{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:41.212709", "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": "2010-May-21_to_2010-May-24_264.0_66.0"}, "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": 2010050000656}, "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 21 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 24 2010"}, "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": 395795.90388623497}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "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": ["Hudson Bay", "The Northwestern Passages"]}, "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": 66.0}, "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": 264.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "264.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 254.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 69.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 65.53], [-105.5, 65.75], [-105.25, 65.65], [-105.0, 65.75], [-104.75, 65.65], [-104.68, 65.68], [-104.53, 66.03], [-104.0, 66.25], [-103.75, 66.15], [-103.68, 66.18], [-103.65, 66.25], [-103.75, 66.5], [-103.53, 67.03], [-103.18, 67.18], [-103.03, 67.53], [-102.5, 67.75], [-102.25, 67.65], [-102.18, 67.68], [-102.03, 68.03], [-101.5, 68.25], [-101.25, 68.15], [-101.0, 68.25], [-100.75, 68.15], [-100.5, 68.25], [-100.25, 68.15], [-100.0, 68.25], [-99.75, 68.15], [-99.5, 68.25], [-99.25, 68.15], [-99.0, 68.25], [-98.75, 68.15], [-98.5, 68.25], [-98.25, 68.15], [-98.0, 68.25], [-97.75, 68.15], [-97.5, 68.25], [-97.25, 68.15], [-97.0, 68.25], [-96.75, 68.15], [-96.5, 68.25], [-96.25, 68.15], [-96.0, 68.25], [-95.5, 68.04], [-95.0, 68.25], [-94.75, 68.15], [-94.68, 68.18], [-94.65, 68.25], [-94.75, 68.5], [-94.65, 68.75], [-94.68, 68.82], [-95.03, 68.97], [-95.25, 69.5], [-95.03, 70.03], [-94.5, 70.25], [-93.97, 70.03], [-93.82, 69.68], [-93.75, 69.65], [-93.5, 69.75], [-93.25, 69.65], [-93.0, 69.75], [-92.75, 69.65], [-92.5, 69.75], [-91.97, 69.53], [-91.82, 69.18], [-91.47, 69.03], [-91.32, 68.68], [-91.25, 68.65], [-91.0, 68.75], [-90.75, 68.65], [-90.68, 68.68], [-90.53, 69.03], [-90.0, 69.25], [-89.47, 69.03], [-89.25, 68.5], [-89.37, 68.2], [-88.97, 68.03], [-88.75, 67.5], [-88.85, 67.25], [-88.82, 67.18], [-88.75, 67.15], [-88.5, 67.25], [-88.25, 67.15], [-88.0, 67.25], [-87.47, 67.03], [-87.32, 66.68], [-87.25, 66.65], [-87.0, 66.75], [-86.47, 66.53], [-86.25, 66.0], [-86.47, 65.47], [-86.82, 65.32], [-86.97, 64.97], [-87.5, 64.75], [-87.75, 64.85], [-87.87, 64.8], [-87.75, 64.5], [-87.97, 63.97], [-88.5, 63.75], [-88.75, 63.85], [-89.0, 63.75], [-89.25, 63.85], [-89.32, 63.82], [-89.47, 63.47], [-89.82, 63.32], [-89.97, 62.97], [-90.5, 62.75], [-90.75, 62.85], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.25, 62.35], [-92.5, 62.25], [-92.75, 62.35], [-93.0, 62.25], [-93.25, 62.35], [-93.5, 62.25], [-93.75, 62.35], [-94.0, 62.25], [-94.25, 62.35], [-94.5, 62.25], [-94.75, 62.35], [-95.0, 62.25], [-95.25, 62.35], [-95.5, 62.25], [-95.75, 62.35], [-96.0, 62.25], [-96.25, 62.35], [-96.5, 62.25], [-96.75, 62.35], [-97.0, 62.25], [-97.25, 62.35], [-97.5, 62.25], [-97.75, 62.35], [-98.0, 62.25], [-98.25, 62.35], [-98.5, 62.25], [-99.03, 62.47], [-99.18, 62.82], [-99.25, 62.85], [-99.5, 62.75], [-99.75, 62.85], [-100.0, 