{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:42.694691", "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-Oct-25_to_2020-Oct-27_249.0_43.0"}, "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": 2020100000651}, "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": "October 25 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 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": 65845.15986481286}, "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": 43.0}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 245.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 249.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.75, 43.0], [-114.53, 43.53], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.18, 43.68], [-113.15, 43.75], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.0, 44.75], [-111.75, 44.65], [-111.5, 44.75], [-111.25, 44.65], [-111.0, 44.75], [-110.47, 44.53], [-110.32, 44.18], [-109.97, 44.03], [-109.75, 43.5], [-109.85, 43.25], [-109.75, 43.0], [-109.97, 42.47], [-110.32, 42.32], [-110.35, 42.25], [-110.25, 42.0], [-110.35, 41.75], [-110.25, 41.5], [-110.47, 40.97], [-111.0, 40.75], [-111.25, 40.85], [-111.5, 40.75], [-112.0, 40.96], [-112.32, 40.82], [-112.47, 40.47], [-113.0, 40.25], [-113.53, 40.47], [-113.68, 40.82], [-114.03, 40.97], [-114.25, 41.5], [-114.04, 42.0], [-114.18, 42.32], [-114.53, 42.47], [-114.75, 43.0]]]]}, "2020-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.75, 43.0], [-114.53, 43.53], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.18, 43.68], [-113.15, 43.75], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.0, 44.75], [-111.75, 44.65], [-111.5, 44.75], [-111.25, 44.65], [-111.0, 44.75], [-110.47, 44.53], [-110.32, 44.18], [-109.97, 44.03], [-109.75, 43.5], [-109.85, 43.25], [-109.75, 43.0], [-109.97, 42.47], [-110.32, 42.32], [-110.35, 42.25], [-110.25, 42.0], [-110.35, 41.75], [-110.25, 41.5], [-110.47, 40.97], [-111.0, 40.75], [-111.25, 40.85], [-111.5, 40.75], [-112.0, 40.96], [-112.32, 40.82], [-112.47, 40.47], [-113.0, 40.25], [-113.53, 40.47], [-113.68, 40.82], [-114.03, 40.97], [-114.25, 41.5], [-114.04, 42.0], [-114.18, 42.32], [-114.53, 42.47], [-114.75, 43.0]]]]}, "2020-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-114.75, 43.0], [-114.53, 43.53], [-114.0, 43.75], [-113.75, 43.65], [-113.5, 43.75], [-113.25, 43.65], [-113.18, 43.68], [-113.15, 43.75], [-113.25, 44.0], [-113.03, 44.53], [-112.5, 44.75], [-112.25, 44.65], [-112.0, 44.75], [-111.75, 44.65], [-111.5, 44.75], [-111.25, 44.65], [-111.0, 44.75], [-110.47, 44.53], [-110.32, 44.18], [-109.97, 44.03], [-109.75, 43.5], [-109.85, 43.25], [-109.75, 43.0], [-109.97, 42.47], [-110.32, 42.32], [-110.35, 42.25], [-110.25, 42.0], [-110.35, 41.75], [-110.25, 41.5], [-110.47, 40.97], [-111.0, 40.75], [-111.25, 40.85], [-111.5, 40.75], [-112.0, 40.96], [-112.32, 40.82], [-112.47, 40.47], [-113.0, 40.25], [-113.53, 40.47], [-113.68, 40.82], [-114.03, 40.97], [-114.25, 41.5], [-114.04, 42.0], [-114.18, 42.32], [-114.53, 42.47], [-114.75, 43.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -17.216935220129244}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.359321246157613}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.0214487407165507, -7.9987192823478495, -2.886771341824158]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.807325977790299, -18.64270043501088, -10.584593408901867]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.110948614990514, -12.727197327849655, -7.239817795632668]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.001178177337692, -17.216935220129244, -9.930052431188983]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0137848624841683, -3.04783347713439, -1.7078630078832224]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.893125405835494, -4.055385865645667, -2.2899480406948083]}}