{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:51.950103", "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": "2013-Jul-18_to_2013-Jul-25_296.0_59.0"}, "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": 2013070001026}, "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": "July 18 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 74153.36559300142}, "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": ["Davis Strait", "Hudson Strait", "Labrador 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": 59.0}, "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": 296.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "296.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 293.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 300.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.15, 59.25], [-65.25, 59.5], [-65.03, 60.03], [-64.5, 60.25], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.25, 59.0], [-63.35, 58.75], [-63.25, 58.5], [-63.47, 57.97], [-64.0, 57.75], [-64.25, 57.85], [-64.5, 57.75], [-65.03, 57.97], [-65.25, 58.5], [-65.15, 58.75], [-65.25, 59.0], [-65.15, 59.25]]]]}, "2013-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.15, 59.25], [-65.25, 59.5], [-65.03, 60.03], [-64.5, 60.25], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.25, 59.0], [-63.35, 58.75], [-63.25, 58.5], [-63.47, 57.97], [-64.0, 57.75], [-64.25, 57.85], [-64.5, 57.75], [-65.03, 57.97], [-65.25, 58.5], [-65.15, 58.75], [-65.25, 59.0], [-65.15, 59.25]]]]}, "2013-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.15, 59.25], [-65.25, 59.5], [-65.03, 60.03], [-64.5, 60.25], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.25, 59.0], [-63.35, 58.75], [-63.25, 58.5], [-63.47, 57.97], [-64.0, 57.75], [-64.25, 57.85], [-64.5, 57.75], [-65.03, 57.97], [-65.25, 58.5], [-65.15, 58.75], [-65.25, 59.0], [-65.15, 59.25]]]]}, "2013-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.18, 61.68], [-66.03, 62.03], [-65.5, 62.25], [-65.25, 62.15], [-65.0, 62.25], [-64.75, 62.15], [-64.5, 62.25], [-63.97, 62.03], [-63.82, 61.68], [-63.75, 61.65], [-63.5, 61.75], [-63.25, 61.65], [-63.0, 61.75], [-62.75, 61.65], [-62.5, 61.75], [-61.97, 61.53], [-61.82, 61.18], [-61.75, 61.15], [-61.5, 61.25], [-60.97, 61.03], [-60.82, 60.68], [-60.47, 60.53], [-60.25, 60.0], [-60.35, 59.75], [-60.32, 59.68], [-59.97, 59.53], [-59.82, 59.18], [-59.75, 59.15], [-59.5, 59.25], [-58.97, 59.03], [-58.75, 58.5], [-58.97, 57.97], [-59.5, 57.75], [-59.75, 57.85], [-60.0, 57.75], [-60.25, 57.85], [-60.5, 57.75], [-61.03, 57.97], [-61.25, 58.5], [-61.15, 58.75], [-61.18, 58.82], [-61.25, 58.85], [-61.5, 58.75], [-61.75, 58.85], [-62.0, 58.75], [-62.53, 58.97], [-62.68, 59.32], [-62.75, 59.35], [-62.82, 59.32], [-62.97, 58.97], [-63.5, 58.75], [-64.03, 58.97], [-64.25, 59.5], [-64.15, 59.75], [-64.18, 59.82], [-64.25, 59.85], [-64.5, 59.75], [-64.75, 59.85], [-65.0, 59.75], [-65.25, 59.85], [-65.5, 59.75], [-65.75, 59.85], [-66.0, 