{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:53.992979", "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-21_to_2016-Mar-26_266.0_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": 2016030000516}, "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 21 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 26 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 190170.85990070147}, "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": ["Hudson Bay"]}, "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": 266.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.53, 62.03], [-93.18, 62.18], [-93.03, 62.53], [-92.5, 62.75], [-91.97, 62.53], [-91.75, 62.0], [-91.85, 61.75], [-91.75, 61.5], [-91.85, 61.25], [-91.75, 61.0], [-91.85, 60.75], [-91.82, 60.68], [-91.75, 60.65], [-91.5, 60.75], [-90.97, 60.53], [-90.82, 60.18], [-90.75, 60.15], [-90.5, 60.25], [-89.97, 60.03], [-89.82, 59.68], [-89.75, 59.65], [-89.5, 59.75], [-88.97, 59.53], [-88.75, 59.0], [-88.97, 58.47], [-89.5, 58.25], [-89.75, 58.35], [-90.0, 58.25], [-90.25, 58.35], [-90.5, 58.25], [-90.75, 58.35], [-91.0, 58.25], [-91.53, 58.47], [-91.68, 58.82], [-91.75, 58.85], [-92.0, 58.75], [-92.25, 58.85], [-92.5, 58.75], [-93.03, 58.97], [-93.25, 59.5], [-93.15, 59.75], [-93.25, 60.0], [-93.15, 60.25], [-93.25, 60.5], [-93.15, 60.75], [-93.18, 60.82], [-93.53, 60.97], [-93.75, 61.5], [-93.53, 62.03]]], [[[-95.75, 66.0], [-95.53, 66.53], [-95.18, 66.68], [-95.03, 67.03], [-94.5, 67.25], [-93.97, 67.03], [-93.75, 66.5], [-93.85, 66.25], [-93.75, 66.0], [-93.97, 65.47], [-94.32, 65.32], [-94.35, 65.25], [-94.25, 65.0], [-94.47, 64.47], [-95.0, 64.25], [-95.53, 64.47], [-95.75, 65.0], [-95.65, 65.25], [-95.75, 65.5], [-95.65, 65.75], [-95.75, 66.0]]]]}, "2016-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.75, 65.0], [-96.53, 65.53], [-96.0, 65.75], [-95.7, 65.63], [-95.65, 65.75], [-95.75, 66.0], [-95.53, 66.53], [-95.18, 66.68], [-95.03, 67.03], [-94.5, 67.25], [-93.97, 67.03], [-93.75, 66.5], [-93.85, 66.25], [-93.75, 66.0], [-93.97, 65.47], [-94.32, 65.32], [-94.35, 65.25], [-94.25, 65.0], [-94.46, 64.5], [-94.32, 64.18], [-93.97, 64.03], [-93.82, 63.68], [-93.47, 63.53], [-93.25, 63.0], [-93.37, 62.7], [-93.25, 62.65], [-93.0, 62.75], [-92.75, 62.65], [-92.5, 62.75], [-91.97, 62.53], [-91.75, 62.0], [-91.85, 61.75], [-91.75, 61.5], [-91.85, 61.25], [-91.75, 61.0], [-91.85, 60.75], [-91.82, 60.68], [-91.75, 60.65], [-91.5, 60.75], [-90.97, 60.53], [-90.82, 60.18], [-90.75, 60.15], [-90.5, 60.25], [-89.97, 60.03], [-89.82, 59.68], [-89.75, 59.65], [-89.5, 59.75], [-88.97, 59.53], [-88.75, 59.0], [-88.97, 58.47], [-89.5, 58.25], [-89.75, 58.35], [-90.0, 58.25], [-90.25, 58.35], [-90.5, 58.25], [-90.75, 58.35], [-91.0, 58.25], [-91.25, 58.35], [-91.5, 58.25], [-91.75, 58.35], [-92.0, 58.25], [-92.53, 58.47], [-92.68, 58.82], [-93.03, 58.97], [-93.18, 