{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:24.286426", "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": "2012-Jan-27_to_2012-Jan-31_233.0_67.0"}, "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": 2012010001418}, "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": "January 27 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 54130.439753791325}, "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.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": []}, "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": 67.0}, "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": 233.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "233.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 230.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 239.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 64.5], [-124.53, 65.03], [-124.0, 65.25], [-123.75, 65.15], [-123.5, 65.25], [-122.97, 65.03], [-122.75, 64.5], [-122.97, 63.97], [-123.5, 63.75], [-123.75, 63.85], [-124.0, 63.75], [-124.53, 63.97], [-124.75, 64.5]]], [[[-126.32, 67.18], [-126.25, 67.15], [-126.0, 67.25], [-125.47, 67.03], [-125.25, 66.5], [-125.47, 65.97], [-126.0, 65.75], [-126.25, 65.85], [-126.5, 65.75], [-126.75, 65.85], [-127.0, 65.75], [-127.53, 65.97], [-127.75, 66.5], [-127.65, 66.75], [-127.75, 67.0], [-127.53, 67.53], [-127.0, 67.75], [-126.47, 67.53], [-126.32, 67.18]]], [[[-130.03, 67.53], [-129.5, 67.75], [-129.25, 67.65], [-129.0, 67.75], [-128.75, 67.65], [-128.5, 67.75], [-127.97, 67.53], [-127.75, 67.0], [-127.97, 66.47], [-128.5, 66.25], [-128.75, 66.35], [-129.0, 66.25], [-129.25, 66.35], [-129.5, 66.25], [-130.03, 66.47], [-130.25, 67.0], [-130.03, 67.53]]]]}, "2012-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 66.47], [-130.25, 67.0], [-130.03, 67.53], [-129.5, 67.75], [-129.25, 67.65], [-129.0, 67.75], [-128.75, 67.65], [-128.5, 67.75], [-127.97, 67.53], [-127.82, 67.18], [-127.75, 67.15], [-127.68, 67.18], [-127.53, 67.53], [-127.0, 67.75], [-126.75, 67.65], [-126.5, 67.75], [-126.25, 67.65], [-126.0, 67.75], [-125.75, 67.65], [-125.5, 67.75], [-125.25, 67.65], [-125.0, 67.75], [-124.47, 67.53], [-124.32, 67.18], [-124.25, 67.15], [-124.0, 67.25], [-123.5, 67.04], [-123.0, 67.25], [-122.47, 67.03], [-122.32, 66.68], [-121.97, 66.53], [-121.8, 66.13], [-121.5, 66.25], [-121.25, 66.15], [-121.0, 66.25], [-120.47, 66.03], [-120.32, 65.68], [-119.97, 65.53], [-119.75, 65.0], [-119.97, 64.47], [-120.5, 64.25], [-120.75, 64.35], [-121.0, 64.25], [-121.25, 64.35], [-121.32, 64.32], [-121.47, 63.97], [-122.0, 63.75], [-122.25, 63.85], [-122.5, 63.75], [-122.75, 63.85], [-123.0, 63.75], [-123.25, 63.85], [-123.5, 63.75], [-123.75, 63.85], [-124.0, 63.75], [-124.53, 63.97], [-124.75, 64.5], [-124.53, 65.03], [-124.0, 65.25], [-124.25, 65.35], [-124.5, 65.25], [-124.75, 65.35], [-125.0, 65.25], [-125.25, 65.35], [-125.5, 65.25], [-126.03, 65.47], [-126.18, 65.82], [-126.25, 65.85], [-126.5, 65.75], [-126.75, 65.85], [-127.0, 65.75], [-127.25, 65.85], [-127.5, 65.75], [-127.75, 65.85], [-128.0, 65.75], [-128.25, 65.85], [-128.5, 65.75], [-129.03, 65.97], [-129.18, 66.32], [-129.25, 66.35], [-129.5, 66.25], [-130.03, 66.47]], [[-123.75, 65.15], [-123.62, 65.2], [-123.68, 65.32], [-123.75, 65.35], [-124.0, 65.25], [-123.75, 65.15]]]]}, "2012-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 67.53], [-129.5, 67.75], [-129.25, 67.65], [-129.0, 67.75], [-128.75, 67.65], [-128.5, 67.75], [-127.97, 67.53], [-127.82, 67.18], [-127.75, 67.15], [-127.68, 67.18], [-127.53, 67.53], [-127.0, 67.75], [-126.75, 67.65], [-126.5, 67.75], [-126.25, 67.65], [-126.0, 67.75], [-125.75, 67.65], [-125.5, 67.75], [-125.25, 67.65], [-125.0, 67.75], [-124.47, 67.53], [-124.32, 67.18], [-124.25, 67.15], [-124.0, 67.25], [-123.5, 67.04], [-123.0, 67.25], [-122.47, 67.03], [-122.32, 66.68], [-121.97, 66.53], [-121.82, 66.18], [-121.75, 66.15], [-121.5, 66.25], [-121.25, 66.15], [-121.0, 66.25], [-120.47, 66.03], [-120.32, 65.68], [-119.97, 65.53], [-119.75, 65.0], [-119.97, 64.47], [-120.5, 64.25], [-120.75, 64.35], [-121.0, 