{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:37.621593", "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-Oct-29_to_2012-Nov-01_276.5_35.5"}, "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": 2012100001188}, "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": "October 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 01 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": 95242.28714398929}, "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": ["United States"]}, "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": []}, "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": 35.5}, "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": 276.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "276.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 280.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 34.97], [-84.25, 35.5], [-84.03, 36.03], [-83.5, 36.25], [-83.25, 36.15], [-83.18, 36.18], [-83.12, 36.3], [-83.53, 36.47], [-83.75, 37.0], [-83.53, 37.53], [-83.18, 37.68], [-83.15, 37.75], [-83.25, 38.0], [-83.15, 38.25], [-83.25, 38.5], [-83.15, 38.75], [-83.25, 39.0], [-83.15, 39.25], [-83.25, 39.5], [-83.03, 40.03], [-82.5, 40.25], [-82.25, 40.15], [-82.0, 40.25], [-81.75, 40.15], [-81.5, 40.25], [-81.25, 40.15], [-81.0, 40.25], [-80.75, 40.15], [-80.5, 40.25], [-79.97, 40.03], [-79.75, 39.5], [-79.85, 39.25], [-79.75, 39.0], [-79.85, 38.75], [-79.75, 38.5], [-79.85, 38.25], [-79.75, 38.0], [-79.85, 37.75], [-79.82, 37.68], [-79.47, 37.53], [-79.25, 37.0], [-79.47, 36.47], [-80.0, 36.25], [-80.25, 36.35], [-80.32, 36.32], [-80.47, 35.97], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.32, 35.32], [-82.47, 34.97], [-83.0, 34.75], [-83.25, 34.85], [-83.5, 34.75], [-84.03, 34.97]]]]}, "2012-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 34.97], [-84.25, 35.5], [-84.03, 36.03], [-83.5, 36.25], [-83.25, 36.15], [-83.18, 36.18], [-83.12, 36.3], [-83.53, 36.47], [-83.75, 37.0], [-83.53, 37.53], [-83.18, 37.68], [-83.15, 37.75], [-83.25, 38.0], [-83.15, 38.25], [-83.25, 38.5], [-83.15, 38.75], [-83.25, 39.0], [-83.15, 39.25], [-83.25, 39.5], [-83.03, 40.03], [-82.5, 40.25], [-82.25, 40.15], [-82.0, 40.25], [-81.75, 40.15], [-81.5, 40.25], [-81.25, 40.15], [-81.0, 40.25], [-80.75, 40.15], [-80.5, 40.25], [-79.97, 40.03], [-79.75, 39.5], [-79.85, 39.25], [-79.75, 39.0], [-79.85, 38.75], [-79.75, 38.5], [-79.85, 38.25], [-79.75, 38.0], [-79.85, 37.75], [-79.82, 37.68], [-79.47, 37.53], [-79.25, 37.0], [-79.47, 36.47], [-80.0, 36.25], [-80.25, 36.35], [-80.32, 36.32], [-80.47, 35.97], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.32, 35.32], [-82.47, 34.97], [-83.0, 34.75], [-83.25, 34.85], [-83.5, 34.75], [-84.03, 34.97]]]]}, "2012-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 34.97], [-84.25, 35.5], [-84.03, 36.03], [-83.5, 36.25], [-83.25, 36.15], [-83.18, 36.18], [-83.12, 36.3], [-83.53, 36.47], [-83.75, 37.0], [-83.53, 37.53], [-83.18, 37.68], [-83.15, 37.75], [-83.25, 38.0], [-83.15, 38.25], [-83.25, 38.5], [-83.15, 38.75], [-83.25, 39.0], [-83.15, 39.25], [-83.25, 39.5], [-83.03, 40.03], [-82.5, 40.25], [-82.25, 40.15], [-82.0, 40.25], [-81.75, 40.15], [-81.5, 40.25], [-81.25, 40.15], [-81.0, 40.25], [-80.75, 40.15], [-80.5, 40.25], [-79.97, 40.03], [-79.75, 39.5], [-79.85, 39.25], [-79.75, 39.0], [-79.85, 38.75], [-79.75, 38.5], [-79.85, 38.25], [-79.75, 38.0], [-79.85, 37.75], [-79.82, 37.68], [-79.47, 37.53], [-79.25, 37.0], [-79.47, 36.47], [-80.0, 36.25], [-80.25, 36.35], [-80.32, 36.32], [-80.47, 35.97], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.32, 35.32], [-82.47, 34.97], [-83.0, 34.75], [-83.25, 34.85], [-83.5, 34.75], [-84.03, 34.97]]]]}, "2012-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.5, 36.25], [-82.97, 36.03], [-82.75, 35.5], [-82.97, 34.97], [-83.5, 34.75], [-84.03, 34.97], [-84.25, 35.5], [-84.03, 36.03], [-83.5, 36.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.599967276628206}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.656401485582865}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.985897299529654, 1.5392655405124174, 2.695384271137584, 1.75218918829421]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.121096807547815, -0.5895255709322669, 0.6477083068888305, 1.75218918829421]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.433390251465705, -8.52487813314259, -7.024870815995873, -7.112946475215608]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.861884020775847, -9.599967276628206, -8.041268972253363, -7.112946475215608]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6992191683926596, -1.8720785137258433, -1.4837027335888475, -1.464924610417661]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.976421630255187, -2.0232181133991176, -1.6279164838291076, -1.464924610417661]}}