{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:22.863504", "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": "2011-Sep-15_to_2011-Sep-17_277.0_39.0"}, "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": 2011090000720}, "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 15 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2011"}, "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": 91192.39732905143}, "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": 39.0}, "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": 277.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 278.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 39.75], [-85.7, 39.62], [-85.53, 40.03], [-85.0, 40.25], [-84.75, 40.15], [-84.5, 40.25], [-84.25, 40.15], [-84.18, 40.18], [-84.03, 40.53], [-83.5, 40.75], [-83.25, 40.65], [-83.0, 40.75], [-82.75, 40.65], [-82.68, 40.68], [-82.53, 41.03], [-82.0, 41.25], [-81.75, 41.15], [-81.5, 41.25], [-80.97, 41.03], [-80.75, 40.5], [-80.85, 40.25], [-80.75, 40.0], [-80.85, 39.75], [-80.75, 39.5], [-80.85, 39.25], [-80.75, 39.0], [-80.97, 38.47], [-81.32, 38.32], [-81.47, 37.97], [-82.0, 37.75], [-82.25, 37.85], [-82.5, 37.75], [-82.75, 37.85], [-83.0, 37.75], [-83.25, 37.85], [-83.32, 37.82], [-83.47, 37.47], [-84.0, 37.25], [-84.25, 37.35], [-84.32, 37.32], [-84.47, 36.97], [-85.0, 36.75], [-85.53, 36.97], [-85.75, 37.5], [-85.65, 37.75], [-85.68, 37.82], [-85.75, 37.85], [-86.0, 37.75], [-86.25, 37.85], [-86.5, 37.75], [-87.03, 37.97], [-87.25, 38.5], [-87.03, 39.03], [-86.68, 39.18], [-86.53, 39.53], [-86.0, 39.75]]]]}, "2011-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 39.75], [-85.7, 39.62], [-85.53, 40.03], [-85.0, 40.25], [-84.75, 40.15], [-84.5, 40.25], [-84.25, 40.15], [-84.18, 40.18], [-84.03, 40.53], [-83.5, 40.75], [-83.25, 40.65], [-83.0, 40.75], [-82.75, 40.65], [-82.68, 40.68], [-82.53, 41.03], [-82.0, 41.25], [-81.75, 41.15], [-81.5, 41.25], [-80.97, 41.03], [-80.75, 40.5], [-80.85, 40.25], [-80.75, 40.0], [-80.85, 39.75], [-80.75, 39.5], [-80.85, 39.25], [-80.75, 39.0], [-80.97, 38.47], [-81.32, 38.32], [-81.47, 37.97], [-82.0, 37.75], [-82.25, 37.85], [-82.5, 37.75], [-82.75, 37.85], [-83.0, 37.75], [-83.25, 37.85], [-83.32, 37.82], [-83.47, 37.47], [-84.0, 37.25], [-84.25, 37.35], [-84.32, 37.32], [-84.47, 36.97], [-85.0, 36.75], [-85.53, 36.97], [-85.75, 37.5], [-85.65, 37.75], [-85.68, 37.82], [-85.75, 37.85], [-86.0, 37.75], [-86.25, 37.85], [-86.5, 37.75], [-87.03, 37.97], [-87.25, 38.5], [-87.03, 39.03], [-86.68, 39.18], [-86.53, 39.53], [-86.0, 39.75]]]]}, "2011-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 39.75], [-85.7, 39.62], [-85.53, 40.03], [-85.0, 40.25], [-84.75, 40.15], [-84.5, 40.25], [-84.25, 40.15], [-84.18, 40.18], [-84.03, 40.53], [-83.5, 40.75], [-83.25, 40.65], [-83.0, 40.75], [-82.75, 40.65], [-82.68, 40.68], [-82.53, 41.03], [-82.0, 41.25], [-81.75, 41.15], [-81.5, 41.25], [-80.97, 41.03], [-80.75, 40.5], [-80.85, 40.25], [-80.75, 40.0], [-80.85, 39.75], [-80.75, 39.5], [-80.85, 39.25], [-80.75, 39.0], [-80.97, 38.47], [-81.32, 38.32], [-81.47, 37.97], [-82.0, 37.75], [-82.25, 37.85], [-82.5, 37.75], [-82.75, 37.85], [-83.0, 37.75], [-83.25, 37.85], [-83.32, 37.82], [-83.47, 37.47], [-84.0, 37.25], [-84.25, 37.35], [-84.32, 37.32], [-84.47, 36.97], [-85.0, 36.75], [-85.53, 36.97], [-85.75, 37.5], [-85.65, 37.75], [-85.68, 37.82], [-85.75, 37.85], [-86.0, 37.75], [-86.25, 37.85], [-86.5, 37.75], [-87.03, 37.97], [-87.25, 38.5], [-87.03, 39.03], [-86.68, 39.18], [-86.53, 39.53], [-86.0, 39.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.112847178246284}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.231725033682507}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.751376949687199, 11.545644551131602, 14.452662043094847]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.870237170925748, 10.170302761703681, 13.190941316341139]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.180985760120279, -8.306513680673463, -5.207675660253775]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.558621973990512, -9.112847178246284, -6.052011294147746]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6546690411199843, -2.6140702080746867, -1.5697723590031234]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.023291144750781, -2.8333696564292987, -1.8872654933328334]}}