{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:55.946332", "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-Jan-21_to_2022-Jan-23_267.0_29.5"}, "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": 2022010000820}, "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": "January 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 2022"}, "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": 225474.62775486195}, "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": 29.5}, "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": 265.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 272.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 29.03], [-94.68, 29.18], [-94.65, 29.25], [-94.75, 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26.75], [-93.25, 26.85], [-93.32, 26.82], [-93.47, 26.47], [-94.0, 26.25], [-94.53, 26.47], [-94.75, 27.0], [-94.65, 27.25], [-94.68, 27.32], [-95.03, 27.47], [-95.25, 28.0], [-95.15, 28.25], [-95.25, 28.5], [-95.03, 29.03]]]]}, "2022-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 29.03], [-94.68, 29.18], [-94.65, 29.25], [-94.75, 29.5], [-94.53, 30.03], [-94.18, 30.18], [-94.15, 30.25], [-94.25, 30.5], [-94.03, 31.03], [-93.5, 31.25], [-93.25, 31.15], [-93.0, 31.25], [-92.75, 31.15], [-92.68, 31.18], [-92.53, 31.53], [-92.18, 31.68], [-92.03, 32.03], [-91.5, 32.25], [-91.25, 32.15], [-91.18, 32.18], [-91.03, 32.53], [-90.5, 32.75], [-89.97, 32.53], [-89.82, 32.18], [-89.75, 32.15], [-89.5, 32.25], [-89.25, 32.15], [-89.0, 32.25], [-88.75, 32.15], [-88.5, 32.25], [-88.25, 32.15], [-88.0, 32.25], [-87.47, 32.03], [-87.25, 31.5], [-87.35, 31.25], [-87.25, 31.0], [-87.35, 30.75], [-87.32, 30.68], [-86.97, 30.53], [-86.75, 30.0], [-86.97, 29.47], [-87.5, 29.25], [-87.75, 29.35], [-88.0, 29.25], [-88.25, 29.35], [-88.32, 29.32], [-88.47, 28.97], [-88.82, 28.82], [-88.97, 28.47], [-89.5, 28.25], [-89.75, 28.35], [-89.82, 28.32], [-89.97, 27.97], [-90.5, 27.75], [-90.75, 27.85], [-90.82, 27.82], [-90.97, 27.47], [-91.5, 27.25], [-91.75, 27.35], [-92.0, 27.25], [-92.25, 27.35], [-92.32, 27.32], [-92.47, 26.97], [-93.0, 26.75], [-93.25, 26.85], [-93.32, 26.82], [-93.47, 26.47], [-94.0, 26.25], [-94.53, 26.47], [-94.75, 27.0], [-94.65, 27.25], [-94.68, 27.32], [-95.03, 27.47], [-95.25, 28.0], [-95.15, 28.25], [-95.25, 28.5], [-95.03, 29.03]]]]}, "2022-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 29.03], [-94.68, 29.18], [-94.65, 29.25], [-94.75, 29.5], [-94.53, 30.03], [-94.18, 30.18], [-94.15, 30.25], [-94.25, 30.5], [-94.03, 31.03], [-93.5, 31.25], [-93.25, 31.15], [-93.0, 31.25], [-92.75, 31.15], [-92.68, 31.18], [-92.53, 31.53], [-92.18, 31.68], [-92.03, 32.03], [-91.5, 32.25], [-91.25, 32.15], [-91.18, 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.96359792610997}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.314890664744516}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.666534796462827, 5.573026242647813, 6.34772958258543]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.9579175968063396, -0.9724862098077551, 1.1405725243151323]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.443989985882692, -7.623922497249827, -6.876759511101026]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.73853981991897, -9.96359792610997, -8.760389847401541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.831429058281421, -1.8639363657396246, -1.6702312126210768]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3016657060318777, -2.382397976012738, -2.0528803200903316]}}