{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:46.268747", "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": "2022-Oct-30_to_2022-Nov-01_217.0_53.5"}, "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": 2022100001132}, "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 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 01 2022"}, "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": 407236.7394513972}, "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": ["Gulf of Alaska Seamount Province", "Pacific 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": 53.5}, "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": 217.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "217.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 205.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 222.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.0}, "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": [[[[-153.75, 58.65], [-153.68, 58.68], [-153.53, 59.03], [-153.12, 59.2], [-153.25, 59.5], [-153.15, 59.75], [-153.25, 60.0], [-153.03, 60.53], [-152.5, 60.75], [-151.97, 60.53], [-151.82, 60.18], [-151.47, 60.03], [-151.32, 59.68], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.5, 59.75], [-149.97, 59.53], [-149.82, 59.18], [-149.75, 59.15], [-149.5, 59.25], [-148.97, 59.03], [-148.82, 58.68], [-148.75, 58.65], [-148.5, 58.75], [-147.97, 58.53], [-147.75, 58.0], [-147.85, 57.75], [-147.75, 57.5], [-147.85, 57.25], [-147.82, 57.18], [-147.75, 57.15], [-147.5, 57.25], [-146.97, 57.03], [-146.82, 56.68], [-146.75, 56.65], [-146.5, 56.75], [-145.97, 56.53], [-145.82, 56.18], [-145.75, 56.15], [-145.5, 56.25], [-145.25, 56.15], [-145.0, 56.25], [-144.75, 56.15], [-144.5, 56.25], [-144.25, 56.15], [-144.0, 56.25], [-143.75, 56.15], [-143.5, 56.25], [-142.97, 56.03], [-142.82, 55.68], [-142.5, 55.54], [-142.0, 55.75], [-141.75, 55.65], [-141.5, 55.75], [-141.25, 55.65], [-141.0, 55.75], [-140.47, 55.53], [-140.32, 55.18], [-140.25, 55.15], [-140.0, 55.25], [-139.75, 55.15], [-139.5, 55.25], [-138.97, 55.03], [-138.82, 54.68], [-138.75, 54.65], [-138.5, 54.75], [-137.97, 54.53], [-137.82, 54.18], [-137.47, 54.03], [-137.32, 53.68], [-136.97, 53.53], [-136.75, 53.0], [-136.97, 52.47], [-137.5, 52.25], [-137.75, 52.35], [-138.0, 52.25], [-138.25, 52.35], [-138.32, 52.32], [-138.47, 51.97], [-139.0, 51.75], [-139.25, 51.85], [-139.5, 51.75], [-139.75, 51.85], [-140.0, 51.75], [-140.25, 51.85], [-140.32, 51.82], [-140.47, 51.47], [-141.0, 51.25], [-141.25, 51.35], [-141.32, 51.32], [-141.47, 50.97], [-142.0, 50.75], [-142.25, 50.85], [-142.32, 50.82], [-142.47, 50.47], [-143.0, 50.25], [-143.25, 50.35], [-143.5, 50.25], [-143.75, 50.35], [-144.0, 50.25], [-144.25, 50.35], [-144.5, 50.25], [-144.75, 50.35], [-145.0, 50.25], [-145.53, 50.47], [-145.68, 50.82], [-146.03, 50.97], [-146.18, 51.32], [-146.53, 51.47], [-146.68, 51.82], [-146.75, 51.85], [-147.0, 51.75], [-147.53, 51.97], [-147.68, 52.32], [-147.75, 52.35], [-148.0, 52.25], [-148.25, 52.35], [-148.5, 52.25], [-149.03, 52.47], [-149.25, 53.0], [-149.15, 53.25], [-149.18, 53.32], [-149.25, 53.35], [-149.5, 53.25], [-150.03, 53.47], [-150.18, 53.82], [-150.53, 53.97], [-150.75, 54.5], [-150.65, 54.75], [-150.68, 54.82], [-150.75, 54.85], [-151.0, 54.75], [-151.53, 54.97], [-151.75, 55.5], [-151.65, 55.75], [-151.68, 55.82], [-152.03, 55.97], [-152.18, 56.32], [-152.53, 56.47], [-152.68, 56.82], [-153.03, 56.97], [-153.18, 57.32], [-153.25, 57.35], [-153.5, 57.25], [-153.75, 57.35], [-153.82, 57.32], [-153.97, 56.97], [-154.5, 56.75], [-155.03, 56.97], [-155.25, 57.5], [-155.03, 58.03], [-154.68, 58.18], [-154.53, 58.53], [-154.0, 58.75], [-153.75, 58.