{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:40.113977", "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-Feb-28_to_2012-Mar-02_299.5_50.5"}, "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": 2012020001572}, "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": "February 28 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 02 2012"}, "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": 183950.13746657662}, "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", "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": ["Gulf of St. Lawrence", "Labrador Sea", "North Atlantic Ocean"]}, "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": 50.5}, "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": 299.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "299.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 296.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.25}, "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": 53.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.5, 51.75], [-62.25, 51.65], [-62.18, 51.68], [-62.15, 51.75], [-62.25, 52.0], [-62.15, 52.25], [-62.25, 52.5], [-62.03, 53.03], [-61.5, 53.25], [-61.25, 53.15], [-61.0, 53.25], [-60.47, 53.03], [-60.32, 52.68], [-60.25, 52.65], [-60.18, 52.68], [-60.03, 53.03], [-59.5, 53.25], [-58.97, 53.03], [-58.82, 52.68], [-58.75, 52.65], [-58.68, 52.68], [-58.53, 53.03], [-58.0, 53.25], [-57.75, 53.15], [-57.5, 53.25], [-57.25, 53.15], [-57.18, 53.18], [-57.03, 53.53], [-56.5, 53.75], [-55.97, 53.53], [-55.82, 53.18], [-55.47, 53.03], [-55.32, 52.68], [-54.97, 52.53], [-54.75, 52.0], [-54.97, 51.47], [-55.37, 51.3], [-55.32, 51.18], [-55.25, 51.15], [-55.0, 51.25], [-54.47, 51.03], [-54.25, 50.5], [-54.47, 49.97], [-55.0, 49.75], [-55.25, 49.85], [-55.5, 49.75], [-56.03, 49.97], [-56.18, 50.32], [-56.53, 50.47], [-56.7, 50.88], [-57.0, 50.75], [-57.53, 50.97], [-57.68, 51.32], [-57.75, 51.35], [-58.0, 51.25], [-58.25, 51.35], [-58.32, 51.32], [-58.47, 50.97], [-58.82, 50.82], [-58.97, 50.47], [-59.32, 50.32], [-59.47, 49.97], [-60.0, 49.75], [-60.25, 49.85], [-60.5, 49.75], [-60.75, 49.85], [-61.0, 49.75], [-61.25, 49.85], [-61.5, 49.75], [-61.75, 49.85], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.53, 49.97], [-63.75, 50.5], [-63.53, 51.03], [-63.18, 51.18], [-63.03, 51.53], [-62.5, 51.75]]]]}, "2012-02-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.5, 51.75], [-62.25, 51.65], [-62.18, 51.68], [-62.15, 51.75], [-62.25, 52.0], [-62.15, 52.25], [-62.25, 52.5], [-62.03, 53.03], [-61.5, 53.25], [-61.25, 53.15], [-61.0, 53.25], [-60.47, 53.03], [-60.32, 52.68], [-60.25, 52.65], [-60.18, 52.68], [-60.03, 53.03], [-59.5, 53.25], [-58.97, 53.03], [-58.82, 52.68], [-58.75, 52.65], [-58.68, 52.68], [-58.53, 53.03], [-58.0, 53.25], [-57.75, 53.15], [-57.5, 53.25], [-57.25, 53.15], [-57.18, 53.18], [-57.03, 53.53], [-56.5, 53.75], [-55.97, 53.53], [-55.82, 53.18], [-55.75, 53.15], [-55.5, 53.25], [-55.25, 53.15], [-55.0, 53.25], [-54.47, 53.03], [-54.32, 52.68], [-53.97, 52.53], [-53.75, 52.0], [-53.85, 51.75], [-53.75, 51.5], [-53.85, 51.25], [-53.75, 51.0], [-53.85, 50.75], [-53.75, 50.5], [-53.97, 49.97], [-54.32, 49.82], [-54.37, 49.7], [-54.25, 49.65], [-54.0, 49.75], [-53.47, 49.53], [-53.25, 49.0], [-53.35, 48.75], [-53.25, 48.5], [-53.35, 48.25], [-53.25, 48.0], [-53.47, 47.47], [-53.82, 47.32], [-53.97, 46.97], [-54.5, 46.75], [-54.75, 46.85], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.25, 47.5], [-56.15, 47.75], [-56.18, 47.82], [-56.25, 47.85], [-56.5, 47.75], [-57.03, 47.97], [-57.25, 48.5], [-57.15, 48.75], [-57.18, 48.82], [-57.25, 48.85], [-57.5, 48.75], [-58.03, 48.97], [-58.25, 49.5], [-58.03, 50.03], [-57.68, 50.18], [-57.65, 50.25], [-57.75, 50.5], [-57.62, 50.8], [-57.75, 50.85], [-58.0, 50.75], [-58.25, 50.85], [-58.5, 50.75], [-58.75, 50.85], [-58.82, 50.82], [-58.97, 50.47], [-59.32, 50.32], [-59.47, 49.97], [-60.0, 49.75], [-60.25, 49.85], [-60.5, 49.75], [-60.75, 49.85], [-61.0, 49.75], [-61.25, 49.85], [-61.5, 49.75], [-61.75, 49.85], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.53, 49.97], [-63.75, 50.5], [-63.53, 51.03], [-63.18, 51.18], [-63.03, 51.53], [-62.5, 51.75]]]]}, "2012-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.5, 51.75], [-62.25, 51.65], [-62.18, 51.68], [-62.15, 51.75], [-62.25, 52.0], [-62.15, 52.25], [-62.25, 52.5], [-62.03, 