{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:26.263784", "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-Jul-09_to_2017-Jul-12_224.5_61.0"}, "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": 2017070000352}, "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": "July 09 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 2017"}, "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": 57272.01272652091}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.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": 61.0}, "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": 224.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "224.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 221.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 227.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-139.03, 58.97], [-139.25, 59.5], [-139.03, 60.03], [-138.5, 60.25], [-138.25, 60.15], [-138.0, 60.25], [-137.75, 60.15], [-137.68, 60.18], [-137.53, 60.53], [-137.0, 60.75], [-136.47, 60.53], [-136.25, 60.0], [-136.35, 59.75], [-136.25, 59.5], [-136.47, 58.97], [-137.0, 58.75], [-137.25, 58.85], [-137.5, 58.75], [-137.75, 58.85], [-138.0, 58.75], [-138.25, 58.85], [-138.5, 58.75], [-139.03, 58.97]]]]}, "2017-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-139.03, 58.97], [-139.25, 59.5], [-139.03, 60.03], [-138.5, 60.25], [-138.25, 60.15], [-138.12, 60.2], [-138.18, 60.32], [-138.53, 60.47], [-138.75, 61.0], [-138.53, 61.53], [-138.0, 61.75], [-137.75, 61.65], [-137.68, 61.68], [-137.53, 62.03], [-137.0, 62.25], [-136.75, 62.15], [-136.68, 62.18], [-136.53, 62.53], [-136.0, 62.75], [-135.75, 62.65], [-135.5, 62.75], [-134.97, 62.53], [-134.82, 62.18], [-134.75, 62.15], [-134.5, 62.25], [-134.25, 62.15], [-134.0, 62.25], [-133.75, 62.15], [-133.5, 62.25], [-133.25, 62.15], [-133.0, 62.25], [-132.75, 62.15], [-132.5, 62.25], [-131.97, 62.03], [-131.75, 61.5], [-131.97, 60.97], [-132.5, 60.75], [-132.75, 60.85], [-132.82, 60.82], [-132.97, 60.47], [-133.32, 60.32], [-133.47, 59.97], [-134.0, 59.75], [-134.25, 59.85], [-134.5, 59.75], [-134.75, 59.85], [-134.82, 59.82], [-134.97, 59.47], [-135.5, 59.25], [-135.75, 59.35], [-136.0, 59.25], [-136.25, 59.35], [-136.32, 59.32], [-136.47, 58.97], [-137.0, 58.75], [-137.25, 58.85], [-137.5, 58.75], [-137.75, 58.85], [-138.0, 58.75], [-138.25, 58.85], [-138.5, 58.75], [-139.03, 58.97]]]]}, "2017-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-139.03, 58.97], [-139.25, 59.5], [-139.03, 60.03], [-138.5, 60.25], [-138.25, 60.15], [-138.12, 60.2], [-138.18, 60.32], [-138.53, 60.47], [-138.75, 61.0], [-138.53, 61.53], [-138.0, 61.75], [-137.75, 61.65], [-137.68, 61.68], [-137.53, 62.03], [-137.0, 62.25], [-136.75, 62.15], [-136.68, 62.18], [-136.53, 62.53], [-136.0, 62.75], [-135.75, 62.65], [-135.5, 62.75], [-134.97, 62.53], [-134.82, 62.18], [-134.75, 62.15], [-134.5, 62.25], [-134.25, 62.15], [-134.0, 62.25], [-133.75, 62.15], [-133.5, 62.25], [-133.25, 62.15], [-133.0, 62.25], [-132.75, 62.15], [-132.5, 62.25], [-131.97, 62.03], [-131.75, 61.5], [-131.97, 60.97], [-132.5, 60.75], [-132.75, 60.85], [-132.82, 60.82], [-132.97, 60.47], [-133.32, 60.32], [-133.47, 59.97], [-134.0, 59.75], [-134.25, 59.85], [-134.5, 59.75], [-134.75, 59.85], [-134.82, 59.82], [-134.97, 59.47], [-135.5, 59.25], [-135.75, 59.35], [-136.0, 59.25], [-136.25, 59.35], [-136.32, 59.32], [-136.47, 58.97], [-137.0, 58.75], [-137.25, 58.85], [-137.5, 58.75], [-137.75, 58.85], [-138.0, 58.75], [-138.25, 58.85], [-138.5, 58.75], [-139.03, 58.97]]]]}, "2017-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-138.75, 61.0], [-138.53, 61.53], [-138.0, 61.75], [-137.75, 61.65], [-137.68, 61.68], [-137.53, 62.03], [-137.0, 62.25], [-136.75, 62.15], [-136.68, 62.18], [-136.53, 62.53], [-136.0, 62.75], [-135.75, 62.65], [-135.5, 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"evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.376677855883372, 7.396259048615889, 6.234077409840609, 8.176069618560348]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.5553501860717915, 3.303064404952636, 2.6154805335946207, 2.544661497547679]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.388066163183953, -4.418661430990159, -5.5990846992101, -4.0179006360345655]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6398803466410072, -5.379416411473301, -7.104356861253223, -5.19546304518434]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2722591533176417, -1.784503363757302, -2.2942712849007574, -1.6203102239775873]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3185791429415823, -2.143698594521526, -2.9450810146829944, -1.8927909668603187]}}