{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:55.747907", "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": "2016-Mar-29_to_2016-Apr-04_272.5_73.5"}, "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": 2016030000706}, "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": "March 29 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 93908.59283161396}, "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"]}, "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": ["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": 73.5}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 270.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 67.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 72.97], [-88.25, 73.5], [-88.03, 74.03], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.47, 74.03], [-86.25, 73.5], [-86.47, 72.97], [-87.0, 72.75], [-87.25, 72.85], [-87.5, 72.75], [-88.03, 72.97]]]]}, "2016-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 72.97], [-88.25, 73.5], [-88.03, 74.03], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.47, 74.03], [-86.25, 73.5], [-86.47, 72.97], [-87.0, 72.75], [-87.25, 72.85], [-87.5, 72.75], [-88.03, 72.97]]]]}, "2016-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.25, 71.0], [-85.03, 71.53], [-84.5, 71.75], [-84.25, 71.65], [-84.0, 71.75], [-83.47, 71.53], [-83.25, 71.0], [-83.47, 70.47], [-84.0, 70.25], [-84.25, 70.35], [-84.5, 70.25], [-85.03, 70.47], [-85.25, 71.0]]], [[[-89.68, 73.18], [-89.53, 73.53], [-89.0, 73.75], [-88.47, 73.53], [-88.25, 73.0], [-88.37, 72.7], [-87.97, 72.53], [-87.75, 72.0], [-87.97, 71.47], [-88.32, 71.32], [-88.47, 70.97], [-89.0, 70.75], [-89.53, 70.97], [-89.75, 71.5], [-89.65, 71.75], [-89.68, 71.82], [-90.03, 71.97], [-90.25, 72.5], [-90.03, 73.03], [-89.68, 73.18]]], [[[-88.03, 74.03], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.75, 74.15], [-86.5, 74.25], [-85.97, 74.03], [-85.75, 73.5], [-85.97, 72.97], [-86.5, 72.75], [-86.75, 72.85], [-87.0, 72.75], [-87.25, 72.85], [-87.5, 72.75], [-88.03, 72.97], [-88.25, 73.5], [-88.03, 74.03]]]]}, "2016-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.25, 72.5], [-90.03, 73.03], [-89.68, 73.18], [-89.53, 73.53], [-89.18, 73.68], [-89.03, 74.03], [-88.5, 74.25], [-88.25, 74.15], [-88.0, 74.25], [-87.75, 74.15], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.75, 74.15], [-86.5, 74.25], [-86.25, 74.15], [-86.0, 74.25], [-85.47, 74.03], [-85.25, 73.5], [-85.47, 72.97], [-86.0, 72.75], [-86.25, 72.85], [-86.32, 72.82], [-86.37, 72.7], [-86.0, 72.54], [-85.5, 72.75], [-85.25, 72.65], [-85.0, 72.75], [-84.75, 72.65], [-84.5, 72.75], [-83.97, 72.53], [-83.82, 72.18], [-83.47, 72.03], [-83.25, 71.5], [-83.35, 71.25], [-83.25, 71.0], [-83.35, 70.75], [-83.25, 70.5], [-83.37, 70.2], [-83.25, 70.15], [-83.0, 70.25], [-82.47, 70.03], [-82.25, 69.5], [-82.47, 68.97], [-82.82, 68.82], [-82.85, 68.75], [-82.75, 68.5], [-82.97, 67.97], [-83.32, 67.82], [-83.47, 67.47], [-84.0, 67.25], [-84.25, 67.35], [-84.5, 67.25], [-84.75, 67.35], [-85.0, 