{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:10.832574", "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": "2020-Mar-25_to_2020-Mar-27_240.5_41.5"}, "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": 2020030000645}, "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 25 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 27 2020"}, "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": 80040.85037284519}, "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": []}, "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": 41.5}, "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": 240.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 41.03], [-122.0, 41.25], [-121.75, 41.15], [-121.68, 41.18], [-121.53, 41.53], [-121.18, 41.68], [-121.04, 42.0], [-121.25, 42.5], [-121.03, 43.03], [-120.5, 43.25], [-119.97, 43.03], [-119.82, 42.68], [-119.75, 42.65], [-119.68, 42.68], [-119.53, 43.03], [-119.0, 43.25], [-118.47, 43.03], [-118.25, 42.5], [-118.46, 42.0], [-118.25, 41.5], [-118.35, 41.25], [-118.25, 41.0], [-118.47, 40.47], [-118.82, 40.32], [-118.97, 39.97], [-119.32, 39.82], [-119.46, 39.5], [-119.25, 39.0], [-119.47, 38.47], [-120.0, 38.25], [-120.25, 38.35], [-120.32, 38.32], [-120.47, 37.97], [-121.0, 37.75], [-121.25, 37.85], [-121.5, 37.75], [-121.75, 37.85], [-122.0, 37.75], [-122.53, 37.97], [-122.75, 38.5], [-122.53, 39.03], [-122.18, 39.18], [-122.15, 39.25], [-122.18, 39.32], [-122.53, 39.47], [-122.75, 40.0], [-122.65, 40.25], [-122.75, 40.5], [-122.53, 41.03]]]]}, "2020-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 41.03], [-122.0, 41.25], [-121.75, 41.15], [-121.68, 41.18], [-121.53, 41.53], [-121.18, 41.68], [-121.04, 42.0], [-121.25, 42.5], [-121.03, 43.03], [-120.5, 43.25], [-119.97, 43.03], [-119.82, 42.68], [-119.75, 42.65], [-119.68, 42.68], [-119.53, 43.03], [-119.0, 43.25], [-118.47, 43.03], [-118.25, 42.5], [-118.46, 42.0], [-118.25, 41.5], [-118.35, 41.25], [-118.25, 41.0], [-118.47, 40.47], [-118.82, 40.32], [-118.97, 39.97], [-119.32, 39.82], [-119.46, 39.5], [-119.25, 39.0], [-119.47, 38.47], [-120.0, 38.25], [-120.25, 38.35], [-120.32, 38.32], [-120.47, 37.97], [-121.0, 37.75], [-121.25, 37.85], [-121.5, 37.75], [-121.75, 37.85], [-122.0, 37.75], [-122.53, 37.97], [-122.75, 38.5], [-122.53, 39.03], [-122.18, 39.18], [-122.15, 39.25], [-122.18, 39.32], [-122.53, 39.47], [-122.75, 40.0], [-122.65, 40.25], [-122.75, 40.5], [-122.53, 41.03]]]]}, "2020-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 41.03], [-122.0, 41.25], [-121.75, 41.15], [-121.68, 41.18], [-121.53, 41.53], [-121.18, 41.68], [-121.04, 42.0], [-121.25, 42.5], [-121.03, 43.03], [-120.5, 43.25], [-119.97, 43.03], [-119.82, 42.68], [-119.75, 42.65], [-119.68, 42.68], [-119.53, 43.03], [-119.0, 43.25], [-118.47, 43.03], [-118.25, 42.5], [-118.46, 42.0], [-118.25, 41.5], [-118.35, 41.25], [-118.25, 41.0], [-118.47, 40.47], [-118.82, 40.32], [-118.97, 39.97], [-119.32, 39.82], [-119.46, 39.5], [-119.25, 39.0], [-119.47, 38.47], [-120.0, 38.25], [-120.25, 38.35], [-120.32, 38.32], [-120.47, 37.97], [-121.0, 37.75], [-121.25, 37.85], [-121.5, 37.75], [-121.75, 37.85], [-122.0, 37.75], [-122.53, 37.97], [-122.75, 38.5], [-122.53, 39.03], [-122.18, 39.18], [-122.15, 39.25], [-122.18, 39.32], [-122.53, 39.47], [-122.75, 40.0], [-122.65, 40.25], [-122.75, 40.5], [-122.53, 41.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.200494211720184}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.5186109020343554}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.9706250433490595, -1.239197466114888, -0.14830394887553666]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.445138411842265, -9.256242214171039, -7.207568085887317]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.390217621403391, -7.618555395509795, -6.547059689189877]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.361436278510496, -12.200494211720184, -10.158851046615496]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5735432300623757, -2.195898493467345, -1.8820616422636731]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7773553978029555, -2.8564477713019376, -2.476497466738001]}}