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.53, 58.53], [-154.0, 58.75], [-153.75, 58.65], [-153.68, 58.68], [-153.53, 59.03], [-153.12, 59.2], [-153.25, 59.5], [-153.15, 59.75], [-153.25, 60.0], [-153.03, 60.53], [-152.5, 60.75], [-151.97, 60.53], [-151.82, 60.18], [-151.47, 60.03], [-151.32, 59.68], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.5, 59.75], [-149.97, 59.53], [-149.82, 59.18], [-149.75, 59.15], [-149.5, 59.25], [-148.97, 59.03], [-148.82, 58.68], [-148.75, 58.65], [-148.5, 58.75], [-147.97, 58.53], [-147.75, 58.0], [-147.85, 57.75], [-147.75, 57.5], [-147.85, 57.25], [-147.82, 57.18], [-147.75, 57.15], [-147.5, 57.25], [-146.97, 57.03], [-146.82, 56.68], [-146.75, 56.65], [-146.5, 56.75], [-145.97, 56.53], [-145.82, 56.18], [-145.75, 56.15], [-145.5, 56.25], [-145.25, 56.15], [-145.0, 56.25], [-144.75, 56.15], [-144.5, 56.25], [-144.25, 56.15], [-144.0, 56.25], [-143.75, 56.15], [-143.5, 56.25], [-142.97, 56.03], [-142.82, 55.68], [-142.5, 55.54], [-142.0, 55.75], [-141.75, 55.65], [-141.5, 55.75], [-141.25, 55.65], [-141.0, 55.75], [-140.47, 55.53], [-140.32, 55.18], [-140.25, 55.15], [-140.0, 55.25], [-139.75, 55.15], [-139.5, 55.25], [-138.97, 55.03], [-138.82, 54.68], [-138.75, 54.65], [-138.5, 54.75], [-137.97, 54.53], [-137.82, 54.18], [-137.47, 54.03], [-137.32, 53.68], [-136.97, 53.53], [-136.75, 53.0], [-136.97, 52.47], [-137.5, 52.25], [-137.75, 52.35], [-138.0, 52.25], [-138.25, 52.35], [-138.32, 52.32], [-138.47, 51.97], [-139.0, 51.75], [-139.25, 51.85], [-139.5, 51.75], [-139.75, 51.85], [-140.0, 51.75], [-140.25, 51.85], [-140.32, 51.82], [-140.47, 51.47], [-141.0, 51.25], [-141.25, 51.35], [-141.32, 51.32], [-141.47, 50.97], [-142.0, 50.75], [-142.25, 50.85], [-142.32, 50.82], [-142.47, 50.47], [-143.0, 50.25], [-143.25, 50.35], [-143.5, 50.25], [-143.75, 50.35], [-144.0, 50.25], [-144.25, 50.35], [-144.5, 50.25], [-144.75, 50.35], [-145.0, 50.25], [-145.53, 50.47], [-145.68, 50.82], [-146.03, 50.97], [-146.18, 51.32], [-146.53, 51.47], [-146.68, 51.82], [-146.75, 51.85], [-147.0, 51.75], [-147.53, 51.97], [-147.68, 52.32], [-147.75, 52.35], [-148.0, 52.25], [-148.25, 52.35], [-148.5, 52.25], [-149.03, 52.47], [-149.25, 53.0], [-149.15, 53.25], [-149.18, 53.32], [-149.25, 53.35], [-149.5, 53.25], [-150.03, 53.47], [-150.18, 53.82], [-150.53, 53.97], [-150.75, 54.5], [-150.65, 54.75], [-150.68, 54.82], [-150.75, 54.85], [-151.0, 54.75], [-151.53, 54.97], [-151.75, 55.5], [-151.65, 55.75], [-151.68, 55.82], [-152.03, 55.97], [-152.18, 56.32], [-152.53, 56.47], [-152.68, 56.82], [-153.03, 56.97], [-153.18, 57.32], [-153.25, 57.35], [-153.5, 57.25], [-153.75, 57.35], [-153.82, 57.32], [-153.97, 56.97], [-154.5, 56.75], [-155.03, 56.97], [-155.25, 57.5], [-155.03, 