{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:20:19.519748", "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": "2020-Jun-22_to_2020-Jun-26_198.5_71.5"}, "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": 2020060000666}, "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": "June 22 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 26 2020"}, "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": 51133.821948864934}, "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": ["Arctic Ocean", "Chukchi 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": 71.5}, "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": 198.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "198.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 193.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 72.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-159.5, 72.25], [-159.25, 72.15], [-159.0, 72.25], [-158.75, 72.15], [-158.5, 72.25], [-158.25, 72.15], [-158.0, 72.25], [-157.75, 72.15], [-157.5, 72.25], [-156.97, 72.03], [-156.75, 71.5], [-156.85, 71.25], [-156.75, 71.0], [-156.97, 70.47], [-157.5, 70.25], [-157.75, 70.35], [-158.0, 70.25], [-158.53, 70.47], [-158.68, 70.82], [-158.75, 70.85], [-159.0, 70.75], [-159.25, 70.85], [-159.37, 70.8], [-159.25, 70.5], [-159.47, 69.97], [-160.0, 69.75], [-160.53, 69.97], [-160.75, 70.5], [-160.53, 71.03], [-160.12, 71.2], [-160.25, 71.5], [-160.03, 72.03], [-159.5, 72.25]]], [[[-163.75, 71.0], [-163.53, 71.53], [-163.0, 71.75], [-162.75, 71.65], [-162.68, 71.68], [-162.53, 72.03], [-162.0, 72.25], [-161.75, 72.15], [-161.5, 72.25], [-160.97, 72.03], [-160.75, 71.5], [-160.97, 70.97], [-161.32, 70.82], [-161.47, 70.47], [-162.0, 70.25], [-162.25, 70.35], [-162.5, 70.25], [-162.75, 70.35], [-163.0, 70.25], [-163.53, 70.47], [-163.75, 71.0]]]]}, "2020-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 67.97], [-166.75, 68.5], [-166.53, 69.03], [-166.0, 69.25], [-165.75, 69.15], [-165.5, 69.25], [-165.25, 69.15], [-165.0, 69.25], [-164.75, 69.15], [-164.68, 69.18], [-164.53, 69.53], [-164.0, 69.75], [-163.75, 69.65], [-163.68, 69.68], [-163.53, 70.03], [-163.0, 70.25], [-163.53, 70.47], [-163.75, 71.0], [-163.53, 71.53], [-163.0, 71.75], [-162.75, 71.65], [-162.68, 71.68], [-162.53, 72.03], [-162.0, 72.25], [-161.75, 72.15], [-161.5, 72.25], [-161.25, 72.15], [-161.18, 72.18], [-161.03, 72.53], [-160.5, 72.75], [-160.25, 72.65], [-160.0, 72.75], [-159.47, 72.53], [-159.32, 72.18], [-159.25, 72.15], [-159.0, 72.25], [-158.75, 72.15], [-158.5, 72.25], [-158.25, 72.15], [-158.0, 72.25], [-157.75, 72.15], [-157.5, 72.25], [-156.97, 72.03], [-156.75, 71.5], [-156.85, 71.25], [-156.75, 71.0], [-156.97, 70.47], [-157.5, 70.25], [-157.75, 70.35], [-158.0, 70.25], [-158.5, 70.46], [-159.0, 70.25], [-159.25, 70.35], [-159.32, 70.32], [-159.47, 69.97], [-159.82, 69.82], [-159.97, 69.47], [-160.32, 69.32], [-160.47, 68.97], [-160.82, 68.82], [-160.97, 68.47], [-161.5, 68.25], [-161.75, 68.35], [-162.0, 68.25], [-162.25, 68.35], [-162.32, 68.32], [-162.47, 67.97], [-163.0, 67.75], [-163.25, 67.85], [-163.5, 67.75], [-163.75, 67.85], [-164.0, 67.75], [-164.25, 67.85], [-164.5, 67.75], [-164.75, 67.85], [-165.0, 67.75], [-165.25, 67.85], [-165.5, 67.75], [-165.75, 67.85], [-166.0, 67.75], [-166.53, 67.97]], [[-162.75, 70.15], [-162.68, 70.18], [-162.62, 70.3], [-162.75, 70.35], [-163.0, 70.25], [-162.75, 70.15]]]]}, "2020-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 67.97], [-166.75, 68.5], [-166.53, 69.03], [-166.0, 69.25], [-165.75, 69.15], [-165.5, 69.25], [-165.25, 69.15], [-165.0, 69.25], [-164.75, 69.15], [-164.68, 69.18], [-164.53, 69.53], [-164.0, 69.75], [-163.75, 69.65], [-163.68, 69.68], [-163.53, 70.03], [-163.0, 70.25], [-163.53, 70.47], [-163.75, 71.0], [-163.53, 71.53], [-163.0, 71.75], [-162.75, 71.65], [-162.68, 71.68], [-162.53, 72.03], [-162.0, 72.25], [-161.75, 72.15], [-161.5, 72.25], [-161.25, 72.15], [-161.18, 72.18], [-161.03, 72.53], [-160.5, 72.75], [-160.25, 72.65], [-160.0, 72.75], [-159.47, 72.53], [-159.32, 72.18], [-159.25, 72.15], [-159.0, 72.25], [-158.75, 72.15], [-158.5, 72.25], [-158.25, 72.15], [-158.0, 