{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:50.763594", "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": "2012-Nov-28_to_2012-Nov-30_271.5_52.5"}, "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": 2012110001061}, "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": "November 28 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 30 2012"}, "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": 102864.01342342819}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": 52.5}, "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": 271.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 267.75}, "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": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 53.75], [-92.75, 54.0], [-92.65, 54.25], [-92.75, 54.5], [-92.53, 55.03], [-92.0, 55.25], [-91.47, 55.03], [-91.32, 54.68], [-91.25, 54.65], [-91.0, 54.75], [-90.75, 54.65], [-90.5, 54.75], [-90.25, 54.65], [-90.0, 54.75], [-89.47, 54.53], [-89.32, 54.18], [-89.25, 54.15], [-89.0, 54.25], [-88.75, 54.15], [-88.5, 54.25], [-88.25, 54.15], [-88.0, 54.25], [-87.75, 54.15], [-87.5, 54.25], [-87.25, 54.15], [-87.0, 54.25], [-86.47, 54.03], [-86.25, 53.5], [-86.37, 53.2], [-85.97, 53.03], [-85.75, 52.5], [-85.85, 52.25], [-85.75, 52.0], [-85.97, 51.47], [-86.5, 51.25], [-86.75, 51.35], [-87.0, 51.25], [-87.25, 51.35], [-87.5, 51.25], [-87.75, 51.35], [-88.0, 51.25], [-88.25, 51.35], [-88.5, 51.25], [-88.75, 51.35], [-88.82, 51.32], [-88.97, 50.97], [-89.5, 50.75], [-89.75, 50.85], [-90.0, 50.75], [-90.25, 50.85], [-90.5, 50.75], [-90.75, 50.85], [-91.0, 50.75], [-91.25, 50.85], [-91.5, 50.75], [-92.03, 50.97], [-92.18, 51.32], [-92.53, 51.47], [-92.75, 52.0], [-92.54, 52.5], [-92.75, 53.0], [-92.65, 53.25], [-92.75, 53.5], [-92.65, 53.75]]]]}, "2012-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 53.75], [-92.75, 54.0], [-92.65, 54.25], [-92.75, 54.5], [-92.53, 55.03], [-92.0, 55.25], [-91.47, 55.03], [-91.32, 54.68], [-91.25, 54.65], [-91.0, 54.75], [-90.75, 54.65], [-90.5, 54.75], [-90.25, 54.65], [-90.0, 54.75], [-89.47, 54.53], [-89.32, 54.18], [-89.25, 54.15], [-89.0, 54.25], [-88.75, 54.15], [-88.5, 54.25], [-88.25, 54.15], [-88.0, 54.25], [-87.75, 54.15], [-87.5, 54.25], [-87.25, 54.15], [-87.0, 54.25], [-86.47, 54.03], [-86.25, 53.5], [-86.37, 53.2], [-85.97, 53.03], [-85.75, 52.5], [-85.85, 52.25], [-85.75, 52.0], [-85.97, 51.47], [-86.5, 51.25], [-86.75, 51.35], [-87.0, 51.25], [-87.25, 51.35], [-87.5, 51.25], [-87.75, 51.35], [-88.0, 51.25], [-88.25, 51.35], [-88.5, 51.25], [-88.75, 51.35], [-88.82, 51.32], [-88.97, 50.97], [-89.5, 50.75], [-89.75, 50.85], [-90.0, 50.75], [-90.25, 50.85], [-90.5, 50.75], [-90.75, 50.85], [-91.0, 50.75], [-91.25, 50.85], [-91.5, 50.75], [-92.03, 50.97], [-92.18, 51.32], [-92.53, 51.47], [-92.75, 52.0], [-92.54, 52.5], [-92.75, 53.0], [-92.65, 53.25], [-92.75, 53.5], [-92.65, 53.75]]]]}, "2012-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 53.75], [-92.75, 54.0], [-92.65, 54.25], [-92.75, 54.5], [-92.53, 55.03], [-92.0, 55.25], [-91.47, 55.03], [-91.32, 54.68], [-91.25, 54.65], [-91.0, 54.75], [-90.75, 54.65], [-90.5, 54.75], [-90.25, 54.65], [-90.0, 54.75], [-89.47, 54.53], [-89.32, 54.18], [-89.25, 54.15], [-89.0, 54.25], [-88.75, 54.15], [-88.5, 54.25], [-88.25, 54.15], [-88.0, 54.25], [-87.75, 54.15], [-87.5, 54.25], [-87.25, 54.15], [-87.0, 54.25], [-86.47, 54.03], [-86.25, 53.5], [-86.37, 53.2], [-85.97, 53.03], [-85.75, 52.5], [-85.85, 52.25], [-85.75, 52.0], [-85.97, 51.47], [-86.5, 51.25], [-86.75, 51.35], [-87.0, 51.25], [-87.25, 51.35], [-87.5, 51.25], [-87.75, 51.35], [-88.0, 51.25], [-88.25, 51.35], [-88.5, 51.25], [-88.75, 51.35], [-88.82, 51.32], [-88.97, 50.97], [-89.5, 50.75], [-89.75, 50.85], [-90.0, 50.75], [-90.25, 50.85], [-90.5, 50.75], [-90.75, 50.85], [-91.0, 50.75], [-91.25, 50.85], [-91.5, 50.75], [-92.03, 50.97], [-92.18, 51.32], [-92.53, 51.47], [-92.75, 52.0], [-92.54, 52.5], [-92.75, 53.0], [-92.65, 53.25], [-92.75, 53.5], [-92.65, 53.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.915000666092965}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.12590946549736}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.125941231324845, -22.525053439791435, -24.199132506415964]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.662753934159156, -23.88114617043243, -26.651883204347996]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.708279249650689, -11.065614315803813, -12.603834831037581]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.456216485491723, -11.699377684780643, -14.915000666092965]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5840374495323202, -1.7900817403708689, -1.9928310512347356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.679821624998778, -1.9160052113527182, -2.3163422830932157]}}