{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:32.971878", "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": "2021-May-11_to_2021-May-14_259.5_73.5"}, "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": 2021050000594}, "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 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 14 2021"}, "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": 65264.70714936426}, "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": 73.5}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 70.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 74.03], [-101.0, 74.25], [-100.75, 74.15], [-100.5, 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70.25], [-97.75, 70.35], [-98.0, 70.25], [-98.25, 70.35], [-98.5, 70.25], [-98.75, 70.35], [-99.0, 70.25], [-99.53, 70.47], [-99.68, 70.82], [-99.75, 70.85], [-100.0, 70.75], [-100.25, 70.85], [-100.5, 70.75], [-100.75, 70.85], [-101.0, 70.75], [-101.53, 70.97], [-101.68, 71.32], [-101.75, 71.35], [-102.0, 71.25], [-102.53, 71.47], [-102.68, 71.82], [-102.75, 71.85], [-103.0, 71.75], [-103.53, 71.97], [-103.75, 72.5], [-103.53, 73.03], [-103.18, 73.18], [-103.03, 73.53], [-102.5, 73.75]]]]}, "2021-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.5, 73.75], [-102.25, 73.65], [-102.18, 73.68], [-102.03, 74.03], [-101.5, 74.25], [-101.25, 74.15], [-101.0, 74.25], [-100.75, 74.15], [-100.5, 74.25], [-100.25, 74.15], [-100.0, 74.25], [-99.75, 74.15], [-99.5, 74.25], [-99.25, 74.15], [-99.18, 74.18], [-99.03, 74.53], [-98.5, 74.75], [-98.25, 74.65], [-98.0, 74.75], [-97.75, 74.65], [-97.5, 74.75], [-96.97, 74.53], [-96.82, 74.18], [-96.47, 74.03], [-96.32, 73.68], 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -8.659867211602858}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.118150849736573}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.866061527929958, -14.390504054378766, -16.062164460843917, -13.693185319283486]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-15.329208921130714, -16.680454480605988, -18.331896586075686, -15.386664341320966]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.895471128727517, -5.3963856586479775, -7.483388855006832, -5.527078595026727]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.120780745280626, -6.425466125716127, -8.659867211602858, -6.354168198726597]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.396094845022182, -1.637657421751534, -2.2921060512851006, -1.696810535283141]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4309251353930432, -1.7771253106252558, -2.5566650610695647, -2.1613094001126183]}}