{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:30.310588", "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": "2021-Jul-25_to_2021-Jul-28_62.0_-69.5"}, "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": 2021070000911}, "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 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 28 2021"}, "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": 58981.62992639454}, "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": -69.5}, "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": 62.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "62.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 56.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 66.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -70.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -67.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.97, -69.03], [55.75, -68.5], [55.97, -67.97], [56.5, -67.75], [56.75, -67.85], [57.0, -67.75], [57.25, -67.85], [57.5, -67.75], [57.75, -67.85], [57.82, -67.82], [57.97, -67.47], [58.5, -67.25], [58.75, -67.35], [59.0, -67.25], [59.25, -67.35], [59.5, -67.25], [59.75, -67.35], [60.0, -67.25], [60.25, -67.35], [60.5, -67.25], [61.03, -67.47], [61.25, -68.0], [61.04, -68.5], [61.18, -68.82], [61.25, -68.85], [61.5, -68.75], [61.75, -68.85], [62.0, -68.75], [62.25, -68.85], [62.5, -68.75], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [63.75, -68.85], [64.0, -68.75], [64.25, -68.85], [64.32, -68.82], [64.47, -68.47], [65.0, -68.25], [65.25, -68.35], [65.5, -68.25], [65.75, -68.35], [66.0, -68.25], [66.25, -68.35], [66.5, -68.25], [67.03, -68.47], [67.25, -69.0], [67.15, -69.25], [67.25, -69.5], [67.03, -70.03], [66.68, -70.18], [66.53, -70.53], [66.0, -70.75], [65.75, -70.65], [65.5, -70.75], [65.25, -70.65], [65.0, -70.75], [64.75, -70.65], [64.68, -70.68], [64.53, -71.03], [64.0, -71.25], [63.75, -71.15], [63.5, -71.25], [63.25, -71.15], [63.0, -71.25], [62.47, -71.03], [62.32, -70.68], [62.25, -70.65], [62.0, -70.75], [61.75, -70.65], [61.5, -70.75], [61.25, -70.65], [61.0, -70.75], [60.47, -70.53], [60.32, -70.18], [60.0, -70.04], [59.5, -70.25], [58.97, -70.03], [58.82, -69.68], [58.75, -69.65], [58.5, -69.75], [58.25, -69.65], [58.0, -69.75], [57.75, -69.65], [57.5, -69.75], [56.97, -69.53], [56.82, -69.18], [56.75, -69.15], [56.5, -69.25], [55.97, -69.03]]]]}, "2021-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.97, -69.03], [55.75, -68.5], [55.97, -67.97], [56.5, -67.75], [56.75, -67.85], [57.0, -67.75], [57.25, -67.85], [57.5, -67.75], [57.75, -67.85], [57.82, -67.82], [57.97, -67.47], [58.5, -67.25], [58.75, -67.35], [59.0, -67.25], [59.25, -67.35], [59.5, -67.25], [59.75, -67.35], [60.0, -67.25], [60.25, -67.35], [60.5, -67.25], [61.03, -67.47], [61.25, -68.0], [61.04, -68.5], [61.18, -68.82], [61.25, -68.85], [61.5, -68.75], [61.75, -68.85], [62.0, -68.75], [62.25, -68.85], [62.5, -68.75], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [63.75, -68.85], [64.0, -68.75], [64.25, -68.85], [64.32, -68.82], [64.47, -68.47], [65.0, -68.25], [65.25, -68.35], [65.5, -68.25], [65.75, -68.35], [66.0, -68.25], [66.25, -68.35], [66.5, -68.25], [67.03, -68.47], [67.25, -69.0], [67.15, -69.25], [67.25, -69.5], [67.03, -70.03], [66.68, -70.18], [66.53, -70.53], [66.0, -70.75], [65.75, -70.65], [65.5, -70.75], [65.25, -70.65], [65.0, -70.75], [64.75, -70.65], [64.68, -70.68], [64.53, -71.03], [64.0, -