{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:27.626223", "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": "2014-Oct-04_to_2014-Oct-07_271.0_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": 2014100000217}, "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": "October 04 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 07 2014"}, "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": 53279.95997977888}, "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": 271.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.25}, "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": {"2014-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.25, 53.5], [-91.03, 54.03], [-90.5, 54.25], [-89.97, 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52.65], [-87.68, 52.68], [-87.53, 53.03], [-87.0, 53.25], [-86.47, 53.03], [-86.25, 52.5], [-86.47, 51.97], [-86.82, 51.82], [-86.85, 51.75], [-86.75, 51.5], [-86.97, 50.97], [-87.32, 50.82], [-87.47, 50.47], [-87.82, 50.32], [-87.97, 49.97], [-88.5, 49.75], [-88.75, 49.85], [-89.0, 49.75], [-89.53, 49.97], [-89.68, 50.32], [-90.03, 50.47], [-90.25, 51.0], [-90.15, 51.25], [-90.18, 51.32], [-90.53, 51.47], [-90.75, 52.0], [-90.65, 52.25], [-90.75, 52.5], [-90.65, 52.75], [-90.68, 52.82], [-91.03, 52.97], [-91.25, 53.5]]]]}, "2014-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.25, 53.5], [-91.03, 54.03], [-90.5, 54.25], [-89.97, 54.03], [-89.82, 53.68], [-89.75, 53.65], [-89.68, 53.68], [-89.53, 54.03], [-89.0, 54.25], [-88.47, 54.03], [-88.32, 53.68], [-87.97, 53.53], [-87.75, 53.0], [-87.85, 52.75], [-87.82, 52.68], [-87.75, 52.65], [-87.68, 52.68], [-87.53, 53.03], [-87.0, 53.25], [-86.47, 53.03], [-86.25, 52.5], [-86.47, 51.97], [-86.82, 51.82], [-86.85, 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"Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.723811762840285}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.677896101675598}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.06621316655611054, -0.74953711282933, -0.6022939982480011, -0.896008886811444]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.959961039996756, -1.8299005320374704, -2.1545602783996287, -1.235000639144289]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.501894150321741, -5.973627304032793, -5.640418110743762, -5.273461653666508]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m 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