{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:47.099188", "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-Mar-06_to_2012-Mar-10_55.0_-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": 2012030000496}, "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": "March 06 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 10 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": 134837.85166073503}, "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": ["Southern 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": -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": 55.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "55.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 62.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -72.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.97, -68.97], [54.5, -68.75], [54.75, -68.85], [55.0, -68.75], [55.25, -68.85], [55.5, -68.75], [55.75, -68.85], [56.0, -68.75], [56.25, -68.85], [56.5, -68.75], [56.75, -68.85], [56.82, -68.82], [56.97, -68.47], [57.5, -68.25], [57.75, -68.35], [58.0, -68.25], [58.25, -68.35], [58.32, -68.32], [58.47, -67.97], [59.0, -67.75], [59.53, -67.97], [59.68, -68.32], [59.75, -68.35], [60.0, -68.25], [60.25, -68.35], [60.5, -68.25], [60.75, -68.35], [61.0, -68.25], [61.25, -68.35], [61.5, -68.25], [61.75, -68.35], [62.0, -68.25], [62.53, -68.47], [62.75, -69.0], [62.53, -69.53], [62.0, -69.75], [61.75, -69.65], [61.5, -69.75], [61.25, -69.65], [61.0, -69.75], [60.75, -69.65], [60.5, -69.75], [60.25, -69.65], [60.18, -69.68], [60.03, -70.03], [59.5, -70.25], [59.25, -70.15], [59.0, -70.25], [58.75, -70.15], [58.5, -70.25], [58.25, -70.15], [58.0, -70.25], [57.75, -70.15], [57.68, -70.18], [57.53, -70.53], [57.0, -70.75], [56.75, -70.65], [56.5, -70.75], [56.25, -70.65], [56.0, -70.75], [55.75, -70.65], [55.5, -70.75], [55.25, -70.65], [55.0, -70.75], [54.75, -70.65], [54.5, -70.75], [53.97, -70.53], [53.75, -70.0], [53.85, -69.75], [53.75, -69.5], [53.97, -68.97]]]]}, "2012-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -71.47], [45.5, -71.25], [45.75, -71.35], [46.0, -71.25], [46.25, -71.35], [46.32, -71.32], [46.47, -70.97], [47.0, -70.75], [47.25, -70.85], [47.5, -70.75], [47.75, -70.85], [48.0, -70.75], [48.25, -70.85], [48.5, -70.75], [48.75, -70.85], [48.82, -70.82], [48.97, -70.47], [49.5, -70.25], [49.75, -70.35], [49.82, -70.32], [49.97, -69.97], [50.5, -69.75], [50.75, -69.85], [50.82, -69.82], [50.97, -69.47], [51.5, -69.25], [51.75, -69.35], [52.0, -69.25], [52.25, -69.35], [52.32, -69.32], [52.47, -68.97], [53.0, -68.75], [53.25, -68.85], [53.5, -68.75], [53.75, -68.85], [53.82, -68.82], [53.97, -68.47], [54.32, -68.32], [54.47, -67.97], [54.82, -67.82], [54.97, -67.47], [55.5, -67.25], [55.75, -67.35], [56.0, -67.25], [56.25, -67.35], [56.5, -67.25], [56.75, -67.35], [57.0, -67.25], [57.25, -67.35], [57.32, -67.32], [57.47, -66.97], [58.0, -66.75], [58.25, -66.85], [58.5, -66.75], [59.0, -66.96], [59.5, -66.75], [59.75, -66.85], [60.0, -66.75], [60.53, -66.97], [60.68, -67.32], [60.75, -67.35], [61.0, -67.25], [61.25, -67.35], [61.5, -67.25], [61.75, -67.35], [62.0, -67.25], [62.25, -67.35], [62.5, -67.25], [63.03, -67.47], [63.25, -68.0], [63.15, -68.25], [63.25, -68.5], [63.15, -68.75], [63.25, -69.0], [63.03, -69.53], [62.5, -69.75], [62.25, -69.65], [62.0, -69.75], [61.75, -69.65], [61.5, -69.75], [61.25, -69.65], [61.0, -69.75], [60.75, -69.65], [60.5, -69.75], [60.25, -69.65], [60.18, -69.68], [60.03, -70.03], [59.5, -70.25], [59.25, -70.15], [59.0, -70.25], [58.75, -70.15], [58.5, -70.25], [58.25, -70.15], [58.18, -70.18], [58.03, -70.53], [