{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:14.690828", "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": "2017-Jun-19_to_2017-Jun-24_298.5_56.0"}, "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": 2017060000589}, "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": "June 19 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 24 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 135804.89343622382}, "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": ["Labrador Sea"]}, "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": 56.0}, "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 294.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.03, 57.53], [-61.5, 57.75], [-60.97, 57.53], [-60.75, 57.0], [-60.87, 56.7], [-60.47, 56.53], [-60.32, 56.18], [-60.25, 56.15], [-60.0, 56.25], [-59.47, 56.03], [-59.25, 55.5], [-59.47, 54.97], [-59.82, 54.82], [-59.97, 54.47], [-60.5, 54.25], [-61.03, 54.47], [-61.18, 54.82], [-61.53, 54.97], [-61.68, 55.32], [-62.03, 55.47], [-62.25, 56.0], [-62.04, 56.5], [-62.25, 57.0], [-62.03, 57.53]]]]}, "2017-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.65, 56.25], [-65.75, 56.5], [-65.53, 57.03], [-65.0, 57.25], [-64.75, 57.15], [-64.68, 57.18], [-64.53, 57.53], [-64.0, 57.75], [-63.75, 57.65], [-63.68, 57.68], [-63.53, 58.03], [-63.0, 58.25], [-62.75, 58.15], [-62.5, 58.25], [-62.25, 58.15], [-62.0, 58.25], [-61.47, 58.03], [-61.32, 57.68], [-60.97, 57.53], [-60.75, 57.0], [-60.85, 56.75], [-60.82, 56.68], [-60.47, 56.53], [-60.32, 56.18], [-60.25, 56.15], [-60.0, 56.25], [-59.47, 56.03], [-59.3, 55.62], [-59.0, 55.75], [-58.47, 55.53], [-58.32, 55.18], [-58.25, 55.15], [-58.0, 55.25], [-57.75, 55.15], [-57.5, 55.25], [-56.97, 55.03], [-56.82, 54.68], [-56.47, 54.53], [-56.32, 54.18], [-56.25, 54.15], [-56.0, 54.25], [-55.47, 54.03], [-55.25, 53.5], [-55.47, 52.97], [-56.0, 52.75], [-56.25, 52.85], [-56.5, 52.75], [-57.03, 52.97], [-57.18, 53.32], [-57.25, 53.35], [-57.5, 53.25], [-57.75, 53.35], [-58.0, 53.25], [-58.53, 53.47], [-58.68, 53.82], [-58.75, 53.85], [-58.82, 53.82], [-58.97, 53.47], [-59.5, 53.25], [-60.03, 53.47], [-60.2, 53.88], [-60.5, 53.75], [-60.75, 53.85], [-61.0, 53.75], [-61.25, 53.85], [-61.5, 53.75], [-61.75, 53.85], [-62.0, 53.75], [-62.25, 53.85], [-62.5, 53.75], [-62.75, 53.85], [-63.0, 53.75], [-63.25, 53.85], [-63.5, 53.75], [-64.03, 53.97], [-64.25, 54.5], [-64.15, 54.75], [-64.18, 54.82], [-64.25, 54.85], [-64.5, 54.75], [-64.75, 54.85], [-65.0, 54.75], [-65.53, 54.97], [-65.75, 55.5], [-65.65, 55.75], [-65.75, 56.0], [-65.65, 56.25]], [[-59.65, 54.75], [-59.7, 54.88], [-59.82, 54.82], [-59.85, 54.75], [-59.8, 54.62], [-59.68, 54.68], [-59.65, 54.75]]]]}, "2017-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.65, 56.25], [-65.75, 56.5], [-65.53, 57.03], [-65.0, 57.25], [-64.75, 57.15], [-64.68, 57.18], [-64.53, 57.53], [-64.0, 57.75], [-63.75, 57.65], [-63.68, 57.68], [-63.53, 58.03], [-63.0, 58.25], [-62.75, 58.15], [-62.5, 58.25], [-62.25, 58.15], [-62.0, 58.25], [-61.47, 