{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:11.855201", "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": "2023-Jul-07_to_2023-Jul-11_202.0_61.0"}, "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": 2023070000245}, "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": "July 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 11 2023"}, "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": 83561.45237904978}, "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": []}, "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": 61.0}, "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": 202.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "202.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 198.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 204.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-160.18, 60.82], [-160.53, 60.97], [-160.68, 61.32], [-161.03, 61.47], [-161.18, 61.82], [-161.25, 61.85], [-161.5, 61.75], [-162.03, 61.97], [-162.25, 62.5], [-162.15, 62.75], [-162.25, 63.0], [-162.03, 63.53], [-161.5, 63.75], [-161.25, 63.65], [-161.0, 63.75], [-160.75, 63.65], [-160.68, 63.68], [-160.53, 64.03], [-160.0, 64.25], [-159.75, 64.15], [-159.5, 64.25], [-158.97, 64.03], [-158.82, 63.68], [-158.75, 63.65], [-158.5, 63.75], [-158.25, 63.65], [-158.0, 63.75], [-157.75, 63.65], [-157.68, 63.68], [-157.53, 64.03], [-157.18, 64.18], [-157.03, 64.53], [-156.5, 64.75], [-156.25, 64.65], [-156.0, 64.75], [-155.47, 64.53], [-155.25, 64.0], [-155.37, 63.7], [-154.97, 63.53], [-154.75, 63.0], [-154.97, 62.47], [-155.32, 62.32], [-155.47, 61.97], [-155.82, 61.82], [-155.96, 61.5], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-158.75, 59.85], [-159.0, 59.75], [-159.25, 59.85], [-159.5, 59.75], [-160.03, 59.97], [-160.25, 60.5], [-160.15, 60.75], [-160.18, 60.82]]]]}}, "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": {"2023-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-159.0, 59.75], [-159.53, 59.97], [-159.75, 60.5], [-159.53, 61.03], [-159.0, 61.25], [-158.75, 61.15], [-158.68, 61.18], [-158.53, 61.53], [-158.0, 61.75], [-157.75, 61.65], [-157.5, 61.75], [-157.25, 61.65], [-157.0, 61.75], [-156.75, 61.65], [-156.5, 61.75], [-155.97, 61.53], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-158.75, 59.85], [-159.0, 59.75]]]]}, "2023-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.25, 63.0], [-162.03, 63.53], [-161.5, 63.75], [-161.25, 63.65], [-161.0, 63.75], [-160.75, 63.65], [-160.68, 63.68], [-160.53, 64.03], [-160.0, 64.25], [-159.75, 64.15], [-159.5, 64.25], [-158.97, 64.03], [-158.82, 63.68], [-158.75, 63.65], [-158.5, 63.75], [-158.25, 63.65], [-158.0, 63.75], [-157.75, 63.65], [-157.68, 63.68], [-157.53, 64.03], [-157.18, 64.18], [-157.03, 64.53], [-156.5, 64.75], [-156.25, 64.65], [-156.0, 64.75], [-155.47, 64.53], [-155.25, 64.0], [-155.37, 63.7], [-154.97, 63.53], [-154.75, 63.0], [-154.97, 62.47], [-155.32, 62.32], [-155.47, 61.97], [-155.82, 61.82], [-155.96, 61.5], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-158.75, 59.85], [-159.0, 59.75], [-159.53, 59.97], [-159.68, 60.32], [-160.03, 60.47], [-160.18, 60.82], [-160.53, 60.97], [-160.68, 61.32], [-161.03, 61.47], [-161.18, 61.82], [-161.25, 61.85], [-161.5, 61.75], [-162.03, 61.97], [-162.25, 62.5], [-162.15, 62.75], [-162.25, 63.0]]]]}, "2023-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.25, 63.0], [-162.03, 63.53], [-161.5, 63.75], [-161.25, 63.65], [-161.0, 63.75], [-160.75, 63.65], [-160.68, 63.68], [-160.53, 64.03], [-160.0, 64.25], [-159.75, 64.15], [-159.5, 64.25], [-158.97, 64.03], [-158.82, 63.68], [-158.75, 63.65], [-158.5, 63.75], [-158.25, 63.65], [-158.0, 