59.32], [-93.53, 59.47], [-93.75, 60.0], [-93.65, 60.25], [-93.68, 60.32], [-94.03, 60.47], [-94.18, 60.82], [-94.53, 60.97], [-94.75, 61.5], [-94.65, 61.75], [-94.75, 62.0], [-94.62, 62.3], [-94.75, 62.35], [-95.0, 62.25], [-95.53, 62.47], [-95.75, 63.0], [-95.65, 63.25], [-95.75, 63.5], [-95.65, 63.75], [-95.68, 63.82], [-96.03, 63.97], [-96.18, 64.32], [-96.53, 64.47], [-96.75, 65.0]]]]}, "2016-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.53, 58.97], [-100.75, 59.5], [-100.53, 60.03], [-100.0, 60.25], [-99.75, 60.15], [-99.68, 60.18], [-99.65, 60.25], [-99.68, 60.32], [-100.03, 60.47], [-100.25, 61.0], [-100.03, 61.53], [-99.5, 61.75], [-98.97, 61.53], [-98.82, 61.18], [-98.7, 61.12], [-98.53, 61.53], [-98.0, 61.75], [-97.7, 61.62], [-97.53, 62.03], [-97.0, 62.25], [-96.75, 62.15], [-96.5, 62.25], [-97.03, 62.47], [-97.25, 63.0], [-97.03, 63.53], [-96.5, 63.75], [-96.25, 63.65], [-96.0, 63.75], [-95.75, 63.65], [-95.68, 63.68], [-95.65, 63.75], [-95.68, 63.82], [-96.03, 63.97], [-96.18, 64.32], [-96.53, 64.47], [-96.75, 65.0], [-96.53, 65.53], [-96.0, 65.75], [-95.7, 65.63], [-95.65, 65.75], [-95.75, 66.0], [-95.53, 66.53], [-95.18, 66.68], [-95.03, 67.03], [-94.5, 67.25], [-93.97, 67.03], [-93.75, 66.5], [-93.85, 66.25], [-93.75, 66.0], [-93.97, 65.47], [-94.32, 65.32], [-94.35, 65.25], [-94.25, 65.0], [-94.46, 64.5], [-94.32, 64.18], [-93.97, 64.03], [-93.82, 63.68], [-93.47, 63.53], [-93.25, 63.0], [-93.37, 62.7], [-93.25, 62.65], [-93.0, 62.75], [-92.75, 62.65], [-92.5, 62.75], [-91.97, 62.53], [-91.75, 62.0], [-91.85, 61.75], [-91.75, 61.5], [-91.85, 61.25], [-91.75, 61.0], [-91.85, 60.75], [-91.82, 60.68], [-91.75, 60.65], [-91.5, 60.75], [-90.97, 60.53], [-90.82, 60.18], [-90.75, 60.15], [-90.5, 60.25], [-89.97, 60.03], [-89.82, 59.68], [-89.75, 59.65], [-89.5, 59.75], [-88.97, 59.53], [-88.75, 59.0], [-88.97, 58.47], [-89.5, 58.25], [-89.75, 58.35], [-90.0, 58.25], [-90.25, 58.35], [-90.5, 58.25], [-90.75, 58.35], [-91.0, 58.25], [-91.25, 58.35], [-91.5, 58.25], [-91.75, 58.35], [-92.0, 58.25], [-92.25, 58.35], [-92.5, 58.25], [-92.75, 58.35], [-92.82, 58.32], [-92.97, 57.97], [-93.32, 57.82], [-93.47, 57.47], [-94.0, 57.25], [-94.25, 57.35], [-94.5, 57.25], [-94.75, 57.35], [-95.0, 57.25], [-95.25, 57.35], [-95.5, 57.25], [-96.03, 57.47], [-96.18, 57.82], [-96.25, 57.85], [-96.5, 57.75], [-96.75, 57.85], [-97.0, 57.75], [-97.5, 57.96], [-98.0, 57.75], [-98.25, 57.85], [-98.5, 57.75], [-99.03, 57.97], [-99.18, 58.32], [-99.53, 58.47], [-99.68, 58.82], [-99.75, 58.85], [-100.0, 58.75], [-100.53, 58.97]], [[-96.25, 62.15], [-96.12, 62.2], [-96.18, 62.32], [-96.25, 62.35], [-96.5, 62.25], [-96.25, 62.15]]]]}, "2016-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.47, 60.03], [-88.25, 59.5], [-88.47, 58.97], [-89.0, 58.75], [-89.53, 58.97], [-89.75, 59.5], [-89.53, 60.03], [-89.0, 60.25], [-88.47, 60.03]]], [[[-100.75, 59.5], [-100.53, 