{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:45.585138", "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": "2024-Mar-10_to_2024-Mar-14_196.5_58.5"}, "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": 2024030000274}, "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": "March 10 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 14 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 54264.35197293767}, "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": ["Bering Sea"]}, "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": 58.5}, "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": 196.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "196.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 195.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 200.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-163.25, 57.35], [-163.5, 57.25], [-163.75, 57.35], [-164.0, 57.25], [-164.53, 57.47], [-164.68, 57.82], [-164.75, 57.85], [-165.0, 57.75], [-165.53, 57.97], [-165.75, 58.5], [-165.53, 59.03], [-165.18, 59.18], [-165.15, 59.25], [-165.25, 59.5], [-165.03, 60.03], [-164.68, 60.18], [-164.53, 60.53], [-164.0, 60.75], [-163.75, 60.65], [-163.5, 60.75], [-163.25, 60.65], [-163.0, 60.75], [-162.75, 60.65], [-162.5, 60.75], [-161.97, 60.53], [-161.82, 60.18], [-161.47, 60.03], [-161.32, 59.68], [-161.25, 59.65], [-161.0, 59.75], [-160.5, 59.54], [-160.0, 59.75], [-159.47, 59.53], [-159.25, 59.0], [-159.47, 58.47], [-159.82, 58.32], [-159.97, 57.97], [-160.5, 57.75], [-160.75, 57.85], [-161.0, 57.75], [-161.25, 57.85], [-161.32, 57.82], [-161.47, 57.47], [-162.0, 57.25], [-162.25, 57.35], [-162.5, 57.25], [-162.75, 57.35], [-163.0, 57.25], [-163.25, 57.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.15, 59.25], [-165.25, 59.5], [-165.03, 60.03], [-164.5, 60.25], [-164.25, 60.15], [-164.0, 60.25], [-163.75, 60.15], [-163.68, 60.18], [-163.53, 60.53], [-163.0, 60.75], [-162.47, 60.53], [-162.3, 60.13], [-162.0, 60.25], [-161.47, 60.03], [-161.25, 59.5], [-161.35, 59.25], [-161.25, 59.0], [-161.47, 58.47], [-161.82, 58.32], [-161.85, 58.25], [-161.75, 58.0], [-161.97, 57.47], [-162.5, 57.25], [-163.03, 57.47], [-163.18, 57.82], [-163.25, 57.85], [-163.5, 57.75], [-163.75, 57.85], [-164.0, 57.75], [-164.25, 57.85], [-164.5, 57.75], [-164.75, 57.85], [-165.0, 57.75], [-165.53, 57.97], [-165.75, 58.5], [-165.53, 59.03], [-165.18, 59.18], [-165.15, 59.25]]]]}, "2024-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.15, 59.25], [-165.25, 59.5], [-165.03, 60.03], [-164.68, 60.18], [-164.53, 60.53], [-164.0, 60.75], [-163.75, 60.65], [-163.5, 60.75], [-163.25, 60.65], [-163.0, 60.75], [-162.75, 60.65], [-162.5, 60.75], [-161.97, 60.53], [-161.82, 60.18], [-161.47, 60.03], [-161.32, 59.68], [-161.25, 59.65], [-161.0, 59.75], [-160.5, 59.54], [-160.0, 59.75], [-159.47, 59.53], [-159.25, 59.0], [-159.47, 58.47], [-159.82, 58.32], [-159.97, 57.97], [-160.5, 57.75], [-160.75, 57.85], [-161.0, 57.75], [-161.25, 57.85], [-161.32, 57.82], [-161.47, 57.47], [-162.0, 57.25], [-162.25, 57.35], [-162.5, 57.25], [-162.75, 57.35], [-163.0, 57.25], [-163.25, 57.35], [-163.5, 57.25], [-163.75, 57.35], [-164.0, 57.25], [-164.53, 57.47], [-164.68, 57.82], [-164.75, 57.85], [-165.0, 57.75], [-165.53, 57.97], [-165.75, 