{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:25.280334", "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-01_to_2017-Jul-04_60.0_-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": 2017070000024}, "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 01 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 2017"}, "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": 75645.02214006349}, "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": 60.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "60.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 52.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 63.75}, "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": -67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, -69.03], [51.75, -68.5], [51.97, -67.97], [52.5, -67.75], [52.75, -67.85], [53.0, -67.75], [53.25, -67.85], [53.32, -67.82], [53.47, -67.47], [54.0, -67.25], [54.25, -67.35], [54.32, -67.32], [54.47, -66.97], [55.0, -66.75], [55.53, -66.97], [55.75, -67.5], [55.53, -68.03], [55.18, -68.18], [55.03, -68.53], [54.68, -68.68], [54.65, -68.75], [54.68, -68.82], [54.75, -68.85], [55.0, -68.75], [55.25, -68.85], [55.32, -68.82], [55.47, -68.47], [56.0, -68.25], [56.25, -68.35], [56.5, -68.25], [56.75, -68.35], [57.0, -68.25], [57.25, -68.35], [57.5, -68.25], [57.75, -68.35], [58.0, -68.25], [58.25, -68.35], [58.5, -68.25], [59.03, -68.47], [59.18, -68.82], [59.25, -68.85], [59.5, -68.75], [59.75, -68.85], [60.0, -68.75], [60.53, -68.97], [60.68, -69.32], [60.75, -69.35], [61.0, -69.25], [61.53, -69.47], [61.75, -70.0], [61.65, -70.25], [61.75, -70.5], [61.53, -71.03], [61.0, -71.25], [60.75, -71.15], [60.5, -71.25], [60.25, -71.15], [60.0, -71.25], [59.75, -71.15], [59.5, -71.25], [59.25, -71.15], [59.0, -71.25], [58.75, -71.15], [58.5, -71.25], [58.25, -71.15], [58.0, -71.25], [57.75, -71.15], [57.5, -71.25], [57.25, -71.15], [57.0, -71.25], [56.47, -71.03], [56.32, -70.68], [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], [54.25, -70.65], [54.0, -70.75], [53.75, -70.65], [53.5, -70.75], [53.25, -70.65], [53.0, -70.75], [52.47, -70.53], [52.25, -70.0], [52.47, -69.47], [52.82, -69.32], [52.85, -69.25], [52.82, -69.18], [52.75, -69.15], [52.5, -69.25], [51.97, -69.03]]]]}, "2017-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, -69.03], [51.75, -68.5], [51.97, -67.97], [52.5, -67.75], [52.75, -67.85], [53.0, -67.75], [53.25, -67.85], [53.32, -67.82], [53.47, -67.47], [54.0, -67.25], [54.25, -67.35], [54.32, -67.32], [54.47, -66.97], [55.0, -66.75], [55.53, -66.97], [55.75, -67.5], [55.53, -68.03], [55.18, -68.18], [55.03, -68.53], [54.68, -68.68], [54.65, -68.75], [54.68, -68.82], [54.75, -68.85], [55.0, -68.75], [55.25, -68.85], [55.32, -68.82], [55.47, -68.47], [56.0, -68.25], [56.25, -68.35], [56.5, -68.25], [56.75, -68.35], [57.0, -68.25], [57.25, -68.35], [57.5, -68.25], [57.75, -68.35], [58.0, -68.25], [58.25, -68.35], [58.5, -68.25], [59.0, -68.46], [59.5, -68.25], [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], [62.68, -68.82], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [64.03, -68.97], [64.25, -69.5], [64.03, -70.03], [63.5, -70.25], [63.25, -70.15], [63.0, -70.25], [62.75, -70.15], [62.68, -70.18], [62.53, -70.53], [62.0, -70.75], [61.75, -70.65], [61.68, -70.68], [61.53, -71.03], [61.0, -71.25], [60.75, -71.15], [60.5, -71.25], [60.25, -71.15], [60.0, -71.25], [59.75, -71.15], [59.5, -71.25], [59.25, -71.15], [59.0, -71.25], [58.75, -71.15], [58.5, -71.25], [58.25, -71.15], [58.0, -71.25], [57.75, -71.15], [57.5, -71.25], [57.25, -71.15], [57.0, -71.25], [