62.75], [-100.25, 62.85], [-100.5, 62.75], [-101.03, 62.97], [-101.18, 63.32], [-101.25, 63.35], [-101.5, 63.25], [-101.75, 63.35], [-102.0, 63.25], [-102.25, 63.35], [-102.5, 63.25], [-102.75, 63.35], [-103.0, 63.25], [-103.25, 63.35], [-103.5, 63.25], [-104.03, 63.47], [-104.18, 63.82], [-104.25, 63.85], [-104.5, 63.75], [-104.75, 63.85], [-105.0, 63.75], [-105.25, 63.85], [-105.5, 63.75], [-106.03, 63.97], [-106.25, 64.5], [-106.15, 64.75], [-106.25, 65.0], [-106.03, 65.53]]]]}, "2010-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.15, 65.25], [-106.25, 65.5], [-106.03, 66.03], [-105.5, 66.25], [-105.25, 66.15], [-105.18, 66.18], [-105.03, 66.53], [-104.5, 66.75], [-104.25, 66.65], [-104.18, 66.68], [-104.15, 66.75], [-104.25, 67.0], [-104.03, 67.53], [-103.5, 67.75], [-103.25, 67.65], [-103.0, 67.75], [-102.75, 67.65], [-102.5, 67.75], [-102.25, 67.65], [-102.18, 67.68], [-102.03, 68.03], [-101.5, 68.25], [-101.25, 68.15], [-101.0, 68.25], [-100.75, 68.15], [-100.5, 68.25], [-100.25, 68.15], [-100.0, 68.25], [-99.75, 68.15], [-99.5, 68.25], [-99.25, 68.15], [-99.0, 68.25], [-98.75, 68.15], [-98.5, 68.25], [-98.25, 68.15], [-98.0, 68.25], [-97.75, 68.15], [-97.5, 68.25], [-97.25, 68.15], [-97.0, 68.25], [-96.75, 68.15], [-96.5, 68.25], [-96.25, 68.15], [-96.0, 68.25], [-95.5, 68.04], [-95.0, 68.25], [-94.75, 68.15], [-94.68, 68.18], [-94.65, 68.25], [-94.75, 68.5], [-94.65, 68.75], [-94.68, 68.82], [-95.03, 68.97], [-95.25, 69.5], [-95.03, 70.03], [-94.5, 70.25], [-93.97, 70.03], [-93.82, 69.68], [-93.75, 69.65], [-93.5, 69.75], [-93.25, 69.65], [-93.0, 69.75], [-92.75, 69.65], [-92.5, 69.75], [-91.97, 69.53], [-91.82, 69.18], [-91.47, 69.03], [-91.32, 68.68], [-91.25, 68.65], [-91.0, 68.75], [-90.75, 68.65], [-90.68, 68.68], [-90.53, 69.03], [-90.0, 69.25], [-89.47, 69.03], [-89.25, 68.5], [-89.37, 68.2], [-89.25, 68.15], [-89.0, 68.25], [-88.5, 68.04], [-88.0, 68.25], [-87.47, 68.03], [-87.25, 67.5], [-87.35, 67.25], [-87.25, 67.0], [-87.35, 66.75], [-87.32, 66.68], [-87.25, 66.65], [-87.0, 66.75], [-86.47, 66.53], [-86.25, 66.0], [-86.47, 65.47], [-86.82, 65.32], [-86.97, 64.97], [-87.5, 64.75], [-87.75, 64.85], [-87.87, 64.8], [-87.75, 64.5], [-87.97, 63.97], [-88.5, 63.75], [-88.75, 63.85], [-89.0, 63.75], [-89.25, 63.85], [-89.32, 63.82], [-89.47, 63.47], [-89.82, 63.32], [-89.97, 62.97], [-90.5, 62.75], [-90.75, 62.85], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.25, 62.35], [-92.5, 62.25], [-92.75, 62.35], [-93.0, 62.25], [-93.25, 62.35], [-93.5, 62.25], [-93.75, 62.35], [-94.0, 62.25], [-94.25, 62.35], [-94.5, 62.25], [-94.75, 62.35], [-95.0, 62.25], [-95.25, 62.35], [-95.5, 62.25], [-95.75, 62.35], [-96.0, 62.25], [-96.25, 62.35], [-96.5, 62.25], [-96.75, 62.35], [-97.0, 62.25], [-97.25, 62.35], [-97.5, 62.25], [-97.75, 62.35], [-98.0, 62.25], [-98.25, 62.35], [-98.5, 62.25], [-99.03, 62.47], [-99.18, 62.82], [-99.25, 62.85], [-99.5, 62.75], [-99.75, 62.85], [-100.0, 62.75], [-100.25, 62.85], [-100.5, 62.75], [-101.03, 62.97], [-101.18, 63.32], [-101.25, 63.35], [-101.5, 63.25], [-101.75, 63.35], [-102.0, 63.25], [-102.25, 63.35], [-102.5, 63.25], [-102.75, 63.35], [-103.0, 63.25], [-103.25, 63.35], [-103.5, 63.25], [-104.03, 63.47], [-104.18, 63.82], [-104.25, 63.85], [-104.5, 63.75], [-104.75, 63.85], [-105.0, 63.75], [-105.25, 