{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:56.200620", "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": "2012-Mar-22_to_2012-Mar-26_235.0_41.0"}, "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": 2012030001305}, "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 22 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 26 2012"}, "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": 55795.87041962974}, "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": ["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": ["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": 41.0}, "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": 235.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "235.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 234.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, 41.53], [-125.0, 41.75], [-124.47, 41.53], [-124.25, 41.0], [-124.35, 40.75], [-124.32, 40.68], [-123.97, 40.53], [-123.75, 40.0], [-123.85, 39.75], [-123.75, 39.5], [-123.97, 38.97], [-124.5, 38.75], [-125.03, 38.97], [-125.25, 39.5], [-125.15, 39.75], [-125.18, 39.82], [-125.53, 39.97], [-125.75, 40.5], [-125.65, 40.75], [-125.75, 41.0], [-125.53, 41.53]]]]}, "2012-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, 41.53], [-125.0, 41.75], [-124.47, 41.53], [-124.25, 41.0], [-124.35, 40.75], [-124.32, 40.68], [-123.97, 40.53], [-123.75, 40.0], [-123.85, 39.75], [-123.82, 39.68], [-123.47, 39.53], [-123.32, 39.18], [-123.25, 39.15], [-123.0, 39.25], [-122.47, 39.03], [-122.32, 38.68], [-121.97, 38.53], [-121.75, 38.0], [-121.85, 37.75], [-121.82, 37.68], [-121.47, 37.53], [-121.25, 37.0], [-121.47, 36.47], [-121.82, 36.32], [-121.97, 35.97], [-122.5, 35.75], [-123.03, 35.97], [-123.18, 36.32], [-123.53, 36.47], [-123.68, 36.82], [-124.03, 36.97], [-124.18, 37.32], [-124.53, 37.47], [-124.68, 37.82], [-125.03, 37.97], [-125.25, 38.5], [-125.15, 38.75], [-125.25, 39.0], [-125.15, 39.25], [-125.25, 39.5], [-125.15, 39.75], [-125.18, 39.82], [-125.53, 39.97], [-125.75, 40.5], [-125.65, 40.75], [-125.75, 41.0], [-125.53, 41.53]]]]}, "2012-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, 41.53], [-125.0, 41.75], [-124.47, 41.53], [-124.25, 41.0], [-124.35, 40.75], [-124.32, 40.68], [-123.97, 40.53], [-123.75, 40.0], [-123.85, 39.75], [-123.82, 39.68], [-123.47, 39.53], [-123.32, 39.18], [-123.25, 39.15], [-123.0, 39.25], [-122.75, 39.15], [-122.5, 39.25], [-121.97, 39.03], [-121.75, 38.5], [-121.85, 38.25], [-121.75, 38.0], [-121.85, 37.75], [-121.82, 37.68], [-121.47, 37.53], [-121.25, 37.0], [-121.47, 36.47], [-121.82, 36.32], [-121.97, 35.97], [-122.5, 35.75], [-123.03, 35.97], [-123.18, 36.32], [-123.25, 36.35], [-123.5, 36.25], [-124.03, 36.47], [-124.25, 37.0], [-124.15, 37.25], [-124.18, 37.32], [-124.53, 37.47], [-124.68, 37.82], [-125.03, 37.97], 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