{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:19.799444", "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": "2012-Jan-14_to_2012-Jan-18_66.5_-73.5"}, "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": 2012010000731}, "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": "January 14 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2012"}, "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": 79975.84175360418}, "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": ["E.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": -73.5}, "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": 66.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "66.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 61.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 73.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -75.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -72.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[65.47, -73.47], [65.82, -73.32], [65.97, -72.97], [66.5, -72.75], [67.03, -72.97], [67.18, -73.32], [67.25, -73.35], [67.5, -73.25], [67.75, -73.35], [68.0, -73.25], [68.25, -73.35], [68.5, -73.25], [68.75, -73.35], [69.0, -73.25], [69.25, -73.35], [69.32, -73.32], [69.47, -72.97], [69.82, -72.82], [69.97, -72.47], [70.5, -72.25], [70.75, -72.35], [71.0, -72.25], [71.53, -72.47], [71.68, -72.82], [71.75, -72.85], [72.0, -72.75], [72.25, -72.85], [72.5, -72.75], [73.03, -72.97], [73.18, -73.32], [73.53, -73.47], [73.68, -73.82], [74.03, -73.97], [74.25, -74.5], [74.15, -74.75], [74.25, -75.0], [74.03, -75.53], [73.5, -75.75], [73.25, -75.65], [73.18, -75.68], [73.03, -76.03], [72.5, -76.25], [72.25, -76.15], [72.0, -76.25], [71.75, -76.15], [71.5, -76.25], [71.25, -76.15], [71.0, -76.25], [70.47, -76.03], [70.32, -75.68], [70.25, -75.65], [70.0, -75.75], [69.75, -75.65], [69.5, -75.75], [69.25, -75.65], [69.0, -75.75], [68.75, -75.65], [68.5, -75.75], [68.25, -75.65], [68.0, -75.75], [67.75, -75.65], [67.5, -75.75], [67.25, -75.65], [67.0, -75.75], [66.75, -75.65], [66.5, -75.75], [65.97, -75.53], [65.82, -75.18], [65.47, -75.03], [65.25, -74.5], [65.35, -74.25], [65.25, -74.0], [65.47, -73.47]]]]}, "2012-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[61.75, -73.5], [61.97, -72.97], [62.5, -72.75], [62.75, -72.85], [62.82, -72.82], [62.97, -72.47], [63.5, -72.25], [63.75, -72.35], [64.0, -72.25], [64.25, -72.35], [64.5, -72.25], [64.75, -72.35], [65.0, -72.25], [65.25, -72.35], [65.5, -72.25], [65.75, -72.35], [66.0, -72.25], [66.25, -72.35], [66.32, -72.32], [66.47, -71.97], [67.0, -71.75], [67.53, -71.97], [67.75, -72.5], [67.54, -73.0], [67.68, -73.32], [67.75, -73.35], [68.0, -73.25], [68.25, -73.35], [68.5, -73.25], [68.75, -73.35], [69.0, -73.25], [69.25, -73.35], [69.32, -73.32], [69.47, -72.97], [69.82, -72.82], [69.97, -72.47], [70.5, -72.25], [70.75, -72.35], [71.0, -72.25], [71.53, -72.47], [71.68, -72.82], [71.75, -72.85], [72.0, -72.75], [72.25, -72.85], [72.5, -72.75], [73.03, -72.97], [73.18, -73.32], [73.53, -73.47], [73.68, -73.82], [74.03, -73.97], [74.25, -74.5], [74.15, -74.75], [74.25, -75.0], [74.03, -75.53], [73.5, -75.75], [73.25, -75.65], [73.18, -75.68], [73.03, -76.03], [72.5, -76.25], [72.25, -76.15], [72.0, -76.25], [71.75, -76.15], [71.5, -76.25], [71.25, -76.15], [71.0, -76.25], [70.47, -76.03], [70.32, -75.68], [70.25, -75.65], [70.0, -75.75], [69.75, -75.65], [69.5, -75.75], [69.25, -75.65], [69.0, -75.75], [68.75, -75.65], [68.5, -75.75], [68.25, -75.65], [68.0, -75.75], [67.75, -75.65], [67.5, -75.75], [67.25, -75.65], [67.0, -75.75], [66.75, -75.65], [66.5, -75.75], [66.0, -75.54], [65.5, -75.75], [65.25, -75.65], [65.0, -75.75], [64.75, -75.65], [64.5, -75.75], [64.25, -75.65], [64.0, -75.75], [63.47, -75.53], [63.32, -75.18], [63.25, -75.15], [63.0, -75.25], [62.75, -75.15], [62.5, -75.25], [62.25, -75.15], [62.0, -75.25], [61.47, -75.03], [61.25, -74.5], [61.47, -73.97], [61.82, -73.82], [61.85, -73.75], [61.75, -73.5]]]]}, "2012-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[61.75, -73.5], [61.97, -72.97], [62.5, -72.75], [62.75, -72.85], [62.82, -72.82], [62.97, -72.47], [63.5, -72.25], [63.75, -72.35], [64.0, -72.25], [64.25, -72.35], [64.5, -72.25], [64.75, -72.35], [65.0, -72.25], [65.25, -72.35], [65.5, -72.25], [65.75, -72.35], [66.0, -72.25], [66.25, -72.35], [66.32, -72.32], [66.47, -71.97], [67.0, -71.75], [67.53, -71.97], [67.75, -72.5], [67.54, -73.0], [67.68, -73.32], [67.75, -73.35], [68.0, -73.25], [68.25, -73.35], [68.5, -73.25], [68.75, -73.35], [69.0, -73.25], [69.25, -73.35], [69.32, -73.32], [69.47, -72.97], [69.82, -72.82], [69.97, -72.47], [70.5, -72.25], [70.75, -72.35], [71.0, -72.25], [71.53, -72.47], [71.68, -72.82], [71.75, -72.85], [72.0, -72.75], [72.25, -72.85], [72.5, -72.75], [73.03, -72.97], [73.18, -73.32], [73.53, -73.47], [73.68, -73.82], [74.03, -73.97], [74.25, -74.5], [74.15, -74.75], [74.25, -75.0], [74.03, -75.53], [73.5, -75.75], [73.25, -75.65], [73.18, -75.68], [73.03, -76.03], [72.5, -76.25], [72.25, -76.15], [72.0, -76.25], [71.75, -76.15], [71.5, -76.25], [71.25, -76.15], [71.0, -76.25], [70.47, -76.03], [70.32, -75.68], [70.25, -75.65], [70.0, -75.75], [69.75, -75.65], [69.5, -75.75], [69.25, -75.65], [69.0, -75.75], [68.75, -75.65], [68.5, -75.75], [68.25, -75.65], [68.0, -75.75], [67.75, -75.65], [67.5, -75.75], [67.25, -75.65], [67.0, -75.75], [66.75, -75.65], [66.5, -75.75], [66.0, -75.54], [65.5, -75.75], [65.25, -75.65], [65.0, -75.75], [64.75, -75.65], [64.5, -75.75], [64.25, -75.65], [64.0, -75.75], [63.47, -75.53], [63.32, -75.18], [63.25, -75.15], [63.0, -75.25], [62.75, -75.15], [62.5, -75.25], [62.25, -75.15], [62.0, -75.25], [61.47, -75.03], [61.25, -74.5], [61.47, -73.97], [61.82, -73.82], [61.85, -73.75], [61.75, -73.5]]]]}, "2012-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[61.75, -73.5], [61.97, -72.97], [62.5, -72.75], [62.75, -72.85], [62.82, -72.82], [62.97, -72.47], [63.5, -72.25], [63.75, -72.35], [64.0, -72.25], [64.25, -72.35], [64.5, -72.25], [64.75, -72.35], [65.0, -72.25], [65.25, -72.35], [65.5, -72.25], [65.75, -72.35], [66.0, -72.25], [66.25, -72.35], [66.32, -72.32], [66.47, -71.97], [67.0, -71.75], [67.53, -71.97], [67.75, -72.5], [67.54, -73.0], [67.75, -73.5], [67.65, -73.75], [67.75, -74.0], [67.53, -74.53], [67.18, -74.68], [67.03, -75.03], [66.5, -75.25], [66.25, -75.15], [66.18, -75.18], [66.03, -75.53], [65.5, -75.75], [65.25, -75.65], [65.0, -75.75], [64.75, -75.65], [64.5, -75.75], [64.25, -75.65], [64.0, -75.75], [63.47, -75.53], [63.32, -75.18], [63.25, -75.15], [63.0, -75.25], [62.75, -75.15], [62.5, -75.25], [62.25, -75.15], [62.0, -75.25], [61.47, -75.03], [61.25, -74.5], [61.47, -73.97], [61.82, -73.82], [61.85, -73.75], [61.75, -73.5]]]]}, "2012-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[63.97, -73.53], [63.75, -73.0], [63.97, -72.47], [64.5, -72.25], [65.03, -72.47], [65.25, -73.0], [65.03, -73.53], [64.5, -73.75], [63.97, -73.53]]], [[[67.0, -71.75], [67.53, -71.97], [67.75, -72.5], [67.54, -73.0], [67.75, -73.5], [67.53, -74.03], [67.0, -74.25], [66.75, -74.15], [66.5, -74.25], [65.97, -74.03], [65.75, -73.5], [65.97, -72.97], [66.38, -72.8], [66.25, -72.5], [66.47, -71.97], [67.0, -71.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.256632227936137}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7697854865623035}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.346775319830243, -19.849233127275426, -19.072366557702736, -17.445960301564327, -13.150262936848264]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.96846778262136, -25.349557113059547, -24.62706720471124, -22.126726043423133, -15.793423035156707]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6326207504784986, -4.499657455945841, -3.5434420371959994, -2.9201473296809826, -2.7553636406431536]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.493854234959798, -5.256632227936137, -4.2523312435649245, -3.570495623916827, -3.051406813895653]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6059994681280039, -2.111296891078108, -1.658179360828718, -1.4127680087180374, -1.255995939494917]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0145267310913315, -2.4111570421075363, -1.9456917041651138, -1.5443532339057764, -1.2895170560888818]}}