60.03], [-100.0, 60.25], [-99.75, 60.15], [-99.68, 60.18], [-99.65, 60.25], [-99.68, 60.32], [-100.03, 60.47], [-100.25, 61.0], [-100.03, 61.53], [-99.5, 61.75], [-98.97, 61.53], [-98.82, 61.18], [-98.7, 61.12], [-98.53, 61.53], [-98.0, 61.75], [-97.7, 61.62], [-97.53, 62.03], [-97.0, 62.25], [-96.75, 62.15], [-96.68, 62.18], [-96.62, 62.3], [-97.03, 62.47], [-97.25, 63.0], [-97.03, 63.53], [-96.5, 63.75], [-96.25, 63.65], [-96.0, 63.75], [-95.75, 63.65], [-95.68, 63.68], [-95.65, 63.75], [-95.68, 63.82], [-96.03, 63.97], [-96.18, 64.32], [-96.53, 64.47], [-96.75, 65.0], [-96.53, 65.53], [-96.0, 65.75], [-95.47, 65.53], [-95.32, 65.18], [-94.97, 65.03], [-94.82, 64.68], [-94.47, 64.53], [-94.32, 64.18], [-93.97, 64.03], [-93.82, 63.68], [-93.47, 63.53], [-93.25, 63.0], [-93.37, 62.7], [-93.25, 62.65], [-93.0, 62.75], [-92.75, 62.65], [-92.5, 62.75], [-91.97, 62.53], [-91.75, 62.0], [-91.85, 61.75], [-91.75, 61.5], [-91.85, 61.25], [-91.75, 61.0], [-91.85, 60.75], [-91.82, 60.68], [-91.75, 60.65], [-91.5, 60.75], [-90.97, 60.53], [-90.82, 60.18], [-90.75, 60.15], [-90.5, 60.25], [-89.97, 60.03], [-89.75, 59.5], [-89.85, 59.25], [-89.75, 59.0], [-89.97, 58.47], [-90.5, 58.25], [-90.75, 58.35], [-91.0, 58.25], [-91.25, 58.35], [-91.5, 58.25], [-91.75, 58.35], [-92.0, 58.25], [-92.25, 58.35], [-92.5, 58.25], [-92.75, 58.35], [-92.82, 58.32], [-92.97, 57.97], [-93.32, 57.82], [-93.47, 57.47], [-94.0, 57.25], [-94.25, 57.35], [-94.5, 57.25], [-94.75, 57.35], [-95.0, 57.25], [-95.25, 57.35], [-95.5, 57.25], [-96.03, 57.47], [-96.18, 57.82], [-96.25, 57.85], [-96.5, 57.75], [-96.75, 57.85], [-97.0, 57.75], [-97.5, 57.96], [-98.0, 57.75], [-98.25, 57.85], [-98.5, 57.75], [-99.03, 57.97], [-99.18, 58.32], [-99.53, 58.47], [-99.68, 58.82], [-99.75, 58.85], [-100.0, 58.75], [-100.53, 58.97], [-100.75, 59.5]]]]}, "2016-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.47, 60.03], [-88.25, 59.5], [-88.47, 58.97], [-89.0, 58.75], [-89.53, 58.97], [-89.75, 59.5], [-89.53, 60.03], [-89.0, 60.25], [-88.47, 60.03]]], [[[-100.75, 59.5], [-100.53, 60.03], [-100.0, 60.25], [-99.75, 60.15], [-99.68, 60.18], [-99.65, 60.25], [-99.68, 60.32], [-100.03, 60.47], [-100.25, 61.0], [-100.03, 61.53], [-99.5, 61.75], [-98.97, 61.53], [-98.82, 61.18], [-98.7, 61.12], [-98.53, 61.53], [-98.0, 61.75], [-97.7, 61.62], [-97.53, 62.03], [-97.0, 62.25], [-96.75, 62.15], [-96.68, 62.18], [-96.62, 62.3], [-97.03, 62.47], [-97.25, 63.0], [-97.03, 63.53], [-96.5, 63.75], [-96.25, 63.65], [-96.0, 63.75], [-95.75, 63.65], [-95.5, 63.75], [-94.97, 63.53], [-94.75, 63.0], [-94.85, 62.75], [-94.82, 62.68], [-94.75, 62.65], [-94.5, 62.75], [-94.25, 62.65], [-94.0, 62.75], [-93.75, 62.65], [-93.5, 62.75], [-93.25, 62.65], [-93.0, 62.75], [-92.47, 62.53], [-92.32, 62.18], [-91.97, 62.03], [-91.75, 61.5], [-91.85, 61.25], [-91.75, 61.0], [-91.87, 60.7], [-91.75, 60.65], [-91.5, 