{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:58.320182", "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": "2015-Oct-13_to_2015-Oct-16_266.5_76.0"}, "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": 2015100000339}, "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": "October 13 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 16 2015"}, "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": 51451.01879762717}, "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": 76.0}, "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": 266.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 263.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 75.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 78.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.03, 77.03], [-96.5, 77.25], [-96.25, 77.15], [-96.12, 77.2], [-96.25, 77.5], [-96.03, 78.03], [-95.68, 78.18], [-95.53, 78.53], [-95.0, 78.75], [-94.75, 78.65], [-94.5, 78.75], [-94.25, 78.65], [-94.0, 78.75], [-93.5, 78.54], [-93.0, 78.75], [-92.75, 78.65], [-92.5, 78.75], [-92.25, 78.65], [-92.0, 78.75], [-91.47, 78.53], [-91.32, 78.18], [-91.25, 78.15], [-91.0, 78.25], [-90.75, 78.15], [-90.5, 78.25], [-90.25, 78.15], [-90.0, 78.25], [-89.75, 78.15], [-89.5, 78.25], [-88.97, 78.03], [-88.82, 77.68], [-88.75, 77.65], [-88.5, 77.75], [-87.97, 77.53], [-87.75, 77.0], [-87.96, 76.5], [-87.75, 76.0], [-87.97, 75.47], [-88.5, 75.25], [-88.75, 75.35], [-89.0, 75.25], [-89.25, 75.35], [-89.5, 75.25], [-89.75, 75.35], [-90.0, 75.25], [-90.25, 75.35], [-90.5, 75.25], [-90.75, 75.35], [-91.0, 75.25], [-91.25, 75.35], [-91.5, 75.25], [-92.0, 75.46], [-92.5, 75.25], [-92.75, 75.35], [-93.0, 75.25], [-93.25, 75.35], [-93.5, 75.25], [-93.75, 75.35], [-94.0, 75.25], [-94.25, 75.35], [-94.5, 75.25], [-94.75, 75.35], [-95.0, 75.25], [-95.25, 75.35], [-95.5, 75.25], [-95.75, 75.35], [-96.0, 75.25], [-96.25, 75.35], [-96.5, 75.25], [-97.03, 75.47], [-97.25, 76.0], [-97.15, 76.25], [-97.25, 76.5], [-97.03, 77.03]]]]}, "2015-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.03, 77.03], [-96.5, 77.25], [-96.25, 77.15], [-96.12, 77.2], [-96.25, 77.5], [-96.03, 78.03], [-95.68, 78.18], [-95.53, 78.53], [-95.0, 78.75], [-94.75, 78.65], [-94.5, 78.75], [-94.25, 78.65], [-94.0, 78.75], [-93.5, 78.54], [-93.0, 78.75], [-92.75, 78.65], [-92.5, 78.75], [-92.25, 78.65], [-92.0, 78.75], [-91.5, 78.54], [-91.0, 78.75], [-90.75, 78.65], [-90.5, 78.75], [-90.25, 78.65], [-90.0, 78.75], [-89.75, 78.65], [-89.5, 78.75], [-89.25, 78.65], [-89.0, 78.75], [-88.75, 78.65], [-88.5, 78.75], [-88.25, 78.65], [-88.0, 78.75], [-87.75, 78.65], [-87.5, 78.75], [-87.25, 78.65], [-87.0, 78.75], [-86.75, 78.65], [-86.5, 78.75], [-86.25, 78.65], [-86.0, 78.75], [-85.47, 78.53], [-85.25, 78.0], [-85.47, 77.47], [-86.0, 77.25], [-86.25, 77.35], [-86.5, 77.25], [-86.75, 77.35], [-87.0, 77.25], [-87.25, 77.35], [-87.5, 77.25], [-87.75, 77.35], [-87.87, 77.3], [-87.75, 77.0], [-87.96, 76.5], [-87.75, 76.0], [-87.97, 75.47], [-88.5, 75.25], [-88.75, 75.35], [-89.0, 75.25], [-89.25, 75.35], [-89.5, 75.25], [-89.75, 75.35], [-90.0, 75.25], [-90.25, 75.35], [-90.5, 75.25], [-90.75, 75.35], [-91.0, 75.25], [-91.25, 75.35], [-91.5, 75.25], [-92.0, 75.46], [-92.5, 75.25], [-92.75, 75.35], [-93.0, 75.25], [-93.25, 75.35], [-93.5, 75.25], [-93.75, 75.35], [-94.0, 75.25], [-94.25, 75.35], [-94.5, 75.25], [-94.75, 75.35], [-95.0, 75.25], [-95.25, 75.35], [-95.5, 75.25], [-95.75, 75.35], [-96.0, 75.25], [-96.25, 