56.47, -71.03], [56.32, -70.68], [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], [54.25, -70.65], [54.0, -70.75], [53.75, -70.65], [53.5, -70.75], [53.25, -70.65], [53.0, -70.75], [52.47, -70.53], [52.25, -70.0], [52.47, -69.47], [52.82, -69.32], [52.85, -69.25], [52.82, -69.18], [52.75, -69.15], [52.5, -69.25], [51.97, -69.03]]]]}, "2017-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[51.97, -69.03], [51.75, -68.5], [51.97, -67.97], [52.5, -67.75], [52.75, -67.85], [53.0, -67.75], [53.25, -67.85], [53.32, -67.82], [53.47, -67.47], [54.0, -67.25], [54.25, -67.35], [54.32, -67.32], [54.47, -66.97], [55.0, -66.75], [55.53, -66.97], [55.75, -67.5], [55.53, -68.03], [55.18, -68.18], [55.03, -68.53], [54.68, -68.68], [54.65, -68.75], [54.68, -68.82], [54.75, -68.85], [55.0, -68.75], [55.25, -68.85], [55.32, -68.82], [55.47, -68.47], [56.0, -68.25], [56.25, -68.35], [56.5, -68.25], [56.75, -68.35], [57.0, -68.25], [57.25, -68.35], [57.5, -68.25], [57.75, -68.35], [58.0, -68.25], [58.25, -68.35], [58.5, -68.25], [59.0, -68.46], [59.5, -68.25], [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], [62.68, -68.82], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [64.03, -68.97], [64.25, -69.5], [64.03, -70.03], [63.5, -70.25], [63.25, -70.15], [63.0, -70.25], [62.75, -70.15], [62.68, -70.18], [62.53, -70.53], [62.0, -70.75], [61.75, -70.65], [61.68, -70.68], [61.53, -71.03], [61.0, -71.25], [60.75, -71.15], [60.5, -71.25], [60.25, -71.15], [60.0, -71.25], [59.75, -71.15], [59.5, -71.25], [59.25, -71.15], [59.0, -71.25], [58.75, -71.15], [58.5, -71.25], [58.25, -71.15], [58.0, -71.25], [57.75, -71.15], [57.5, -71.25], [57.25, -71.15], [57.0, -71.25], [56.47, -71.03], [56.32, -70.68], [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], [54.25, -70.65], [54.0, -70.75], [53.75, -70.65], [53.5, -70.75], [53.25, -70.65], [53.0, -70.75], [52.47, -70.53], [52.25, -70.0], [52.47, -69.47], [52.82, -69.32], [52.85, -69.25], [52.82, -69.18], [52.75, -69.15], [52.5, -69.25], [51.97, -69.03]]]]}, "2017-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[58.75, -69.0], [58.97, -68.47], [59.5, -68.25], [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], [62.68, -68.82], [62.75, -68.85], [63.0, -68.75], [63.25, -68.85], [63.5, -68.75], [64.03, -68.97], [64.25, -69.5], [64.03, -70.03], [63.5, -70.25], [63.25, -70.15], [63.0, -70.25], [62.75, -70.15], [62.68, -70.18], [62.53, -70.53], [62.0, -70.75], [61.75, -70.65], [61.68, -70.68], [61.53, -71.03], [61.0, -71.25], [60.75, -71.15], [60.5, -71.25], [59.97, -71.03], [59.75, -70.5], [59.85, -70.25], [59.82, -70.18], [59.47, -70.03], [59.32, -69.68], [58.97, -69.53], [58.75, -69.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.0366539553973}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.448418768890084}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-48.78307039804881, -48.79147978992361, -50.42776118751809, -45.7919463669609]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-53.335679241283174, -53.99836710947042, -57.91915117640926, -50.99124953727912]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.624941868859779, -9.261639297688172, -10.77166409832824, -7.735349740146607]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.932130012403377, -11.167649343531963, -16.0366539553973, -8.171102416892069]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4588785532212758, -1.6109567051531324, -1.8268525228296468, -1.3462209755497345]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6426056767588946, -1.8973093407313713, -2.319177857315989, -1.421961671226717]}}