58.03], [-154.68, 58.18], [-154.53, 58.53]]]]}, "2022-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.53, 58.53], [-154.0, 58.75], [-153.75, 58.65], [-153.68, 58.68], [-153.53, 59.03], [-153.12, 59.2], [-153.25, 59.5], [-153.15, 59.75], [-153.25, 60.0], [-153.03, 60.53], [-152.5, 60.75], [-151.97, 60.53], [-151.82, 60.18], [-151.47, 60.03], [-151.32, 59.68], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.5, 59.75], [-149.97, 59.53], [-149.82, 59.18], [-149.75, 59.15], [-149.5, 59.25], [-148.97, 59.03], [-148.82, 58.68], [-148.75, 58.65], [-148.5, 58.75], [-147.97, 58.53], [-147.75, 58.0], [-147.85, 57.75], [-147.75, 57.5], [-147.85, 57.25], [-147.82, 57.18], [-147.75, 57.15], [-147.5, 57.25], [-146.97, 57.03], [-146.82, 56.68], [-146.75, 56.65], [-146.5, 56.75], [-145.97, 56.53], [-145.82, 56.18], [-145.75, 56.15], [-145.5, 56.25], [-145.25, 56.15], [-145.0, 56.25], [-144.75, 56.15], [-144.5, 56.25], [-144.25, 56.15], [-144.0, 56.25], [-143.75, 56.15], [-143.5, 56.25], [-142.97, 56.03], [-142.82, 55.68], [-142.5, 55.54], [-142.0, 55.75], [-141.75, 55.65], [-141.5, 55.75], [-141.25, 55.65], [-141.0, 55.75], [-140.47, 55.53], [-140.32, 55.18], [-140.25, 55.15], [-140.0, 55.25], [-139.75, 55.15], [-139.5, 55.25], [-138.97, 55.03], [-138.82, 54.68], [-138.75, 54.65], [-138.5, 54.75], [-137.97, 54.53], [-137.82, 54.18], [-137.47, 54.03], [-137.32, 53.68], [-136.97, 53.53], [-136.75, 53.0], [-136.97, 52.47], [-137.5, 52.25], [-137.75, 52.35], [-138.0, 52.25], [-138.25, 52.35], [-138.32, 52.32], [-138.47, 51.97], [-139.0, 51.75], [-139.25, 51.85], [-139.5, 51.75], [-139.75, 51.85], [-140.0, 51.75], [-140.25, 51.85], [-140.32, 51.82], [-140.47, 51.47], [-141.0, 51.25], [-141.25, 51.35], [-141.32, 51.32], [-141.47, 50.97], [-142.0, 50.75], [-142.25, 50.85], [-142.32, 50.82], [-142.47, 50.47], [-143.0, 50.25], [-143.25, 50.35], [-143.5, 50.25], [-143.75, 50.35], [-144.0, 50.25], [-144.25, 50.35], [-144.5, 50.25], [-144.75, 50.35], [-145.0, 50.25], [-145.53, 50.47], [-145.68, 50.82], [-146.03, 50.97], [-146.18, 51.32], [-146.53, 51.47], [-146.68, 51.82], [-146.75, 51.85], [-147.0, 51.75], [-147.53, 51.97], [-147.68, 52.32], [-147.75, 52.35], [-148.0, 52.25], [-148.25, 52.35], [-148.5, 52.25], [-149.03, 52.47], [-149.25, 53.0], [-149.15, 53.25], [-149.18, 53.32], [-149.25, 53.35], [-149.5, 53.25], [-150.03, 53.47], [-150.18, 53.82], [-150.53, 53.97], [-150.75, 54.5], [-150.65, 54.75], [-150.68, 54.82], [-150.75, 54.85], [-151.0, 54.75], [-151.53, 54.97], [-151.75, 55.5], [-151.65, 55.75], [-151.68, 55.82], [-152.03, 55.97], [-152.18, 56.32], [-152.53, 56.47], [-152.68, 56.82], [-153.03, 56.97], [-153.18, 57.32], [-153.25, 57.35], [-153.5, 57.25], [-153.75, 57.35], [-153.82, 57.32], [-153.97, 56.97], [-154.5, 56.75], [-155.03, 56.97], [-155.25, 57.5], [-155.03, 58.03], [-154.68, 58.18], [-154.53, 58.53]]]]}, "2022-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.53, 58.53], [-154.0, 58.75], [-153.75, 58.65], [-153.68, 58.68], [-153.53, 59.03], [-153.12, 59.2], [-153.25, 59.5], [-153.15, 59.75], [-153.25, 60.0], [-153.03, 60.53], [-152.5, 60.75], [-151.97, 60.53], [-151.82, 60.18], [-151.47, 60.03], [-151.32, 59.68], [-151.25, 59.65], [-151.0, 59.75], [-150.75, 59.65], [-150.5, 