{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:41.809056", "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-May-20_to_2018-May-22_266.0_61.5"}, "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": 2018050000855}, "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 20 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 22 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": 113142.29679734325}, "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": ["Hudson Bay"]}, "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": 61.5}, "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": 266.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 260.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 268.25}, "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": 63.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.75, 61.0], [-99.53, 61.53], [-99.18, 61.68], [-99.15, 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58.85], [-97.5, 58.75], [-98.03, 58.97], [-98.18, 59.32], [-98.25, 59.35], [-98.5, 59.25], [-99.03, 59.47], [-99.25, 60.0], [-99.15, 60.25], [-99.18, 60.32], [-99.53, 60.47], [-99.75, 61.0]]]]}, "2018-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.75, 61.0], [-99.53, 61.53], [-99.18, 61.68], [-99.15, 61.75], [-99.25, 62.0], [-99.03, 62.53], [-98.5, 62.75], [-97.97, 62.53], [-97.82, 62.18], [-97.75, 62.15], [-97.5, 62.25], [-97.25, 62.15], [-97.0, 62.25], [-96.75, 62.15], [-96.68, 62.18], [-96.53, 62.53], [-96.18, 62.68], [-96.15, 62.75], [-96.25, 63.0], [-96.15, 63.25], [-96.25, 63.5], [-96.03, 64.03], [-95.5, 64.25], [-94.97, 64.03], [-94.82, 63.68], [-94.75, 63.65], [-94.5, 63.75], [-94.25, 63.65], [-94.0, 63.75], [-93.75, 63.65], [-93.5, 63.75], [-92.97, 63.53], [-92.82, 63.18], [-92.75, 63.15], [-92.5, 63.25], [-92.25, 63.15], [-92.0, 63.25], [-91.47, 63.03], [-91.25, 62.5], [-91.47, 61.97], [-91.82, 61.82], [-91.85, 61.75], [-91.75, 61.5], [-91.97, 60.97], [-92.32, 60.82], [-92.47, 60.47], [-92.82, 60.32], [-92.97, 59.97], [-93.32, 59.82], [-93.47, 59.47], [-94.0, 59.25], [-94.25, 59.35], [-94.32, 59.32], [-94.47, 58.97], [-95.0, 58.75], [-95.25, 58.85], [-95.5, 58.75], [-95.75, 58.85], [-96.0, 58.75], [-96.25, 58.85], [-96.5, 58.75], [-96.75, 58.85], [-97.0, 58.75], [-97.25, 58.85], [-97.5, 58.75], [-98.03, 58.97], [-98.18, 59.32], [-98.25, 59.35], [-98.5, 59.25], [-99.03, 59.47], [-99.25, 60.0], [-99.15, 60.25], [-99.18, 60.32], [-99.53, 60.47], [-99.75, 61.0]]]]}, "2018-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.75, 61.0], [-99.53, 61.53], [-99.18, 61.68], [-99.15, 61.75], [-99.25, 62.0], [-99.03, 62.53], [-98.5, 62.75], [-97.97, 62.53], [-97.82, 62.18], [-97.75, 62.15], [-97.5, 62.25], [-97.25, 62.15], [-97.0, 62.25], [-96.75, 62.15], [-96.68, 62.18], [-96.53, 62.53], [-96.18, 62.68], [-96.15, 62.75], [-96.25, 63.0], [-96.15, 63.25], [-96.25, 63.5], [-96.03, 64.03], [-95.5, 64.25], [-94.97, 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-7.737102203117161}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.417674918192155}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.337770787758416, -7.161166381070416, -6.1361745333096]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.179108658606367, -8.954451685712002, -7.59223438801547]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.553637216979939, -5.706726209952466, -4.992661327644055]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.813794973027882, -7.737102203117161, -6.383026024970206]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6243862889854572, -1.7167569049151001, -1.5294915890971432]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0330563819652983, -2.0449122278367033, -1.8326066468332838]}}