{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:27.289902", "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": "2017-Jul-15_to_2017-Jul-19_274.0_-78.5"}, "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": 2017070000612}, "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": "July 15 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 50591.7640092304}, "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": ["Antarctica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": -78.5}, "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": 274.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "274.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 276.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -81.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -77.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.75, -78.0], [-87.53, -77.47], [-87.0, -77.25], [-86.75, -77.35], [-86.68, -77.32], [-86.53, -76.97], [-86.0, -76.75], [-85.75, -76.85], [-85.5, -76.75], [-84.97, -76.97], [-84.82, -77.32], [-84.47, -77.47], [-84.32, -77.82], [-83.97, -77.97], [-83.75, -78.5], [-83.97, -79.03], [-84.5, -79.25], [-84.75, -79.15], [-85.0, -79.25], [-85.25, -79.15], [-85.5, -79.25], [-85.75, -79.15], [-86.0, -79.25], [-86.25, -79.15], [-86.5, -79.25], [-87.03, -79.03], [-87.18, -78.68], [-87.53, -78.53], [-87.75, -78.0]]]]}, "2017-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.5, -79.75], [-100.25, -79.85], [-100.0, -79.75], [-99.75, -79.85], [-99.5, -79.75], [-99.25, -79.85], [-99.0, -79.75], [-98.75, -79.85], [-98.5, -79.75], [-98.25, -79.85], [-98.0, -79.75], [-97.75, -79.85], [-97.5, -79.75], [-97.25, -79.85], [-97.18, -79.82], [-97.03, -79.47], [-96.5, -79.25], [-96.25, -79.35], [-96.0, -79.25], [-95.75, -79.35], [-95.5, -79.25], [-95.25, -79.35], [-95.0, -79.25], [-94.75, -79.35], [-94.5, -79.25], [-94.25, -79.35], [-94.0, -79.25], [-93.75, -79.35], [-93.68, -79.32], [-93.53, -78.97], [-93.0, -78.75], [-92.75, -78.85], [-92.5, -78.75], [-92.25, -78.85], [-92.18, -78.82], [-92.03, -78.47], [-91.5, -78.25], [-91.25, -78.35], [-91.0, -78.25], [-90.75, -78.35], [-90.5, -78.25], [-90.25, -78.35], [-90.18, -78.32], [-90.03, -77.97], [-89.5, -77.75], [-88.97, -77.97], [-88.82, -78.32], [-88.75, -78.35], [-88.5, -78.25], [-88.25, -78.35], [-88.0, -78.25], [-87.75, -78.35], [-87.62, -78.3], [-87.75, -78.0], [-87.53, -77.47], [-87.0, -77.25], [-86.75, -77.35], [-86.68, -77.32], [-86.53, -76.97], [-86.0, -76.75], [-85.75, -76.85], [-85.5, -76.75], [-84.97, -76.97], [-84.82, -77.32], [-84.47, -77.47], [-84.32, -77.82], [-83.97, -77.97], [-83.82, -78.32], [-83.47, -78.47], [-83.32, -78.82], [-82.97, -78.97], [-82.75, -79.5], [-82.97, -80.03], [-83.5, -80.25], [-83.75, -80.15], [-84.0, -80.25], [-84.5, -80.04], [-85.0, -80.25], [-85.25, -80.15], [-85.5, -80.25], [-85.75, -80.15], [-86.0, -80.25], [-86.25, -80.15], [-86.5, -80.25], [-86.75, -80.15], [-87.0, -80.25], [-87.25, -80.15], [-87.5, -80.25], [-87.75, -80.15], [-87.82, -80.18], [-87.97, -80.53], [-88.5, -80.75], [-88.75, -80.65], [-89.0, -80.75], [-89.25, -80.65], [-89.5, -80.75], [-89.75, -80.65], [-90.0, -80.75], [-90.25, -80.65], [-90.5, -80.75], [-90.75, -80.65], [-90.82, -80.68], [-90.97, -81.03], [-91.5, -81.25], [-91.75, -81.15], [-92.0, -81.25], [-92.25, -81.15], [-92.5, -81.25], [-92.75, -81.15], [-93.0, -81.25], [-93.25, -81.15], [-93.5, -81.25], [-93.75, -81.15], [-94.0, -81.25], [-94.25, -81.15], [-94.5, -81.25], [-94.75, -81.15], [-95.0, -81.25], [-95.25, -81.15], [-95.5, -81.25], [-95.75, -81