75.35], [-96.5, 75.25], [-97.03, 75.47], [-97.25, 76.0], [-97.15, 76.25], [-97.25, 76.5], [-97.03, 77.03]]]]}, "2015-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-97.03, 77.03], [-96.5, 77.25], [-96.25, 77.15], [-96.12, 77.2], [-96.25, 77.5], [-96.03, 78.03], [-95.68, 78.18], [-95.53, 78.53], [-95.0, 78.75], [-94.75, 78.65], [-94.5, 78.75], [-94.25, 78.65], [-94.0, 78.75], [-93.5, 78.54], [-93.0, 78.75], [-92.75, 78.65], [-92.5, 78.75], [-92.25, 78.65], [-92.0, 78.75], [-91.5, 78.54], [-91.0, 78.75], [-90.75, 78.65], [-90.5, 78.75], [-90.25, 78.65], [-90.0, 78.75], [-89.75, 78.65], [-89.5, 78.75], [-89.25, 78.65], [-89.0, 78.75], [-88.75, 78.65], [-88.5, 78.75], [-88.25, 78.65], [-88.0, 78.75], [-87.75, 78.65], [-87.5, 78.75], [-87.25, 78.65], [-87.0, 78.75], [-86.75, 78.65], [-86.5, 78.75], [-86.25, 78.65], [-86.0, 78.75], [-85.47, 78.53], [-85.25, 78.0], [-85.47, 77.47], [-86.0, 77.25], [-86.25, 77.35], [-86.5, 77.25], [-86.75, 77.35], [-87.0, 77.25], [-87.25, 77.35], [-87.5, 77.25], [-87.75, 77.35], [-87.87, 77.3], [-87.75, 77.0], [-87.96, 76.5], [-87.75, 76.0], [-87.97, 75.47], [-88.5, 75.25], [-88.75, 75.35], [-89.0, 75.25], [-89.25, 75.35], [-89.5, 75.25], [-89.75, 75.35], [-90.0, 75.25], [-90.25, 75.35], [-90.5, 75.25], [-90.75, 75.35], [-91.0, 75.25], [-91.25, 75.35], [-91.5, 75.25], [-92.0, 75.46], [-92.5, 75.25], [-92.75, 75.35], [-93.0, 75.25], [-93.25, 75.35], [-93.5, 75.25], [-93.75, 75.35], [-94.0, 75.25], [-94.25, 75.35], [-94.5, 75.25], [-94.75, 75.35], [-95.0, 75.25], [-95.25, 75.35], [-95.5, 75.25], [-95.75, 75.35], [-96.0, 75.25], [-96.25, 75.35], [-96.5, 75.25], [-97.03, 75.47], [-97.25, 76.0], [-97.15, 76.25], [-97.25, 76.5], [-97.03, 77.03]]]]}, "2015-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 77.47], [-91.75, 78.0], [-91.53, 78.53], [-91.0, 78.75], [-90.75, 78.65], [-90.5, 78.75], [-90.25, 78.65], [-90.0, 78.75], [-89.75, 78.65], [-89.5, 78.75], [-89.25, 78.65], [-89.0, 78.75], [-88.75, 78.65], [-88.5, 78.75], [-88.25, 78.65], [-88.0, 78.75], [-87.75, 78.65], [-87.5, 78.75], [-87.25, 78.65], [-87.0, 78.75], [-86.75, 78.65], [-86.5, 78.75], [-86.25, 78.65], [-86.0, 78.75], [-85.47, 78.53], [-85.25, 78.0], [-85.47, 77.47], [-86.0, 77.25], [-86.25, 77.35], [-86.5, 77.25], [-86.75, 77.35], [-87.0, 77.25], [-87.25, 77.35], [-87.5, 77.25], [-87.75, 77.35], [-88.0, 77.25], [-88.25, 77.35], [-88.5, 77.25], [-88.75, 77.35], [-89.0, 77.25], [-89.25, 77.35], [-89.5, 77.25], [-89.75, 77.35], [-90.0, 77.25], [-90.25, 77.35], [-90.5, 77.25], [-90.75, 77.35], [-91.0, 77.25], [-91.53, 77.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.44726598550622}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.439013713361939}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.78191489513071, -22.017325842311436, -22.279588565204847, -22.096960113567405]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.968117282214195, -26.194140200825217, -24.876340407195443, -22.534741141581748]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.021626142593343, -8.001835026777952, -8.137732619876058, -7.070053775506494]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.008282226149703, -12.44726598550622, -10.925276478899576, -7.430123532517825]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3871319734423797, -1.746692837843637, -1.6763801871166182, -1.3613240145115197]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5062014112732411, -2.104392272952899, -2.0132270979113405, -1.4648000229705884]}}