{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:52.736480", "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": "2022-Jan-11_to_2022-Jan-14_72.0_-67.0"}, "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": 2022010000475}, "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 11 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 14 2022"}, "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": 130866.61961737929}, "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", "Southern-Ocean"]}, "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": -67.0}, "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": 72.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "72.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 65.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 75.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -68.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -62.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[64.97, -66.53], [64.75, -66.0], [64.97, -65.47], [65.5, -65.25], [65.75, -65.35], [65.82, -65.32], [65.97, -64.97], [66.5, -64.75], [66.75, -64.85], [67.0, -64.75], [67.25, -64.85], [67.5, -64.75], [67.75, -64.85], [68.0, -64.75], [68.25, -64.85], [68.5, -64.75], [68.75, -64.85], [68.82, -64.82], [68.97, -64.47], [69.5, -64.25], [69.75, -64.35], [70.0, -64.25], [70.25, -64.35], [70.32, -64.32], [70.47, -63.97], [71.0, -63.75], [71.25, -63.85], [71.5, -63.75], [71.75, -63.85], [71.82, -63.82], [71.97, -63.47], [72.5, -63.25], [72.75, -63.35], [73.0, -63.25], [73.25, -63.35], [73.32, -63.32], [73.47, -62.97], [74.0, -62.75], [74.25, -62.85], [74.32, -62.82], [74.47, -62.47], [75.0, -62.25], [75.25, -62.35], [75.5, -62.25], [76.03, -62.47], [76.25, -63.0], [76.15, -63.25], [76.25, -63.5], [76.03, -64.03], [75.68, -64.18], [75.53, -64.53], [75.18, -64.68], [75.03, -65.03], [74.68, -65.18], [74.53, -65.53], [74.18, -65.68], [74.15, -65.75], [74.25, -66.0], [74.15, -66.25], [74.25, -66.5], [74.15, -66.75], [74.25, -67.0], [74.03, -67.53], [73.5, -67.75], [73.25, -67.65], [73.0, -67.75], [72.75, -67.65], [72.68, -67.68], [72.65, -67.75], [72.75, -68.0], [72.65, -68.25], [72.75, -68.5], [72.53, -69.03], [72.0, -69.25], [71.75, -69.15], [71.5, -69.25], [70.97, -69.03], [70.82, -68.68], [70.75, -68.65], [70.5, -68.75], [70.25, -68.65], [70.0, -68.75], [69.75, -68.65], [69.5, -68.75], [69.25, -68.65], [69.0, -68.75], [68.75, -68.65], [68.5, -68.75], [68.25, -68.65], [68.0, -68.75], [67.75, -68.65], [67.5, -68.75], [67.25, -68.65], [67.0, -68.75], [66.47, -68.53], [66.25, -68.0], [66.47, -67.47], [66.82, -67.32], [66.97, -66.97], [67.5, -66.75], [67.25, -66.65], [67.0, -66.75], [66.75, -66.65], [66.5, -66.75], [66.25, -66.65], [66.0, -66.75], [65.75, -66.65], [65.5, -66.75], [64.97, -66.53]], [[67.93, -66.93], [67.82, -66.68], [67.75, -66.65], [67.5, -66.75], [67.93, -66.93]], [[68.25, -67.35], [68.32, -67.32], [68.35, -67.25], [68.32, -67.18], [68.07, -67.07], [68.18, -67.32], [68.25, -67.35]]]]}, "2022-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[64.97, -66.53], [64.75, -66.0], [64.97, -65.47], [65.5, -65.25], [65.75, -65.35], [65.82, -65.32], [65.97, -64.97], [66.5, -64.75], [66.75, -64.85], [67.0, -64.75], [67.25, -64.85], [67.5, -64.75], [67.75, -64.85], [68.0, -64.75], [68.25, -64.85], [68.5, -64.75], [68.75, -64.85], [68.82, -64.82], [68.97, -64.47], [69.5, -64.25], [69.75, -64.35], [70.0, -64.25], [70.25, -64.35], [70.32, -64.32], [70.47, -63.97], [71.0, -63.75], [71.25, -63.85], [71.5, -63.75], [71.75, -63.85], [71.82, -63.82], [71.97, -63.47], [72.5, -63.25], [72.75, -63.35], [73.0, -63.25], [73.25, -63.35], [73.32, -63.32], [73.47, -62.97], [74.0, -62.75], [74.25, -62.85], [74.32, -62.82], [74.47, -62.47], [75.0, -62.25], [75.25, -62.35], [75.5, -62.25], [76.03, -62.47], [76.25, -63.0], [76.15, -63.25], [76.25, -63.5], [76.03, -64.03], [75.68, -64.18], [75.53, -64.53], [75.18, -64.68], [75.03, -65.03], [74.68, -65.18], [74.53, -65.53], [74.18, -65.68], [74.15, -65.75], [74.25, -66.0], [74.15, -66.25], [74.25, -66.5], [74.15, -66.75], [74.25, -67.0], [74.03, -67.53], [73.5, -67.75], [73.25, -67.65], [73.0, -67.75], [72.75, -67.65], [72.68, -67.68], [72.65, -67.75], [72.75, -68.0], [72.65, -68.25], [