.15], [-96.0, -81.25], [-96.25, -81.15], [-96.5, -81.25], [-96.75, -81.15], [-97.0, -81.25], [-97.25, -81.15], [-97.32, -81.18], [-97.47, -81.53], [-98.0, -81.75], [-98.25, -81.65], [-98.5, -81.75], [-98.75, -81.65], [-99.0, -81.75], [-99.25, -81.65], [-99.5, -81.75], [-99.75, -81.65], [-100.0, -81.75], [-100.25, -81.65], [-100.5, -81.75], [-100.75, -81.65], [-101.0, -81.75], [-101.53, -81.53], [-101.75, -81.0], [-101.53, -80.47], [-101.18, -80.32], [-101.03, -79.97], [-100.5, -79.75]]]]}, "2017-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.5, -79.75], [-100.25, -79.85], [-100.0, -79.75], [-99.75, -79.85], [-99.5, -79.75], [-99.25, -79.85], [-99.0, -79.75], [-98.75, -79.85], [-98.5, -79.75], [-98.25, -79.85], [-98.0, -79.75], [-97.75, -79.85], [-97.5, -79.75], [-97.25, -79.85], [-97.18, -79.82], [-97.03, -79.47], [-96.5, -79.25], [-96.25, -79.35], [-96.0, -79.25], [-95.75, -79.35], [-95.5, -79.25], [-95.25, -79.35], [-95.0, -79.25], [-94.75, -79.35], [-94.5, -79.25], [-94.25, -79.35], [-94.0, -79.25], [-93.75, -79.35], [-93.68, -79.32], [-93.53, -78.97], [-93.0, -78.75], [-92.75, -78.85], [-92.5, -78.75], [-92.25, -78.85], [-92.18, -78.82], [-92.03, -78.47], [-91.5, -78.25], [-91.25, -78.35], [-91.0, -78.25], [-90.75, -78.35], [-90.5, -78.25], [-90.25, -78.35], [-90.18, -78.32], [-90.03, -77.97], [-89.5, -77.75], [-88.97, -77.97], [-88.82, -78.32], [-88.75, -78.35], [-88.5, -78.25], [-88.25, -78.35], [-88.0, -78.25], [-87.75, -78.35], [-87.62, -78.3], [-87.75, -78.0], [-87.53, -77.47], [-87.0, -77.25], [-86.75, -77.35], [-86.68, -77.32], [-86.53, -76.97], [-86.0, -76.75], [-85.75, -76.85], [-85.5, -76.75], [-84.97, -76.97], [-84.82, -77.32], [-84.47, -77.47], [-84.32, -77.82], [-83.97, -77.97], [-83.82, -78.32], [-83.47, -78.47], [-83.32, -78.82], [-82.97, -78.97], [-82.75, -79.5], [-82.97, -80.03], [-83.5, -80.25], [-83.75, -80.15], [-84.0, -80.25], [-84.5, -80.04], [-85.0, -80.25], [-85.25, -80.15], [-85.5, -80.25], [-85.75, -80.15], [-86.0, -80.25], [-86.25, -80.15], [-86.5, -80.25], [-86.75, -80.15], [-87.0, -80.25], [-87.25, -80.15], [-87.5, -80.25], [-87.75, -80.15], [-87.82, -80.18], [-87.97, -80.53], [-88.5, -80.75], [-88.75, -80.65], [-89.0, -80.75], [-89.25, -80.65], [-89.5, -80.75], [-89.75, -80.65], [-90.0, -80.75], [-90.25, -80.65], [-90.5, -80.75], [-90.75, -80.65], [-90.82, -80.68], [-90.97, -81.03], [-91.5, -81.25], [-91.75, -81.15], [-92.0, -81.25], [-92.25, -81.15], [-92.5, -81.25], [-92.75, -81.15], [-93.0, -81.25], [-93.25, -81.15], [-93.5, -81.25], [-93.75, -81.15], [-94.0, -81.25], [-94.25, -81.15], [-94.5, -81.25], [-94.75, -81.15], [-95.0, -81.25], [-95.25, -81.15], [-95.5, -81.25], [-95.75, -81.15], [-96.0, -81.25], [-96.25, -81.15], [-96.5, -81.25], [-96.75, -81.15], [-97.0, -81.25], [-97.25, -81.15], [-97.32, -81.18], [-97.47, -81.53], [-98.0, -81.75], [-98.25, -81.65], [-98.5, -81.75], [-98.75, -81.65], [-99.0, -81.75], [-99.25, -81.65], [-99.5, -81.75], [-99.75, -81.65], [-100.0, -81.75], [-100.25, -81.65], [-100.5, -81.75], [-100.75, -81.65], [-101.0, -81.75], [-101.53, -81.53], [-101.75, -81.0], [-101.53, -80.47], [-101.18, -80.32], [-101.03, -79.97], [-100.5, -79.75]]]]}, "2017-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.5, -79.75], [-100.25, -79.85], [-100.0, -79.75], [-99.75, -79.85], [-99.5, -79.75], [-99.25, -79.85], [-99.0, -79.75], [-98.75, -79.85], [-98.5, -79.75], [-98.25, -79.85], [-98.0, -79.75], [-97.75, -79.85], [-97.5, -79.75], [-97.25, -79.85], [-97.18, -79.82], [-97.03, -79.47], [-96.5, -79.25], [-96.25, -79.35], [-