58.5], [-165.53, 59.03], [-165.18, 59.18], [-165.15, 59.25]]]]}, "2024-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.15, 59.25], [-165.25, 59.5], [-165.03, 60.03], [-164.68, 60.18], [-164.53, 60.53], [-164.0, 60.75], [-163.75, 60.65], [-163.5, 60.75], [-163.25, 60.65], [-163.0, 60.75], [-162.75, 60.65], [-162.5, 60.75], [-161.97, 60.53], [-161.82, 60.18], [-161.47, 60.03], [-161.32, 59.68], [-161.25, 59.65], [-161.0, 59.75], [-160.5, 59.54], [-160.0, 59.75], [-159.47, 59.53], [-159.25, 59.0], [-159.47, 58.47], [-159.82, 58.32], [-159.97, 57.97], [-160.5, 57.75], [-160.75, 57.85], [-161.0, 57.75], [-161.25, 57.85], [-161.32, 57.82], [-161.47, 57.47], [-162.0, 57.25], [-162.25, 57.35], [-162.5, 57.25], [-162.75, 57.35], [-163.0, 57.25], [-163.25, 57.35], [-163.5, 57.25], [-163.75, 57.35], [-164.0, 57.25], [-164.53, 57.47], [-164.68, 57.82], [-164.75, 57.85], [-165.0, 57.75], [-165.53, 57.97], [-165.75, 58.5], [-165.53, 59.03], [-165.18, 59.18], [-165.15, 59.25]]]]}, "2024-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.03, 59.53], [-164.68, 59.68], [-164.65, 59.75], [-164.75, 60.0], [-164.53, 60.53], [-164.0, 60.75], [-163.75, 60.65], [-163.5, 60.75], [-163.25, 60.65], [-163.0, 60.75], [-162.75, 60.65], [-162.5, 60.75], [-161.97, 60.53], [-161.82, 60.18], [-161.47, 60.03], [-161.32, 59.68], [-161.25, 59.65], [-161.0, 59.75], [-160.5, 59.54], [-160.0, 59.75], [-159.47, 59.53], [-159.25, 59.0], [-159.47, 58.47], [-159.82, 58.32], [-159.97, 57.97], [-160.5, 57.75], [-160.75, 57.85], [-161.0, 57.75], [-161.25, 57.85], [-161.32, 57.82], [-161.47, 57.47], [-162.0, 57.25], [-162.25, 57.35], [-162.5, 57.25], [-162.75, 57.35], [-163.0, 57.25], [-163.25, 57.35], [-163.5, 57.25], [-163.75, 57.35], [-164.0, 57.25], [-164.53, 57.47], [-164.68, 57.82], [-164.75, 57.85], [-165.0, 57.75], [-165.53, 57.97], [-165.75, 58.5], [-165.53, 59.03], [-165.18, 59.18], [-165.03, 59.53]]]]}, "2024-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-164.25, 58.5], [-164.03, 59.03], [-163.5, 59.25], [-162.97, 59.03], [-162.82, 58.68], [-162.47, 58.53], [-162.25, 58.0], [-162.47, 57.47], [-163.0, 57.25], [-163.25, 57.35], [-163.5, 57.25], [-164.03, 57.47], [-164.25, 58.0], [-164.15, 58.25], [-164.25, 58.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.531579022418214}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.884444603636002}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-15.839184541859254, -17.271701583141265, -17.827039956422027, -16.825220923140023, -13.848456977204648]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.591266732481216, -21.26104725825823, -21.68312458993765, -20.554983225536688, -14.211859772569994]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.087489342288436, -10.055453142180427, -10.55363550847355, -9.63333039821668, -8.171823826787545]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.383370677254817, -12.088004975887742, -12.531579022418214, -10.869793381626238, -8.2701125293259]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5453272843715549, -1.6343018701277765, -1.7096563719460875, -1.5436313640262025, -1.392420974077903]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.617351016190785, -1.7968780658923014, -1.924700376288636, -1.6715068698385516, -1.4110671515523265]}}