{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:29.760429", "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": "2023-Mar-02_to_2023-Mar-04_209.5_57.5"}, "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": 2023030000191}, "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 02 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 04 2023"}, "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": 91101.7989788701}, "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.Pacific-Ocean", "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": ["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": 57.5}, "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": 209.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "209.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 206.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 211.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.03, 57.53], [-153.5, 57.75], [-154.03, 57.97], [-154.25, 58.5], [-154.04, 59.0], [-154.25, 59.5], [-154.03, 60.03], [-153.5, 60.25], [-153.25, 60.15], [-153.0, 60.25], [-152.75, 60.15], [-152.5, 60.25], [-151.97, 60.03], [-151.82, 59.68], [-151.75, 59.65], [-151.5, 59.75], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.68, 59.68], [-150.53, 60.03], [-150.0, 60.25], [-149.47, 60.03], [-149.25, 59.5], [-149.35, 59.25], [-149.25, 59.0], [-149.46, 58.5], [-149.32, 58.18], [-148.97, 58.03], [-148.75, 57.5], [-148.85, 57.25], [-148.82, 57.18], [-148.47, 57.03], [-148.32, 56.68], [-147.97, 56.53], [-147.75, 56.0], [-147.97, 55.47], [-148.5, 55.25], [-148.75, 55.35], [-149.0, 55.25], [-149.25, 55.35], [-149.5, 55.25], [-149.75, 55.35], [-150.0, 55.25], [-150.25, 55.35], [-150.5, 55.25], [-150.75, 55.35], [-151.0, 55.25], [-151.53, 55.47], [-151.68, 55.82], [-151.75, 55.85], [-152.0, 55.75], [-152.25, 55.85], [-152.5, 55.75], [-152.75, 55.85], [-153.0, 55.75], [-153.25, 55.85], [-153.5, 55.75], [-154.03, 55.97], [-154.25, 56.5], [-154.15, 56.75], [-154.25, 57.0], [-154.03, 57.53]], [[-153.25, 57.65], [-153.12, 57.7], [-153.18, 57.82], [-153.25, 57.85], [-153.5, 57.75], [-153.25, 57.65]]]]}, "2023-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.03, 57.53], [-153.5, 57.75], [-154.03, 57.97], [-154.25, 58.5], [-154.04, 59.0], [-154.25, 59.5], [-154.03, 60.03], [-153.5, 60.25], [-153.25, 60.15], [-153.0, 60.25], [-152.75, 60.15], [-152.5, 60.25], [-151.97, 60.03], [-151.82, 59.68], [-151.75, 59.65], [-151.5, 59.75], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.68, 59.68], [-150.53, 60.03], [-150.0, 60.25], [-149.47, 60.03], [-149.25, 59.5], [-149.35, 59.25], [-149.25, 59.0], [-149.46, 58.5], [-149.32, 58.18], [-148.97, 58.03], [-148.75, 57.5], [-148.85, 57.25], [-148.82, 57.18], [-148.47, 57.03], [-148.32, 56.68], [-147.97, 56.53], [-147.75, 56.0], [-147.97, 55.47], [-148.5, 55.25], [-148.75, 55.35], [-149.0, 55.25], [-149.25, 55.35], [-149.5, 55.25], [-149.75, 55.35], [-150.0, 55.25], [-150.25, 55.35], [-150.5, 55.25], [-150.75, 55.35], [-151.0, 55.25], [-151.53, 55.47], [-151.68, 55.82], [-151.75, 55.85], [-152.0, 55.75], [-152.25, 55.85], [-152.5, 55.75], [-152.75, 55.85], [-153.0, 55.75], [-153.25, 55.85], [-153.5, 55.75], [-154.03, 55.97], [-154.25, 56.5], [-154.15, 56.75], [-154.25, 57.0], [-154.03, 57.53]], [[-153.25, 57.65], [-153.12, 57.7], [-153.18, 57.82], [-153.25, 57.85], [-153.5, 57.75], [-153.25, 57.65]]]]}, "2023-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.03, 57.53], [-153.5, 57.75], [-154.03, 57.97], [-154.25, 58.5], [-154.04, 59.0], [-154.25, 59.5], [-154.03, 60.03], [-153.5, 60.25], [-153.25, 60.15], [-153.0, 60.25], [-152.75, 60.15], [-152.5, 60.25], [-151.97, 60.03], [-151.82, 59.68], [-151.75, 59.65], [-151.5, 59.75], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.68, 59.68], [-150.53, 60.03], [-150.0, 60.25], [-149.47, 60.03], [-149.25, 59.5], [-149.35, 59.25], [-149.25, 59.0], [-149.46, 58.5], [-149.32, 58.18], [-148.97, 58.03], [-148.75, 57.5], [-148.85, 57.25], [-148.82, 57.18], [-148.47, 57.03], [-148.32, 56.68], [-147.97, 56.53], [-147.75, 56.0], [-147.97, 55.47], [-148.5, 55.25], [-148.75, 55.35], [-149.0, 55.25], [-149.25, 55.35], [-149.5, 55.25], [-149.75, 55.35], [-150.0, 55.25], [-150.25, 55.35], [-150.5, 55.25], [-150.75, 55.35], [-151.0, 55.25], [-151.53, 55.47], [-151.68, 55.82], [-151.75, 55.85], [-152.0, 55.75], [-152.25, 55.85], [-152.5, 55.75], [-152.75, 55.85], [-153.0, 55.75], [-153.25, 55.85], [-153.5, 55.75], [-154.03, 55.97], [-154.25, 56.5], [-154.15, 56.75], [-154.25, 57.0], [-154.03, 57.53]], [[-153.25, 57.65], [-153.12, 57.7], [-153.18, 57.82], [-153.25, 57.85], [-153.5, 57.75], [-153.25, 57.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.062922627957334}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.733626218157066}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.1590296646865, -3.2356770187152506, -2.655418761401336]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.958181312583918, -11.175854693141162, -10.547529084007977]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.914145185807174, -4.9603788048682285, -4.326354663795796]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.920594605942483, -9.062922627957334, -8.374095067119754]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8846279187059316, -1.879952583158661, -1.6154425851608947]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.241341363377126, -2.1510326134413447, -1.9599561142566384]}}