{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:48.654094", "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-May-22_to_2024-May-25_200.5_59.5"}, "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": 2024050000600}, "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": "May 22 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 102746.00134057635}, "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": 59.5}, "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": 200.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "200.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 196.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 206.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-162.5, 61.25], [-162.25, 61.15], [-162.0, 61.25], [-161.75, 61.15], [-161.5, 61.25], [-161.25, 61.15], [-161.0, 61.25], [-160.5, 61.04], [-160.0, 61.25], [-159.75, 61.15], [-159.68, 61.18], [-159.53, 61.53], [-159.0, 61.75], [-158.5, 61.54], [-158.0, 61.75], [-157.47, 61.53], [-157.32, 61.18], [-157.25, 61.15], [-157.0, 61.25], [-156.75, 61.15], [-156.5, 61.25], [-156.25, 61.15], [-156.0, 61.25], [-155.75, 61.15], [-155.5, 61.25], [-154.97, 61.03], [-154.82, 60.68], [-154.75, 60.65], [-154.5, 60.75], [-154.25, 60.65], [-154.0, 60.75], [-153.47, 60.53], [-153.25, 60.0], [-153.47, 59.47], [-153.82, 59.32], [-153.85, 59.25], [-153.75, 59.0], [-153.97, 58.47], [-154.5, 58.25], [-154.75, 58.35], [-154.82, 58.32], [-154.97, 57.97], [-155.5, 57.75], [-155.75, 57.85], [-156.0, 57.75], [-156.25, 57.85], [-156.5, 57.75], [-157.03, 57.97], [-157.18, 58.32], [-157.25, 58.35], [-157.5, 58.25], [-157.75, 58.35], [-158.0, 58.25], [-158.25, 58.35], [-158.5, 58.25], [-158.75, 58.35], [-159.0, 58.25], [-159.25, 58.35], [-159.5, 58.25], [-159.75, 58.35], [-160.0, 58.25], [-160.25, 58.35], [-160.5, 58.25], [-160.75, 58.35], [-161.0, 58.25], [-161.53, 58.47], [-161.75, 59.0], [-161.65, 59.25], [-161.7, 59.38], [-162.0, 59.25], [-162.5, 59.46], [-163.0, 59.25], [-163.25, 59.35], [-163.5, 59.25], [-164.03, 59.47], [-164.25, 60.0], [-164.03, 60.53], [-163.68, 60.68], [-163.53, 61.03], [-163.0, 61.25], [-162.75, 61.15], [-162.5, 61.25]]]]}}, "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": {"2024-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.53, 61.03], [-163.0, 61.25], [-162.75, 61.15], [-162.5, 61.25], [-162.25, 61.15], [-162.0, 61.25], [-161.75, 61.15], [-161.5, 61.25], [-161.25, 61.15], [-161.0, 61.25], [-160.5, 61.04], [-160.0, 61.25], [-159.75, 61.15], [-159.68, 61.18], [-159.53, 61.53], [-159.0, 61.75], [-158.47, 61.53], [-158.32, 61.18], [-157.97, 61.03], 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[-164.03, 59.47], [-164.25, 60.0], [-164.03, 60.53], [-163.68, 60.68], [-163.53, 61.03]]]]}, "2024-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.53, 61.03], [-163.0, 61.25], [-162.75, 61.15], [-162.5, 61.25], [-162.25, 61.15], [-162.0, 61.25], [-161.75, 61.15], [-161.5, 61.25], [-161.25, 61.15], [-161.0, 61.25], [-160.5, 61.04], [-160.0, 61.25], [-159.75, 61.15], [-159.68, 61.18], [-159.53, 61.53], [-159.0, 61.75], [-158.5, 61.54], [-158.0, 61.75], [-157.47, 61.53], [-157.32, 61.18], [-157.25, 61.15], [-157.0, 61.25], [-156.75, 61.15], [-156.5, 61.25], [-156.25, 61.15], [-156.0, 61.25], [-155.75, 61.15], [-155.5, 61.25], [-154.97, 61.03], [-154.82, 60.68], [-154.75, 60.65], [-154.5, 60.75], [-154.25, 60.65], [-154.0, 60.75], [-153.47, 60.53], [-153.25, 60.0], [-153.47, 59.47], [-153.82, 59.32], [-153.85, 59.25], [-153.75, 59.0], [-153.97, 58.47], [-154.5, 58.25], [-154.75, 58.35], [-154.82, 58.32], [-154.97, 57.97], [-155.5, 57.75], [-155.75, 57.85], 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[-1.2700232958746938, -2.6082495429846517, -1.1879956995622365, -0.7673021039359469]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.621198208397841, -5.043698874390073, -4.00907422530851, -4.358603983579976]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.5365253385294295, -6.096655222407662, -4.880638029461693, -5.241408385229192]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4610614712476357, -1.9431161542573594, -1.4753803462453958, -1.5941099219024457]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7867623931123635, -2.279124848669632, -1.7593194596357047, -2.1282764972922017]}}