53.03], [-61.5, 53.25], [-61.25, 53.15], [-61.0, 53.25], [-60.47, 53.03], [-60.32, 52.68], [-60.25, 52.65], [-60.18, 52.68], [-60.03, 53.03], [-59.5, 53.25], [-58.97, 53.03], [-58.82, 52.68], [-58.75, 52.65], [-58.68, 52.68], [-58.53, 53.03], [-58.0, 53.25], [-57.75, 53.15], [-57.5, 53.25], [-57.25, 53.15], [-57.18, 53.18], [-57.03, 53.53], [-56.5, 53.75], [-55.97, 53.53], [-55.82, 53.18], [-55.75, 53.15], [-55.5, 53.25], [-55.25, 53.15], [-55.0, 53.25], [-54.47, 53.03], [-54.32, 52.68], [-53.97, 52.53], [-53.75, 52.0], [-53.85, 51.75], [-53.75, 51.5], [-53.85, 51.25], [-53.75, 51.0], [-53.85, 50.75], [-53.75, 50.5], [-53.97, 49.97], [-54.32, 49.82], [-54.37, 49.7], [-54.25, 49.65], [-54.0, 49.75], [-53.47, 49.53], [-53.25, 49.0], [-53.35, 48.75], [-53.25, 48.5], [-53.35, 48.25], [-53.25, 48.0], [-53.47, 47.47], [-53.82, 47.32], [-53.97, 46.97], [-54.5, 46.75], [-54.75, 46.85], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.25, 47.5], [-56.15, 47.75], [-56.18, 47.82], [-56.25, 47.85], [-56.5, 47.75], [-57.03, 47.97], [-57.25, 48.5], [-57.15, 48.75], [-57.18, 48.82], [-57.25, 48.85], [-57.5, 48.75], [-58.03, 48.97], [-58.25, 49.5], [-58.03, 50.03], [-57.68, 50.18], [-57.65, 50.25], [-57.75, 50.5], [-57.62, 50.8], [-57.75, 50.85], [-58.0, 50.75], [-58.25, 50.85], [-58.5, 50.75], [-58.75, 50.85], [-58.82, 50.82], [-58.97, 50.47], [-59.32, 50.32], [-59.47, 49.97], [-60.0, 49.75], [-60.25, 49.85], [-60.5, 49.75], [-60.75, 49.85], [-61.0, 49.75], [-61.25, 49.85], [-61.5, 49.75], [-61.75, 49.85], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.53, 49.97], [-63.75, 50.5], [-63.53, 51.03], [-63.18, 51.18], [-63.03, 51.53], [-62.5, 51.75]]]]}, "2012-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.53, 49.97], [-63.75, 50.5], [-63.53, 51.03], [-63.0, 51.25], [-62.75, 51.15], [-62.68, 51.18], [-62.53, 51.53], [-62.0, 51.75], [-61.75, 51.65], [-61.5, 51.75], [-61.25, 51.65], [-61.0, 51.75], [-60.75, 51.65], [-60.5, 51.75], [-60.25, 51.65], [-60.18, 51.68], [-60.03, 52.03], [-59.5, 52.25], [-59.25, 52.15], [-59.0, 52.25], [-58.75, 52.15], [-58.68, 52.18], [-58.53, 52.53], [-58.0, 52.75], [-57.47, 52.53], [-57.32, 52.18], [-57.25, 52.15], [-57.0, 52.25], [-56.75, 52.15], [-56.68, 52.18], [-56.53, 52.53], [-56.18, 52.68], [-56.03, 53.03], [-55.5, 53.25], [-55.25, 53.15], [-55.0, 53.25], [-54.47, 53.03], [-54.32, 52.68], [-53.97, 52.53], [-53.75, 52.0], [-53.85, 51.75], [-53.75, 51.5], [-53.85, 51.25], [-53.75, 51.0], [-53.85, 50.75], [-53.75, 50.5], [-53.97, 49.97], [-54.32, 49.82], [-54.37, 49.7], [-54.25, 49.65], [-54.0, 49.75], [-53.47, 49.53], [-53.25, 49.0], [-53.35, 48.75], [-53.25, 48.5], [-53.35, 48.25], [-53.25, 48.0], [-53.47, 47.47], [-53.82, 47.32], [-53.97, 46.97], [-54.5, 46.75], [-54.75, 46.85], [-55.0, 46.75], [-55.25, 46.85], [-55.5, 46.75], [-56.03, 46.97], [-56.25, 47.5], [-56.15, 47.75], [-56.18, 47.82], [-56.25, 47.85], [-56.5, 47.75], [-57.03, 47.97], [-57.25, 48.5], [-57.15, 48.75], [-57.18, 48.82], [-57.25, 48.85], [-57.5, 48.75], [-58.03, 48.97], [-58.25, 49.5], [-58.03, 50.03], [-57.68, 50.18], [-57.65, 50.25], [-57.75, 50.5], [-57.62, 50.8], [-57.75, 50.85], [-58.0, 50.75], [-58.25, 50.85], [-58.5, 50.75], [-58.75, 50.85], [-58.82, 50.82], [-58.97, 50.47], [-59.32, 50.32], [-59.47, 49.97], [-60.0, 49.75], [-60.25, 49.85], [-60.5, 49.75], [-60.75, 49.85], [-61.0, 49.75], [-61.25, 49.85], [-61.5, 49.75], [-61.75, 49.85], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.53, 49.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.341424810334473}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.59191061032137}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.435757369522406, -17.31052397311487, -19.24533440237238, -15.951180769049188]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.824331523675284, -23.510373689700003, -25.109222132309725, -20.602575590049724]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.975406223508502, -9.079152132873253, -11.037020373963829, -8.72741306914279]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.550594741758829, -11.41611966715493, -12.341424810334473, -10.953682815303665]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4368863055061325, -1.5469792912391969, -1.9118572376212548, -1.5803297044346405]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5143475284714594, -1.7960072567847356, -2.220368207253221, -1.8176237507422306]}}