71.25], [63.75, -71.15], [63.5, -71.25], [63.25, -71.15], [63.0, -71.25], [62.75, -71.15], [62.5, -71.25], [62.25, -71.15], [62.0, -71.25], [61.47, -71.03], [61.32, -70.68], [61.25, -70.65], [61.0, -70.75], [60.47, -70.53], [60.32, -70.18], [60.0, -70.04], [59.5, -70.25], [58.97, -70.03], [58.82, -69.68], [58.75, -69.65], [58.5, -69.75], [58.25, -69.65], [58.0, -69.75], [57.75, -69.65], [57.5, -69.75], [56.97, -69.53], [56.82, -69.18], [56.75, -69.15], [56.5, -69.25], [55.97, -69.03]]]]}, "2021-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[55.97, -69.03], [55.75, -68.5], [55.97, -67.97], [56.5, -67.75], [56.75, -67.85], [57.0, -67.75], [57.25, -67.85], [57.5, -67.75], [57.75, -67.85], [57.82, -67.82], [57.97, -67.47], [58.5, -67.25], [58.75, -67.35], [59.0, -67.25], [59.25, -67.35], [59.5, -67.25], [59.75, -67.35], [60.0, -67.25], [60.25, -67.35], [60.5, -67.25], [61.03, -67.47], [61.25, -68.0], [61.04, -68.5], [61.18, -68.82], [61.25, -68.85], [61.5, -68.75], [61.75, -68.85], [62.0, -68.75], [62.25, -68.85], [62.5, -68.75], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [63.75, -68.85], [64.0, -68.75], [64.25, -68.85], [64.32, -68.82], [64.47, -68.47], [65.0, -68.25], [65.25, -68.35], [65.5, -68.25], [65.75, -68.35], [66.0, -68.25], [66.25, -68.35], [66.5, -68.25], [67.03, -68.47], [67.25, -69.0], [67.15, -69.25], [67.25, -69.5], [67.03, -70.03], [66.68, -70.18], [66.53, -70.53], [66.0, -70.75], [65.75, -70.65], [65.5, -70.75], [65.25, -70.65], [65.0, -70.75], [64.75, -70.65], [64.68, -70.68], [64.53, -71.03], [64.0, -71.25], [63.75, -71.15], [63.5, -71.25], [63.25, -71.15], [63.0, -71.25], [62.75, -71.15], [62.5, -71.25], [62.25, -71.15], [62.0, -71.25], [61.47, -71.03], [61.32, -70.68], [61.25, -70.65], [61.0, -70.75], [60.47, -70.53], [60.32, -70.18], [60.0, -70.04], [59.5, -70.25], [58.97, -70.03], [58.82, -69.68], [58.75, -69.65], [58.5, -69.75], [58.25, -69.65], [58.0, -69.75], [57.75, -69.65], [57.5, -69.75], [56.97, -69.53], [56.82, -69.18], [56.75, -69.15], [56.5, -69.25], [55.97, -69.03]]]]}, "2021-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[60.47, -70.53], [60.25, -70.0], [60.47, -69.47], [61.0, -69.25], [61.25, -69.35], [61.32, -69.32], [61.47, -68.97], [62.0, -68.75], [62.53, -68.97], [62.68, -69.32], [62.75, -69.35], [63.0, -69.25], [63.53, -69.47], [63.75, -70.0], [63.53, -70.53], [63.18, -70.68], [63.03, -71.03], [62.5, -71.25], [62.25, -71.15], [62.0, -71.25], [61.47, -71.03], [61.32, -70.68], [61.25, -70.65], [61.0, -70.75], [60.47, -70.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.450243400445288}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.218237689143437}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-41.26777511072382, -41.879881105285136, -42.337032518260855, -46.961313771925745]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-48.52556429357378, -48.74723621313862, -49.86281190490649, -49.06101468011602]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.875569328956771, -7.202306802389582, -7.633562534728681, -6.749672808244885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.777515095085306, -8.124086898290102, -8.450243400445288, -7.110789626210163]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2947355986670852, -1.356597059743048, -1.4193005135333563, -1.2058187489175198]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.437361562384323, -1.5642915675829068, -1.5672288361271298, -1.2415374730909263]}}