57.5, -70.75], [57.25, -70.65], [57.0, -70.75], [56.75, -70.65], [56.5, -70.75], [56.25, -70.65], [56.18, -70.68], [56.03, -71.03], [55.5, -71.25], [55.25, -71.15], [55.0, -71.25], [54.75, -71.15], [54.5, -71.25], [54.25, -71.15], [54.0, -71.25], [53.75, -71.15], [53.5, -71.25], [53.25, -71.15], [53.18, -71.18], [53.03, -71.53], [52.5, -71.75], [52.25, -71.65], [52.18, -71.68], [52.03, -72.03], [51.5, -72.25], [51.25, -72.15], [51.0, -72.25], [50.75, -72.15], [50.68, -72.18], [50.53, -72.53], [50.0, -72.75], [49.75, -72.65], [49.5, -72.75], [49.25, -72.65], [49.0, -72.75], [48.75, -72.65], [48.68, -72.68], [48.53, -73.03], [48.0, -73.25], [47.75, -73.15], [47.5, -73.25], [47.25, -73.15], [47.0, -73.25], [46.75, -73.15], [46.5, -73.25], [46.25, -73.15], [46.0, -73.25], [45.75, -73.15], [45.5, -73.25], [44.97, -73.03], [44.75, -72.5], [44.85, -72.25], [44.75, -72.0], [44.97, -71.47]]]]}, "2012-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -71.47], [45.5, -71.25], [45.75, -71.35], [46.0, -71.25], [46.25, -71.35], [46.32, -71.32], [46.47, -70.97], [47.0, -70.75], [47.25, -70.85], [47.5, -70.75], [47.75, -70.85], [48.0, -70.75], [48.25, -70.85], [48.5, -70.75], [48.75, -70.85], [48.82, -70.82], [48.97, -70.47], [49.5, -70.25], [49.75, -70.35], [49.82, -70.32], [49.97, -69.97], [50.5, -69.75], [50.75, -69.85], [50.82, -69.82], [50.97, -69.47], [51.5, -69.25], [51.75, -69.35], [52.0, -69.25], [52.25, -69.35], [52.32, -69.32], [52.47, -68.97], [53.0, -68.75], [53.25, -68.85], [53.5, -68.75], [53.75, -68.85], [53.82, -68.82], [53.97, -68.47], [54.32, -68.32], [54.47, -67.97], [54.82, -67.82], [54.97, -67.47], [55.5, -67.25], [55.75, -67.35], [56.0, -67.25], [56.25, -67.35], [56.5, -67.25], [56.75, -67.35], [57.0, -67.25], [57.25, -67.35], [57.32, -67.32], [57.47, -66.97], [58.0, -66.75], [58.25, -66.85], [58.5, -66.75], [59.0, -66.96], [59.5, -66.75], [59.75, -66.85], [60.0, -66.75], [60.5, -66.96], [61.0, -66.75], [61.25, -66.85], [61.5, -66.75], [61.75, -66.85], [62.0, -66.75], [62.53, -66.97], [62.68, -67.32], [63.03, -67.47], [63.25, -68.0], [63.15, -68.25], [63.25, -68.5], [63.15, -68.75], [63.25, -69.0], [63.03, -69.53], [62.5, -69.75], [62.25, -69.65], [62.0, -69.75], [61.75, -69.65], [61.5, -69.75], [61.25, -69.65], [61.0, -69.75], [60.75, -69.65], [60.5, -69.75], [60.25, -69.65], [60.18, -69.68], [60.03, -70.03], [59.5, -70.25], [59.25, -70.15], [59.0, -70.25], [58.75, -70.15], [58.5, -70.25], [58.25, -70.15], [58.18, -70.18], [58.03, -70.53], [57.5, -70.75], [57.25, -70.65], [57.0, -70.75], [56.75, -70.65], [56.5, -70.75], [56.25, -70.65], [56.18, -70.68], [56.03, -71.03], [55.5, -71.25], [55.25, -71.15], [55.0, -71.25], [54.75, -71.15], [54.5, -71.25], [54.25, -71.15], [54.0, -71.25], [53.75, -71.15], [53.5, -71.25], [53.25, -71.15], [53.18, -71.18], [53.03, -71.53], [52.5, -71.75], [52.25, -71.65], [52.18, -71.68], [52.03, -72.03], [51.5, -72.25], [51.25, -72.15], [51.0, -72.25], [50.75, -72.15], [50.68, -72.18], [50.53, -72.53], [50.0, -72.75], [49.75, -72.65], [49.5, -72.75], [49.25, -72.65], [49.0, -72.75], [48.75, -72.65], [48.68, -72.68], [48.53, -73.03], [48.0, -73.25], [47.75, -73.15], [47.5, -73.25], [47.25, -73.15], [47.0, -73.25], [46.75, -73.15], [46.5, -73.25], [46.25, -73.15], [46.0, -73.25], [45.75, -73.15], [45.5, -73.25], [44.97, -73.03], [44.75, -72.5], [44.85, -72.25], [44.75, -72.0], [44.97, -71.47]]]]}, "2012-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -71.47], [45.5, -71.25], [45.75, -71.35], [46.0, -71.25], [46.25, -71.35], [46.32, -71.32], [46.47, -70.97], [47.0, -70.75], [47.25, -70.85], [47.5, -70.75], [47.75, -70.85], [48.0, -70.