{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:00.886538", "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": "2018-Sep-16_to_2018-Sep-18_285.0_57.5"}, "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": 2018090000657}, "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": "September 16 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 18 2018"}, "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": 186054.22884912154}, "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": 57.5}, "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": 285.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "285.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 283.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 290.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.15, 58.25], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25], [-77.25, 59.5], [-77.15, 59.75], [-77.25, 60.0], [-77.03, 60.53], [-76.5, 60.75], [-76.25, 60.65], [-76.0, 60.75], [-75.47, 60.53], [-75.32, 60.18], [-74.97, 60.03], [-74.82, 59.68], [-74.75, 59.65], [-74.5, 59.75], [-74.25, 59.65], [-74.0, 59.75], [-73.75, 59.65], [-73.5, 59.75], [-73.25, 59.65], [-73.18, 59.68], [-73.03, 60.03], [-72.5, 60.25], [-72.25, 60.15], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-70.97, 60.03], [-70.75, 59.5], [-70.96, 59.0], [-70.75, 58.5], [-70.85, 58.25], [-70.75, 58.0], [-70.97, 57.47], [-71.37, 57.3], [-71.25, 57.0], [-71.35, 56.75], [-71.32, 56.68], [-70.97, 56.53], [-70.82, 56.18], [-70.75, 56.15], [-70.5, 56.25], [-69.97, 56.03], [-69.82, 55.68], [-69.47, 55.53], [-69.25, 55.0], [-69.47, 54.47], [-69.82, 54.32], [-69.85, 54.25], [-69.75, 54.0], [-69.97, 53.47], [-70.5, 53.25], [-70.75, 53.35], [-70.82, 53.32], [-70.97, 52.97], [-71.5, 52.75], [-72.03, 52.97], [-72.18, 53.32], [-72.25, 53.35], [-72.5, 53.25], [-72.75, 53.35], [-73.0, 53.25], [-73.53, 53.47], [-73.68, 53.82], [-74.03, 53.97], [-74.18, 54.32], [-74.25, 54.35], [-74.5, 54.25], [-74.75, 54.35], [-75.0, 54.25], [-75.25, 54.35], [-75.5, 54.25], [-75.75, 54.35], [-76.0, 54.25], [-76.53, 54.47], [-76.75, 55.0], [-76.65, 55.25], [-76.75, 55.5], [-76.65, 55.75], [-76.75, 56.0], [-76.53, 56.53], [-76.18, 56.68], [-76.12, 56.8], [-76.25, 56.85], [-76.5, 56.75], [-77.03, 56.97], [-77.25, 57.5], [-77.15, 57.75], [-77.25, 58.0], [-77.15, 58.25]]]]}, "2018-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.15, 58.25], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25], [-77.25, 59.5], [-77.15, 59.75], [-77.25, 60.0], [-77.03, 60.53], [-76.5, 60.75], [-76.25, 60.65], [-76.0, 60.75], [-75.47, 60.53], [-75.32, 60.18], [-74.97, 60.03], [-74.82, 59.68], [-74.75, 59.65], [-74.5, 59.75], [-74.25, 59.65], [-74.0, 59.75], [-73.75, 59.65], [-73.5, 59.75], [-73.25, 59.65], [-73.18, 59.68], [-73.03, 60.03], [-72.5, 60.25], [-72.25, 60.15], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-70.97, 60.03], [-70.75, 59.5], [-70.96, 59.0], [-70.75, 58.5], [-70.85, 58.25], [-70.75, 58.0], [-70.97, 57.47], [-71.37, 57.3], [-71.25, 57.0], [-71.35, 56.75], [-71.32, 56.68], [-70.97, 56.53], [-70.82, 56.18], [-70.75, 56.15], [-70.5, 56.25], [-69.97, 56.03], [-69.82, 55.68], [-69.47, 55.53], [-69.25, 55.0], [-69.47, 54.47], [-69.82, 54.32], [-69.85, 54.25], [-69.75, 54.0], [-69.97, 53.47], [-70.5, 53.25], [-70.75, 53.35], [-70.82, 53.32], [-70.97, 52.97], [-71.5, 52.75], [-72.03, 52.97], [-72.18, 53.32], [-72.25, 53.35], [-72.5, 53.25], [-72.75, 53.35], [-73.0, 53.25], [-73.53, 53.47], [-73.68, 53.82], [-74.03, 53.97], [-74.18, 54.32], [-74.25, 54.35], [-74.5, 54.25], [-74.75, 54.35], [-75.0, 54.25], [-75.25, 54.35], [-75.5, 54.25], [-75.75, 54.35], [-76.0, 54.25], [-76.53, 54.47], [-76.75, 55.0], [-76.65, 55.25], [-76.75, 55.5], [-76.65, 55.75], [-76.75, 56.0], [-76.53, 56.53], [-76.18, 56.68], [-76.12, 56.8], [-76.25, 56.85], [-76.5, 56.75], [-77.03, 56.97], [-77.25, 57.5], [-77.15, 57.75], [-77.25, 58.0], [-77.15, 58.25]]]]}, "2018-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.15, 58.25], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25], [-77.25, 59.5], [-77.15, 59.75], [-77.25, 60.0], [-77.03, 60.53], [-76.5, 60.75], [-76.25, 60.65], [-76.0, 60.75], [-75.47, 60.53], [-75.32, 60.18], [-74.97, 60.03], [-74.82, 59.68], [-74.75, 59.65], [-74.5, 59.75], [-74.25, 59.65], [-74.0, 59.75], [-73.75, 59.65], [-73.5, 59.75], [-73.25, 59.65], [-73.18, 59.68], [-73.03, 60.03], [-72.5, 60.25], [-72.25, 60.15], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-70.97, 60.03], [-70.75, 59.5], [-70.96, 59.0], [-70.75, 58.5], [-70.85, 58.25], [-70.75, 58.0], [-70.97, 57.47], [-71.37, 57.3], [-71.25, 57.0], [-71.35, 56.75], [-71.32, 56.68], [-70.97, 56.53], [-70.82, 56.18], [-70.75, 56.15], [-70.5, 56.25], [-69.97, 56.03], [-69.82, 55.68], [-69.47, 55.53], 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duration", "value": -4.196535819062622}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.366386679217783, 1.0323466665188903, 1.1043356518117662]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1656151786996247, -0.3981897217030905, -0.032118684435317846]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.629070316404741, -4.669900370342031, -4.290636770441086]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.855407185687, -5.389880666665476, -5.26807996129088]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2563887788514716, -1.66798594422463, -1.5174521497347024]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4582906382742562, -2.0552904417604445, -1.820917938237161]}}