{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-27 23:16:36.977116", "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-Aug-02_to_2026-Aug-04_241.5_46.0"}, "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": 2026080000169}, "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": "August 02 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 04 2026"}, "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": 53790.6414048021}, "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": 46.0}, "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": 241.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "241.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 239.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 45.0], [-120.53, 45.53], [-120.12, 45.7], [-120.25, 46.0], [-120.03, 46.53], [-119.5, 46.75], [-119.25, 46.65], [-119.0, 46.75], [-118.75, 46.65], [-118.68, 46.68], [-118.54, 47.0], [-118.68, 47.32], [-119.03, 47.47], [-119.25, 48.0], [-119.03, 48.53], [-118.5, 48.75], [-117.97, 48.53], [-117.82, 48.18], [-117.75, 48.15], [-117.5, 48.25], [-116.97, 48.03], [-116.82, 47.68], [-116.47, 47.53], [-116.25, 47.0], [-116.35, 46.75], [-116.25, 46.5], [-116.35, 46.25], [-116.32, 46.18], [-115.97, 46.03], [-115.75, 45.5], [-115.97, 44.97], [-116.5, 44.75], [-117.0, 44.96], [-117.32, 44.82], [-117.47, 44.47], [-118.0, 44.25], [-118.25, 44.35], [-118.32, 44.32], [-118.47, 43.97], [-119.0, 43.75], [-119.25, 43.85], [-119.5, 43.75], [-120.03, 43.97], [-120.18, 44.32], [-120.53, 44.47], [-120.75, 45.0]]]]}, "2026-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 45.0], [-120.53, 45.53], [-120.12, 45.7], [-120.25, 46.0], [-120.03, 46.53], [-119.5, 46.75], [-119.25, 46.65], [-119.0, 46.75], [-118.75, 46.65], [-118.68, 46.68], [-118.54, 47.0], [-118.68, 47.32], [-119.03, 47.47], [-119.25, 48.0], [-119.03, 48.53], [-118.5, 48.75], [-117.97, 48.53], [-117.82, 48.18], [-117.75, 48.15], [-117.5, 48.25], [-116.97, 48.03], [-116.82, 47.68], [-116.47, 47.53], [-116.25, 47.0], [-116.35, 46.75], [-116.25, 46.5], [-116.35, 46.25], [-116.32, 46.18], [-115.97, 46.03], [-115.75, 45.5], [-115.97, 44.97], [-116.5, 44.75], [-117.0, 44.96], [-117.32, 44.82], [-117.47, 44.47], [-118.0, 44.25], [-118.25, 44.35], [-118.32, 44.32], [-118.47, 43.97], [-119.0, 43.75], [-119.25, 43.85], [-119.5, 43.75], [-120.03, 43.97], [-120.18, 44.32], [-120.53, 44.47], [-120.75, 45.0]]]]}, "2026-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 45.0], [-120.53, 45.53], [-120.12, 45.7], [-120.25, 46.0], [-120.03, 46.53], [-119.5, 46.75], [-119.25, 46.65], [-119.0, 46.75], [-118.75, 46.65], [-118.68, 46.68], [-118.54, 47.0], [-118.68, 47.32], [-119.03, 47.47], [-119.25, 48.0], [-119.03, 48.53], [-118.5, 48.75], [-117.97, 48.53], [-117.82, 48.18], [-117.75, 48.15], [-117.5, 48.25], [-116.97, 48.03], [-116.82, 47.68], [-116.47, 47.53], [-116.25, 47.0], [-116.35, 46.75], [-116.25, 46.5], [-116.35, 46.25], [-116.32, 46.18], [-115.97, 46.03], [-115.75, 45.5], [-115.97, 44.97], [-116.5, 44.75], [-117.0, 44.96], [-117.32, 44.82], [-117.47, 44.47], [-118.0, 44.25], [-118.25, 44.35], [-118.32, 44.32], [-118.47, 43.97], [-119.0, 43.75], [-119.25, 43.85], [-119.5, 43.75], [-120.03, 43.97], [-120.18, 44.32], [-120.53, 44.47], [-120.75, 45.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.210571455764182}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.337158532011088}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.38924616495774, 16.053206024170038, 17.665304056803393]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.341235097249353, 11.57872034708663, 13.178585306803427]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.082997258173668, -6.343480281445466, -4.584998056414131]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.086235288358466, -7.210571455764182, -5.4877659578496605]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6064680834180396, -2.073851647154136, -1.493699923428977]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8751274144177659, -2.364059705887938, -1.8303461008331754]}}