63.85], [-105.5, 63.75], [-106.03, 63.97], [-106.25, 64.5], [-106.15, 64.75], [-106.25, 65.0], [-106.15, 65.25]]]]}, "2010-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.15, 65.25], [-106.25, 65.5], [-106.03, 66.03], [-105.5, 66.25], [-105.25, 66.15], [-105.18, 66.18], [-105.03, 66.53], [-104.5, 66.75], [-104.25, 66.65], [-104.18, 66.68], [-104.15, 66.75], [-104.25, 67.0], [-104.03, 67.53], [-103.5, 67.75], [-103.25, 67.65], [-103.0, 67.75], [-102.75, 67.65], [-102.5, 67.75], [-102.25, 67.65], [-102.18, 67.68], [-102.03, 68.03], [-101.5, 68.25], [-101.25, 68.15], [-101.0, 68.25], [-100.75, 68.15], [-100.5, 68.25], [-100.25, 68.15], [-100.0, 68.25], [-99.75, 68.15], [-99.5, 68.25], [-99.25, 68.15], [-99.0, 68.25], [-98.75, 68.15], [-98.5, 68.25], [-98.25, 68.15], [-98.0, 68.25], [-97.75, 68.15], [-97.5, 68.25], [-97.25, 68.15], [-97.0, 68.25], [-96.75, 68.15], [-96.5, 68.25], [-96.25, 68.15], [-96.0, 68.25], [-95.5, 68.04], [-95.0, 68.25], [-94.75, 68.15], [-94.68, 68.18], [-94.65, 68.25], [-94.75, 68.5], [-94.65, 68.75], [-94.68, 68.82], [-95.03, 68.97], [-95.25, 69.5], [-95.03, 70.03], [-94.5, 70.25], [-93.97, 70.03], [-93.82, 69.68], [-93.75, 69.65], [-93.5, 69.75], [-93.25, 69.65], [-93.0, 69.75], [-92.75, 69.65], [-92.5, 69.75], [-91.97, 69.53], [-91.82, 69.18], [-91.47, 69.03], [-91.32, 68.68], [-91.25, 68.65], [-91.0, 68.75], [-90.75, 68.65], [-90.68, 68.68], [-90.53, 69.03], [-90.0, 69.25], [-89.47, 69.03], [-89.25, 68.5], [-89.37, 68.2], [-89.25, 68.15], [-89.0, 68.25], [-88.5, 68.04], [-88.0, 68.25], [-87.47, 68.03], [-87.25, 67.5], [-87.35, 67.25], [-87.25, 67.0], [-87.35, 66.75], [-87.32, 66.68], [-87.25, 66.65], [-87.0, 66.75], [-86.47, 66.53], [-86.25, 66.0], [-86.47, 65.47], [-86.82, 65.32], [-86.97, 64.97], [-87.5, 64.75], [-87.75, 64.85], [-87.87, 64.8], [-87.75, 64.5], [-87.97, 63.97], [-88.5, 63.75], [-88.75, 63.85], [-89.0, 63.75], [-89.25, 63.85], [-89.32, 63.82], [-89.47, 63.47], [-89.82, 63.32], [-89.97, 62.97], [-90.5, 62.75], [-90.75, 62.85], [-90.82, 62.82], [-90.97, 62.47], [-91.5, 62.25], [-91.75, 62.35], [-92.0, 62.25], [-92.25, 62.35], [-92.5, 62.25], [-92.75, 62.35], [-93.0, 62.25], [-93.25, 62.35], [-93.5, 62.25], [-93.75, 62.35], [-94.0, 62.25], [-94.25, 62.35], [-94.5, 62.25], [-94.75, 62.35], [-95.0, 62.25], [-95.25, 62.35], [-95.5, 62.25], [-95.75, 62.35], [-96.0, 62.25], [-96.25, 62.35], [-96.5, 62.25], [-96.75, 62.35], [-97.0, 62.25], [-97.25, 62.35], [-97.5, 62.25], [-97.75, 62.35], [-98.0, 62.25], [-98.25, 62.35], [-98.5, 62.25], [-99.03, 62.47], [-99.18, 62.82], [-99.25, 62.85], [-99.5, 62.75], [-99.75, 62.85], [-100.0, 62.75], [-100.25, 62.85], [-100.5, 62.75], [-101.03, 62.97], [-101.18, 63.32], [-101.25, 63.35], [-101.5, 63.25], [-101.75, 63.35], [-102.0, 63.25], [-102.25, 63.35], [-102.5, 63.25], [-102.75, 63.35], [-103.0, 63.25], [-103.25, 63.35], [-103.5, 63.25], [-104.03, 63.47], [-104.18, 63.82], [-104.25, 63.85], [-104.5, 63.75], [-104.75, 63.85], [-105.0, 63.75], [-105.25, 63.85], [-105.5, 63.75], [-106.03, 63.97], [-106.25, 64.5], [-106.15, 64.75], [-106.25, 65.0], [-106.15, 65.25]]]]}, "2010-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 66.03], [-105.5, 66.25], [-105.25, 66.15], [-105.18, 66.18], [-105.03, 66.53], [-104.5, 66.75], [-104.25, 66.65], [-104.18, 66.68], [-104.15, 66.75], [-104.25, 