59.75], [-66.25, 59.85], [-66.5, 59.75], [-67.03, 59.97], [-67.25, 60.5], [-67.03, 61.03], [-66.68, 61.18], [-66.53, 61.53], [-66.18, 61.68]]]]}, "2013-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.18, 61.68], [-66.03, 62.03], [-65.5, 62.25], [-65.25, 62.15], [-65.0, 62.25], [-64.75, 62.15], [-64.5, 62.25], [-63.97, 62.03], [-63.82, 61.68], [-63.75, 61.65], [-63.5, 61.75], [-63.25, 61.65], [-63.0, 61.75], [-62.75, 61.65], [-62.5, 61.75], [-61.97, 61.53], [-61.82, 61.18], [-61.75, 61.15], [-61.5, 61.25], [-60.97, 61.03], [-60.82, 60.68], [-60.47, 60.53], [-60.25, 60.0], [-60.35, 59.75], [-60.32, 59.68], [-59.97, 59.53], [-59.82, 59.18], [-59.75, 59.15], [-59.5, 59.25], [-58.97, 59.03], [-58.75, 58.5], [-58.97, 57.97], [-59.5, 57.75], [-59.75, 57.85], [-60.0, 57.75], [-60.25, 57.85], [-60.5, 57.75], [-61.03, 57.97], [-61.25, 58.5], [-61.15, 58.75], [-61.18, 58.82], [-61.25, 58.85], [-61.5, 58.75], [-61.75, 58.85], [-62.0, 58.75], [-62.53, 58.97], [-62.68, 59.32], [-62.75, 59.35], [-62.82, 59.32], [-62.97, 58.97], [-63.32, 58.82], [-63.47, 58.47], [-64.0, 58.25], [-64.53, 58.47], [-64.68, 58.82], [-65.03, 58.97], [-65.18, 59.32], [-65.53, 59.47], [-65.68, 59.82], [-65.75, 59.85], [-66.0, 59.75], [-66.25, 59.85], [-66.5, 59.75], [-67.03, 59.97], [-67.25, 60.5], [-67.03, 61.03], [-66.68, 61.18], [-66.53, 61.53], [-66.18, 61.68]]]]}, "2013-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.18, 61.68], [-66.03, 62.03], [-65.5, 62.25], [-65.25, 62.15], [-65.0, 62.25], [-64.75, 62.15], [-64.5, 62.25], [-63.97, 62.03], [-63.82, 61.68], [-63.75, 61.65], [-63.5, 61.75], [-63.25, 61.65], [-63.0, 61.75], [-62.75, 61.65], [-62.5, 61.75], [-61.97, 61.53], [-61.82, 61.18], [-61.75, 61.15], [-61.5, 61.25], [-60.97, 61.03], [-60.82, 60.68], [-60.47, 60.53], [-60.25, 60.0], [-60.35, 59.75], [-60.32, 59.68], [-59.97, 59.53], [-59.82, 59.18], [-59.75, 59.15], [-59.5, 59.25], [-58.97, 59.03], [-58.75, 58.5], [-58.97, 57.97], [-59.5, 57.75], [-59.75, 57.85], [-60.0, 57.75], [-60.25, 57.85], [-60.5, 57.75], [-61.03, 57.97], [-61.25, 58.5], [-61.15, 58.75], [-61.18, 58.82], [-61.25, 58.85], [-61.5, 58.75], [-61.75, 58.85], [-62.0, 58.75], [-62.43, 58.93], [-62.25, 58.5], [-62.47, 57.97], [-63.0, 57.75], [-63.25, 57.85], [-63.5, 57.75], [-64.03, 57.97], [-64.18, 58.32], [-64.53, 58.47], [-64.68, 58.82], [-65.03, 58.97], [-65.18, 59.32], [-65.53, 59.47], [-65.68, 59.82], [-65.75, 59.85], [-66.0, 59.75], [-66.25, 59.85], [-66.5, 59.75], [-67.03, 59.97], [-67.25, 60.5], [-67.03, 61.03], [-66.68, 61.18], [-66.53, 61.53], [-66.18, 61.68]], [[-62.82, 59.32], [-62.85, 59.25], [-62.82, 59.18], [-62.57, 59.07], [-62.68, 59.32], [-62.75, 59.35], [-62.82, 59.32]]]]}, "2013-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.0, 61.75], [-65.47, 61.53], [-65.32, 61.18], [-65.25, 61.15], [-65.0, 61.25], [-64.75, 61.15], [-64.5, 61.25], [-64.25, 61.15], [-64.0, 61.25], [-63.75, 61.15], [-63.5, 61.25], [-63.25, 61.15], [-63.0, 61.25], [-62.47, 61.03], [-62.32, 