{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:35.147403", "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": "2024-Apr-21_to_2024-Apr-23_267.5_31.0"}, "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": 2024040000409}, "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 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2024"}, "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": 99414.63030174939}, "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": 31.0}, "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": 267.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "267.5\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": 273.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.68, 31.18], [-93.53, 31.53], [-93.18, 31.68], [-93.03, 32.03], [-92.68, 32.18], [-92.65, 32.25], [-92.75, 32.5], [-92.53, 33.03], [-92.18, 33.18], [-92.03, 33.53], [-91.5, 33.75], [-91.25, 33.65], [-91.0, 33.75], [-90.75, 33.65], [-90.68, 33.68], [-90.53, 34.03], [-90.0, 34.25], [-89.5, 34.04], [-89.0, 34.25], [-88.47, 34.03], [-88.32, 33.68], [-88.0, 33.54], [-87.5, 33.75], [-87.25, 33.65], [-87.0, 33.75], [-86.75, 33.65], [-86.5, 33.75], [-85.97, 33.53], [-85.75, 33.0], [-85.97, 32.47], [-86.32, 32.32], [-86.47, 31.97], [-87.0, 31.75], [-87.25, 31.85], [-87.32, 31.82], [-87.47, 31.47], [-88.0, 31.25], [-88.25, 31.35], [-88.5, 31.25], [-88.75, 31.35], [-89.0, 31.25], [-89.25, 31.35], [-89.5, 31.25], [-90.0, 31.46], [-90.5, 31.25], [-90.75, 31.35], [-90.82, 31.32], [-90.97, 30.97], [-91.32, 30.82], [-91.47, 30.47], [-91.82, 30.32], [-91.97, 29.97], [-92.5, 29.75], [-92.75, 29.85], [-93.0, 29.75], [-93.25, 29.85], [-93.32, 29.82], [-93.47, 29.47], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.68, 31.18]]]]}, "2024-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.68, 31.18], [-93.53, 31.53], [-93.18, 31.68], [-93.03, 32.03], [-92.68, 32.18], [-92.65, 32.25], [-92.75, 32.5], [-92.53, 33.03], [-92.18, 33.18], [-92.03, 33.53], [-91.5, 33.75], [-91.25, 33.65], [-91.0, 33.75], [-90.75, 33.65], [-90.68, 33.68], [-90.53, 34.03], [-90.0, 34.25], [-89.5, 34.04], [-89.0, 34.25], [-88.47, 34.03], [-88.32, 33.68], [-88.0, 33.54], [-87.5, 33.75], [-87.25, 33.65], [-87.0, 33.75], [-86.75, 33.65], [-86.5, 33.75], [-85.97, 33.53], [-85.75, 33.0], [-85.97, 32.47], [-86.32, 32.32], [-86.47, 31.97], [-87.0, 31.75], [-87.25, 31.85], [-87.32, 31.82], [-87.47, 31.47], [-88.0, 31.25], [-88.25, 31.35], [-88.5, 31.25], [-88.75, 31.35], [-89.0, 31.25], [-89.25, 31.35], [-89.5, 31.25], [-90.0, 31.46], [-90.5, 31.25], [-90.75, 31.35], [-90.82, 31.32], [-90.97, 30.97], [-91.32, 30.82], [-91.47, 30.47], [-91.82, 30.32], [-91.97, 29.97], [-92.5, 29.75], [-92.75, 29.85], [-93.0, 29.75], [-93.25, 29.85], [-93.32, 29.82], [-93.47, 29.47], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.68, 31.18]]]]}, "2024-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.68, 31.18], [-93.53, 31.53], [-93.18, 31.68], [-93.03, 32.03], [-92.68, 32.18], [-92.65, 32.25], [-92.75, 32.5], [-92.53, 33.03], [-92.18, 33.18], [-92.03, 33.53], [-91.5, 33.75], [-91.25, 33.65], [-91.0, 33.75], [-90.75, 33.65], [-90.68, 33.68], [-90.53, 34.03], [-90.0, 34.25], [-89.5, 34.04], [-89.0, 34.25], [-88.47, 34.03], [-88.32, 33.68], [-88.0, 33.54], [-87.5, 33.75], [-87.25, 33.65], [-87.0, 33.75], [-86.75, 33.65], [-86.5, 33.75], [-85.97, 33.53], [-85.75, 33.0], [-85.97, 32.47], [-86.32, 32.32], [-86.47, 31.97], [-87.0, 31.75], [-87.25, 31.85], [-87.32, 31.82], [-87.47, 31.47], [-88.0, 31.25], [-88.25, 31.35], [-88.5, 31.25], [-88.75, 31.35], [-89.0, 31.25], [-89.25, 31.35], [-89.5, 31.25], [-90.0, 31.46], [-90.5, 31.25], [-90.75, 31.35], [-90.82, 31.32], [-90.97, 30.97], [-91.32, 30.82], [-91.47, 30.47], [-91.82, 30.32], [-91.97, 29.97], [-92.5, 29.75], [-92.75, 29.85], [-93.0, 29.75], [-93.25, 29.85], [-93.32, 29.82], [-93.47, 29.47], [-94.0, 29.25], [-94.53, 29.47], [-94.75, 30.0], [-94.53, 30.53], [-94.18, 30.68], [-94.03, 31.03], [-93.68, 31.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.998823003802045}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.517552191958966}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.997061424570063, 13.45837811452293, 14.94157927279332]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.803651400165279, 11.749381494521401, 13.2446242449534]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.465055835583458, -6.193565079716879, -4.894035660576556]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.235960752559038, -6.998823003802045, -5.648741995767182]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6217086418354227, -1.9087346642820222, -1.5550319273165993]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9619232852387323, -2.0614047681594463, -1.7944803951583046]}}