{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:41.603940", "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": "2019-May-14_to_2019-May-21_70.0_-71.5"}, "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": 2019050000406}, "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 14 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 52436.82605031025}, "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": -71.5}, "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": 70.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "70.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 67.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 73.75}, "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": -68.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[68.97, -70.97], [69.5, -70.75], [68.97, -70.53], [68.75, -70.0], [68.97, -69.47], [69.5, -69.25], [69.75, -69.35], [70.0, -69.25], [70.53, -69.47], [70.75, -70.0], [70.63, -70.3], [71.03, -70.47], [71.2, -70.87], [71.5, -70.75], [71.75, -70.85], [72.0, -70.75], [72.53, -70.97], [72.75, -71.5], [72.53, -72.03], [72.0, -72.25], [71.75, -72.15], [71.68, -72.18], [71.53, -72.53], [71.0, -72.75], [70.75, -72.65], [70.5, -72.75], [70.0, -72.54], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.47, -73.03], [68.25, -72.5], [68.47, -71.97], [68.82, -71.82], [68.85, -71.75], [68.75, -71.5], [68.97, -70.97]], [[69.75, -70.85], [69.82, -70.82], [69.88, -70.7], [69.75, -70.65], [69.5, -70.75], [69.75, -70.85]]], [[[71.75, -70.0], [71.97, -69.47], [72.5, -69.25], [72.75, -69.35], [73.0, -69.25], [73.25, -69.35], [73.5, -69.25], [74.03, -69.47], [74.25, -70.0], [74.03, -70.53], [73.5, -70.75], [73.25, -70.65], [73.0, -70.75], [72.75, -70.65], [72.5, -70.75], [71.97, -70.53], [71.75, -70.0]]]]}, "2019-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.97, -73.03], [67.75, -72.5], [67.97, -71.97], [68.5, -71.75], [68.75, -71.85], [68.82, -71.82], [68.85, -71.75], [68.75, -71.5], [68.97, -70.97], [69.5, -70.75], [69.25, -70.65], [69.0, -70.75], [68.47, -70.53], [68.25, -70.0], [68.47, -69.47], [69.0, -69.25], [69.25, -69.35], [69.5, -69.25], [69.75, -69.35], [70.0, -69.25], [70.53, -69.47], [70.75, -70.0], [70.63, -70.3], [70.75, -70.35], [71.0, -70.25], [71.25, -70.35], [71.32, -70.32], [71.47, -69.97], [71.82, -69.82], [71.97, -69.47], [72.5, -69.25], [72.75, -69.35], [73.0, -69.25], [73.25, -69.35], [73.5, -69.25], [74.03, -69.47], [74.25, -70.0], [74.03, -70.53], [73.5, -70.75], [73.25, -70.65], [73.0, -70.75], [72.75, -70.65], [72.68, -70.68], [72.54, -71.0], [72.75, -71.5], [72.53, -72.03], [72.0, -72.25], [71.75, -72.15], [71.68, -72.18], [71.53, -72.53], [71.0, -72.75], [70.75, -72.65], [70.5, -72.75], [70.0, -72.54], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.75, -73.15], [68.5, -73.25], [67.97, -73.03]], [[69.75, -70.85], [69.82, -70.82], [69.88, -70.7], [69.75, -70.65], [69.5, -70.75], [69.75, -70.85]]]]}, "2019-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.97, -73.03], [67.75, -72.5], [67.97, -71.97], [68.5, -71.75], [68.75, -71.85], [68.82, -71.82], [68.85, -71.75], [68.75, -71.5], [68.97, -70.97], [69.5, -70.75], [69.25, -70.65], [69.0, -70.75], [68.47, -70.53], [68.25, -70.0], [68.47, -69.47], [69.0, -69.25], [69.25, -69.35], [69.5, -69