{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:47.740696", "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-May-01_to_2017-May-03_293.0_63.0"}, "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": 2017050000128}, "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": "May 01 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2017"}, "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": 66729.41572904612}, "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": ["Davis Strait", "Hudson Strait"]}, "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": 63.0}, "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": 293.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "293.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 291.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 297.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.03, 64.03], [-68.5, 64.25], [-68.25, 64.15], [-68.18, 64.18], [-68.15, 64.25], [-68.25, 64.5], [-68.15, 64.75], [-68.25, 65.0], [-68.15, 65.25], [-68.25, 65.5], [-68.03, 66.03], [-67.5, 66.25], [-67.25, 66.15], [-67.0, 66.25], [-66.75, 66.15], [-66.5, 66.25], [-65.97, 66.03], [-65.82, 65.68], [-65.47, 65.53], [-65.32, 65.18], [-65.25, 65.15], [-65.0, 65.25], [-64.75, 65.15], [-64.5, 65.25], [-64.25, 65.15], [-64.0, 65.25], [-63.47, 65.03], [-63.32, 64.68], [-63.25, 64.65], [-63.0, 64.75], [-62.75, 64.65], [-62.5, 64.75], [-61.97, 64.53], [-61.75, 64.0], [-61.97, 63.47], [-62.32, 63.32], [-62.47, 62.97], [-63.0, 62.75], [-63.25, 62.85], [-63.5, 62.75], [-63.75, 62.85], [-64.0, 62.75], [-64.25, 62.85], [-64.5, 62.75], [-64.75, 62.85], [-64.82, 62.82], [-64.97, 62.47], [-65.32, 62.32], [-65.47, 61.97], [-66.0, 61.75], [-66.25, 61.85], [-66.32, 61.82], [-66.47, 61.47], [-67.0, 61.25], [-67.53, 61.47], [-67.75, 62.0], [-67.65, 62.25], [-67.68, 62.32], [-67.75, 62.35], [-68.0, 62.25], [-68.25, 62.35], [-68.5, 62.25], [-69.03, 62.47], [-69.25, 63.0], [-69.15, 63.25], [-69.25, 63.5], [-69.03, 64.03]]]]}, "2017-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.03, 64.03], [-68.5, 64.25], [-68.25, 64.15], [-68.18, 64.18], [-68.15, 64.25], [-68.25, 64.5], [-68.15, 64.75], [-68.25, 65.0], [-68.15, 65.25], [-68.25, 65.5], [-68.03, 66.03], [-67.5, 66.25], [-67.25, 66.15], [-67.0, 66.25], [-66.75, 66.15], [-66.5, 66.25], [-65.97, 66.03], [-65.82, 65.68], [-65.47, 65.53], [-65.32, 65.18], [-65.25, 65.15], [-65.0, 65.25], [-64.75, 65.15], [-64.5, 65.25], [-64.25, 65.15], [-64.0, 65.25], [-63.47, 65.03], [-63.32, 64.68], [-63.25, 64.65], [-63.0, 64.75], [-62.75, 64.65], [-62.5, 64.75], [-61.97, 64.53], [-61.75, 64.0], [-61.97, 63.47], [-62.32, 63.32], [-62.47, 62.97], [-63.0, 62.75], [-63.25, 62.85], [-63.5, 62.75], [-63.75, 62.85], [-64.0, 62.75], [-64.25, 62.85], [-64.5, 62.75], [-64.75, 62.85], [-64.82, 62.82], [-64.97, 62.47], [-65.32, 62.32], [-65.47, 61.97], [-66.0, 61.75], [-66.25, 61.85], [-66.32, 61.82], [-66.47, 61.47], [-67.0, 61.25], [-67.53, 61.47], [-67.75, 62.0], [-67.65, 62.25], [-67.68, 62.32], [-67.75, 62.35], [-68.0, 62.25], [-68.25, 62.35], [-68.5, 62.25], [-69.03, 62.47], [-69.25, 63.0], [-69.15, 63.25], [-69.25, 63.5], [-69.03, 64.03]]]]}, "2017-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.03, 64.03], [-68.5, 64.25], [-68.25, 64.15], [-68.18, 64.18], [-68.15, 64.25], [-68.25, 64.5], [-68.15, 64.75], [-68.25, 65.0], [-68.15, 65.25], [-68.25, 65.5], [-68.03, 66.03], [-67.5, 66.25], [-67.25, 66.15], [-67.0, 66.25], [-66.75, 66.15], [-66.5, 66.25], [-65.97, 66.03], [-65.82, 65.68], [-65.47, 65.53], [-65.32, 65.18], [-65.25, 65.15], [-65.0, 65.25], [-64.75, 65.15], [-64.5, 65.25], [-64.25, 65.15], [-64.0, 65.25], [-63.47, 65.03], [-63.32, 64.68], [-63.25, 64.65], [-63.0, 64.75], [-62.75, 64.65], [-62.5, 64.75], [-61.97, 64.53], [-61.75, 64.0], [-61.97, 63.47], [-62.32, 63.32], [-62.47, 62.97], [-63.0, 62.75], [-63.25, 62.85], [-63.5, 62.75], [-63.75, 62.85], [-64.0, 62.75], [-64.25, 62.85], [-64.5, 62.75], [-64.75, 62.85], [-64.82, 62.82], [-64.97, 62.47], [-65.32, 62.32], [-65.47, 61.97], [-66.0, 61.75], [-66.25, 61.85], [-66.32, 61.82], [-66.47, 61.47], [-67.0, 61.25], [-67.53, 61.47], [-67.75, 62.0], [-67.65, 62.25], [-67.68, 62.32], [-67.75, 62.35], [-68.0, 62.25], [-68.25, 62.35], [-68.5, 62.25], [-69.03, 62.47], [-69.25, 63.0], [-69.15, 63.25], [-69.25, 63.5], [-69.03, 64.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.967312219739568}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.384713158200764}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.358545380383362, -14.140415431715894, -13.054522819137844]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-18.73370954609507, -18.16294505132842, -17.92643324431552]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.731281950050191, -6.693395050578415, -5.729462473973687]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.967312219739568, -8.450021339471704, -7.3399320059209]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6637409896359043, -1.7158877964807135, -1.507762873332217]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9768543813253456, -2.0063512534473493, -1.7703876504624523]}}