{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:49.905401", "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-Mar-17_to_2013-Mar-19_292.5_51.0"}, "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": 2013030000576}, "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": "March 17 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 19 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 92330.08598156221}, "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": []}, "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": 51.0}, "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": 292.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "292.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 289.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.03, 52.53], [-70.68, 52.68], [-70.65, 52.75], [-70.75, 53.0], [-70.53, 53.53], [-70.18, 53.68], [-70.03, 54.03], [-69.5, 54.25], [-68.97, 54.03], [-68.82, 53.68], [-68.75, 53.65], [-68.5, 53.75], [-67.97, 53.53], [-67.82, 53.18], [-67.75, 53.15], [-67.5, 53.25], [-66.97, 53.03], [-66.82, 52.68], [-66.75, 52.65], [-66.5, 52.75], [-65.97, 52.53], [-65.82, 52.18], [-65.47, 52.03], [-65.25, 51.5], [-65.35, 51.25], [-65.25, 51.0], [-65.47, 50.47], [-65.82, 50.32], [-65.97, 49.97], [-66.32, 49.82], [-66.47, 49.47], [-67.0, 49.25], [-67.25, 49.35], [-67.32, 49.32], [-67.47, 48.97], [-68.0, 48.75], [-68.53, 48.97], [-68.68, 49.32], [-69.03, 49.47], [-69.18, 49.82], [-69.25, 49.85], [-69.5, 49.75], [-70.03, 49.97], [-70.25, 50.5], [-70.15, 50.75], [-70.18, 50.82], [-70.53, 50.97], [-70.68, 51.32], [-71.03, 51.47], [-71.25, 52.0]]]]}, "2013-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.03, 52.53], [-70.68, 52.68], [-70.65, 52.75], [-70.75, 53.0], [-70.53, 53.53], [-70.18, 53.68], [-70.03, 54.03], [-69.5, 54.25], [-68.97, 54.03], [-68.82, 53.68], [-68.75, 53.65], [-68.5, 53.75], [-67.97, 53.53], [-67.82, 53.18], [-67.75, 53.15], [-67.5, 53.25], [-66.97, 53.03], [-66.82, 52.68], [-66.75, 52.65], [-66.5, 52.75], [-65.97, 52.53], [-65.82, 52.18], [-65.47, 52.03], [-65.25, 51.5], [-65.35, 51.25], [-65.25, 51.0], [-65.47, 50.47], [-65.82, 50.32], [-65.97, 49.97], [-66.32, 49.82], [-66.47, 49.47], [-67.0, 49.25], [-67.25, 49.35], [-67.32, 49.32], [-67.47, 48.97], [-68.0, 48.75], [-68.53, 48.97], [-68.68, 49.32], [-69.03, 49.47], [-69.18, 49.82], [-69.25, 49.85], [-69.5, 49.75], [-70.03, 49.97], [-70.25, 50.5], [-70.15, 50.75], [-70.18, 50.82], [-70.53, 50.97], [-70.68, 51.32], [-71.03, 51.47], [-71.25, 52.0]]]]}, "2013-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, 52.0], [-71.03, 52.53], [-70.68, 52.68], [-70.65, 52.75], [-70.75, 53.0], [-70.53, 53.53], [-70.18, 53.68], [-70.03, 54.03], [-69.5, 54.25], [-68.97, 54.03], [-68.82, 53.68], [-68.75, 53.65], [-68.5, 53.75], [-67.97, 53.53], [-67.82, 53.18], [-67.75, 53.15], [-67.5, 53.25], [-66.97, 53.03], [-66.82, 52.68], [-66.75, 52.65], [-66.5, 52.75], [-65.97, 52.53], [-65.82, 52.18], [-65.47, 52.03], [-65.25, 51.5], [-65.35, 51.25], [-65.25, 51.0], [-65.47, 50.47], [-65.82, 50.32], [-65.97, 49.97], [-66.32, 49.82], [-66.47, 49.47], [-67.0, 49.25], [-67.25, 49.35], [-67.32, 49.32], [-67.47, 48.97], [-68.0, 48.75], [-68.53, 48.97], [-68.68, 49.32], [-69.03, 49.47], [-69.18, 49.82], [-69.25, 49.85], [-69.5, 49.75], [-70.03, 49.97], [-70.25, 50.5], [-70.15, 50.75], [-70.18, 50.82], [-70.53, 50.97], [-70.68, 51.32], [-71.03, 51.47], [-71.25, 52.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.74340743995188}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.653482079134882}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.715388037678736, -21.727880243954218, -19.397722124159714]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.402938147526726, -26.07143056227241, -24.141549946170215]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.366685228331567, -10.776950608139662, -8.81681040093342]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.588793092013447, -11.74340743995188, -10.24190007060892]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.432470929441253, -1.710291132965862, -1.4315982665144587]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5845475399263393, -1.9072821386968504, -1.6358817336856386]}}