67.25], [-85.53, 67.47], [-85.75, 68.0], [-85.65, 68.25], [-85.75, 68.5], [-85.65, 68.75], [-85.68, 68.82], [-86.03, 68.97], [-86.18, 69.32], [-86.25, 69.35], [-86.5, 69.25], [-87.03, 69.47], [-87.18, 69.82], [-87.25, 69.85], [-87.5, 69.75], [-87.75, 69.85], [-88.0, 69.75], [-88.53, 69.97], [-88.75, 70.5], [-88.62, 70.8], [-88.75, 70.85], [-89.0, 70.75], [-89.53, 70.97], [-89.75, 71.5], [-89.65, 71.75], [-89.68, 71.82], [-90.03, 71.97], [-90.25, 72.5]]]]}, "2016-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 71.53], [-89.68, 71.68], [-89.65, 71.75], [-89.68, 71.82], [-90.03, 71.97], [-90.25, 72.5], [-90.03, 73.03], [-89.68, 73.18], [-89.53, 73.53], [-89.18, 73.68], [-89.03, 74.03], [-88.5, 74.25], [-88.25, 74.15], [-88.0, 74.25], [-87.75, 74.15], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.75, 74.15], [-86.5, 74.25], [-86.25, 74.15], [-86.0, 74.25], [-85.47, 74.03], [-85.25, 73.5], [-85.47, 72.97], [-86.0, 72.75], [-86.25, 72.85], [-86.32, 72.82], [-86.37, 72.7], [-86.0, 72.54], [-85.5, 72.75], [-85.25, 72.65], [-85.0, 72.75], [-84.75, 72.65], [-84.5, 72.75], [-83.97, 72.53], [-83.82, 72.18], [-83.47, 72.03], [-83.25, 71.5], [-83.35, 71.25], [-83.25, 71.0], [-83.35, 70.75], [-83.25, 70.5], [-83.37, 70.2], [-83.25, 70.15], [-83.0, 70.25], [-82.47, 70.03], [-82.25, 69.5], [-82.47, 68.97], [-82.82, 68.82], [-82.85, 68.75], [-82.75, 68.5], [-82.97, 67.97], [-83.32, 67.82], [-83.47, 67.47], [-84.0, 67.25], [-84.25, 67.35], [-84.32, 67.32], [-84.47, 66.97], [-85.0, 66.75], [-85.25, 66.85], [-85.5, 66.75], [-85.75, 66.85], [-86.0, 66.75], [-86.25, 66.85], [-86.5, 66.75], [-87.03, 66.97], [-87.25, 67.5], [-87.15, 67.75], [-87.25, 68.0], [-87.03, 68.53], [-86.68, 68.68], [-86.65, 68.75], [-86.68, 68.82], [-86.75, 68.85], [-87.0, 68.75], [-87.53, 68.97], [-87.68, 69.32], [-87.75, 69.35], [-88.0, 69.25], [-88.25, 69.35], [-88.5, 69.25], [-89.03, 69.47], [-89.18, 69.82], [-89.25, 69.85], [-89.5, 69.75], [-90.03, 69.97], [-90.25, 70.5], [-90.15, 70.75], [-90.25, 71.0], [-90.03, 71.53]]]]}, "2016-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 71.53], [-89.68, 71.68], [-89.65, 71.75], [-89.68, 71.82], [-90.03, 71.97], [-90.25, 72.5], [-90.03, 73.03], [-89.68, 73.18], [-89.53, 73.53], [-89.18, 73.68], [-89.03, 74.03], [-88.5, 74.25], [-88.25, 74.15], [-88.0, 74.25], [-87.75, 74.15], [-87.5, 74.25], [-87.25, 74.15], [-87.0, 74.25], [-86.75, 74.15], [-86.5, 74.25], [-86.25, 74.15], [-86.0, 74.25], [-85.47, 74.03], [-85.25, 73.5], [-85.47, 72.97], [-86.0, 72.75], [-86.25, 72.85], [-86.32, 72.82], [-86.37, 72.7], [-86.0, 72.54], [-85.5, 72.75], [-85.25, 72.65], [-85.0, 72.75], [-84.75, 72.65], [-84.5, 72.75], [-83.97, 72.53], [-83.82, 72.18], [-83.47, 72.03], [-83.25, 71.5], [-83.35, 71.25], [-83.25, 71.0], [-83.35, 70.75], [-83.25, 70.5], [-83.37, 70.2], [-83.25, 70.15], [-83.0, 70.25], [-82.47, 70.03], [-82.25, 69.5], [-82.47, 68.97], [-82.82, 68.82], [-82.85, 68.75], [-82.75, 68.5], [-82.97, 67.97], [-83.32, 67.82], [-83.47, 67.47], [-84.0, 67.25], [-84.25, 67.35], [-84.32, 