58.03], [-61.32, 57.68], [-60.97, 57.53], [-60.75, 57.0], [-60.85, 56.75], [-60.82, 56.68], [-60.47, 56.53], [-60.32, 56.18], [-60.25, 56.15], [-60.0, 56.25], [-59.47, 56.03], [-59.3, 55.62], [-59.0, 55.75], [-58.47, 55.53], [-58.32, 55.18], [-58.25, 55.15], [-58.0, 55.25], [-57.75, 55.15], [-57.5, 55.25], [-56.97, 55.03], [-56.82, 54.68], [-56.47, 54.53], [-56.32, 54.18], [-56.25, 54.15], [-56.0, 54.25], [-55.47, 54.03], [-55.25, 53.5], [-55.47, 52.97], [-56.0, 52.75], [-56.25, 52.85], [-56.5, 52.75], [-57.03, 52.97], [-57.18, 53.32], [-57.25, 53.35], [-57.5, 53.25], [-57.75, 53.35], [-58.0, 53.25], [-58.25, 53.35], [-58.5, 53.25], [-58.75, 53.35], [-59.0, 53.25], [-59.25, 53.35], [-59.32, 53.32], [-59.47, 52.97], [-60.0, 52.75], [-60.25, 52.85], [-60.5, 52.75], [-60.75, 52.85], [-61.0, 52.75], [-61.25, 52.85], [-61.5, 52.75], [-61.75, 52.85], [-62.0, 52.75], [-62.53, 52.97], [-62.68, 53.32], [-63.03, 53.47], [-63.18, 53.82], [-63.25, 53.85], [-63.5, 53.75], [-63.75, 53.85], [-64.0, 53.75], [-64.53, 53.97], [-64.75, 54.5], [-64.62, 54.8], [-64.75, 54.85], [-65.0, 54.75], [-65.53, 54.97], [-65.75, 55.5], [-65.65, 55.75], [-65.75, 56.0], [-65.65, 56.25]], [[-59.65, 54.75], [-59.7, 54.88], [-59.82, 54.82], [-59.85, 54.75], [-59.82, 54.68], [-59.75, 54.65], [-59.68, 54.68], [-59.65, 54.75]]]]}, "2017-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.65, 56.25], [-65.75, 56.5], [-65.53, 57.03], [-65.0, 57.25], [-64.75, 57.15], [-64.68, 57.18], [-64.53, 57.53], [-64.0, 57.75], [-63.75, 57.65], [-63.68, 57.68], [-63.53, 58.03], [-63.0, 58.25], [-62.75, 58.15], [-62.5, 58.25], [-62.25, 58.15], [-62.0, 58.25], [-61.47, 58.03], [-61.32, 57.68], [-60.97, 57.53], [-60.75, 57.0], [-60.85, 56.75], [-60.82, 56.68], [-60.47, 56.53], [-60.32, 56.18], [-60.25, 56.15], [-60.0, 56.25], [-59.47, 56.03], [-59.3, 55.62], [-59.0, 55.75], [-58.47, 55.53], [-58.32, 55.18], [-58.25, 55.15], [-58.0, 55.25], [-57.75, 55.15], [-57.5, 55.25], [-56.97, 55.03], [-56.82, 54.68], [-56.47, 54.53], [-56.32, 54.18], [-56.25, 54.15], [-56.0, 54.25], [-55.47, 54.03], [-55.25, 53.5], [-55.35, 53.25], [-55.25, 53.0], [-55.47, 52.47], [-56.0, 52.25], [-56.53, 52.47], [-56.68, 52.82], [-57.03, 52.97], [-57.18, 53.32], [-57.25, 53.35], [-57.5, 53.25], [-57.75, 53.35], [-58.0, 53.25], [-58.25, 53.35], [-58.5, 53.25], [-58.75, 53.35], [-59.0, 53.25], [-59.25, 53.35], [-59.32, 53.32], [-59.47, 52.97], [-60.0, 52.75], [-60.25, 52.85], [-60.5, 52.75], [-60.75, 52.85], [-61.0, 52.75], [-61.25, 52.85], [-61.5, 52.75], [-61.75, 52.85], [-62.0, 52.75], [-62.53, 52.97], [-62.68, 53.32], [-63.03, 53.47], [-63.18, 53.82], [-63.25, 53.85], [-63.5, 53.75], [-63.75, 53.85], [-64.0, 53.75], [-64.53, 53.97], [-64.75, 54.5], [-64.62, 54.8], [-64.75, 54.85], [-65.0, 54.75], [-65.53, 54.97], [-65.75, 55.5], [-65.65, 55.75], [-65.75, 56.0], [-65.65, 56.25]], [[-59.65, 54.75], [-59.7, 54.88], [-59.82, 54.82], [-59.85, 54.75], [-59.82, 54.68], [-59.75, 54.65], [-59.68, 54.68], [-59.65, 54.75]]]]}, "2017-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.53, 