75], [-80.75, 36.85], [-81.0, 36.75], [-81.53, 36.97], [-81.75, 37.5], [-81.53, 38.03], [-81.18, 38.18], [-81.03, 38.53], [-80.5, 38.75]]]]}, "2013-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 39.03], [-79.68, 39.18], [-79.65, 39.25], [-79.75, 39.5], [-79.65, 39.75], [-79.75, 40.0], [-79.53, 40.53], [-79.18, 40.68], [-79.15, 40.75], [-79.25, 41.0], [-79.03, 41.53], [-78.5, 41.75], [-77.97, 41.53], [-77.82, 41.18], [-77.75, 41.15], [-77.5, 41.25], [-77.25, 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.377790681492456}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.314147484435991}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.4724627513389237, 3.2570420905158812, 2.6747625908777763]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.26228666308009, -0.9221137188454236, -0.3050665129480308]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.882416704957732, -6.117420046472999, -6.94260570187724]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.595523345763752, -7.317291985896588, -8.377790681492456]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4077928770644321, -1.4451361016624036, -1.576507405068135]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5919341469888124, -1.5685043258809557, -1.878559598884034]}}