{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:26.492981", "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-Sep-23_to_2012-Sep-25_278.0_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": 2012090000865}, "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": "September 23 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2012"}, "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": 111863.41318423246}, "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": ["E.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": 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": 278.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "278.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 280.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.18, 38.68], [-84.03, 39.03], [-83.68, 39.18], [-83.53, 39.53], [-83.0, 39.75], [-82.75, 39.65], [-82.68, 39.68], [-82.53, 40.03], [-82.0, 40.25], [-81.75, 40.15], [-81.68, 40.18], [-81.53, 40.53], [-81.0, 40.75], [-80.47, 40.53], [-80.32, 40.18], [-80.25, 40.15], [-80.0, 40.25], [-79.47, 40.03], [-79.32, 39.68], [-78.97, 39.53], [-78.75, 39.0], [-78.97, 38.47], [-79.32, 38.32], [-79.47, 37.97], [-79.82, 37.82], [-79.97, 37.47], [-80.5, 37.25], [-80.75, 37.35], [-80.82, 37.32], [-80.97, 36.97], [-81.32, 36.82], [-81.35, 36.75], [-81.25, 36.5], [-81.47, 35.97], [-82.0, 35.75], [-82.25, 35.85], [-82.32, 35.82], [-82.47, 35.47], [-83.0, 35.25], [-83.25, 35.35], [-83.5, 35.25], [-84.03, 35.47], [-84.25, 36.0], [-84.15, 36.25], [-84.25, 36.5], [-84.15, 36.75], [-84.18, 36.82], [-84.25, 36.85], [-84.5, 36.75], [-85.03, 36.97], [-85.25, 37.5], [-85.03, 38.03], [-84.68, 38.18], [-84.53, 38.53], [-84.18, 38.68]]]]}, "2012-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.18, 38.68], [-84.03, 39.03], [-83.68, 39.18], [-83.53, 39.53], [-83.0, 39.75], [-82.75, 39.65], [-82.68, 39.68], [-82.53, 40.03], [-82.0, 40.25], [-81.75, 40.15], [-81.68, 40.18], [-81.53, 40.53], [-81.0, 40.75], [-80.47, 40.53], [-80.32, 40.18], [-80.25, 40.15], [-80.0, 40.25], [-79.47, 40.03], [-79.32, 39.68], [-78.97, 39.53], [-78.75, 39.0], [-78.97, 38.47], [-79.32, 38.32], [-79.47, 37.97], [-79.82, 37.82], [-79.97, 37.47], [-80.5, 37.25], [-80.75, 37.35], [-80.82, 37.32], [-80.97, 36.97], [-81.32, 36.82], [-81.35, 36.75], [-81.25, 36.5], [-81.47, 35.97], [-82.0, 35.75], [-82.25, 35.85], [-82.32, 35.82], [-82.47, 35.47], [-83.0, 35.25], [-83.25, 35.35], [-83.5, 35.25], [-84.03, 35.47], [-84.25, 36.0], [-84.15, 36.25], [-84.25, 36.5], [-84.15, 36.75], [-84.18, 36.82], [-84.25, 36.85], [-84.5, 36.75], [-85.03, 36.97], [-85.25, 37.5], [-85.03, 38.03], [-84.68, 38.18], [-84.53, 38.53], [-84.18, 38.68]]]]}, "2012-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.18, 38.68], [-84.03, 39.03], [-83.68, 39.18], [-83.53, 39.53], [-83.0, 39.75], [-82.75, 39.65], [-82.68, 39.68], [-82.53, 40.03], [-82.0, 40.25], [-81.75, 40.15], [-81.68, 40.18], [-81.53, 40.53], [-81.0, 40.75], [-80.47, 40.53], [-80.32, 40.18], [-80.25, 40.15], [-80.0, 40.25], [-79.47, 40.03], [-79.32, 39.68], [-78.97, 39.53], [-78.75, 39.0], [-78.97, 38.47], [-79.32, 38.32], [-79.47, 37.97], [-79.82, 37.82], [-79.97, 37.47], [-80.5, 37.25], [-80.75, 37.35], [-80.82, 37.32], [-80.97, 36.97], [-81.32, 36.82], [-81.35, 36.75], [-81.25, 36.5], [-81.47, 35.97], [-82.0, 35.75], [-82.25, 35.85], [-82.32, 35.82], [-82.47, 35.47], [-83.0, 35.25], [-83.25, 35.35], [-83.5, 35.25], [-84.03, 35.47], [-84.25, 36.0], [-84.15, 36.25], [-84.25, 36.5], [-84.15, 36.75], [-84.18, 36.82], [-84.25, 36.85], [-84.5, 36.75], [-85.03, 36.97], [-85.25, 37.5], [-85.03, 38.03], [-84.68, 38.18], [-84.53, 38.53], [-84.18, 38.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.574188096818602}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.146257439587269}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.719173096076304, 10.993135408028422, 12.051701597048918]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.792076842962786, 6.573947316253054, 8.147712608399047]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.24803144399786, -6.7769662013138126, -5.413774673450132]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.323516646938174, -7.574188096818602, -5.92773780953371]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7452865094867334, -1.9041331921907076, -1.523560964327704]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.938668881418028, -2.1902076898091662, -1.675103149951431]}}