{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:58.706951", "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": "2011-Mar-25_to_2011-Mar-28_269.0_37.0"}, "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": 2011030001271}, "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 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 28 2011"}, "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": 83320.07071493083}, "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": ["C.North-America", "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": 37.0}, "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": 269.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 266.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 270.75}, "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": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.65, 37.25], [-92.75, 37.5], [-92.53, 38.03], [-92.18, 38.18], [-92.15, 38.25], [-92.25, 38.5], [-92.03, 39.03], [-91.5, 39.25], [-91.25, 39.15], [-91.0, 39.25], [-90.75, 39.15], [-90.5, 39.25], [-90.25, 39.15], [-90.0, 39.25], [-89.47, 39.03], [-89.32, 38.68], [-88.97, 38.53], [-88.75, 38.0], [-88.97, 37.47], [-89.32, 37.32], [-89.35, 37.25], [-89.25, 37.0], [-89.47, 36.47], [-89.82, 36.32], [-89.97, 35.97], [-90.5, 35.75], [-90.75, 35.85], [-91.0, 35.75], [-91.25, 35.85], [-91.5, 35.75], [-91.75, 35.85], [-92.0, 35.75], [-92.53, 35.97], [-92.75, 36.5], [-92.65, 36.75], [-92.75, 37.0], [-92.65, 37.25]]]]}, "2011-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.0, 39.25], [-92.75, 39.15], [-92.5, 39.25], [-92.25, 39.15], [-92.0, 39.25], [-91.75, 39.15], [-91.68, 39.18], [-91.53, 39.53], [-91.0, 39.75], [-90.47, 39.53], [-90.32, 39.18], [-90.25, 39.15], [-90.0, 39.25], [-89.47, 39.03], [-89.32, 38.68], [-88.97, 38.53], [-88.75, 38.0], [-88.97, 37.47], [-89.32, 37.32], [-89.35, 37.25], [-89.25, 37.0], [-89.47, 36.47], [-89.82, 36.32], [-89.97, 35.97], [-90.32, 35.82], [-90.47, 35.47], [-91.0, 35.25], [-91.25, 35.35], [-91.32, 35.32], [-91.47, 34.97], [-92.0, 34.75], [-92.53, 34.97], [-92.75, 35.5], [-92.54, 36.0], [-92.75, 36.5], [-92.65, 36.75], [-92.75, 37.0], [-92.65, 37.25], [-92.68, 37.32], [-92.75, 37.35], [-93.0, 37.25], [-93.25, 37.35], [-93.5, 37.25], [-94.03, 37.47], [-94.25, 38.0], [-94.03, 38.53], [-93.68, 38.68], [-93.53, 39.03], [-93.0, 39.25]]]]}, "2011-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.0, 39.25], [-92.75, 39.15], [-92.5, 39.25], [-92.25, 39.15], [-92.0, 39.25], [-91.75, 39.15], [-91.68, 39.18], [-91.53, 39.53], [-91.0, 39.75], [-90.47, 39.53], [-90.32, 39.18], [-90.25, 39.15], [-90.0, 39.25], [-89.47, 39.03], [-89.32, 38.68], [-88.97, 38.53], [-88.75, 38.0], [-88.97, 37.47], [-89.32, 37.32], [-89.35, 37.25], [-89.25, 37.0], [-89.47, 36.47], [-89.82, 36.32], [-89.97, 35.97], [-90.32, 35.82], [-90.47, 35.47], [-91.0, 35.25], [-91.25, 35.35], [-91.32, 35.32], [-91.47, 34.97], [-92.0, 34.75], [-92.53, 34.97], [-92.75, 35.5], [-92.54, 36.0], [-92.75, 36.5], [-92.65, 36.75], [-92.75, 37.0], [-92.65, 37.25], [-92.68, 37.32], [-92.75, 37.35], [-93.0, 37.25], [-93.25, 37.35], [-93.5, 37.25], [-94.03, 37.47], [-94.25, 38.0], [-94.03, 38.53], [-93.68, 38.68], [-93.53, 39.03], [-93.0, 39.25]]]]}, "2011-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-93.0, 39.25], [-92.75, 39.15], [-92.5, 39.25], [-92.25, 39.15], [-92.0, 39.25], [-91.75, 39.15], [-91.68, 39.18], [-91.53, 39.53], [-91.0, 39.75], [-90.47, 39.53], [-90.25, 39.0], [-90.35, 38.75], [-90.25, 38.5], [-90.35, 38.25], [-90.25, 38.0], [-90.46, 37.5], [-90.25, 37.0], [-90.35, 36.75], [-90.25, 36.5], [-90.35, 36.25], [-90.25, 36.0], [-90.47, 35.47], [-91.0, 35.25], [-91.25, 35.35], [-91.32, 35.32], [-91.47, 34.97], [-92.0, 34.75], [-92.53, 34.97], [-92.75, 35.5], [-92.53, 36.03], [-92.18, 36.18], [-92.15, 36.25], [-92.25, 36.5], [-92.03, 37.03], [-91.68, 37.18], [-91.62, 37.3], [-91.75, 37.35], [-92.0, 37.25], [-92.25, 37.35], [-92.5, 37.25], [-92.75, 37.35], [-93.0, 37.25], [-93.25, 37.35], [-93.5, 37.25], [-94.03, 37.47], [-94.25, 38.0], [-94.03, 38.53], [-93.68, 38.68], [-93.53, 39.03], [-93.0, 39.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.71335371064282}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.042680819659145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.536593156800052, 2.629232400005094, 1.492534000217347, 3.63744645814171]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.492517031245427, 1.1393545457438563, -0.034944974660845673, 2.3514439665779605]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.627435906194428, -7.774590848941915, -9.076088552464286, -7.12767132514246]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.55815712383179, -8.467683018689911, -9.71335371064282, -7.564436942558416]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.41149044289678, -1.438775669448214, -1.6752787943218461, -1.3367098345646422]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.570405393563209, -1.5756135379934575, -1.7360961080153527, -1.4859369502331514]}}