{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:56.237115", "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-Mar-30_to_2014-Apr-01_253.0_54.5"}, "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": 2014030001144}, "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": "March 30 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 01 2014"}, "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": 75825.28298014445}, "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", "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": 54.5}, "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": 253.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "253.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 251.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.75}, "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": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.25, 54.5], [-109.03, 55.03], [-108.5, 55.25], [-107.97, 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[-105.75, 52.85], [-106.0, 52.75], [-106.25, 52.85], [-106.5, 52.75], [-106.75, 52.85], [-107.0, 52.75], [-107.53, 52.97], [-107.68, 53.32], [-107.75, 53.35], [-108.0, 53.25], [-108.53, 53.47], [-108.68, 53.82], [-109.03, 53.97], [-109.25, 54.5]]]]}, "2014-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.25, 54.5], [-109.03, 55.03], [-108.5, 55.25], [-107.97, 55.03], [-107.82, 54.68], [-107.75, 54.65], [-107.68, 54.68], [-107.53, 55.03], [-107.0, 55.25], [-106.75, 55.15], [-106.5, 55.25], [-105.97, 55.03], [-105.82, 54.68], [-105.75, 54.65], [-105.62, 54.7], [-105.75, 55.0], [-105.53, 55.53], [-105.0, 55.75], [-104.75, 55.65], [-104.5, 55.75], [-104.25, 55.65], [-104.0, 55.75], [-103.75, 55.65], [-103.5, 55.75], [-103.25, 55.65], [-103.0, 55.75], [-102.75, 55.65], [-102.5, 55.75], [-102.25, 55.65], [-102.0, 55.75], [-101.75, 55.65], [-101.5, 55.75], [-101.25, 55.65], [-101.0, 55.75], [-100.75, 55.65], [-100.5, 55.75], [-99.97, 55.53], [-99.75, 55.0], [-99.97, 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