{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:25.368340", "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-Feb-12_to_2022-Feb-15_270.5_48.5"}, "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": 2022020000599}, "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": "February 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 15 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": 50655.67306864051}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 48.5}, "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": 270.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 266.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 49.03], [-93.5, 49.25], [-93.25, 49.15], [-93.18, 49.18], [-93.15, 49.25], [-93.18, 49.32], [-93.53, 49.47], [-93.75, 50.0], [-93.53, 50.53], [-93.0, 50.75], [-92.47, 50.53], [-92.32, 50.18], [-92.25, 50.15], [-92.0, 50.25], [-91.75, 50.15], [-91.5, 50.25], [-91.25, 50.15], [-91.0, 50.25], [-90.75, 50.15], [-90.68, 50.18], [-90.53, 50.53], [-90.0, 50.75], [-89.47, 50.53], [-89.32, 50.18], [-88.97, 50.03], [-88.75, 49.5], [-88.85, 49.25], [-88.75, 49.0], [-88.85, 48.75], [-88.75, 48.5], [-88.97, 47.97], [-89.5, 47.75], [-89.75, 47.85], [-90.0, 47.75], [-90.25, 47.85], [-90.5, 47.75], [-90.75, 47.85], [-91.0, 47.75], [-91.25, 47.85], [-91.5, 47.75], [-91.75, 47.85], [-92.0, 47.75], [-92.25, 47.85], [-92.5, 47.75], [-92.75, 47.85], [-93.0, 47.75], [-93.25, 47.85], [-93.5, 47.75], [-94.03, 47.97], [-94.25, 48.5], [-94.03, 49.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "C.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 47.75], [-94.02999999999997, 47.97], [-94.25, 48.5], [-94.02999999999997, 49.03], [-93.5, 49.25], [-93.25, 49.15], [-93.18, 49.18], [-93.14999999999998, 49.25], [-93.18, 49.32], [-93.52999999999997, 49.47], [-93.75, 50.0], [-93.52999999999997, 50.53], [-93.0, 50.75], [-92.47000000000003, 50.53], [-92.32, 50.18], [-92.25, 50.15], [-92.0, 50.25], [-91.75, 50.15], [-91.5, 50.25], [-91.25, 50.15], [-91.0, 50.25], [-90.75, 50.15], [-90.68, 50.18], [-90.52999999999997, 50.53], [-90.0, 50.75], [-89.47000000000003, 50.53], [-89.32, 50.18], [-88.97000000000003, 50.03], [-88.75, 49.5], [-88.85000000000002, 49.25], [-88.75, 49.0], [-88.85000000000002, 48.75], [-88.75, 48.5], [-88.97000000000003, 47.97], [-89.5, 47.75], [-89.75, 47.85], [-90.0, 47.75], [-90.25, 47.85], [-90.5, 47.75], [-90.75, 47.85], [-91.0, 47.75], [-91.25, 47.85], [-91.5, 47.75], [-91.75, 47.85], [-92.0, 47.75], [-92.25, 47.85], [-92.5, 47.75], [-92.75, 47.85], [-93.0, 47.75], [-93.25, 47.85], [-93.5, 47.75]]]]}, "2022-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 47.75], [-94.02999999999997, 47.97], [-94.25, 48.5], [-94.02999999999997, 49.03], [-93.5, 49.25], [-93.25, 49.15], [-93.18, 49.18], [-93.14999999999998, 49.25], [-93.18, 49.32], [-93.52999999999997, 49.47], [-93.75, 50.0], [-93.52999999999997, 50.53], [-93.0, 50.75], [-92.47000000000003, 50.53], [-92.32, 50.18], [-92.25, 50.15], [-92.0, 50.25], [-91.75, 50.15], [-91.5, 50.25], [-91.25, 50.15], [-91.0, 50.25], [-90.75, 50.15], [-90.68, 50.18], [-90.52999999999997, 50.53], [-90.0, 50.75], [-89.47000000000003, 50.53], [-89.32, 50.18], [-88.97000000000003, 50.03], [-88.75, 49.5], [-88.85000000000002, 49.25], [-88.75, 49.0], [-88.85000000000002, 48.75], [-88.75, 48.5], [-88.97000000000003, 47.97], [-89.5, 47.75], [-89.75, 47.85], [-90.0, 47.75], [-90.25, 47.85], [-90.5, 47.75], [-90.75, 47.85], [-91.0, 47.75], [-91.25, 47.85], [-91.5, 47.75], [-91.75, 47.85], [-92.0, 47.75], [-92.25, 47.85], [-92.5, 47.75], [-92.75, 47.85], [-93.0, 47.75], [-93.25, 47.85], [-93.5, 47.75]]]]}, "2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.5, 47.75], [-94.02999999999997, 47.97], [-94.25, 48.5], [-94.02999999999997, 49.03], [-93.5, 49.25], [-93.25, 49.15], [-93.18, 49.18], [-93.14999999999998, 49.25], [-93.18, 49.32], [-93.52999999999997, 49.47], [-93.75, 50.0], [-93.52999999999997, 50.53], [-93.0, 50.75], [-92.47000000000003, 50.53], [-92.32, 50.18], [-92.25, 50.15], [-92.0, 50.25], [-91.75, 50.15], [-91.5, 50.25], [-91.25, 50.15], [-91.0, 50.25], [-90.75, 50.15], [-90.68, 50.18], [-90.52999999999997, 50.53], [-90.0, 50.75], [-89.47000000000003, 50.53], [-89.32, 50.18], [-88.97000000000003, 50.03], [-88.75, 49.5], [-88.85000000000002, 49.25], [-88.75, 49.0], [-88.85000000000002, 48.75], [-88.75, 48.5], [-88.97000000000003, 47.97], [-89.5, 47.75], [-89.75, 47.85], 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"value": -15.275786771720334}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.58548983207083}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.957189433761414, -27.387356279665482, -22.521471382187144, -22.82422166622672]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.258235730229302, -29.512051493820877, -23.79614017818892, -23.81507484692898]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-13.159268818409737, -13.536029974176177, -9.004490588420422, -9.227190120086263]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.808105579544218, -15.275786771720334, -9.560647553579827, -9.725614437710021]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9519807868407488, -2.0197712315974976, -1.3445253493855933, -1.361835752490481]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.060639487312708, -2.295695023352317, -1.3895708871724457, -1.4740159618487467]}}