{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:49.977319", "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-25_to_2024-May-27_201.5_68.0"}, "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": 2024050000673}, "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 25 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 27 2024"}, "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": 50400.34580583863}, "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": 68.0}, "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": 201.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "201.5\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": 68.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 69.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-164.25, 68.5], [-164.03, 69.03], [-163.5, 69.25], [-163.25, 69.15], [-163.0, 69.25], [-162.75, 69.15], [-162.62, 69.2], [-162.75, 69.5], [-162.53, 70.03], [-162.0, 70.25], [-161.75, 70.15], [-161.5, 70.25], [-161.25, 70.15], [-161.0, 70.25], [-160.75, 70.15], [-160.5, 70.25], [-160.25, 70.15], [-160.0, 70.25], [-159.75, 70.15], [-159.5, 70.25], [-159.25, 70.15], [-159.0, 70.25], [-158.47, 70.03], [-158.32, 69.68], [-158.25, 69.65], [-158.0, 69.75], [-157.75, 69.65], [-157.5, 69.75], [-157.25, 69.65], [-157.0, 69.75], [-156.75, 69.65], [-156.5, 69.75], [-156.25, 69.65], [-156.0, 69.75], [-155.75, 69.65], [-155.5, 69.75], [-155.25, 69.65], [-155.0, 69.75], [-154.75, 69.65], [-154.5, 69.75], [-154.25, 69.65], [-154.0, 69.75], [-153.47, 69.53], [-153.25, 69.0], [-153.47, 68.47], [-154.0, 68.25], [-154.25, 68.35], [-154.5, 68.25], [-154.75, 68.35], [-155.0, 68.25], [-155.25, 68.35], [-155.5, 68.25], [-155.75, 68.35], [-155.82, 68.32], [-155.97, 67.97], [-156.5, 67.75], [-156.75, 67.85], [-156.82, 67.82], [-156.97, 67.47], [-157.5, 67.25], [-157.75, 67.35], [-158.0, 67.25], [-158.25, 67.35], [-158.5, 67.25], [-158.75, 67.35], [-159.0, 67.25], [-159.25, 67.35], [-159.5, 67.25], [-159.75, 67.35], [-160.0, 67.25], [-160.25, 67.35], [-160.5, 67.25], [-161.03, 67.47], [-161.18, 67.82], [-161.25, 67.85], [-161.5, 67.75], [-161.75, 67.85], [-162.0, 67.75], [-162.25, 67.85], [-162.5, 67.75], [-162.75, 67.85], [-163.0, 67.75], [-163.25, 67.85], [-163.5, 67.75], [-164.03, 67.97], [-164.25, 68.5]]]]}}, "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": {"2024-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.5, 67.75], [-164.03, 67.97], [-164.25, 68.5], [-164.03, 69.03], [-163.5, 69.25], [-163.25, 69.15], [-163.0, 69.25], [-162.75, 69.15], [-162.62, 69.2], [-162.75, 69.5], [-162.53, 70.03], [-162.0, 70.25], [-161.75, 70.15], [-161.5, 70.25], [-161.25, 70.15], [-161.0, 70.25], [-160.75, 70.15], [-160.5, 70.25], [-160.25, 70.15], [-160.0, 70.25], [-159.75, 70.15], [-159.5, 70.25], [-159.25, 70.15], [-159.0, 70.25], [-158.47, 70.03], [-158.32, 69.68], [-158.25, 69.65], [-158.0, 69.75], [-157.75, 69.65], [-157.5, 69.75], [-157.25, 69.65], [-157.0, 69.75], [-156.75, 69.65], [-156.5, 69.75], [-156.25, 69.65], [-156.0, 69.75], [-155.75, 69.65], [-155.5, 69.75], [-155.25, 69.65], [-155.0, 69.75], [-154.75, 69.65], [-154.5, 69.75], [-154.25, 69.65], [-154.0, 69.75], [-153.47, 69.53], [-153.25, 69.0], [-153.47, 68.47], [-154.0, 68.25], [-154.25, 68.35], [-154.5, 68.25], [-154.75, 68.35], [-155.0, 68.25], [-155.25, 68.35], [-155.5, 68.25], [-155.75, 68.35], [-155.82, 68.32], [-155.97, 67.97], [-156.5, 67.75], [-156.75, 67.85], [-156.82, 67.82], [-156.97, 67.47], [-157.5, 67.25], [-157.75, 67.35], [-158.0, 67.25], [-158.25, 67.35], [-158.5, 67.25], [-158.75, 67.35], [-159.0, 67.25], [-159.25, 67.35], [-159.5, 67.25], [-159.75, 67.35], [-160.0, 67.25], [-160.25, 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[-5.282768184246322, -6.653869931646511, -4.689397634889474]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.64666168515421, -7.379289178004205, -5.587857491315581]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.545304516374188, -8.416578864195287, -6.921190923283689]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.329616347311011, -1.7572169255048595, -1.3749567268598966]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5053574545552453, -2.023356215179208, -1.7132811922375801]}}