67.32], [-84.47, 66.97], [-85.0, 66.75], [-85.25, 66.85], [-85.5, 66.75], [-85.75, 66.85], [-86.0, 66.75], [-86.25, 66.85], [-86.5, 66.75], [-87.03, 66.97], [-87.25, 67.5], [-87.15, 67.75], [-87.25, 68.0], [-87.03, 68.53], [-86.68, 68.68], [-86.65, 68.75], [-86.68, 68.82], [-86.75, 68.85], [-87.0, 68.75], [-87.53, 68.97], [-87.68, 69.32], [-87.75, 69.35], [-88.0, 69.25], [-88.25, 69.35], [-88.5, 69.25], [-89.03, 69.47], [-89.18, 69.82], [-89.25, 69.85], [-89.5, 69.75], [-90.03, 69.97], [-90.25, 70.5], [-90.15, 70.75], [-90.25, 71.0], [-90.03, 71.53]]]]}, "2016-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 71.53], [-89.5, 71.75], [-89.25, 71.65], [-89.0, 71.75], [-88.75, 71.65], [-88.5, 71.75], [-87.97, 71.53], [-87.75, 71.0], [-87.85, 70.75], [-87.82, 70.68], [-87.75, 70.65], [-87.5, 70.75], [-87.25, 70.65], [-87.18, 70.68], [-87.03, 71.03], [-86.5, 71.25], [-85.97, 71.03], [-85.82, 70.68], [-85.47, 70.53], [-85.32, 70.18], [-85.25, 70.15], [-85.0, 70.25], [-84.75, 70.15], [-84.5, 70.25], [-83.97, 70.03], [-83.82, 69.68], [-83.47, 69.53], [-83.32, 69.18], [-82.97, 69.03], [-82.75, 68.5], [-82.97, 67.97], [-83.32, 67.82], [-83.47, 67.47], [-84.0, 67.25], [-84.25, 67.35], [-84.32, 67.32], [-84.47, 66.97], [-85.0, 66.75], [-85.25, 66.85], [-85.5, 66.75], [-85.75, 66.85], [-86.0, 66.75], [-86.25, 66.85], [-86.5, 66.75], [-87.03, 66.97], [-87.25, 67.5], [-87.15, 67.75], [-87.25, 68.0], [-87.03, 68.53], [-86.68, 68.68], [-86.65, 68.75], [-86.68, 68.82], [-86.75, 68.85], [-87.0, 68.75], [-87.53, 68.97], [-87.68, 69.32], [-87.75, 69.35], [-88.0, 69.25], [-88.25, 69.35], [-88.5, 69.25], [-89.03, 69.47], [-89.18, 69.82], [-89.25, 69.85], [-89.5, 69.75], [-90.03, 69.97], [-90.25, 70.5], [-90.15, 70.75], [-90.25, 71.0], [-90.03, 71.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.728447238596033}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.501258853942595}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-33.27580875774146, -32.90373228765128, -32.28552503861687, -32.17978600965793, -32.09673095605643, -31.80249896071072, -29.01189959222944]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-33.595492240358936, -32.97840260837998, -33.51530884220827, -34.259948904680556, -36.010049585608954, -35.1594278298403, -32.52067976602291]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.137681819635986, -7.130664439676778, -7.1163496957198955, -7.9508742385350155, -8.897982851391385, -9.0617098758142, -7.72851577778066]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.235618037885814, -7.283025944244997, -7.972324318336746, -9.731538117841211, -11.629855514169378, -11.728447238596033, -9.78499554222293]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2861740137970195, -1.3041824362578034, -1.2834069517398847, -1.3894541076738454, -1.626156134884654, -1.7297703313674033, -1.4999586171156765]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2920093737671539, -1.3432398649348936, -1.352445492845791, -1.5479484895121793, -2.1761709004405825, -2.3020024260404757, -1.6027169604712619]}}