53.97], [-64.75, 54.5], [-64.53, 55.03], [-64.0, 55.25], [-63.75, 55.15], [-63.68, 55.18], [-63.53, 55.53], [-63.12, 55.7], [-63.25, 56.0], [-63.15, 56.25], [-63.25, 56.5], [-63.03, 57.03], [-62.5, 57.25], [-62.25, 57.15], [-62.0, 57.25], [-61.75, 57.15], [-61.5, 57.25], [-60.97, 57.03], [-60.75, 56.5], [-60.85, 56.25], [-60.82, 56.18], [-60.75, 56.15], [-60.5, 56.25], [-60.25, 56.15], [-60.0, 56.25], [-59.47, 56.03], [-59.25, 55.5], [-59.43, 55.07], [-59.0, 55.25], [-58.75, 55.15], [-58.5, 55.25], [-58.25, 55.15], [-58.0, 55.25], [-57.75, 55.15], [-57.5, 55.25], [-56.97, 55.03], [-56.82, 54.68], [-56.47, 54.53], [-56.25, 54.0], [-56.43, 53.57], [-56.0, 53.75], [-55.47, 53.53], [-55.25, 53.0], [-55.47, 52.47], [-56.0, 52.25], [-56.53, 52.47], [-56.75, 53.0], [-56.57, 53.43], [-57.0, 53.25], [-57.25, 53.35], [-57.5, 53.25], [-57.75, 53.35], [-58.0, 53.25], [-58.25, 53.35], [-58.5, 53.25], [-58.75, 53.35], [-59.0, 53.25], [-59.25, 53.35], [-59.32, 53.32], [-59.47, 52.97], [-60.0, 52.75], [-60.25, 52.85], [-60.5, 52.75], [-60.75, 52.85], [-61.0, 52.75], [-61.25, 52.85], [-61.5, 52.75], [-61.75, 52.85], [-62.0, 52.75], [-62.53, 52.97], [-62.68, 53.32], [-63.03, 53.47], [-63.18, 53.82], [-63.25, 53.85], [-63.5, 53.75], [-63.75, 53.85], [-64.0, 53.75], [-64.53, 53.97]], [[-60.25, 54.85], [-60.32, 54.82], [-60.35, 54.75], [-60.32, 54.68], [-60.25, 54.65], [-60.0, 54.75], [-60.25, 54.85]], [[-59.75, 54.65], [-59.68, 54.68], [-59.57, 54.93], [-60.0, 54.75], [-59.75, 54.65]]]]}, "2017-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.53, 52.47], [-56.75, 53.0], [-56.53, 53.53], [-56.0, 53.75], [-55.47, 53.53], [-55.25, 53.0], [-55.47, 52.47], [-56.0, 52.25], [-56.53, 52.47]]], [[[-62.53, 55.97], [-62.75, 56.5], [-62.53, 57.03], [-62.0, 57.25], [-61.47, 57.03], [-61.25, 56.5], [-61.47, 55.97], [-62.0, 55.75], [-62.53, 55.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.873158174437151}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.35378968647282}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.456946975670519, 2.0943901602082065, 2.8994851556192316, 3.264929696921797, 4.528330465998238, 4.474385243710742]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.5543333927180925, 0.09774742456318108, 0.5839098117078834, 0.5491239098278697, 0.8364857079671992, 4.338602592894006]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.356402602215691, -6.637293820370148, -6.531323465931065, -6.354269276290631, -5.912961360527527, -4.209905836924918]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.734867600707901, -8.873158174437151, -8.451330330506266, -7.640048330074137, -7.1399534915234995, -4.8083516017183]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3470931110844389, -1.6237371932769666, -1.5570528528992524, -1.48961364017515, -1.3937020694763502, -1.15282571983431]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4455894228941857, -2.0882186343996105, -1.9393555734676762, -1.8727816698857045, -1.7639313879346488, -1.1754374596475827]}}