{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:52:52.472144", "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-Aug-23_to_2024-Aug-26_200.5_61.5"}, "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": 2024080000566}, "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 23 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 26 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": 76587.51395771945}, "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.W.North-America"]}, "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": ["Bering Sea"]}, "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": 61.5}, "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": 194.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.25, 61.5], [-166.03, 62.03], [-165.5, 62.25], [-165.25, 62.15], [-165.0, 62.25], [-164.47, 62.03], [-164.32, 61.68], [-163.97, 61.53], [-163.82, 61.18], [-163.75, 61.15], [-163.5, 61.25], [-163.25, 61.15], [-163.0, 61.25], [-162.75, 61.15], [-162.5, 61.25], [-162.25, 61.15], [-162.18, 61.18], [-162.03, 61.53], [-161.5, 61.75], [-161.25, 61.65], [-161.18, 61.68], [-161.03, 62.03], [-160.5, 62.25], [-160.25, 62.15], [-160.0, 62.25], [-159.75, 62.15], [-159.5, 62.25], [-159.25, 62.15], [-159.0, 62.25], [-158.47, 62.03], [-158.25, 61.5], [-158.47, 60.97], [-158.82, 60.82], [-158.85, 60.75], [-158.75, 60.5], [-158.97, 59.97], [-159.32, 59.82], [-159.47, 59.47], [-160.0, 59.25], [-160.25, 59.35], [-160.5, 59.25], [-160.75, 59.35], [-161.0, 59.25], [-161.25, 59.35], [-161.5, 59.25], [-161.75, 59.35], [-162.0, 59.25], [-162.5, 59.46], [-163.0, 59.25], [-163.25, 59.35], [-163.5, 59.25], [-164.03, 59.47], [-164.18, 59.82], [-164.5, 59.96], [-165.0, 59.75], [-165.53, 59.97], [-165.75, 60.5], [-165.62, 60.8], [-166.03, 60.97], [-166.25, 61.5]]]]}, 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59.25], [-162.25, 59.35], [-162.32, 59.32], [-162.47, 58.97], [-163.0, 58.75], [-163.53, 58.97], [-163.68, 59.32], [-164.03, 59.47], [-164.18, 59.82], [-164.5, 59.96], [-165.0, 59.75], [-165.53, 59.97], [-165.75, 60.5], [-165.62, 60.8], [-166.03, 60.97], [-166.25, 61.5]]]]}, "2024-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.25, 61.5], [-166.03, 62.03], [-165.5, 62.25], [-165.25, 62.15], [-165.0, 62.25], [-164.47, 62.03], [-164.32, 61.68], [-164.0, 61.54], [-163.5, 61.75], [-163.25, 61.65], [-163.0, 61.75], [-162.75, 61.65], [-162.68, 61.68], [-162.53, 62.03], [-162.18, 62.18], [-162.03, 62.53], [-161.5, 62.75], [-161.25, 62.65], [-161.0, 62.75], [-160.75, 62.65], [-160.5, 62.75], [-160.25, 62.65], [-160.0, 62.75], [-159.75, 62.65], [-159.5, 62.75], [-159.25, 62.65], [-159.0, 62.75], [-158.75, 62.65], [-158.5, 62.75], [-157.97, 62.53], [-157.82, 62.18], [-157.47, 62.03], [-157.25, 61.5], [-157.47, 60.97], [-157.82, 60.82], [-157.97, 60.47], [-158.5, 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"Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8983565137981486}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.868677949169637, 7.414627043923133, 7.562833219715571, 7.473297289617108]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.634477620073426, 3.808454524990111, 4.440414313931797, 4.231380857760826]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7047955692898484, -3.119190463714777, -2.831780382021333, -2.849301266420019]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.335144864758661, -3.7307509052907903, -3.35673398032651, -3.4908106299538986]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2963973024353093, -1.482386966615879, -1.366554988230861, -1.3987833993448817]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4495215259452991, -1.635865271912268, -1.5915347280450032, -1.6425608916259353]}}