{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:37.945410", "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": "2018-May-01_to_2018-May-06_22.5_-70.5"}, "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": 2018050000018}, "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": "May 01 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 06 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 61470.358502885734}, "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": -70.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -71.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -68.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.75, -70.5], [21.97, -69.97], [22.5, -69.75], [22.75, -69.85], [23.0, -69.75], [23.53, -69.97], [23.75, -70.5], [23.53, -71.03], [23.0, -71.25], [22.75, -71.15], [22.5, -71.25], [21.97, -71.03], [21.75, -70.5]]], [[[15.47, -68.97], [16.0, -68.75], [16.25, -68.85], [16.5, -68.75], [16.75, -68.85], [17.0, -68.75], [17.53, -68.97], [17.75, -69.5], [17.65, -69.75], [17.75, -70.0], [17.53, -70.53], [17.0, -70.75], [16.75, -70.65], [16.5, -70.75], [15.97, -70.53], [15.82, -70.18], [15.47, -70.03], [15.25, -69.5], [15.47, -68.97]]]]}, "2018-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, -69.25], [21.75, -69.35], [22.0, -69.25], [22.25, -69.35], [22.5, -69.25], [22.75, -69.35], [23.0, -69.25], [23.53, -69.47], [23.75, -70.0], [23.65, -70.25], [23.75, -70.5], [23.53, -71.03], [23.0, -71.25], [22.75, -71.15], [22.5, -71.25], [22.25, -71.15], [22.0, -71.25], [21.75, -71.15], [21.5, -71.25], [20.97, -71.03], [20.75, -70.5], [20.85, -70.25], [20.75, -70.0], [20.97, -69.47], [21.5, -69.25]]], [[[13.47, -69.47], [14.0, -69.25], [14.25, -69.35], [14.5, -69.25], [15.03, -69.47], [15.25, -70.0], [15.03, -70.53], [14.5, -70.75], [14.25, -70.65], [14.0, -70.75], [13.47, -70.53], [13.25, -70.0], [13.47, -69.47]]], [[[15.47, -67.97], [16.0, -67.75], [16.25, -67.85], [16.5, -67.75], [16.75, -67.85], [17.0, -67.75], [17.25, -67.85], [17.5, -67.75], [18.03, -67.97], [18.25, -68.5], [18.15, -68.75], [18.18, -68.82], [18.53, -68.97], [18.68, -69.32], [19.03, -69.47], [19.25, -70.0], [19.03, -70.53], [18.5, -70.75], [18.25, -70.65], [18.0, -70.75], [17.75, -70.65], [17.5, -70.75], [17.25, -70.65], [17.0, -70.75], [16.75, -70.65], [16.5, -70.75], [15.97, -70.53], [15.82, -70.18], [15.47, -70.03], [15.25, -69.5], [15.35, -69.25], [15.25, -69.0], [15.35, -68.75], [15.25, -68.5], [15.47, -67.97]]]]}, "2018-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, -70.53], [13.25, -70.0], [13.47, -69.47], [14.0, -69.25], [14.25, -69.35], [14.5, -69.25], [14.75, -69.35], [14.87, -69.3], [14.75, -69.0], [14.97, -68.47], [15.32, -68.32], [15.47, -67.97], [16.0, -67.75], [16.25, -67.85], [16.5, -67.75], [16.75, -67.85], [17.0, -67.75], [17.25, -67.85], [17.5, -67.75], [17.75, -67.85], [18.0, -67.75], [18.25, -67.85], [18.5, -67.75], [18.75, -67.85], [19.0, -67.75], [19.25, -67.85], [19.5, -67.75], [19.75, -67.85], [20.0, -67.75], [20