67.0], [-104.03, 67.53], [-103.5, 67.75], [-103.25, 67.65], [-103.0, 67.75], [-102.75, 67.65], [-102.5, 67.75], [-102.25, 67.65], [-102.18, 67.68], [-102.03, 68.03], [-101.5, 68.25], [-101.25, 68.15], [-101.0, 68.25], [-100.75, 68.15], [-100.5, 68.25], [-100.25, 68.15], [-100.0, 68.25], [-99.75, 68.15], [-99.5, 68.25], [-99.25, 68.15], [-99.0, 68.25], [-98.75, 68.15], [-98.5, 68.25], [-98.25, 68.15], [-98.0, 68.25], [-97.75, 68.15], [-97.5, 68.25], [-97.25, 68.15], [-97.0, 68.25], [-96.75, 68.15], [-96.5, 68.25], [-96.25, 68.15], [-96.0, 68.25], [-95.5, 68.04], [-95.0, 68.25], [-94.75, 68.15], [-94.68, 68.18], [-94.65, 68.25], [-94.75, 68.5], [-94.53, 69.03], [-94.0, 69.25], [-93.75, 69.15], [-93.5, 69.25], [-93.25, 69.15], [-93.0, 69.25], [-92.75, 69.15], [-92.5, 69.25], [-92.25, 69.15], [-92.0, 69.25], [-91.47, 69.03], [-91.32, 68.68], [-91.25, 68.65], [-91.0, 68.75], [-90.75, 68.65], [-90.5, 68.75], [-89.97, 68.53], [-89.82, 68.18], [-89.75, 68.15], [-89.5, 68.25], [-89.25, 68.15], [-89.0, 68.25], [-88.5, 68.04], [-88.0, 68.25], [-87.47, 68.03], [-87.25, 67.5], [-87.35, 67.25], [-87.25, 67.0], [-87.47, 66.47], [-88.0, 66.25], [-88.53, 66.47], [-88.7, 66.88], [-88.82, 66.82], [-88.85, 66.75], [-88.75, 66.5], [-88.97, 65.97], [-89.5, 65.75], [-89.75, 65.85], [-90.0, 65.75], [-90.25, 65.85], [-90.5, 65.75], [-91.03, 65.97], [-91.18, 66.32], [-91.25, 66.35], [-91.32, 66.32], [-91.47, 65.97], [-92.0, 65.75], [-92.25, 65.85], [-92.5, 65.75], [-92.75, 65.85], [-93.0, 65.75], [-93.25, 65.85], [-93.5, 65.75], [-94.0, 65.96], [-94.5, 65.75], [-94.75, 65.85], [-95.0, 65.75], [-95.25, 65.85], [-95.32, 65.82], [-95.47, 65.47], [-95.87, 65.3], [-95.75, 65.0], [-95.97, 64.47], [-96.5, 64.25], [-96.75, 64.35], [-97.0, 64.25], [-97.25, 64.35], [-97.32, 64.32], [-97.47, 63.97], [-97.82, 63.82], [-97.97, 63.47], [-98.5, 63.25], [-99.03, 63.47], [-99.18, 63.82], [-99.25, 63.85], [-99.5, 63.75], [-99.75, 63.85], [-100.0, 63.75], [-100.5, 63.96], [-101.0, 63.75], [-101.25, 63.85], [-101.5, 63.75], [-101.75, 63.85], [-102.0, 63.75], [-102.25, 63.85], [-102.5, 63.75], [-102.75, 63.85], [-103.0, 63.75], [-103.25, 63.85], [-103.5, 63.75], [-103.75, 63.85], [-104.0, 63.75], [-104.53, 63.97], [-104.68, 64.32], [-104.75, 64.35], [-105.0, 64.25], [-105.25, 64.35], [-105.5, 64.25], [-106.03, 64.47], [-106.25, 65.0], [-106.15, 65.25], [-106.25, 65.5], [-106.03, 66.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.118122328157995}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.508389533535796}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.065359907686684, -9.986052467044942, -9.261398362308967, -8.882461373180547]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.56880237386332, -12.463023850630577, -11.857433566920236, -10.894387666148475]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.639039389892725, -5.861172528198612, -5.377718565041909, -4.847111096071149]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.137381278396958, -8.118122328157995, -7.175644236456208, -5.540287298585099]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6936092670674154, -1.8217015462165786, -1.6976001484089895, -1.518510388654225]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.092359201397125, -2.4616187635945592, -2.3357849547669285, -1.7485534118990933]}}