64.25], [-121.25, 64.35], [-121.32, 64.32], [-121.47, 63.97], [-122.0, 63.75], [-122.25, 63.85], [-122.5, 63.75], [-122.75, 63.85], [-123.0, 63.75], [-123.25, 63.85], [-123.5, 63.75], [-123.75, 63.85], [-124.0, 63.75], [-124.53, 63.97], [-124.75, 64.5], [-124.53, 65.03], [-124.0, 65.25], [-124.25, 65.35], [-124.5, 65.25], [-124.75, 65.35], [-125.0, 65.25], [-125.25, 65.35], [-125.5, 65.25], [-126.03, 65.47], [-126.18, 65.82], [-126.25, 65.85], [-126.5, 65.75], [-126.75, 65.85], [-127.0, 65.75], [-127.25, 65.85], [-127.5, 65.75], [-127.75, 65.85], [-128.0, 65.75], [-128.25, 65.85], [-128.32, 65.82], [-128.47, 65.47], [-129.0, 65.25], [-129.25, 65.35], [-129.5, 65.25], [-130.03, 65.47], [-130.25, 66.0], [-130.04, 66.5], [-130.25, 67.0], [-130.03, 67.53]], [[-123.75, 65.15], [-123.62, 65.2], [-123.68, 65.32], [-123.75, 65.35], [-124.0, 65.25], [-123.75, 65.15]]]]}, "2012-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 67.53], [-129.5, 67.75], [-129.25, 67.65], [-129.0, 67.75], [-128.75, 67.65], [-128.5, 67.75], [-127.97, 67.53], [-127.82, 67.18], [-127.75, 67.15], [-127.68, 67.18], [-127.53, 67.53], [-127.0, 67.75], [-126.75, 67.65], [-126.5, 67.75], [-126.25, 67.65], [-126.0, 67.75], [-125.75, 67.65], [-125.5, 67.75], [-125.25, 67.65], [-125.0, 67.75], [-124.47, 67.53], [-124.32, 67.18], [-124.25, 67.15], [-124.0, 67.25], [-123.5, 67.04], [-123.0, 67.25], [-122.47, 67.03], [-122.32, 66.68], [-121.97, 66.53], [-121.82, 66.18], [-121.75, 66.15], [-121.5, 66.25], [-121.25, 66.15], [-121.0, 66.25], [-120.47, 66.03], [-120.32, 65.68], [-119.97, 65.53], [-119.75, 65.0], [-119.97, 64.47], [-120.5, 64.25], [-120.75, 64.35], [-121.0, 64.25], [-121.25, 64.35], [-121.32, 64.32], [-121.47, 63.97], [-122.0, 63.75], [-122.25, 63.85], [-122.5, 63.75], [-122.75, 63.85], [-123.0, 63.75], [-123.25, 63.85], [-123.5, 63.75], [-123.75, 63.85], [-124.0, 63.75], [-124.53, 63.97], [-124.75, 64.5], [-124.53, 65.03], [-124.0, 65.25], [-124.25, 65.35], [-124.5, 65.25], [-124.75, 65.35], [-125.0, 65.25], [-125.25, 65.35], [-125.5, 65.25], [-126.03, 65.47], [-126.18, 65.82], [-126.25, 65.85], [-126.5, 65.75], [-126.75, 65.85], [-127.0, 65.75], [-127.25, 65.85], [-127.5, 65.75], [-127.75, 65.85], [-128.0, 65.75], [-128.25, 65.85], [-128.32, 65.82], [-128.47, 65.47], [-129.0, 65.25], [-129.25, 65.35], [-129.5, 65.25], [-130.03, 65.47], [-130.25, 66.0], [-130.04, 66.5], [-130.25, 67.0], [-130.03, 67.53]], [[-123.75, 65.15], [-123.62, 65.2], [-123.68, 65.32], [-123.75, 65.35], [-124.0, 65.25], [-123.75, 65.15]]]]}, "2012-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.25, 65.5], [-123.03, 66.03], [-122.5, 66.25], [-122.25, 66.15], [-122.0, 66.25], [-121.47, 66.03], [-121.25, 65.5], [-121.47, 64.97], [-122.0, 64.75], [-122.25, 64.85], [-122.5, 64.75], [-123.03, 64.97], [-123.25, 65.5]]], [[[-130.25, 66.0], [-130.03, 66.53], [-129.5, 66.75], [-129.25, 66.65], [-129.0, 66.75], [-128.47, 66.53], [-128.25, 66.0], [-128.47, 65.47], [-129.0, 65.25], [-129.25, 65.35], [-129.5, 65.25], [-130.03, 65.47], [-130.25, 66.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.48983081325045}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.713024146404234}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-36.57639810586463, -36.34429959084213, -36.20970391816317, -37.84134033930326, -36.084794454341875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-38.27586427018343, -38.86650077167633, -39.5843841559371, -41.72548319961075, -39.45259751030039]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.608101605646432, -10.27887291923883, -10.12620858986312, -11.734616528141459, -10.508223457113836]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.99566661808791, -12.141435092399007, -13.664425460232195, -15.48983081325045, -13.366497438427643]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.305534097709307, -1.3802072437052277, -1.3728646116158443, -1.6281771416139275, -1.3763977870328779]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4156026154085852, -1.5396580974882619, -1.6924745438077438, -1.8546063780470419, -1.4353821532364808]}}