{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:36.167225", "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-11_to_2012-Feb-13_289.0_52.5"}, "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": 2012020000718}, "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 11 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 13 2012"}, "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": 56276.456184589944}, "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": 52.5}, "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": 289.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 289.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, 50.0], [-74.03, 50.53], [-73.68, 50.68], [-73.65, 50.75], [-73.75, 51.0], [-73.65, 51.25], [-73.75, 51.5], [-73.53, 52.03], [-73.18, 52.18], [-73.15, 52.25], [-73.25, 52.5], [-73.03, 53.03], [-72.5, 53.25], [-72.25, 53.15], [-72.0, 53.25], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-69.97, 53.03], [-69.75, 52.5], [-69.85, 52.25], [-69.75, 52.0], [-69.97, 51.47], [-70.32, 51.32], [-70.35, 51.25], [-70.25, 51.0], [-70.47, 50.47], [-71.0, 50.25], [-71.25, 50.35], [-71.5, 50.25], [-71.75, 50.35], [-71.82, 50.32], [-71.97, 49.97], [-72.32, 49.82], [-72.35, 49.75], [-72.25, 49.5], [-72.35, 49.25], [-72.25, 49.0], [-72.47, 48.47], [-73.0, 48.25], [-73.25, 48.35], [-73.5, 48.25], [-73.75, 48.35], [-74.0, 48.25], [-74.53, 48.47], [-74.75, 49.0], [-74.53, 49.53], [-74.18, 49.68], [-74.15, 49.75], [-74.25, 50.0]]]]}, "2012-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, 50.0], [-74.03, 50.53], [-73.68, 50.68], [-73.65, 50.75], [-73.75, 51.0], [-73.65, 51.25], [-73.75, 51.5], [-73.53, 52.03], [-73.18, 52.18], [-73.15, 52.25], [-73.25, 52.5], [-73.03, 53.03], [-72.5, 53.25], [-72.25, 53.15], [-72.0, 53.25], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-69.97, 53.03], [-69.75, 52.5], [-69.85, 52.25], [-69.75, 52.0], [-69.97, 51.47], [-70.32, 51.32], [-70.35, 51.25], [-70.25, 51.0], [-70.47, 50.47], [-71.0, 50.25], [-71.25, 50.35], [-71.5, 50.25], [-71.75, 50.35], [-71.82, 50.32], [-71.97, 49.97], [-72.32, 49.82], [-72.35, 49.75], [-72.25, 49.5], [-72.35, 49.25], [-72.25, 49.0], [-72.47, 48.47], [-73.0, 48.25], [-73.25, 48.35], [-73.5, 48.25], [-73.75, 48.35], [-74.0, 48.25], [-74.53, 48.47], [-74.75, 49.0], [-74.53, 49.53], [-74.18, 49.68], [-74.15, 49.75], [-74.25, 50.0]]]]}, "2012-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.25, 50.0], [-74.03, 50.53], [-73.68, 50.68], [-73.65, 50.75], [-73.75, 51.0], [-73.65, 51.25], [-73.75, 51.5], [-73.53, 52.03], [-73.18, 52.18], [-73.15, 52.25], [-73.25, 52.5], [-73.03, 53.03], [-72.5, 53.25], [-72.25, 53.15], [-72.0, 53.25], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-69.97, 53.03], [-69.75, 52.5], [-69.85, 52.25], [-69.75, 52.0], [-69.97, 51.47], [-70.32, 51.32], [-70.35, 51.25], [-70.25, 51.0], [-70.47, 50.47], [-71.0, 50.25], [-71.25, 50.35], [-71.5, 50.25], [-71.75, 50.35], [-71.82, 50.32], [-71.97, 49.97], [-72.32, 49.82], [-72.35, 49.75], [-72.25, 49.5], [-72.35, 49.25], [-72.25, 49.0], [-72.47, 48.47], [-73.0, 48.25], [-73.25, 48.35], [-73.5, 48.25], [-73.75, 48.35], [-74.0, 48.25], [-74.53, 48.47], [-74.75, 49.0], [-74.53, 49.53], [-74.18, 49.68], [-74.15, 49.75], [-74.25, 50.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.485319002410648}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.094677315515792}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-28.402788360369442, -28.80937853811679, -29.021182428937777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-30.67934641914698, -32.73918489498445, -31.622580321469997]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.436333354335135, -9.115075630522256, -9.732622961689984]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.12466909442486, -10.485319002410648, -10.244498445952445]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2917936024407983, -1.3826053659225714, -1.4461019871468592]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3722551679335968, -1.5996634123116715, -1.5045198420801769]}}