{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:31:58.889551", "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": "2022-Aug-10_to_2022-Aug-13_267.0_27.5"}, "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": 2022080000494}, "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": "August 10 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 2022"}, "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": 133457.8127807623}, "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", "N.Central-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": ["Gulf of Mexico"]}, "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": 27.5}, "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": 267.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "267.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.75, 27.5], [-93.53, 28.03], [-93.0, 28.25], [-92.75, 28.15], [-92.68, 28.18], [-92.53, 28.53], [-92.18, 28.68], [-92.15, 28.75], [-92.25, 29.0], [-92.15, 29.25], [-92.25, 29.5], [-92.03, 30.03], [-91.5, 30.25], [-90.97, 30.03], [-90.82, 29.68], [-90.75, 29.65], [-90.68, 29.68], [-90.53, 30.03], [-90.18, 30.18], [-90.03, 30.53], [-89.5, 30.75], [-89.25, 30.65], [-89.0, 30.75], [-88.47, 30.53], [-88.25, 30.0], [-88.35, 29.75], [-88.25, 29.5], [-88.35, 29.25], [-88.25, 29.0], [-88.47, 28.47], [-88.82, 28.32], [-88.85, 28.25], [-88.75, 28.0], [-88.97, 27.47], [-89.5, 27.25], [-89.75, 27.35], [-90.0, 27.25], [-90.25, 27.35], [-90.5, 27.25], [-90.75, 27.35], [-91.0, 27.25], [-91.25, 27.35], [-91.32, 27.32], [-91.47, 26.97], [-91.82, 26.82], [-91.85, 26.75], [-91.75, 26.5], [-91.97, 25.97], [-92.5, 25.75], [-93.03, 25.97], [-93.25, 26.5], [-93.15, 26.75], [-93.18, 26.82], [-93.53, 26.97], [-93.75, 27.5]]]]}, "2022-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.75, 28.0], [-94.53, 28.53], [-94.0, 28.75], [-93.75, 28.65], [-93.68, 28.68], [-93.65, 28.75], [-93.68, 28.82], [-94.03, 28.97], [-94.25, 29.5], [-94.03, 30.03], [-93.5, 30.25], [-93.25, 30.15], [-93.0, 30.25], [-92.47, 30.03], [-92.32, 29.68], [-92.25, 29.65], [-92.18, 29.68], [-92.03, 30.03], [-91.5, 30.25], [-90.97, 30.03], [-90.82, 29.68], [-90.75, 29.65], [-90.68, 29.68], [-90.53, 30.03], [-90.18, 30.18], [-90.03, 30.53], [-89.5, 30.75], [-89.25, 30.65], [-89.0, 30.75], [-88.47, 30.53], [-88.25, 30.0], [-88.35, 29.75], [-88.25, 29.5], [-88.35, 29.25], [-88.25, 29.0], [-88.47, 28.47], [-88.82, 28.32], [-88.85, 28.25], [-88.75, 28.0], [-88.97, 27.47], [-89.5, 27.25], [-89.75, 27.35], [-90.0, 27.25], [-90.25, 27.35], [-90.5, 27.25], [-90.75, 27.35], [-91.0, 27.25], [-91.25, 27.35], [-91.32, 27.32], [-91.35, 27.25], [-91.25, 27.0], [-91.35, 26.75], [-91.25, 26.5], [-91.47, 25.97], [-91.82, 25.82], [-91.97, 25.47], [-92.5, 25.25], [-92.75, 25.35], [-93.0, 25.25], [-93.53, 25.47], [-93.68, 25.82], [-94.03, 25.97], [-94.25, 26.5], [-94.15, 26.75], [-94.25, 27.0], [-94.15, 27.25], [-94.18, 27.32], [-94.53, 27.47], [-94.75, 28.0]]]]}, "2022-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.75, 28.0], [-94.53, 28.53], [-94.0, 28.75], [-93.75, 28.65], [-93.68, 28.68], [-93.65, 28.75], [-93.68, 28.82], [-94.03, 28.97], [-94.25, 29.5], [-94.03, 30.03], [-93.5, 30.25], [-93.25, 30.15], [-93.0, 30.25], [-92.47, 30.03], [-92.32, 29.68], [-92.25, 29.65], [-92.18, 29.68], [-92.03, 30.03], [-91.5, 30.25], [-90.97, 30.03], [-90.82, 29.68], [-90.75, 29.65], [-90.68, 29.68], [-90.53, 30.03], [-90.18, 30.18], [-90.03, 30.53], [-89.5, 30.75], [-89.25, 30.65], [-89.0, 30.75], [-88.47, 30.53], [-88.25, 30.0], [-88.35, 29.75], [-88.25, 29.5], [-88.35, 29.25], [-88.25, 29.0], [-88.47, 28.47], [-88.82, 28.32], [-88.85, 28.25], [-88.75, 28.0], [-88.97, 27.47], [-89.5, 27.25], [-89.75, 27.35], [-90.0, 27.25], [-90.25, 27.35], [-90.5, 27.25], [-90.75, 27.35], [-91.0, 27.25], [-91.25, 27.35], [-91.32, 27.32], [-91.35, 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25.47], [-93.68, 25.82], [-94.03, 25.97], [-94.25, 26.5], [-94.15, 26.75], [-94.25, 27.0], [-94.15, 27.25], [-94.18, 27.32], [-94.53, 27.47], [-94.75, 28.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3915978092587125}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6647682644854287}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.91781331537004, 26.695868390876853, 26.466771371989353, 26.7992091066414]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.50457116196685, 26.0288137747134, 25.825537895092168, 26.431608895523595]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.346100927182255, 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