{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:05.243189", "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-Jan-13_to_2015-Jan-17_70.0_-74.5"}, "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": 2015010000669}, "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 13 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 17 2015"}, "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": 137029.5190318065}, "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": -74.5}, "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": 70.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "70.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 64.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 79.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -76.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -71.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[68.97, -75.03], [68.75, -74.5], [68.97, -73.97], [69.5, -73.75], [69.75, -73.85], [70.0, -73.75], [70.53, -73.97], [70.75, -74.5], [70.53, -75.03], [70.0, -75.25], [69.75, -75.15], [69.5, -75.25], [68.97, -75.03]]]]}, "2015-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[63.97, -73.47], [64.5, -73.25], [64.75, -73.35], [64.82, -73.32], [64.97, -72.97], [65.5, -72.75], [65.75, -72.85], [66.0, -72.75], [66.53, -72.97], [66.68, -73.32], [66.75, -73.35], [67.0, -73.25], [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], [68.82, -73.32], [68.97, -72.97], [69.38, -72.8], [69.25, -72.5], [69.47, -71.97], [69.82, -71.82], [69.97, -71.47], [70.32, -71.32], [70.47, -70.97], [71.0, -70.75], [71.25, -70.85], [71.5, -70.75], [71.75, -70.85], [72.0, -70.75], [72.53, -70.97], [72.75, -71.5], [72.65, -71.75], [72.68, -71.82], [72.75, -71.85], [73.0, -71.75], [73.53, -71.97], [73.68, -72.32], [73.75, -72.35], [74.0, -72.25], [74.53, -72.47], [74.75, -73.0], [74.65, -73.25], [74.68, -73.32], [75.03, -73.47], [75.18, -73.82], [75.53, -73.97], [75.75, -74.5], [75.65, -74.75], [75.75, -75.0], [75.53, -75.53], [75.18, -75.68], [75.15, -75.75], [75.25, -76.0], [75.03, -76.53], [74.5, -76.75], [74.25, -76.65], [74.18, -76.68], [74.03, -77.03], [73.5, -77.25], [73.25, -77.15], [73.0, -77.25], [72.75, -77.15], [72.5, -77.25], [71.97, -77.03], [71.82, -76.68], [71.75, -76.65], [71.5, -76.75], [71.25, -76.65], [71.0, -76.75], [70.75, -76.65], [70.5, -76.75], [70.25, -76.65], [70.0, -76.75], [69.75, -76.65], [69.5, -76.75], [69.25, -76.65], [69.0, -76.75], [68.75, -76.65], [68.5, -76.75], [68.25, -76.65], [68.0, -76.75], [67.75, -76.65], [67.5, -76.75], [66.97, -76.53], [66.82, -76.18], [66.75, -76.15], [66.5, -76.25], [66.25, -76.15], [66.0, -76.25], [65.47, -76.03], [65.32, -75.68], [65.25, -75.65], [65.0, -75.75], [64.47, -75.53], [64.32, -75.18], [63.97, -75.03], [63.75, -74.5], [63.85, -74.25], [63.75, -74.0], [63.97, -73.47]]]]}, "2015-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[63.97, -73.47], [64.5, -73.25], [64.75, -73.35], [64.82, -73.32], [64.97, -72.97], [65.5, -72.75], [65.75, -72.85], [66.0, -72.75], [66.53, -72.97], [66.68, -73.32], [66.75, -73.35], [67.0, -73.25], [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], [68.82, -73.32], [68.97, -72.97], [69.38, -72.8], [69.25, -72.5], [69.47, -71.97], [69.82, -71.82], [69.97, -71.47], [70.32, -71.32], [70.47, -70.97], [71.0, -70.75], [71.25, -70.85], [71.5, -70.75], [71.75, -70.85], [72.0, -70.75], [72.53, -70.97], [72.75, -71.5], [72.65, -71.75], [72.68, -71.82], [72.75, -71.85], [73.0, -71.75], [73.53, -71.97], [73.68, -72.32], [73.75, -72.35], [74.0, -72.25], [74.53, -72.47], [74.75, -73.0], [74.65, -73.25], [74.68, -73.32], [74.75, -73.35], [75.0, -73.25], [75.53, -73.47], [75.68, -73.82], [75.75, -73.85], [76.0, -73.75], [76.53, -73.97], [76.68, -74.32], [77.03, -74.47], [77.18, -74.82], [77.25, -74.85], [77.5, -74.75], [77.75, -74.85], [78.0, -74.75], [78.25, -74.85], [78.5, -74.75], [78.75, -74.85], [79.0, -74.75], [79.53, -74.97], [79.75, -75.5], [79.65, -75.75], [79.75, -76.0], [79.53, -76.53], [79.18, -76.68], [79.03, -77.03], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.75, -77.15], [75.5, -77.25], [75.25, -77.15], [75.0, -77.25], [74.75, -77.15], [74.5, -77.25], [74.25, -77.15], [74.0, -77.25], [73.75, -77.15], [73.5, -77.25], [73.25, -77.15], [73.0, -77.25], [72.75, -77.15], [72.5, -77.25], [71.97, -77.03], [71.82, -76.68], [71.75, -76.65], [71.5, -76.75], [71.25, -76.65], [71.0, -76.75], [70.75, -76.65], [70.5, -76.75], [70.25, -76.65], [70.0, -76.75], [69.75, -76.65], [69.5, -76.75], [69.25, -76.65], [69.0, -76.75], [68.75, -76.65], [68.5, -76.75], [68.25, -76.65], [68.0, -76.75], [67.75, -76.65], [67.5, -76.75], [66.97, -76.53], [66.82, -76.18], [66.75, -76.15], [66.5, -76.25], [66.25, -76.15], [66.0, -76.25], [65.47, -76.03], [65.32, -75.68], [65.25, -75.65], [65.0, -75.75], [64.47, -75.53], [64.32, -75.18], [63.97, -75.03], [63.75, -74.5], [63.85, -74.25], [63.75, -74.0], [63.97, -73.47]]]]}, "2015-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[63.97, -73.47], [64.5, -73.25], [64.75, -73.35], [64.82, -73.32], [64.97, -72.97], [65.5, -72.75], [65.75, -72.85], [66.0, -72.75], [66.53, -72.97], [66.68, -73.32], [66.75, -73.35], [67.0, -73.25], [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], [68.82, -73.32], [68.97, -72.97], [69.38, -72.8], [69.25, -72.5], [69.47, -71.97], [69.82, -71.82], [69.97, -71.47], [70.32, -71.32], [70.47, -70.97], [71.0, -70.75], [71.25, -70.85], [71.5, -70.75], [71.75, -70.85], [72.0, -70.75], [72.53, -70.97], [72.75, -71.5], [72.65, -71.75], [72.68, -71.82], [72.75, -71.85], [73.0, -71.75], [73.53, -71.97], [73.68, -72.32], [73.75, -72.35], [74.0, -72.25], [74.53, -72.47], [74.75, -73.0], [74.65, -73.25], [74.68, -73.32], [74.75, -73.35], [75.0, -73.25], [75.53, -73.47], [75.68, -73.82], [75.75, -73.85], [76.0, -73.75], [76.53, -73.97], [76.68, -74.32], [77.03, -74.47], [77.18, -74.82], [77.25, -74.85], [77.5, -74.75], [77.75, -74.85], [78.0, -74.75], [78.25, -74.85], [78.5, -74.75], [78.75, -74.85], [79.0, -74.75], [79.53, -74.97], [79.75, -75.5], [79.65, -75.75], [79.75, -76.0], [79.53, -76.53], [79.18, -76.68], [79.03, -77.03], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.75, -77.15], [75.5, -77.25], [75.25, -77.15], [75.0, -77.25], [74.75, -77.15], [74.5, -77.25], [74.25, -77.15], [74.0, -77.25], [73.75, -77.15], [73.5, -77.25], [73.25, -77.15], [73.0, -77.25], [72.75, -77.15], [72.5, -77.25], [71.97, -77.03], [71.82, -76.68], [71.75, -76.65], [71.5, -76.75], [71.25, -76.65], [71.0, -76.75], [70.75, -76.65], [70.5, -76.75], [70