.25, -67.85], [20.5, -67.75], [20.75, -67.85], [21.0, -67.75], [21.25, -67.85], [21.5, -67.75], [22.03, -67.97], [22.25, -68.5], [22.03, -69.03], [21.5, -69.25], [21.75, -69.35], [22.0, -69.25], [22.25, -69.35], [22.5, -69.25], [22.75, -69.35], [23.0, -69.25], [23.53, -69.47], [23.75, -70.0], [23.65, -70.25], [23.75, -70.5], [23.53, -71.03], [23.18, -71.18], [23.03, -71.53], [22.5, -71.75], [22.25, -71.65], [22.0, -71.75], [21.75, -71.65], [21.5, -71.75], [20.97, -71.53], [20.82, -71.18], [20.75, -71.15], [20.5, -71.25], [19.97, -71.03], [19.82, -70.68], [19.75, -70.65], [19.5, -70.75], [19.25, -70.65], [19.0, -70.75], [18.75, -70.65], [18.5, -70.75], [18.25, -70.65], [18.0, -70.75], [17.75, -70.65], [17.5, -70.75], [17.25, -70.65], [17.0, -70.75], [16.75, -70.65], [16.5, -70.75], [16.0, -70.54], [15.5, -70.75], [15.25, -70.65], [15.0, -70.75], [14.75, -70.65], [14.5, -70.75], [14.25, -70.65], [14.0, -70.75], [13.47, -70.53]], [[21.25, -69.15], [21.18, -69.18], [21.13, -69.3], [21.25, -69.35], [21.5, -69.25], [21.25, -69.15]]]]}, "2018-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, -70.53], [13.25, -70.0], [13.47, -69.47], [14.0, -69.25], [14.25, -69.35], [14.5, -69.25], [14.75, -69.35], [14.87, -69.3], [14.75, -69.0], [14.97, -68.47], [15.32, -68.32], [15.47, -67.97], [16.0, -67.75], [16.25, -67.85], [16.5, -67.75], [16.75, -67.85], [17.0, -67.75], [17.25, -67.85], [17.5, -67.75], [17.75, -67.85], [18.0, -67.75], [18.25, -67.85], [18.5, -67.75], [18.75, -67.85], [19.0, -67.75], [19.25, -67.85], [19.5, -67.75], [19.75, -67.85], [20.0, -67.75], [20.25, -67.85], [20.5, -67.75], [20.75, -67.85], [21.0, -67.75], [21.25, -67.85], [21.5, -67.75], [22.03, -67.97], [22.25, -68.5], [22.03, -69.03], [21.5, -69.25], [21.75, -69.35], [22.0, -69.25], [22.25, -69.35], [22.5, -69.25], [22.75, -69.35], [23.0, -69.25], [23.53, -69.47], [23.75, -70.0], [23.65, -70.25], [23.68, -70.32], [24.03, -70.47], [24.25, -71.0], [24.03, -71.53], [23.5, -71.75], [23.0, -71.54], [22.5, -71.75], [22.25, -71.65], [22.0, -71.75], [21.75, -71.65], [21.5, -71.75], [20.97, -71.53], [20.82, -71.18], [20.75, -71.15], [20.5, -71.25], [20.25, -71.15], [20.0, -71.25], [19.47, -71.03], [19.32, -70.68], [19.25, -70.65], [19.0, -70.75], [18.75, -70.65], [18.5, -70.75], [18.25, -70.65], [18.0, -70.75], [17.75, -70.65], [17.5, -70.75], [17.25, -70.65], [17.0, -70.75], [16.75, -70.65], [16.5, -70.75], [16.0, -70.54], [15.5, -70.75], [15.25, -70.65], [15.0, -70.75], [14.75, -70.65], [14.5, -70.75], [14.25, -70.65], [14.0, -70.75], [13.47, -70.53]], [[21.25, -69.15], [21.18, -69.18], [21.13, -69.3], [21.25, -69.35], [21.5, -69.25], [21.25, -69.15]]]]}, "2018-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, -70.53], [13.75, -70.0], [13.97, -69.47], [14.5, -69.25], [14.75, -69.35], [14.87, -69.3], [14.75, -69.0], [14.97, -68.47], [15.32, -68.32], [15.47, -67.97], [16.0, -67.75], [16.25, -67.85], [16.5, -67.75], [16.75, -67.85], [17.0, -67.75], [17.25, -67.85], [17.5, -67.75], [17.75, -67