60.75], [-90.97, 60.53], [-90.82, 60.18], [-90.75, 60.15], [-90.5, 60.25], [-89.97, 60.03], [-89.75, 59.5], [-89.97, 58.97], [-90.5, 58.75], [-90.75, 58.85], [-91.0, 58.75], [-91.25, 58.85], [-91.5, 58.75], [-91.75, 58.85], [-91.82, 58.82], [-91.97, 58.47], [-92.5, 58.25], [-92.75, 58.35], [-92.82, 58.32], [-92.97, 57.97], [-93.32, 57.82], [-93.47, 57.47], [-94.0, 57.25], [-94.25, 57.35], [-94.5, 57.25], [-94.75, 57.35], [-95.0, 57.25], [-95.25, 57.35], [-95.5, 57.25], [-96.03, 57.47], [-96.18, 57.82], [-96.25, 57.85], [-96.5, 57.75], [-96.75, 57.85], [-97.0, 57.75], [-97.5, 57.96], [-98.0, 57.75], [-98.25, 57.85], [-98.5, 57.75], [-99.03, 57.97], [-99.18, 58.32], [-99.53, 58.47], [-99.68, 58.82], [-99.75, 58.85], [-100.0, 58.75], [-100.53, 58.97], [-100.75, 59.5]], [[-93.25, 60.65], [-93.12, 60.7], [-93.2, 60.88], [-93.32, 60.82], [-93.37, 60.7], [-93.25, 60.65]]]]}, "2016-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.53, 58.97], [-89.75, 59.5], [-89.53, 60.03], [-89.0, 60.25], [-88.47, 60.03], [-88.25, 59.5], [-88.47, 58.97], [-89.0, 58.75], [-89.53, 58.97]]], [[[-97.03, 63.53], [-96.5, 63.75], [-96.25, 63.65], [-96.0, 63.75], [-95.75, 63.65], [-95.5, 63.75], [-94.97, 63.53], [-94.75, 63.0], [-94.85, 62.75], [-94.82, 62.68], [-94.75, 62.65], [-94.5, 62.75], [-94.25, 62.65], [-94.0, 62.75], [-93.75, 62.65], [-93.5, 62.75], [-92.97, 62.53], [-92.75, 62.0], [-92.97, 61.47], [-93.32, 61.32], [-93.47, 60.97], [-93.82, 60.82], [-93.97, 60.47], [-94.5, 60.25], [-94.75, 60.35], [-95.0, 60.25], [-95.53, 60.47], [-95.75, 61.0], [-95.65, 61.25], [-95.68, 61.32], [-95.75, 61.35], [-96.0, 61.25], [-96.53, 61.47], [-96.75, 62.0], [-96.62, 62.3], [-97.03, 62.47], [-97.25, 63.0], [-97.03, 63.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.885486101608109}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.232718137906698}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-25.22075600657223, -26.61571668897153, -26.62269375010331, -27.091632233467323, -26.960087269431114, -28.817773087455578]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-35.087023458530865, -35.309721783235545, -34.65730345104248, -31.701243842887806, -31.008921331259586, -30.031193927242953]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.94450146072536, -7.775823578003739, -8.862338733365041, -9.796869292482363, -10.144829040296415, -9.05199472069745]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.48528595162162, -10.079265685805439, -11.412882583763661, -12.375343486598041, -13.885486101608109, -10.295760901137953]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2898557932474632, -1.3074553190342024, -1.2866318778382362, -1.3911613467759285, -1.4247693090519287, -1.285414838985953]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3846212187746796, -1.3939172555530304, -1.5110177704715593, -1.6083746096777467, -1.7851472405544195, -1.4095383371670864]}}