{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:44.381501", "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": "2015-Apr-21_to_2015-Apr-23_269.0_44.5"}, "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": 2015040000802}, "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 21 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2015"}, "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": 55240.99564359512}, "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": ["C.North-America", "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": []}, "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": 44.5}, "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": 269.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 43.0], [-92.03, 43.53], [-91.68, 43.68], [-91.65, 43.75], [-91.75, 44.0], [-91.65, 44.25], [-91.68, 44.32], [-92.03, 44.47], [-92.25, 45.0], [-92.03, 45.53], [-91.68, 45.68], [-91.53, 46.03], [-91.18, 46.18], [-91.03, 46.53], [-90.68, 46.68], [-90.53, 47.03], [-90.0, 47.25], [-89.47, 47.03], [-89.25, 46.5], [-89.46, 46.0], [-89.32, 45.68], [-88.97, 45.53], [-88.75, 45.0], [-88.85, 44.75], [-88.75, 44.5], [-88.85, 44.25], [-88.75, 44.0], [-88.97, 43.47], [-89.32, 43.32], [-89.35, 43.25], [-89.25, 43.0], [-89.47, 42.47], [-90.0, 42.25], [-90.25, 42.35], [-90.32, 42.32], [-90.47, 41.97], [-91.0, 41.75], [-91.53, 41.97], [-91.68, 42.32], [-92.03, 42.47], [-92.25, 43.0]]]]}, "2015-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 43.0], [-92.03, 43.53], [-91.68, 43.68], [-91.65, 43.75], [-91.75, 44.0], [-91.65, 44.25], [-91.68, 44.32], [-92.03, 44.47], [-92.25, 45.0], [-92.03, 45.53], [-91.68, 45.68], [-91.53, 46.03], [-91.18, 46.18], [-91.03, 46.53], [-90.68, 46.68], [-90.53, 47.03], [-90.0, 47.25], [-89.47, 47.03], [-89.25, 46.5], [-89.46, 46.0], [-89.32, 45.68], [-88.97, 45.53], [-88.75, 45.0], [-88.85, 44.75], [-88.75, 44.5], [-88.85, 44.25], [-88.75, 44.0], [-88.97, 43.47], [-89.32, 43.32], [-89.35, 43.25], [-89.25, 43.0], [-89.47, 42.47], [-90.0, 42.25], [-90.25, 42.35], [-90.32, 42.32], [-90.47, 41.97], [-91.0, 41.75], [-91.53, 41.97], [-91.68, 42.32], [-92.03, 42.47], [-92.25, 43.0]]]]}, "2015-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 43.0], [-92.03, 43.53], [-91.68, 43.68], [-91.65, 43.75], [-91.75, 44.0], [-91.65, 44.25], [-91.68, 44.32], [-92.03, 44.47], [-92.25, 45.0], [-92.03, 45.53], [-91.68, 45.68], [-91.53, 46.03], [-91.18, 46.18], [-91.03, 46.53], [-90.68, 46.68], [-90.53, 47.03], [-90.0, 47.25], [-89.47, 47.03], [-89.25, 46.5], [-89.46, 46.0], [-89.32, 45.68], [-88.97, 45.53], [-88.75, 45.0], [-88.85, 44.75], [-88.75, 44.5], [-88.85, 44.25], [-88.75, 44.0], [-88.97, 43.47], [-89.32, 43.32], [-89.35, 43.25], [-89.25, 43.0], [-89.47, 42.47], [-90.0, 42.25], [-90.25, 42.35], [-90.32, 42.32], [-90.47, 41.97], [-91.0, 41.75], [-91.53, 41.97], [-91.68, 42.32], [-92.03, 42.47], [-92.25, 43.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.987831998702404}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.2716810233111655}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.947391822550344, 1.7466326057934225, 3.9769356784899514]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.5657043979682044, -2.860990975536481, -0.4600401170359305]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.084308784433076, -7.4465339767369505, -5.28420030876347]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.038658783168557, -8.987831998702404, -6.637876794778663]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4431702443933778, -1.8892180813510726, -1.3869662496732038]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6627706805513205, -2.1310771704893368, -1.598173928455963]}}