59.75], [-149.97, 59.53], [-149.82, 59.18], [-149.75, 59.15], [-149.5, 59.25], [-148.97, 59.03], [-148.82, 58.68], [-148.75, 58.65], [-148.5, 58.75], [-147.97, 58.53], [-147.75, 58.0], [-147.85, 57.75], [-147.75, 57.5], [-147.85, 57.25], [-147.82, 57.18], [-147.75, 57.15], [-147.5, 57.25], [-146.97, 57.03], [-146.82, 56.68], [-146.75, 56.65], [-146.5, 56.75], [-145.97, 56.53], [-145.82, 56.18], [-145.75, 56.15], [-145.5, 56.25], [-145.25, 56.15], [-145.0, 56.25], [-144.75, 56.15], [-144.5, 56.25], [-144.25, 56.15], [-144.0, 56.25], [-143.75, 56.15], [-143.5, 56.25], [-142.97, 56.03], [-142.82, 55.68], [-142.5, 55.54], [-142.0, 55.75], [-141.75, 55.65], [-141.5, 55.75], [-141.25, 55.65], [-141.0, 55.75], [-140.47, 55.53], [-140.32, 55.18], [-140.25, 55.15], [-140.0, 55.25], [-139.75, 55.15], [-139.5, 55.25], [-138.97, 55.03], [-138.82, 54.68], [-138.75, 54.65], [-138.5, 54.75], [-137.97, 54.53], [-137.82, 54.18], [-137.47, 54.03], [-137.32, 53.68], [-136.97, 53.53], [-136.75, 53.0], [-136.97, 52.47], [-137.5, 52.25], [-137.75, 52.35], [-138.0, 52.25], [-138.25, 52.35], [-138.32, 52.32], [-138.47, 51.97], [-139.0, 51.75], [-139.25, 51.85], [-139.5, 51.75], [-139.75, 51.85], [-140.0, 51.75], [-140.25, 51.85], [-140.32, 51.82], [-140.47, 51.47], [-141.0, 51.25], [-141.25, 51.35], [-141.32, 51.32], [-141.47, 50.97], [-142.0, 50.75], [-142.25, 50.85], [-142.32, 50.82], [-142.47, 50.47], [-143.0, 50.25], [-143.25, 50.35], [-143.5, 50.25], [-143.75, 50.35], [-144.0, 50.25], [-144.25, 50.35], [-144.5, 50.25], [-144.75, 50.35], [-145.0, 50.25], [-145.53, 50.47], [-145.68, 50.82], [-146.03, 50.97], [-146.18, 51.32], [-146.53, 51.47], [-146.68, 51.82], [-146.75, 51.85], [-147.0, 51.75], [-147.53, 51.97], [-147.68, 52.32], [-147.75, 52.35], [-148.0, 52.25], [-148.25, 52.35], [-148.5, 52.25], [-149.03, 52.47], [-149.25, 53.0], [-149.15, 53.25], [-149.18, 53.32], [-149.25, 53.35], [-149.5, 53.25], [-150.03, 53.47], [-150.18, 53.82], [-150.53, 53.97], [-150.75, 54.5], [-150.65, 54.75], [-150.68, 54.82], [-150.75, 54.85], [-151.0, 54.75], [-151.53, 54.97], [-151.75, 55.5], [-151.65, 55.75], [-151.68, 55.82], [-152.03, 55.97], [-152.18, 56.32], [-152.53, 56.47], [-152.68, 56.82], [-153.03, 56.97], [-153.18, 57.32], [-153.25, 57.35], [-153.5, 57.25], [-153.75, 57.35], [-153.82, 57.32], [-153.97, 56.97], [-154.5, 56.75], [-155.03, 56.97], [-155.25, 57.5], [-155.03, 58.03], [-154.68, 58.18], [-154.53, 58.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.223418597025955}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.624717841837047}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.570467984345441, 3.036638727514287, 4.068576907442434]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.141564504834605, -4.3315065963657275, -3.151017834290144]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.064934834493641, -4.487884353429644, -3.321334337587853]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.9701119285662685, -6.223418597025955, -5.671362990113153]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6735082434019015, -2.473557407234372, -1.7781513863371956]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1788395242769276, -3.056463432948247, -2.1265310867642273]}}