{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:27.047690", "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": "2026-Apr-02_to_2026-Apr-06_202.0_58.0"}, "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": 2026040000124}, "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": "April 02 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 52993.49461228883}, "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": ["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": ["Bering Sea", "Gulf of Alaska", "North Pacific Ocean"]}, "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": 58.0}, "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": 202.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "202.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 194.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-159.5, 57.75], [-158.97, 57.53], [-158.75, 57.0], [-158.97, 56.47], [-159.5, 56.25], [-160.03, 56.47], [-160.25, 57.0], [-160.03, 57.53], [-159.5, 57.75]]]]}, "2026-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.53, 55.47], [-165.75, 56.0], [-165.53, 56.53], [-165.0, 56.75], [-164.75, 56.65], [-164.5, 56.75], [-164.25, 56.65], [-164.0, 56.75], [-163.75, 56.65], [-163.5, 56.75], [-163.25, 56.65], [-163.18, 56.68], [-163.03, 57.03], [-162.5, 57.25], [-162.25, 57.15], [-162.0, 57.25], [-161.75, 57.15], [-161.5, 57.25], [-161.25, 57.15], [-161.18, 57.18], [-161.03, 57.53], [-160.5, 57.75], [-160.25, 57.65], [-160.0, 57.75], [-159.75, 57.65], [-159.5, 57.75], [-159.25, 57.65], [-159.18, 57.68], [-159.03, 58.03], [-158.68, 58.18], [-158.53, 58.53], [-158.0, 58.75], [-157.47, 58.53], [-157.25, 58.0], [-157.47, 57.47], [-157.82, 57.32], [-157.97, 56.97], [-158.32, 56.82], [-158.47, 56.47], [-158.82, 56.32], [-158.97, 55.97], [-159.37, 55.8], [-159.32, 55.68], [-158.97, 55.53], [-158.75, 55.0], [-158.97, 54.47], [-159.5, 54.25], [-159.75, 54.35], [-160.0, 54.25], [-160.25, 54.35], [-160.32, 54.32], [-160.47, 53.97], [-161.0, 53.75], [-161.53, 53.97], [-161.75, 54.5], [-161.53, 55.03], [-161.18, 55.18], [-161.12, 55.3], [-161.25, 55.35], [-161.5, 55.25], [-161.75, 55.35], [-162.0, 55.25], [-162.25, 55.35], [-162.5, 55.25], [-162.75, 55.35], [-163.0, 55.25], [-163.25, 55.35], [-163.5, 55.25], [-163.75, 55.35], [-164.0, 55.25], [-164.25, 55.35], [-164.5, 55.25], [-164.75, 55.35], [-165.0, 55.25], [-165.53, 55.47]]]]}, "2026-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.53, 55.47], [-165.75, 56.0], [-165.53, 56.53], [-165.0, 56.75], [-164.75, 56.65], [-164.5, 56.75], [-164.25, 56.65], [-164.0, 56.75], [-163.75, 56.65], [-163.5, 56.75], [-163.25, 56.65], [-163.18, 56.68], [-163.03, 57.03], [-162.5, 57.25], [-162.25, 57.15], [-162.0, 57.25], [-161.75, 57.15], [-161.5, 57.25], [-161.25, 57.15], [-161.18, 57.18], [-161.03, 57.53], [-160.5, 57.75], [-160.25, 57.65], [-160.0, 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