{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:51.688432", "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-Jun-21_to_2023-Jun-23_281.0_37.5"}, "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": 2023060000783}, "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": "June 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 23 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": 74471.74527924933}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Atlantic 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": 37.5}, "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": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-80.18, 38.18], [-80.03, 38.53], [-79.68, 38.68], [-79.53, 39.03], [-79.0, 39.25], [-78.75, 39.15], [-78.5, 39.25], [-78.25, 39.15], [-78.18, 39.18], [-78.03, 39.53], [-77.68, 39.68], [-77.53, 40.03], [-77.0, 40.25], [-76.75, 40.15], [-76.68, 40.18], [-76.53, 40.53], [-76.0, 40.75], [-75.75, 40.65], [-75.68, 40.68], [-75.53, 41.03], [-75.0, 41.25], [-74.75, 41.15], [-74.68, 41.18], [-74.53, 41.53], [-74.0, 41.75], [-73.47, 41.53], [-73.25, 41.0], [-73.35, 40.75], [-73.25, 40.5], [-73.35, 40.25], [-73.25, 40.0], [-73.47, 39.47], [-73.82, 39.32], [-73.97, 38.97], [-74.5, 38.75], [-74.75, 38.85], [-75.0, 38.75], [-75.25, 38.85], [-75.32, 38.82], [-75.47, 38.47], [-76.0, 38.25], [-76.3, 38.38], [-76.47, 37.97], [-77.0, 37.75], [-77.5, 37.96], [-77.82, 37.82], [-77.85, 37.75], [-77.75, 37.5], [-77.97, 36.97], [-78.5, 36.75], [-78.75, 36.85], [-78.82, 36.82], [-78.97, 36.47], [-79.5, 36.25], [-79.75, 36.35], [-80.0, 36.25], [-80.53, 36.47], [-80.75, 37.0], [-80.65, 37.25], [-80.75, 37.5], [-80.53, 38.03], [-80.18, 38.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.75, 37.5], [-80.52999999999997, 38.03], [-80.18, 38.18], [-80.02999999999997, 38.53], [-79.68, 38.68], [-79.52999999999997, 39.03], [-79.0, 39.25], [-78.75, 39.15], [-78.5, 39.25], [-78.25, 39.15], [-78.18, 39.18], [-78.02999999999997, 39.53], [-77.68, 39.68], [-77.52999999999997, 40.03], [-77.0, 40.25], [-76.75, 40.15], [-76.68, 40.18], [-76.52999999999997, 40.53], [-76.0, 40.75], [-75.75, 40.65], [-75.68, 40.68], [-75.52999999999997, 41.03], [-75.0, 41.25], [-74.75, 41.15], [-74.68, 41.18], [-74.52999999999997, 41.53], [-74.0, 41.75], [-73.47000000000003, 41.53], [-73.25, 41.0], [-73.35000000000002, 40.75], [-73.25, 40.5], [-73.35000000000002, 40.25], [-73.25, 40.0], [-73.47000000000003, 39.47], [-73.82, 39.32], [-73.97000000000003, 38.97], [-74.5, 38.75], [-74.75, 38.85], [-75.0, 38.75], [-75.25, 38.85], [-75.32, 38.82], [-75.47000000000003, 38.47], [-76.0, 38.25], [-76.30000000000001, 38.38], [-76.47000000000003, 37.97], [-77.0, 37.75], [-77.5, 37.96], [-77.82, 37.82], [-77.85000000000002, 37.75], [-77.75, 37.5], [-77.97000000000003, 36.97], [-78.5, 36.75], [-78.75, 36.85], [-78.82, 36.82], [-78.97000000000003, 36.47], [-79.5, 36.25], [-79.75, 36.35], [-80.0, 36.25], [-80.52999999999997, 36.47], [-80.75, 37.0], [-80.64999999999998, 37.25], [-80.75, 37.5]]]]}, "2023-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.75, 37.5], [-80.52999999999997, 38.03], [-80.18, 38.18], [-80.02999999999997, 38.53], [-79.68, 38.68], [-79.52999999999997, 39.03], [-79.0, 39.25], [-78.75, 39.15], [-78.5, 