.25, -76.65], [70.0, -76.75], [69.75, -76.65], [69.5, -76.75], [69.25, -76.65], [69.0, -76.75], [68.75, -76.65], [68.5, -76.75], [68.25, -76.65], [68.0, -76.75], [67.75, -76.65], [67.5, -76.75], [66.97, -76.53], [66.82, -76.18], [66.75, -76.15], [66.5, -76.25], [66.25, -76.15], [66.0, -76.25], [65.47, -76.03], [65.32, -75.68], [65.25, -75.65], [65.0, -75.75], [64.47, -75.53], [64.32, -75.18], [63.97, -75.03], [63.75, -74.5], [63.85, -74.25], [63.75, -74.0], [63.97, -73.47]]]]}, "2015-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.97, -73.47], [68.5, -73.25], [68.75, -73.35], [69.0, -73.25], [69.25, -73.35], [69.5, -73.25], [69.75, -73.35], [70.0, -73.25], [70.25, -73.35], [70.5, -73.25], [70.75, -73.35], [71.0, -73.25], [71.25, -73.35], [71.5, -73.25], [71.75, -73.35], [72.0, -73.25], [72.25, -73.35], [72.5, -73.25], [72.75, -73.35], [73.0, -73.25], [73.25, -73.35], [73.5, -73.25], [73.75, -73.35], [74.0, -73.25], [74.25, -73.35], [74.5, -73.25], [74.75, -73.35], [75.0, -73.25], [75.53, -73.47], [75.68, -73.82], [75.75, -73.85], [76.0, -73.75], [76.53, -73.97], [76.68, -74.32], [77.03, -74.47], [77.18, -74.82], [77.25, -74.85], [77.5, -74.75], [77.75, -74.85], [78.0, -74.75], [78.25, -74.85], [78.5, -74.75], [78.75, -74.85], [79.0, -74.75], [79.53, -74.97], [79.75, -75.5], [79.65, -75.75], [79.75, -76.0], [79.53, -76.53], [79.18, -76.68], [79.03, -77.03], [78.5, -77.25], [78.25, -77.15], [78.0, -77.25], [77.75, -77.15], [77.5, -77.25], [77.25, -77.15], [77.0, -77.25], [76.75, -77.15], [76.5, -77.25], [76.25, -77.15], [76.0, -77.25], [75.75, -77.15], [75.5, -77.25], [75.25, -77.15], [75.0, -77.25], [74.75, -77.15], [74.5, -77.25], [74.25, -77.15], [74.0, -77.25], [73.75, -77.15], [73.5, -77.25], [73.25, -77.15], [73.0, -77.25], [72.75, -77.15], [72.5, -77.25], [71.97, -77.03], [71.82, -76.68], [71.75, -76.65], [71.5, -76.75], [71.25, -76.65], [71.0, -76.75], [70.75, -76.65], [70.5, -76.75], [70.25, -76.65], [70.0, -76.75], [69.47, -76.53], [69.25, -76.0], [69.47, -75.47], [69.88, -75.3], [69.82, -75.18], [69.75, -75.15], [69.5, -75.25], [69.25, -75.15], [69.0, -75.25], [68.75, -75.15], [68.5, -75.25], [67.97, -75.03], [67.75, -74.5], [67.85, -74.25], [67.75, -74.0], [67.97, -73.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.0624392595777294}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.887775454070316}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.08253127660734, -19.92055799586865, -21.726706384344226, -22.91501610257029, -25.087674043499987]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-18.232627582459287, -27.426817536883846, -29.505742279174996, -30.98414712214469, -31.45847569030127]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9163820890779277, -3.5849396306517476, -3.576352421761107, -4.586693510715319, -3.6423800516752918]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.930382954232215, -5.442008555596146, -5.46405169917773, -6.0624392595777294, -4.8128509918975055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2483252455144944, -1.5641264202573524, -1.5903563686376483, -2.001377297796346, -1.4618251655703356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2507148559236874, -1.9377114799436916, -1.9342554571386377, -2.5580733634547284, -1.7727563285502983]}}