60.68], [-62.25, 60.65], [-62.0, 60.75], [-61.75, 60.65], [-61.5, 60.75], [-60.97, 60.53], [-60.82, 60.18], [-60.47, 60.03], [-60.32, 59.68], [-59.97, 59.53], [-59.82, 59.18], [-59.75, 59.15], [-59.5, 59.25], [-58.97, 59.03], [-58.75, 58.5], [-58.97, 57.97], [-59.5, 57.75], [-59.75, 57.85], [-60.0, 57.75], [-60.25, 57.85], [-60.5, 57.75], [-61.03, 57.97], [-61.25, 58.5], [-61.15, 58.75], [-61.18, 58.82], [-61.25, 58.85], [-61.5, 58.75], [-61.75, 58.85], [-62.0, 58.75], [-62.43, 58.93], [-62.25, 58.5], [-62.47, 57.97], [-63.0, 57.75], [-63.25, 57.85], [-63.5, 57.75], [-64.03, 57.97], [-64.18, 58.32], [-64.53, 58.47], [-64.68, 58.82], [-65.03, 58.97], [-65.18, 59.32], [-65.53, 59.47], [-65.68, 59.82], [-65.75, 59.85], [-66.0, 59.75], [-66.25, 59.85], [-66.5, 59.75], [-67.03, 59.97], [-67.25, 60.5], [-67.03, 61.03], [-66.68, 61.18], [-66.53, 61.53], [-66.0, 61.75]], [[-62.82, 59.32], [-62.85, 59.25], [-62.82, 59.18], [-62.57, 59.07], [-62.68, 59.32], [-62.75, 59.35], [-62.82, 59.32]]]]}, "2013-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.75, 60.0], [-65.53, 60.53], [-65.0, 60.75], [-64.75, 60.65], [-64.5, 60.75], [-64.25, 60.65], [-64.0, 60.75], [-63.75, 60.65], [-63.5, 60.75], [-63.25, 60.65], [-63.0, 60.75], [-62.47, 60.53], [-62.25, 60.0], [-62.47, 59.47], [-62.82, 59.32], [-62.85, 59.25], [-62.82, 59.18], [-62.47, 59.03], [-62.25, 58.5], [-62.47, 57.97], [-63.0, 57.75], [-63.25, 57.85], [-63.5, 57.75], [-64.03, 57.97], [-64.18, 58.32], [-64.53, 58.47], [-64.68, 58.82], [-65.03, 58.97], [-65.18, 59.32], [-65.53, 59.47], [-65.75, 60.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.9736845993637075}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8928354088127954}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.332204382518739, 4.048370448781327, 3.0187441753409416, 1.4311709432312796, 2.1187620369801152, 2.2454611074012973, 2.3934700241245537, 2.7847455815023068]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.4374684861056153, 3.671856046884784, 2.4484570772443135, 0.28129558672964095, 1.3378025539241207, 1.016359154846782, 1.5918343443675553, 1.4466013643718725]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.802576183498047, -4.90730443336447, -5.814869668609629, -2.4897698451542536, -2.256844898962213, -2.480945421114375, -2.972432627170734, -4.76135929029158]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.244274454516358, -5.366770624298113, -6.547533152093877, -3.28074206270702, -4.983565289949411, -6.305117636345983, -7.4155278988824875, -7.9736845993637075]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3970528912899256, -1.421011284050528, -1.655126602271698, -1.8912823098628664, -1.503016738101195, -1.482461171567501, -1.5161149296749046, -1.6083887917066388]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5084332637127789, -1.5947990498402131, -1.7850696067217053, -2.4471238434119353, -2.00304331160684, -1.9405621784385565, -2.056723593181096, -2.139715026996943]}}