39.25], [-78.25, 39.15], [-78.18, 39.18], [-78.02999999999997, 39.53], [-77.68, 39.68], [-77.52999999999997, 40.03], [-77.0, 40.25], [-76.75, 40.15], [-76.68, 40.18], [-76.52999999999997, 40.53], [-76.0, 40.75], [-75.75, 40.65], [-75.68, 40.68], [-75.52999999999997, 41.03], [-75.0, 41.25], [-74.75, 41.15], [-74.68, 41.18], [-74.52999999999997, 41.53], [-74.0, 41.75], [-73.47000000000003, 41.53], [-73.25, 41.0], [-73.35000000000002, 40.75], [-73.25, 40.5], [-73.35000000000002, 40.25], [-73.25, 40.0], [-73.47000000000003, 39.47], [-73.82, 39.32], [-73.97000000000003, 38.97], [-74.5, 38.75], [-74.75, 38.85], [-75.0, 38.75], [-75.25, 38.85], [-75.32, 38.82], [-75.47000000000003, 38.47], [-76.0, 38.25], [-76.30000000000001, 38.38], [-76.47000000000003, 37.97], [-77.0, 37.75], [-77.5, 37.96], [-77.82, 37.82], [-77.85000000000002, 37.75], [-77.75, 37.5], [-77.97000000000003, 36.97], [-78.5, 36.75], [-78.75, 36.85], [-78.82, 36.82], [-78.97000000000003, 36.47], [-79.5, 36.25], [-79.75, 36.35], [-80.0, 36.25], [-80.52999999999997, 36.47], [-80.75, 37.0], [-80.64999999999998, 37.25], [-80.75, 37.5]]]]}, "2023-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.75, 37.5], [-80.52999999999997, 38.03], [-80.18, 38.18], [-80.02999999999997, 38.53], [-79.68, 38.68], [-79.52999999999997, 39.03], [-79.0, 39.25], [-78.75, 39.15], [-78.5, 39.25], [-78.25, 39.15], [-78.18, 39.18], [-78.02999999999997, 39.53], [-77.68, 39.68], [-77.52999999999997, 40.03], [-77.0, 40.25], [-76.75, 40.15], [-76.68, 40.18], [-76.52999999999997, 40.53], [-76.0, 40.75], [-75.75, 40.65], [-75.68, 40.68], [-75.52999999999997, 41.03], [-75.0, 41.25], [-74.75, 41.15], [-74.68, 41.18], [-74.52999999999997, 41.53], [-74.0, 41.75], [-73.47000000000003, 41.53], [-73.25, 41.0], [-73.35000000000002, 40.75], [-73.25, 40.5], [-73.35000000000002, 40.25], [-73.25, 40.0], [-73.47000000000003, 39.47], [-73.82, 39.32], [-73.97000000000003, 38.97], [-74.5, 38.75], [-74.75, 38.85], [-75.0, 38.75], [-75.25, 38.85], [-75.32, 38.82], [-75.47000000000003, 38.47], [-76.0, 38.25], [-76.30000000000001, 38.38], [-76.47000000000003, 37.97], [-77.0, 37.75], [-77.5, 37.96], [-77.82, 37.82], [-77.85000000000002, 37.75], [-77.75, 37.5], [-77.97000000000003, 36.97], [-78.5, 36.75], [-78.75, 36.85], [-78.82, 36.82], [-78.97000000000003, 36.47], [-79.5, 36.25], [-79.75, 36.35], [-80.0, 36.25], [-80.52999999999997, 36.47], [-80.75, 37.0], [-80.64999999999998, 37.25], [-80.75, 37.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.175478638962659}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.947860633754724}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.60390075498657, 16.485790899116296, 19.901830460919484]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.929895822222534, 13.564443529708853, 17.83368379720588]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.499239272849631, -6.7931733734483, -3.5511692549662404]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.414125344142633, -8.175478638962659, -4.1272192319133865]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6786106279730257, -2.6993882690350195, -1.4757326107032207]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1227583898555022, -3.337956712379878, -1.7245112360974018]}}