{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:09.535879", "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": "2013-Aug-24_to_2013-Aug-27_277.5_33.0"}, "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": 2013080001073}, "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": "August 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 27 2013"}, "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": 84727.00302647449}, "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": 33.0}, "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": 277.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.5\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": 283.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 32.47], [-83.75, 33.0], [-83.53, 33.53], [-83.0, 33.75], [-82.75, 33.65], [-82.5, 33.75], [-81.97, 33.53], [-81.75, 33.0], [-81.97, 32.47], [-82.5, 32.25], [-82.75, 32.35], [-83.0, 32.25], [-83.53, 32.47]]]]}, "2013-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 33.5], [-84.03, 34.03], [-83.5, 34.25], [-83.25, 34.15], [-83.0, 34.25], [-82.75, 34.15], [-82.5, 34.25], [-82.25, 34.15], [-82.18, 34.18], [-82.03, 34.53], [-81.5, 34.75], [-81.25, 34.65], [-81.0, 34.75], [-80.75, 34.65], [-80.68, 34.68], [-80.53, 35.03], [-80.0, 35.25], [-79.75, 35.15], [-79.5, 35.25], [-79.25, 35.15], [-79.18, 35.18], [-79.03, 35.53], [-78.5, 35.75], [-78.0, 35.54], [-77.5, 35.75], [-77.25, 35.65], [-77.0, 35.75], [-76.47, 35.53], [-76.32, 35.18], [-75.97, 35.03], [-75.75, 34.5], [-75.97, 33.97], [-76.5, 33.75], [-77.03, 33.97], [-77.18, 34.32], [-77.25, 34.35], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.85, 33.25], [-78.75, 33.0], [-78.97, 32.47], [-79.5, 32.25], [-80.0, 32.46], [-80.5, 32.25], [-80.75, 32.35], [-81.0, 32.25], [-81.25, 32.35], [-81.5, 32.25], [-81.75, 32.35], [-82.0, 32.25], [-82.25, 32.35], [-82.5, 32.25], [-82.75, 32.35], [-83.0, 32.25], [-83.53, 32.47], [-83.68, 32.82], [-84.03, 32.97], [-84.25, 33.5]]]]}, "2013-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 33.5], [-84.03, 34.03], [-83.5, 34.25], [-83.25, 34.15], [-83.0, 34.25], [-82.75, 34.15], [-82.5, 34.25], [-82.25, 34.15], [-82.18, 34.18], [-82.03, 34.53], [-81.5, 34.75], [-81.25, 34.65], [-81.0, 34.75], [-80.75, 34.65], [-80.68, 34.68], [-80.53, 35.03], [-80.0, 35.25], [-79.75, 35.15], [-79.5, 35.25], [-79.25, 35.15], [-79.18, 35.18], [-79.03, 35.53], [-78.5, 35.75], [-78.0, 35.54], [-77.5, 35.75], [-77.25, 35.65], [-77.0, 35.75], [-76.47, 35.53], [-76.32, 35.18], [-75.97, 35.03], [-75.75, 34.5], [-75.97, 33.97], [-76.5, 33.75], [-77.03, 33.97], [-77.18, 34.32], [-77.25, 34.35], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.85, 33.25], [-78.75, 33.0], [-78.97, 32.47], [-79.5, 32.25], [-80.0, 32.46], [-80.5, 32.25], [-80.75, 32.35], [-81.0, 32.25], [-81.25, 32.35], [-81.5, 32.25], [-81.75, 32.35], [-82.0, 32.25], [-82.25, 32.35], [-82.5, 32.25], [-82.75, 32.35], [-83.0, 32.25], [-83.53, 32.47], [-83.68, 32.82], [-84.03, 32.97], [-84.25, 33.5]]]]}, "2013-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 33.5], [-84.03, 34.03], [-83.5, 34.25], [-83.25, 34.15], [-83.0, 34.25], [-82.75, 34.15], [-82.5, 34.25], [-82.25, 34.15], [-82.18, 34.18], [-82.03, 34.53], [-81.5, 34.75], [-81.25, 34.65], [-81.0, 34.75], [-80.75, 34.65], [-80.68, 34.68], [-80.53, 35.03], [-80.0, 35.25], [-79.75, 35.15], [-79.5, 35.25], [-79.25, 35.15], [-79.18, 35.18], [-79.03, 35.53], [-78.5, 35.75], [-78.0, 35.54], [-77.5, 35.75], [-77.25, 35.65], [-77.0, 35.75], [-76.47, 35.53], [-76.32, 35.18], [-75.97, 35.03], [-75.75, 34.5], [-75.97, 33.97], [-76.5, 33.75], [-77.03, 33.97], [-77.18, 34.32], [-77.25, 34.35], [-77.32, 34.32], [-77.35, 34.25], [-77.25, 34.0], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.5, 33.25], [-78.75, 33.35], [-78.82, 33.32], [-78.85, 33.25], [-78.75, 33.0], [-78.97, 32.47], [-79.5, 32.25], [-80.0, 32.46], [-80.5, 32.25], [-80.75, 32.35], [-81.0, 32.25], [-81.25, 32.35], [-81.5, 32.25], [-81.75, 32.35], [-82.0, 32.25], [-82.25, 32.35], [-82.5, 32.25], [-82.75, 32.35], [-83.0, 32.25], [-83.53, 32.47], [-83.68, 32.82], [-84.03, 32.97], [-84.25, 33.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.695496714106298}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.941435316666423}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.07996542184651, 23.13730715547183, 22.117342390178806, 23.2274798315633]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.047134658519838, 21.674947854352126, 20.3981594685784, 22.199255144678887]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4898284842425653, -2.65919461522104, -3.6479625289363615, -2.544518916897859]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6576142238579337, -3.4430526929247094, -4.695496714106298, -3.1680843539619445]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3987778046787502, -1.682904227097568, -2.3650903902528717, -1.649238524929995]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4614166808248017, -1.9723937522834696, -2.679225242039681, -1.9117457742742987]}}