{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:39.957673", "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-Aug-14_to_2017-Aug-16_290.5_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": 2017080000464}, "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": "August 14 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 16 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": 50225.52187273315}, "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": 290.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 53.5], [-74.53, 54.03], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-73.25, 54.15], [-73.0, 54.25], [-72.75, 54.15], [-72.5, 54.25], [-72.25, 54.15], [-72.0, 54.25], [-71.75, 54.15], [-71.5, 54.25], [-71.25, 54.15], [-71.0, 54.25], [-70.75, 54.15], [-70.5, 54.25], [-70.25, 54.15], [-70.0, 54.25], [-69.47, 54.03], [-69.32, 53.68], [-69.25, 53.65], [-69.0, 53.75], [-68.47, 53.53], [-68.25, 53.0], [-68.35, 52.75], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.5, 51.75], [-69.75, 51.85], [-70.0, 51.75], [-70.25, 51.85], [-70.32, 51.82], [-70.47, 51.47], [-71.0, 51.25], [-71.53, 51.47], [-71.68, 51.82], [-71.75, 51.85], [-72.0, 51.75], [-72.53, 51.97], [-72.68, 52.32], [-72.75, 52.35], [-73.0, 52.25], [-73.25, 52.35], [-73.5, 52.25], [-74.03, 52.47], [-74.18, 52.82], [-74.53, 52.97], [-74.75, 53.5]]]]}, "2017-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 53.5], [-74.53, 54.03], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-73.25, 54.15], [-73.0, 54.25], [-72.75, 54.15], [-72.5, 54.25], [-72.25, 54.15], [-72.0, 54.25], [-71.75, 54.15], [-71.5, 54.25], [-71.25, 54.15], [-71.0, 54.25], [-70.75, 54.15], [-70.5, 54.25], [-70.25, 54.15], [-70.0, 54.25], [-69.47, 54.03], [-69.32, 53.68], [-69.25, 53.65], [-69.0, 53.75], [-68.47, 53.53], [-68.25, 53.0], [-68.35, 52.75], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.5, 51.75], [-69.75, 51.85], [-70.0, 51.75], [-70.25, 51.85], [-70.32, 51.82], [-70.47, 51.47], [-71.0, 51.25], [-71.53, 51.47], [-71.68, 51.82], [-71.75, 51.85], [-72.0, 51.75], [-72.53, 51.97], [-72.68, 52.32], [-72.75, 52.35], [-73.0, 52.25], [-73.25, 52.35], [-73.5, 52.25], [-74.03, 52.47], [-74.18, 52.82], [-74.53, 52.97], [-74.75, 53.5]]]]}, "2017-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 53.5], [-74.53, 54.03], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-73.25, 54.15], [-73.0, 54.25], [-72.75, 54.15], [-72.5, 54.25], [-72.25, 54.15], [-72.0, 54.25], [-71.75, 54.15], [-71.5, 54.25], [-71.25, 54.15], [-71.0, 54.25], [-70.75, 54.15], [-70.5, 54.25], [-70.25, 54.15], [-70.0, 54.25], [-69.47, 54.03], [-69.32, 53.68], [-69.25, 53.65], [-69.0, 53.75], [-68.47, 53.53], [-68.25, 53.0], [-68.35, 52.75], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.5, 51.75], [-69.75, 51.85], [-70.0, 51.75], [-70.25, 51.85], [-70.32, 51.82], [-70.47, 51.47], [-71.0, 51.25], [-71.53, 51.47], [-71.68, 51.82], [-71.75, 51.85], [-72.0, 51.75], [-72.53, 51.97], [-72.68, 52.32], [-72.75, 52.35], [-73.0, 52.25], [-73.25, 52.35], [-73.5, 52.25], [-74.03, 52.47], [-74.18, 52.82], [-74.53, 52.97], [-74.75, 53.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.471608376455606}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.196141061548319}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.47280219980155, 8.578216743772941, 9.220814380296304]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.001781287373774, 7.3560131670294595, 8.381687338949234]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.875432378569306, -4.701497605173552, -4.0114932009021]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.354746297704253, -5.471608376455606, -4.488924674130544]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3022759939747275, -1.6343603164976155, -1.4397657405238375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4097605338151327, -2.0091518209746644, -1.6188326236598534]}}