{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:30.241430", "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": "2015-Mar-18_to_2015-Mar-20_289.5_41.5"}, "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": 2015030000717}, "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 18 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2015"}, "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": 153472.55999888104}, "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": ["North Atlantic Ocean"]}, "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": 41.5}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 293.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.03, 41.47], [-73.25, 42.0], [-73.03, 42.53], [-72.5, 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40.35], [-71.5, 40.25], [-72.03, 40.47], [-72.25, 41.0], [-72.15, 41.25], [-72.18, 41.32], [-72.25, 41.35], [-72.5, 41.25], [-73.03, 41.47]], [[-69.68, 43.18], [-69.62, 43.3], [-69.75, 43.35], [-69.82, 43.32], [-69.85, 43.25], [-69.8, 43.12], [-69.68, 43.18]]]]}, "2015-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.03, 41.47], [-73.25, 42.0], [-73.03, 42.53], [-72.5, 42.75], [-72.25, 42.65], [-72.0, 42.75], [-71.7, 42.62], [-71.53, 43.03], [-71.18, 43.18], [-71.15, 43.25], [-71.25, 43.5], [-71.15, 43.75], [-71.25, 44.0], [-71.03, 44.53], [-70.5, 44.75], [-70.25, 44.65], [-70.0, 44.75], [-69.75, 44.65], [-69.5, 44.75], [-69.25, 44.65], [-69.18, 44.68], [-69.03, 45.03], [-68.5, 45.25], [-68.25, 45.15], [-68.0, 45.25], [-67.75, 45.15], [-67.5, 45.25], [-66.97, 45.03], [-66.82, 44.68], [-66.47, 44.53], [-66.25, 44.0], [-66.35, 43.75], [-66.25, 43.5], [-66.35, 43.25], [-66.32, 43.18], [-65.97, 43.03], [-65.75, 42.5], [-65.97, 41.97], [-66.5, 41.75], [-66.75, 41.85], [-66.82, 41.82], [-66.85, 41.75], [-66.82, 41.68], [-66.47, 41.53], [-66.25, 41.0], [-66.47, 40.47], [-67.0, 40.25], [-67.25, 40.35], [-67.32, 40.32], [-67.47, 39.97], [-68.0, 39.75], [-68.25, 39.85], [-68.32, 39.82], [-68.47, 39.47], [-69.0, 39.25], [-69.25, 39.35], [-69.5, 39.25], [-69.75, 39.35], [-70.0, 39.25], [-70.53, 39.47], [-70.68, 39.82], [-71.03, 39.97], [-71.18, 40.32], [-71.25, 40.35], [-71.5, 40.25], [-72.03, 40.47], [-72.25, 41.0], [-72.15, 41.25], [-72.18, 41.32], [-72.25, 41.35], [-72.5, 41.25], [-73.03, 41.47]], [[-69.68, 43.18], [-69.62, 43.3], [-69.75, 43.35], [-69.82, 43.32], [-69.85, 43.25], [-69.8, 43.12], [-69.68, 43.18]]]]}, "2015-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.03, 41.47], [-73.25, 42.0], [-73.03, 42.53], [-72.5, 42.75], [-72.25, 42.65], [-72.0, 42.75], [-71.7, 42.62], [-71.53, 43.03], [-71.18, 43.18], [-71.15, 43.25], [-71.25, 43.5], [-71.15, 43.75], [-71.25, 44.0], [-71.03, 44.53], [-70.5, 44.75], [-70.25, 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[-69.82, 43.32], [-69.85, 43.25], [-69.8, 43.12], [-69.68, 43.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.563579475176027}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.149491970501223}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.1035067710922135, -3.601342159016326, -1.450349841341449]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.08945519938311, -8.112460355112603, -6.227926141798434]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.801342170760042, -6.4072461964197585, -4.2398875443238815]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.035285856923508, -8.563579475176027, -8.503783269242831]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6920958349737765, -2.3626030907365974, -1.4903774763626958]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9895257533823416, -2.650830620739756, -1.8967176207566805]}}