{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:32.083380", "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": "2018-Nov-27_to_2018-Nov-29_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": 2018110000843}, "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": "November 27 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2018"}, "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": 252601.1914354011}, "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": 274.75}, "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": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.65, 35.25], [-85.75, 35.5], [-85.53, 36.03], [-85.18, 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33.85], [-83.0, 33.75], [-83.25, 33.85], [-83.32, 33.82], [-83.35, 33.75], [-83.25, 33.5], [-83.47, 32.97], [-84.0, 32.75], [-84.25, 32.85], [-84.5, 32.75], [-85.03, 32.97], [-85.25, 33.5], [-85.15, 33.75], [-85.18, 33.82], [-85.53, 33.97], [-85.75, 34.5], [-85.65, 34.75], [-85.75, 35.0], [-85.65, 35.25]]]]}, "2018-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.65, 35.25], [-85.75, 35.5], [-85.53, 36.03], [-85.18, 36.18], [-85.15, 36.25], [-85.25, 36.5], [-85.15, 36.75], [-85.25, 37.0], [-85.15, 37.25], [-85.25, 37.5], [-85.03, 38.03], [-84.68, 38.18], [-84.65, 38.25], [-84.68, 38.32], [-85.03, 38.47], [-85.25, 39.0], [-85.15, 39.25], [-85.25, 39.5], [-85.15, 39.75], [-85.25, 40.0], [-85.03, 40.53], [-84.68, 40.68], [-84.53, 41.03], [-84.0, 41.25], [-83.75, 41.15], [-83.5, 41.25], [-83.25, 41.15], [-83.0, 41.25], [-82.75, 41.15], [-82.5, 41.25], [-82.25, 41.15], [-82.0, 41.25], [-81.47, 41.03], [-81.32, 40.68], [-80.97, 40.53], [-80.82, 40.18], [-80.75, 40.15], [-80.5, 40.25], [-79.97, 40.03], [-79.82, 39.68], [-79.47, 39.53], [-79.25, 39.0], [-79.35, 38.75], [-79.25, 38.5], [-79.35, 38.25], [-79.25, 38.0], [-79.47, 37.47], [-79.82, 37.32], [-79.85, 37.25], [-79.75, 37.0], [-79.97, 36.47], [-80.5, 36.25], [-80.75, 36.35], [-80.82, 36.32], [-80.97, 35.97], [-81.37, 35.8], [-81.25, 35.5], [-81.35, 35.25], [-81.25, 35.0], [-81.47, 34.47], [-81.82, 34.32], [-81.97, 33.97], [-82.5, 33.75], [-82.75, 33.85], [-83.0, 33.75], [-83.25, 33.85], [-83.32, 33.82], [-83.35, 33.75], [-83.25, 33.5], [-83.47, 32.97], [-84.0, 32.75], [-84.25, 32.85], [-84.5, 32.75], [-85.03, 32.97], [-85.25, 33.5], [-85.15, 33.75], [-85.18, 33.82], [-85.53, 33.97], [-85.75, 34.5], [-85.65, 34.75], [-85.75, 35.0], [-85.65, 35.25]]]]}, "2018-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.65, 35.25], [-85.75, 35.5], [-85.53, 36.03], [-85.18, 36.18], [-85.15, 36.25], [-85.25, 36.5], [-85.15, 36.75], [-85.25, 37.0], [-85.15, 37.25], [-85.25, 37.5], [-85.03, 38.03], [-84.68, 38.18], [-84.65, 38.25], [-84.68, 38.32], [-85.03, 38.47], [-85.25, 39.0], [-85.15, 39.25], [-85.25, 39.5], [-85.15, 39.75], [-85.25, 40.0], [-85.03, 40.53], [-84.68, 40.68], [-84.53, 41.03], [-84.0, 41.25], [-83.75, 41.15], [-83.5, 41.25], [-83.25, 41.15], [-83.0, 41.25], [-82.75, 41.15], [-82.5, 41.25], [-82.25, 41.15], [-82.0, 41.25], [-81.47, 41.03], [-81.32, 40.68], [-80.97, 40.53], [-80.82, 40.18], [-80.75, 40.15], [-80.5, 40.25], [-79.97, 40.03], [-79.82, 39.68], [-79.47, 39.53], [-79.25, 39.0], [-79.35, 38.75], [-79.25, 38.5], [-79.35, 38.25], [-79.25, 38.0], [-79.47, 37.47], [-79.82, 37.32], [-79.85, 37.25], [-79.75, 37.0], [-79.97, 36.47], [-80.5, 36.25], [-80.75, 36.35], [-80.82, 36.32], [-80.97, 35.97], [-81.37, 35.8], [-81.25, 35.5], [-81.35, 35.25], [-81.25, 35.0], [-81.47, 34.47], [-81.82, 34.32], [-81.97, 33.97], [-82.5, 33.75], [-82.75, 33.85], [-83.0, 33.75], [-83.25, 33.85], [-83.32, 33.82], [-83.35, 33.75], [-83.25, 33.5], [-83.47, 32.97], [-84.0, 32.75], [-84.25, 32.85], [-84.5, 32.75], [-85.03, 32.97], [-85.25, 33.5], [-85.15, 33.75], [-85.18, 33.82], [-85.53, 33.97], [-85.75, 34.5], [-85.65, 34.75], [-85.75, 35.0], [-85.65, 35.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.856038125843895}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.0511677403497}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.9870780578985432, -3.7028417562321465, -0.5187166871065756]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.8384328312264415, -9.176371639328693, -4.66639030210348]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.345194082113693, -10.049939164129736, -6.758369974805666]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.95781676381057, -11.856038125843895, -8.433672675876437]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5826075502301038, -2.1679681438453478, -1.4805248880281274]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.011126560954784, -2.5969761238761793, -1.8315393989324815]}}