{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:21.732780", "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-May-18_to_2013-May-21_303.0_47.5"}, "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": 2013050000719}, "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": "May 18 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2013"}, "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": 59496.06225436969}, "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": ["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": ["Gulf of St. Lawrence", "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": 47.5}, "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": 303.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, 48.53], [-57.68, 48.68], [-57.65, 48.75], [-57.75, 49.0], [-57.53, 49.53], [-57.0, 49.75], [-56.75, 49.65], [-56.5, 49.75], [-56.25, 49.65], [-56.18, 49.68], [-56.03, 50.03], [-55.5, 50.25], [-55.0, 50.04], [-54.5, 50.25], [-53.97, 50.03], [-53.82, 49.68], [-53.47, 49.53], [-53.32, 49.18], [-52.97, 49.03], [-52.75, 48.5], [-52.97, 47.97], [-53.32, 47.82], [-53.47, 47.47], [-54.0, 47.25], [-54.25, 47.35], [-54.32, 47.32], [-54.47, 46.97], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.18, 47.32], [-56.25, 47.35], [-56.32, 47.32], [-56.47, 46.97], [-57.0, 46.75], [-57.25, 46.85], [-57.5, 46.75], [-58.03, 46.97], [-58.25, 47.5], [-58.15, 47.75], [-58.25, 48.0], [-58.03, 48.53]]]]}, "2013-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, 48.53], [-57.68, 48.68], [-57.65, 48.75], [-57.75, 49.0], [-57.53, 49.53], [-57.0, 49.75], [-56.75, 49.65], [-56.5, 49.75], [-56.25, 49.65], [-56.18, 49.68], [-56.03, 50.03], [-55.5, 50.25], [-55.0, 50.04], [-54.5, 50.25], [-53.97, 50.03], [-53.82, 49.68], [-53.47, 49.53], [-53.32, 49.18], [-52.97, 49.03], [-52.75, 48.5], [-52.97, 47.97], [-53.32, 47.82], [-53.47, 47.47], [-54.0, 47.25], [-54.25, 47.35], [-54.32, 47.32], [-54.47, 46.97], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.18, 47.32], [-56.25, 47.35], [-56.32, 47.32], [-56.47, 46.97], [-57.0, 46.75], [-57.25, 46.85], [-57.5, 46.75], [-58.03, 46.97], [-58.25, 47.5], [-58.15, 47.75], [-58.25, 48.0], [-58.03, 48.53]]]]}, "2013-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, 48.53], [-57.68, 48.68], [-57.65, 48.75], [-57.75, 49.0], [-57.53, 49.53], [-57.0, 49.75], [-56.75, 49.65], [-56.5, 49.75], [-56.25, 49.65], [-56.18, 49.68], [-56.03, 50.03], [-55.5, 50.25], [-55.0, 50.04], [-54.5, 50.25], [-53.97, 50.03], [-53.82, 49.68], [-53.47, 49.53], [-53.32, 49.18], [-52.97, 49.03], [-52.75, 48.5], [-52.97, 47.97], [-53.32, 47.82], [-53.47, 47.47], [-54.0, 47.25], [-54.25, 47.35], [-54.32, 47.32], [-54.47, 46.97], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.18, 47.32], [-56.25, 47.35], [-56.32, 47.32], [-56.47, 46.97], [-57.0, 46.75], [-57.25, 46.85], [-57.5, 46.75], [-58.03, 46.97], [-58.25, 47.5], [-58.15, 47.75], [-58.25, 48.0], [-58.03, 48.53]]]]}, "2013-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.0, 48.25], [-56.47, 48.03], [-56.25, 47.5], [-56.47, 46.97], [-57.0, 46.75], [-57.53, 46.97], [-57.75, 47.5], [-57.53, 48.03], [-57.0, 48.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.02927609146144}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.398435217694402}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.473591618386365, 0.805517986396012, 2.5982148731422967, 4.216817204734923]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.1077864044914918, -0.6166426225657347, 0.6900430329817482, 4.216817204734923]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.480256519541556, -6.246711846209433, -4.575041058839963, -2.304025843969839]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.216734335836122, -8.02927609146144, -7.214067837355117, -2.304025843969839]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8088129677819234, -2.1265908962194056, -1.5155445257280074, -1.3582996806961798]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1890350414124087, -2.6039786644175305, -1.8445253792796876, -1.3582996806961798]}}