96.0, -79.25], [-95.75, -79.35], [-95.5, -79.25], [-95.25, -79.35], [-95.0, -79.25], [-94.75, -79.35], [-94.5, -79.25], [-94.25, -79.35], [-94.0, -79.25], [-93.75, -79.35], [-93.68, -79.32], [-93.53, -78.97], [-93.0, -78.75], [-92.75, -78.85], [-92.5, -78.75], [-92.25, -78.85], [-92.18, -78.82], [-92.03, -78.47], [-91.5, -78.25], [-91.25, -78.35], [-91.0, -78.25], [-90.75, -78.35], [-90.5, -78.25], [-90.25, -78.35], [-90.18, -78.32], [-90.03, -77.97], [-89.5, -77.75], [-88.97, -77.97], [-88.82, -78.32], [-88.75, -78.35], [-88.5, -78.25], [-88.25, -78.35], [-88.0, -78.25], [-87.75, -78.35], [-87.5, -78.25], [-87.25, -78.35], [-87.0, -78.25], [-86.75, -78.35], [-86.5, -78.25], [-86.25, -78.35], [-86.0, -78.25], [-85.75, -78.35], [-85.5, -78.25], [-85.25, -78.35], [-85.0, -78.25], [-84.75, -78.35], [-84.5, -78.25], [-84.25, -78.35], [-84.0, -78.25], [-83.47, -78.47], [-83.32, -78.82], [-82.97, -78.97], [-82.75, -79.5], [-82.97, -80.03], [-83.5, -80.25], [-83.75, -80.15], [-84.0, -80.25], [-84.5, -80.04], [-85.0, -80.25], [-85.25, -80.15], [-85.5, -80.25], [-85.75, -80.15], [-86.0, -80.25], [-86.25, -80.15], [-86.5, -80.25], [-86.75, -80.15], [-87.0, -80.25], [-87.25, -80.15], [-87.5, -80.25], [-87.75, -80.15], [-87.82, -80.18], [-87.97, -80.53], [-88.5, -80.75], [-88.75, -80.65], [-89.0, -80.75], [-89.25, -80.65], [-89.5, -80.75], [-89.75, -80.65], [-90.0, -80.75], [-90.25, -80.65], [-90.5, -80.75], [-90.75, -80.65], [-90.82, -80.68], [-90.97, -81.03], [-91.5, -81.25], [-91.75, -81.15], [-92.0, -81.25], [-92.25, -81.15], [-92.5, -81.25], [-92.75, -81.15], [-93.0, -81.25], [-93.25, -81.15], [-93.5, -81.25], [-93.75, -81.15], [-94.0, -81.25], [-94.25, -81.15], [-94.5, -81.25], [-94.75, -81.15], [-95.0, -81.25], [-95.25, -81.15], [-95.5, -81.25], [-95.75, -81.15], [-96.0, -81.25], [-96.25, -81.15], [-96.5, -81.25], [-96.75, -81.15], [-97.0, -81.25], [-97.25, -81.15], [-97.32, -81.18], [-97.47, -81.53], [-98.0, -81.75], [-98.25, -81.65], [-98.5, -81.75], [-98.75, -81.65], [-99.0, -81.75], [-99.25, -81.65], [-99.5, -81.75], [-99.75, -81.65], [-100.0, -81.75], [-100.25, -81.65], [-100.5, -81.75], [-100.75, -81.65], [-101.0, -81.75], [-101.53, -81.53], [-101.75, -81.0], [-101.53, -80.47], [-101.18, -80.32], [-101.03, -79.97], [-100.5, -79.75]]]]}, "2017-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.0, -78.75], [-84.47, -78.97], [-84.25, -79.5], [-84.47, -80.03], [-85.0, -80.25], [-85.53, -80.03], [-85.75, -79.5], [-85.53, -78.97], [-85.0, -78.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.135693086389637}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.940871051480475}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-35.8583345648278, -42.72972032347988, -44.191765283082276, -44.062232134749905, -42.087732295173026]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-39.98873008188738, -44.798705180997075, -46.298268831448695, -46.30869823818253, -42.087732295173026]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.098534729349687, -8.628872392000694, -9.820374148091473, -8.596273127904423, -6.629239100615678]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.26277915297257, -10.927140056590645, -13.135693086389637, -10.265256520784448, -6.629239100615678]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5113119269227546, -1.5435006928858925, -1.7397300726157239, -1.4694727791938027, -1.2175149931614064]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6889359097517134, -2.191666313956652, -2.5033884070666463, -1.7915227201543105, -1.2175149931614064]}}