.85], [18.0, -67.75], [18.25, -67.85], [18.5, -67.75], [18.75, -67.85], [19.0, -67.75], [19.25, -67.85], [19.5, -67.75], [19.75, -67.85], [20.0, -67.75], [20.25, -67.85], [20.5, -67.75], [20.75, -67.85], [21.0, -67.75], [21.25, -67.85], [21.5, -67.75], [22.03, -67.97], [22.25, -68.5], [22.03, -69.03], [21.5, -69.25], [21.75, -69.35], [22.0, -69.25], [22.53, -69.47], [22.68, -69.82], [22.75, -69.85], [23.0, -69.75], [23.53, -69.97], [23.68, -70.32], [24.03, -70.47], [24.25, -71.0], [24.03, -71.53], [23.5, -71.75], [23.0, -71.54], [22.5, -71.75], [22.25, -71.65], [22.0, -71.75], [21.75, -71.65], [21.5, -71.75], [20.97, -71.53], [20.82, -71.18], [20.75, -71.15], [20.5, -71.25], [20.25, -71.15], [20.0, -71.25], [19.47, -71.03], [19.32, -70.68], [19.25, -70.65], [19.0, -70.75], [18.75, -70.65], [18.5, -70.75], [18.25, -70.65], [18.0, -70.75], [17.75, -70.65], [17.5, -70.75], [17.25, -70.65], [17.0, -70.75], [16.75, -70.65], [16.5, -70.75], [16.0, -70.54], [15.5, -70.75], [15.25, -70.65], [15.0, -70.75], [14.75, -70.65], [14.5, -70.75], [13.97, -70.53]], [[21.25, -69.15], [21.18, -69.18], [21.13, -69.3], [21.25, -69.35], [21.5, -69.25], [21.25, -69.15]]]]}, "2018-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, -71.03], [19.25, -70.5], [19.47, -69.97], [20.0, -69.75], [20.25, -69.85], [20.5, -69.75], [20.75, -69.85], [21.0, -69.75], [21.25, -69.85], [21.5, -69.75], [21.75, -69.85], [22.0, -69.75], [22.25, -69.85], [22.5, -69.75], [22.75, -69.85], [23.0, -69.75], [23.53, -69.97], [23.68, -70.32], [24.03, -70.47], [24.25, -71.0], [24.03, -71.53], [23.5, -71.75], [22.97, -71.53], [22.82, -71.18], [22.75, -71.15], [22.5, -71.25], [22.25, -71.15], [22.0, -71.25], [21.75, -71.15], [21.5, -71.25], [21.25, -71.15], [21.0, -71.25], [20.75, -71.15], [20.5, -71.25], [20.25, -71.15], [20.0, -71.25], [19.47, -71.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.937974202175013}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.202189802940946}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.902861413460073, -20.940304514213295, -21.0436899696424, -21.823374782201086, -21.787082096507987, -25.28890363406188]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.91807282713023, -25.967128398024187, -27.614545178509957, -29.924566500043028, -29.9752756295064, -27.310369142613922]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.409886553252063, -6.449469421449835, -6.908780525200195, -7.503039130672513, -7.526759727931725, -8.353208984414646]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.58887189436183, -9.118405950713537, -10.474184848984862, -12.337522483801195, -12.937974202175013, -9.965411682023301]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3791859957622614, -1.3989084106272915, -1.4843391485188588, -1.6201620593265833, -1.6508968584851413, -1.6673424801054644]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5490081393647988, -1.6503668149813016, -1.892911064977236, -2.238450269462212, -2.3999631898422393, -1.821870860869598]}}