72.25], [-157.75, 72.15], [-157.5, 72.25], [-156.97, 72.03], [-156.75, 71.5], [-156.85, 71.25], [-156.75, 71.0], [-156.97, 70.47], [-157.5, 70.25], [-157.75, 70.35], [-158.0, 70.25], [-158.5, 70.46], [-159.0, 70.25], [-159.25, 70.35], [-159.32, 70.32], [-159.47, 69.97], [-159.82, 69.82], [-159.97, 69.47], [-160.32, 69.32], [-160.47, 68.97], [-160.82, 68.82], [-160.97, 68.47], [-161.5, 68.25], [-161.75, 68.35], [-162.0, 68.25], [-162.25, 68.35], [-162.32, 68.32], [-162.47, 67.97], [-163.0, 67.75], [-163.25, 67.85], [-163.5, 67.75], [-163.75, 67.85], [-164.0, 67.75], [-164.25, 67.85], [-164.5, 67.75], [-164.75, 67.85], [-165.0, 67.75], [-165.25, 67.85], [-165.5, 67.75], [-165.75, 67.85], [-166.0, 67.75], [-166.53, 67.97]], [[-162.75, 70.15], [-162.68, 70.18], [-162.62, 70.3], [-162.75, 70.35], [-163.0, 70.25], [-162.75, 70.15]]]]}, "2020-06-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, 67.97], [-166.75, 68.5], [-166.53, 69.03], [-166.0, 69.25], [-165.75, 69.15], [-165.5, 69.25], [-165.25, 69.15], [-165.0, 69.25], [-164.75, 69.15], [-164.68, 69.18], [-164.53, 69.53], [-164.0, 69.75], [-163.75, 69.65], [-163.68, 69.68], [-163.53, 70.03], [-163.0, 70.25], [-163.53, 70.47], [-163.75, 71.0], [-163.53, 71.53], [-163.0, 71.75], [-162.75, 71.65], [-162.68, 71.68], [-162.53, 72.03], [-162.0, 72.25], [-161.75, 72.15], [-161.5, 72.25], [-161.25, 72.15], [-161.18, 72.18], [-161.03, 72.53], [-160.5, 72.75], [-160.25, 72.65], [-160.0, 72.75], [-159.47, 72.53], [-159.32, 72.18], [-158.97, 72.03], [-158.82, 71.68], [-158.47, 71.53], [-158.25, 71.0], [-158.47, 70.47], [-159.0, 70.25], [-159.25, 70.35], [-159.32, 70.32], [-159.47, 69.97], [-159.82, 69.82], [-159.97, 69.47], [-160.32, 69.32], [-160.47, 68.97], [-160.82, 68.82], [-160.97, 68.47], [-161.5, 68.25], [-161.75, 68.35], [-162.0, 68.25], [-162.25, 68.35], [-162.32, 68.32], [-162.47, 67.97], [-163.0, 67.75], [-163.25, 67.85], [-163.5, 67.75], [-163.75, 67.85], [-164.0, 67.75], [-164.25, 67.85], [-164.5, 67.75], [-164.75, 67.85], [-165.0, 67.75], [-165.25, 67.85], [-165.5, 67.75], [-165.75, 67.85], [-166.0, 67.75], [-166.53, 67.97]], [[-162.75, 70.15], [-162.68, 70.18], [-162.62, 70.3], [-162.75, 70.35], [-163.0, 70.25], [-162.75, 70.15]]]]}, "2020-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-164.25, 68.5], [-164.03, 69.03], [-163.5, 69.25], [-163.25, 69.15], [-163.0, 69.25], [-162.47, 69.03], [-162.25, 68.5], [-162.47, 67.97], [-163.0, 67.75], [-163.25, 67.85], [-163.5, 67.75], [-164.03, 67.97], [-164.25, 68.5]]], [[[-162.53, 72.03], [-162.0, 72.25], [-161.75, 72.15], [-161.5, 72.25], [-161.25, 72.15], [-161.0, 72.25], [-160.75, 72.15], [-160.5, 72.25], [-160.25, 72.15], [-160.0, 72.25], [-159.47, 72.03], [-159.32, 71.68], [-159.25, 71.65], [-159.0, 71.75], [-158.47, 71.53], [-158.25, 71.0], [-158.47, 70.47], [-159.0, 70.25], [-159.25, 70.35], [-159.32, 70.32], [-159.47, 69.97], [-160.0, 69.75], [-160.25, 69.85], [-160.5, 69.75], [-160.75, 69.85], [-161.0, 69.75], [-161.25, 69.85], [-161.5, 69.75], [-162.03, 69.97], [-162.25, 70.5], [-162.12, 70.8], [-162.53, 70.97], [-162.75, 71.5], [-162.53, 72.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.779044600581756}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.1299141112023445}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.2136864166485566, 1.0046503262875035, 0.7816196011649481, 1.1852512053705482, 0.6225737282790078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.0851200731674453, -0.3124844445011945, -1.1029731391563473, -0.9118482434096222, -0.409822545966847]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6683338226946138, -4.292468438220186, -4.563482026756013, -4.723863445100968, -2.7182445383256706]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.111158234090624, -8.779044600581756, -7.992252806689237, -7.824882316320895, -6.073508992547659]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2149309659260774, -1.5315889961328029, -1.8132505959354948, -1.6419504556170128, -1.3330576889202586]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3721898281625176, -2.0990905868165997, -2.2722819046432168, -1.9247003014771684, -1.5799211420375496]}}