75], [48.25, -70.85], [48.5, -70.75], [48.75, -70.85], [48.82, -70.82], [48.97, -70.47], [49.5, -70.25], [49.75, -70.35], [49.82, -70.32], [49.97, -69.97], [50.5, -69.75], [50.75, -69.85], [50.82, -69.82], [50.97, -69.47], [51.5, -69.25], [51.75, -69.35], [52.0, -69.25], [52.25, -69.35], [52.32, -69.32], [52.47, -68.97], [53.0, -68.75], [53.25, -68.85], [53.5, -68.75], [53.75, -68.85], [53.82, -68.82], [53.97, -68.47], [54.32, -68.32], [54.47, -67.97], [54.82, -67.82], [54.97, -67.47], [55.5, -67.25], [55.75, -67.35], [56.0, -67.25], [56.25, -67.35], [56.5, -67.25], [56.75, -67.35], [57.0, -67.25], [57.25, -67.35], [57.32, -67.32], [57.47, -66.97], [58.0, -66.75], [58.25, -66.85], [58.5, -66.75], [59.0, -66.96], [59.5, -66.75], [59.75, -66.85], [60.0, -66.75], [60.5, -66.96], [61.0, -66.75], [61.25, -66.85], [61.5, -66.75], [61.75, -66.85], [62.0, -66.75], [62.53, -66.97], [62.68, -67.32], [63.03, -67.47], [63.25, -68.0], [63.15, -68.25], [63.25, -68.5], [63.15, -68.75], [63.25, -69.0], [63.03, -69.53], [62.5, -69.75], [62.25, -69.65], [62.0, -69.75], [61.75, -69.65], [61.5, -69.75], [61.25, -69.65], [61.0, -69.75], [60.75, -69.65], [60.5, -69.75], [60.25, -69.65], [60.18, -69.68], [60.03, -70.03], [59.5, -70.25], [59.25, -70.15], [59.0, -70.25], [58.75, -70.15], [58.5, -70.25], [58.25, -70.15], [58.18, -70.18], [58.03, -70.53], [57.5, -70.75], [57.25, -70.65], [57.0, -70.75], [56.75, -70.65], [56.5, -70.75], [56.25, -70.65], [56.18, -70.68], [56.03, -71.03], [55.5, -71.25], [55.25, -71.15], [55.0, -71.25], [54.75, -71.15], [54.5, -71.25], [54.25, -71.15], [54.0, -71.25], [53.75, -71.15], [53.5, -71.25], [53.25, -71.15], [53.18, -71.18], [53.03, -71.53], [52.5, -71.75], [52.25, -71.65], [52.18, -71.68], [52.03, -72.03], [51.5, -72.25], [51.25, -72.15], [51.0, -72.25], [50.75, -72.15], [50.68, -72.18], [50.53, -72.53], [50.0, -72.75], [49.75, -72.65], [49.5, -72.75], [49.25, -72.65], [49.0, -72.75], [48.75, -72.65], [48.68, -72.68], [48.53, -73.03], [48.0, -73.25], [47.75, -73.15], [47.5, -73.25], [47.25, -73.15], [47.0, -73.25], [46.75, -73.15], [46.5, -73.25], [46.25, -73.15], [46.0, -73.25], [45.75, -73.15], [45.5, -73.25], [44.97, -73.03], [44.75, -72.5], [44.85, -72.25], [44.75, -72.0], [44.97, -71.47]]]]}, "2012-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[60.47, -68.03], [60.25, -67.5], [60.47, -66.97], [61.0, -66.75], [61.25, -66.85], [61.5, -66.75], [61.75, -66.85], [62.0, -66.75], [62.53, -66.97], [62.75, -67.5], [62.53, -68.03], [62.0, -68.25], [61.75, -68.15], [61.5, -68.25], [61.25, -68.15], [61.0, -68.25], [60.47, -68.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.821689618893203}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.769090199413669}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-36.76996314378988, -37.32782928141194, -37.24403413396078, -36.9143959554529, -15.135234444683135]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-40.959624379763824, -45.82820159470637, -46.21838870683379, -47.265848345789436, -15.937561561598784]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.935808464299093, -5.964684517318743, -6.0999138362486525, -5.4795864346466, -3.791584732856298]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.577638780714295, -8.204328636105203, -8.821689618893203, -6.766247661321387, -4.041512546706258]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3114694972264795, -1.4780285741366428, -1.4694825992888911, -1.3005673334988943, -1.1815349340556534]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4292258506665718, -1.806330374601516, -2.015282469715969, -1.6934982425377334, -1.2362739887618857]}}