63.75], [-157.75, 63.65], [-157.68, 63.68], [-157.53, 64.03], [-157.18, 64.18], [-157.03, 64.53], [-156.5, 64.75], [-156.25, 64.65], [-156.0, 64.75], [-155.47, 64.53], [-155.25, 64.0], [-155.37, 63.7], [-154.97, 63.53], [-154.75, 63.0], [-154.97, 62.47], [-155.32, 62.32], [-155.47, 61.97], [-155.82, 61.82], [-155.96, 61.5], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-158.75, 59.85], [-159.0, 59.75], [-159.25, 59.85], [-159.5, 59.75], [-160.03, 59.97], [-160.25, 60.5], [-160.15, 60.75], [-160.18, 60.82], [-160.53, 60.97], [-160.68, 61.32], [-161.03, 61.47], [-161.18, 61.82], [-161.25, 61.85], [-161.5, 61.75], [-162.03, 61.97], [-162.25, 62.5], [-162.15, 62.75], [-162.25, 63.0]]]]}, "2023-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.25, 63.0], [-162.03, 63.53], [-161.5, 63.75], [-161.25, 63.65], [-161.0, 63.75], [-160.75, 63.65], [-160.68, 63.68], [-160.53, 64.03], [-160.0, 64.25], [-159.75, 64.15], [-159.5, 64.25], [-158.97, 64.03], [-158.82, 63.68], [-158.75, 63.65], [-158.5, 63.75], [-158.25, 63.65], [-158.0, 63.75], [-157.75, 63.65], [-157.68, 63.68], [-157.53, 64.03], [-157.18, 64.18], [-157.03, 64.53], [-156.5, 64.75], [-156.25, 64.65], [-156.0, 64.75], [-155.47, 64.53], [-155.25, 64.0], [-155.37, 63.7], [-154.97, 63.53], [-154.75, 63.0], [-154.97, 62.47], [-155.32, 62.32], [-155.47, 61.97], [-155.82, 61.82], [-155.96, 61.5], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-158.75, 59.85], [-159.0, 59.75], [-159.25, 59.85], [-159.5, 59.75], [-160.03, 59.97], [-160.25, 60.5], [-160.15, 60.75], [-160.18, 60.82], [-160.53, 60.97], [-160.68, 61.32], [-161.03, 61.47], [-161.18, 61.82], [-161.25, 61.85], [-161.5, 61.75], [-162.03, 61.97], [-162.25, 62.5], [-162.15, 62.75], [-162.25, 63.0]]]]}, "2023-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-160.25, 61.0], [-160.15, 61.25], [-160.25, 61.5], [-160.15, 61.75], [-160.25, 62.0], [-160.03, 62.53], [-159.5, 62.75], [-159.25, 62.65], [-159.18, 62.68], [-159.03, 63.03], [-158.68, 63.18], [-158.53, 63.53], [-158.0, 63.75], [-157.75, 63.65], [-157.68, 63.68], [-157.53, 64.03], [-157.0, 64.25], [-156.75, 64.15], [-156.68, 64.18], [-156.53, 64.53], [-156.0, 64.75], [-155.47, 64.53], [-155.25, 64.0], [-155.37, 63.7], [-154.97, 63.53], [-154.75, 63.0], [-154.97, 62.47], [-155.32, 62.32], [-155.47, 61.97], [-155.82, 61.82], [-155.96, 61.5], [-155.75, 61.0], [-155.97, 60.47], [-156.5, 60.25], [-156.75, 60.35], [-157.0, 60.25], [-157.25, 60.35], [-157.32, 60.32], [-157.47, 59.97], [-158.0, 59.75], [-158.25, 59.85], [-158.5, 59.75], [-159.0, 59.96], [-159.5, 59.75], [-160.03, 59.97], [-160.25, 60.5], [-160.15, 60.75], [-160.25, 61.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.791416551142447}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.337265183803054}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.379593962893068, 10.229648974201893, 10.119322623842436, 10.000390829474838, 10.482855127026994]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.4461955830445845, 7.870748178068993, 6.7874529571507765, 6.38427352900618, 6.952783135193556]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.189656088851881, -4.392921673061527, -4.453546059625881, -4.488279096165874, -3.8729953433334963]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.485329588668378, -5.791416551142447, -5.217503096949258, -5.147747563842529, -4.299111845164646]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3393191375801512, -1.4382627006258384, -1.4782759661618334, -1.504622296529729, -1.3157253423042967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3832113523576874, -1.9599178941186612, -1.7089452769906792, -1.6500896692279772, -1.515709093150923]}}