72.75, -68.5], [72.53, -69.03], [72.0, -69.25], [71.75, -69.15], [71.5, -69.25], [70.97, -69.03], [70.82, -68.68], [70.75, -68.65], [70.5, -68.75], [70.25, -68.65], [70.0, -68.75], [69.75, -68.65], [69.5, -68.75], [69.25, -68.65], [69.0, -68.75], [68.75, -68.65], [68.5, -68.75], [68.25, -68.65], [68.0, -68.75], [67.75, -68.65], [67.5, -68.75], [67.25, -68.65], [67.0, -68.75], [66.47, -68.53], [66.25, -68.0], [66.47, -67.47], [66.82, -67.32], [66.97, -66.97], [67.5, -66.75], [67.25, -66.65], [67.0, -66.75], [66.75, -66.65], [66.5, -66.75], [66.25, -66.65], [66.0, -66.75], [65.75, -66.65], [65.5, -66.75], [64.97, -66.53]], [[67.93, -66.93], [67.82, -66.68], [67.75, -66.65], [67.5, -66.75], [67.93, -66.93]], [[68.25, -67.35], [68.32, -67.32], [68.35, -67.25], [68.32, -67.18], [68.07, -67.07], [68.18, -67.32], [68.25, -67.35]]]]}, "2022-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[64.97, -66.53], [64.75, -66.0], [64.97, -65.47], [65.5, -65.25], [65.75, -65.35], [65.82, -65.32], [65.97, -64.97], [66.5, -64.75], [66.75, -64.85], [67.0, -64.75], [67.25, -64.85], [67.5, -64.75], [67.75, -64.85], [68.0, -64.75], [68.25, -64.85], [68.5, -64.75], [68.75, -64.85], [68.82, -64.82], [68.97, -64.47], [69.5, -64.25], [69.75, -64.35], [70.0, -64.25], [70.25, -64.35], [70.32, -64.32], [70.47, -63.97], [71.0, -63.75], [71.25, -63.85], [71.5, -63.75], [71.75, -63.85], [71.82, -63.82], [71.97, -63.47], [72.5, -63.25], [72.75, -63.35], [73.0, -63.25], [73.25, -63.35], [73.32, -63.32], [73.47, -62.97], [74.0, -62.75], [74.25, -62.85], [74.32, -62.82], [74.47, -62.47], [75.0, -62.25], [75.25, -62.35], [75.5, -62.25], [76.03, -62.47], [76.25, -63.0], [76.15, -63.25], [76.25, -63.5], [76.03, -64.03], [75.68, -64.18], [75.53, -64.53], [75.18, -64.68], [75.03, -65.03], [74.68, -65.18], [74.53, -65.53], [74.18, -65.68], [74.15, -65.75], [74.25, -66.0], [74.15, -66.25], [74.25, -66.5], [74.15, -66.75], [74.25, -67.0], [74.03, -67.53], [73.5, -67.75], [73.25, -67.65], [73.0, -67.75], [72.75, -67.65], [72.68, -67.68], [72.65, -67.75], [72.75, -68.0], [72.65, -68.25], [72.75, -68.5], [72.53, -69.03], [72.0, -69.25], [71.75, -69.15], [71.5, -69.25], [70.97, -69.03], [70.82, -68.68], [70.75, -68.65], [70.5, -68.75], [70.25, -68.65], [70.0, -68.75], [69.75, -68.65], [69.5, -68.75], [69.25, -68.65], [69.0, -68.75], [68.75, -68.65], [68.5, -68.75], [68.25, -68.65], [68.0, -68.75], [67.75, -68.65], [67.5, -68.75], [67.25, -68.65], [67.0, -68.75], [66.47, -68.53], [66.25, -68.0], [66.47, -67.47], [66.82, -67.32], [66.97, -66.97], [67.5, -66.75], [67.25, -66.65], [67.0, -66.75], [66.75, -66.65], [66.5, -66.75], [66.25, -66.65], [66.0, -66.75], [65.75, -66.65], [65.5, -66.75], [64.97, -66.53]], [[67.93, -66.93], [67.82, -66.68], [67.75, -66.65], [67.5, -66.75], [67.93, -66.93]], [[68.25, -67.35], [68.32, -67.32], [68.35, -67.25], [68.32, -67.18], [68.07, -67.07], [68.18, -67.32], [68.25, -67.35]]]]}, "2022-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.47, -67.53], [71.25, -67.0], [71.47, -66.47], [72.0, -66.25], [72.25, -66.35], [72.5, -66.25], [72.75, -66.35], [73.0, -66.25], [73.25, -66.35], [73.5, -66.25], [74.03, -66.47], [74.25, -67.0], [74.03, -67.53], [73.5, -67.75], [73.25, -67.65], [73.0, -67.75], [72.75, -67.65], [72.5, -67.75], [72.25, -67.65], [72.0, -67.75], [71.47, -67.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.079624794927497}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7257411897264519}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.279674557800206, -2.630545528502978, -2.555879432226675, -2.092151879957896]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.18637234036413, -8.384183373043982, -8.54213424237571, -2.224777079013961]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5275753518127184, -1.8751761494160621, -1.790604050345104, -1.3063096474687228]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8209330142771023, -4.079624794927497, -3.922603801301534, -1.3463142917918844]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.195264101764159, -2.637080003434976, -2.5819225278453835, -1.6531382723618586]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.147727323378022, -4.072700954947852, -4.108938092650288, -1.6930707334141262]}}