{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:08.879169", "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-Aug-18_to_2011-Aug-22_201.0_21.5"}, "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": 2011080001021}, "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": "August 18 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 22 2011"}, "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": 94744.12610902435}, "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": ["N.Pacific-Ocean"]}, "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": ["North 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": 21.5}, "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": 201.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "201.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 197.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 205.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-158.0, 22.25], [-157.47, 22.03], [-157.25, 21.5], [-157.47, 20.97], [-158.0, 20.75], [-158.53, 20.97], [-158.75, 21.5], [-158.53, 22.03], [-158.0, 22.25]]]]}, "2011-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-159.5, 22.75], [-159.25, 22.65], [-159.0, 22.75], [-158.75, 22.65], [-158.68, 22.68], [-158.53, 23.03], [-158.0, 23.25], [-157.75, 23.15], [-157.5, 23.25], [-157.25, 23.15], [-157.0, 23.25], [-156.75, 23.15], [-156.5, 23.25], [-156.25, 23.15], [-156.0, 23.25], [-155.75, 23.15], [-155.5, 23.25], [-155.25, 23.15], [-155.0, 23.25], [-154.75, 23.15], [-154.5, 23.25], [-153.97, 23.03], [-153.75, 22.5], [-153.97, 21.97], [-154.5, 21.75], [-154.75, 21.85], [-154.82, 21.82], [-154.97, 21.47], [-155.5, 21.25], [-155.75, 21.35], [-156.0, 21.25], [-156.25, 21.35], [-156.32, 21.32], [-156.47, 20.97], [-157.0, 20.75], [-157.25, 20.85], [-157.32, 20.82], [-157.47, 20.47], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-159.03, 20.47], [-159.18, 20.82], [-159.25, 20.85], [-159.5, 20.75], [-159.75, 20.85], [-160.0, 20.75], [-160.53, 20.97], [-160.75, 21.5], [-160.53, 22.03], [-160.18, 22.18], [-160.03, 22.53], [-159.5, 22.75]]]]}, "2011-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 20.47], [-162.75, 21.0], [-162.53, 21.53], [-162.0, 21.75], [-161.75, 21.65], [-161.5, 21.75], [-161.25, 21.65], [-161.0, 21.75], [-160.75, 21.65], [-160.68, 21.68], [-160.53, 22.03], [-160.18, 22.18], [-160.03, 22.53], [-159.5, 22.75], [-159.25, 22.65], [-159.0, 22.75], [-158.75, 22.65], [-158.68, 22.68], [-158.53, 23.03], [-158.0, 23.25], [-157.75, 23.15], [-157.5, 23.25], [-157.25, 23.15], [-157.0, 23.25], [-156.75, 23.15], [-156.5, 23.25], [-156.25, 23.15], [-156.0, 23.25], [-155.75, 23.15], [-155.5, 23.25], [-155.25, 23.15], [-155.0, 23.25], [-154.75, 23.15], [-154.5, 23.25], [-153.97, 23.03], [-153.75, 22.5], [-153.97, 21.97], [-154.5, 21.75], [-154.75, 21.85], [-154.82, 21.82], [-154.97, 21.47], [-155.5, 21.25], [-155.75, 21.35], [-156.0, 21.25], [-156.25, 21.35], [-156.32, 21.32], [-156.47, 20.97], [-157.0, 20.75], [-157.25, 20.85], [-157.32, 20.82], [-157.47, 20.47], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-158.75, 20.35], [-159.0, 20.25], [-159.25, 20.35], [-159.5, 20.25], [-159.75, 20.35], [-160.0, 20.25], [-160.25, 20.35], [-160.5, 20.25], [-160.75, 20.35], [-161.0, 20.25], [-161.25, 20.35], [-161.5, 20.25], [-161.75, 20.35], [-162.0, 20.25], [-162.53, 20.47]]]]}, "2011-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 20.47], [-162.75, 21.0], [-162.53, 21.53], [-162.0, 21.75], [-161.75, 21.65], [-161.5, 21.75], [-161.25, 21.65], [-161.0, 21.75], [-160.75, 21.65], [-160.68, 21.68], [-160.53, 22.03], [-160.18, 22.18], [-160.03, 22.53], [-159.5, 22.75], [-159.25, 22.65], [-159.0, 22.75], [-158.75, 22.65], [-158.68, 22.68], [-158.53, 23.03], [-158.0, 23.25], [-157.75, 23.15], [-157.5, 23.25], [-157.25, 23.15], [-157.0, 23.25], [-156.75, 23.15], [-156.5, 23.25], [-156.25, 23.15], [-156.0, 23.25], [-155.75, 23.15], [-155.5, 23.25], [-155.25, 23.15], [-155.0, 23.25], [-154.75, 23.15], [-154.5, 23.25], [-153.97, 23.03], [-153.75, 22.5], [-153.97, 21.97], [-154.5, 21.75], [-154.75, 21.85], [-154.82, 21.82], [-154.97, 21.47], [-155.5, 21.25], [-155.75, 21.35], [-156.0, 21.25], [-156.25, 21.35], [-156.32, 21.32], [-156.47, 20.97], [-157.0, 20.75], [-157.25, 20.85], [-157.32, 20.82], [-157.47, 20.47], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-158.75, 20.35], [-159.0, 20.25], [-159.25, 20.35], [-159.5, 20.25], [-159.75, 20.35], [-160.0, 20.25], [-160.25, 20.35], [-160.5, 20.25], [-160.75, 20.35], [-161.0, 20.25], [-161.25, 20.35], [-161.5, 20.25], [-161.75, 20.35], [-162.0, 20.25], [-162.53, 20.47]]]]}, "2011-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 20.47], [-162.75, 21.0], [-162.53, 21.53], [-162.0, 21.75], [-161.75, 21.65], [-161.5, 21.75], [-161.25, 21.65], [-161.0, 21.75], [-160.75, 21.65], [-160.5, 21.75], [-160.25, 21.65], [-160.18, 21.68], [-160.03, 22.03], [-159.5, 22.25], [-159.25, 22.15], [-159.0, 22.25], [-158.75, 22.15], [-158.5, 22.25], [-158.25, 22.15], [-158.0, 22.25], [-157.47, 22.03], [-157.25, 21.5], [-157.47, 20.97], [-158.0, 20.75], [-158.25, 20.85], [-158.32, 20.82], [-158.47, 20.47], [-159.0, 20.25], [-159.25, 20.35], [-159.5, 20.25], [-159.75, 20.35], [-160.0, 20.25], [-160.25, 20.35], [-160.5, 20.25], [-160.75, 20.35], [-161.0, 20.25], [-161.25, 20.35], [-161.5, 20.25], [-161.75, 20.35], [-162.0, 20.25], [-162.53, 20.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4617376749693562}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0218940449790581}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.47473055922717, 24.377234104797935, 24.42699158994469, 24.48913344454064, 25.196871771414067]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.47473055922717, 23.452930332439337, 23.244128726918177, 23.241232057246123, 24.59655161154285]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0593593180439598, -0.9822358555523902, -1.098320529336673, -1.0483105562228126, -0.803696662904811]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0593593180439598, -1.295044436639671, -1.4446396232915504, -1.4617376749693562, -0.9451680055854581]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3688022629244259, -1.670039733078758, -1.9071883662677265, -1.809865755686105, -1.4034307849883059]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3688022629244259, -2.206435683575368, -2.5104435521842525, -2.3360303994044407, -1.4914910210613543]}}