.25], [69.75, -69.35], [70.0, -69.25], [70.53, -69.47], [70.75, -70.0], [70.63, -70.3], [70.75, -70.35], [71.0, -70.25], [71.25, -70.35], [71.32, -70.32], [71.47, -69.97], [71.82, -69.82], [71.97, -69.47], [72.5, -69.25], [72.75, -69.35], [73.0, -69.25], [73.25, -69.35], [73.5, -69.25], [74.03, -69.47], [74.25, -70.0], [74.03, -70.53], [73.5, -70.75], [73.25, -70.65], [73.0, -70.75], [72.75, -70.65], [72.68, -70.68], [72.54, -71.0], [72.75, -71.5], [72.53, -72.03], [72.0, -72.25], [71.75, -72.15], [71.68, -72.18], [71.53, -72.53], [71.0, -72.75], [70.75, -72.65], [70.5, -72.75], [70.25, -72.65], [70.0, -72.75], [69.75, -72.65], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.75, -73.15], [68.5, -73.25], [67.97, -73.03]], [[69.75, -70.85], [69.82, -70.82], [69.88, -70.7], [69.75, -70.65], [69.5, -70.75], [69.75, -70.85]]]]}, "2019-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, -72.0], [67.47, -71.47], [68.0, -71.25], [68.25, -71.35], [68.32, -71.32], [68.46, -71.0], [68.32, -70.68], [67.97, -70.53], [67.75, -70.0], [67.97, -69.47], [68.5, -69.25], [68.75, -69.35], [69.0, -69.25], [69.25, -69.35], [69.5, -69.25], [69.75, -69.35], [70.0, -69.25], [70.25, -69.35], [70.5, -69.25], [70.75, -69.35], [71.0, -69.25], [71.25, -69.35], [71.5, -69.25], [71.75, -69.35], [72.0, -69.25], [72.53, -69.47], [72.75, -70.0], [72.65, -70.25], [72.75, -70.5], [72.54, -71.0], [72.75, -71.5], [72.53, -72.03], [72.0, -72.25], [71.75, -72.15], [71.68, -72.18], [71.53, -72.53], [71.0, -72.75], [70.75, -72.65], [70.5, -72.75], [70.25, -72.65], [70.0, -72.75], [69.75, -72.65], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.75, -73.15], [68.5, -73.25], [67.97, -73.03], [67.82, -72.68], [67.47, -72.53], [67.25, -72.0]]]]}, "2019-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, -72.0], [67.47, -71.47], [68.0, -71.25], [68.25, -71.35], [68.32, -71.32], [68.35, -71.25], [68.25, -71.0], [68.35, -70.75], [68.32, -70.68], [67.97, -70.53], [67.75, -70.0], [67.97, -69.47], [68.5, -69.25], [68.75, -69.35], [69.0, -69.25], [69.25, -69.35], [69.5, -69.25], [69.75, -69.35], [70.0, -69.25], [70.25, -69.35], [70.5, -69.25], [70.75, -69.35], [71.0, -69.25], [71.25, -69.35], [71.5, -69.25], [71.75, -69.35], [72.0, -69.25], [72.53, -69.47], [72.75, -70.0], [72.65, -70.25], [72.75, -70.5], [72.54, -71.0], [72.75, -71.5], [72.53, -72.03], [72.0, -72.25], [71.75, -72.15], [71.68, -72.18], [71.53, -72.53], [71.0, -72.75], [70.75, -72.65], [70.5, -72.75], [70.25, -72.65], [70.0, -72.75], [69.75, -72.65], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.75, -73.15], [68.5, -73.25], [67.97, -73.03], [67.82, -72.68], [67.47, -72.53], [67.25, -72.0]]]]}, "2019-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.25, -72.0], [67.47, -71.47], [68.0, -71.25], [68.25, -71.35], [68.32, -71.32], [68.35, -71.25], [68.25, -71.0], [68.35, -70.75], [68.32, -70.68], [67.97, -70.53], [67.75, -70.0], [67.97, -69.47], [68.32, -69.32], [68.47, -68.97], [69.0, -68.75], [69.25, -68.85], [69.5, -68.75], [69.75, -68.85], [69.82, -68.82], [69.97, -68.47], [70.5, -68.25], [70.75, -68.35], [71.0, -68.25], [71.25, -68.35], [71.5, -68.25], [71.75, -68.35], [72.0, -68.25], [72.25, -68.35], [72.5, -68.25], [73.03, -68.47], [73.25, -69.0], [73.03, -69.53], [72.68, -69.68], [72.65, -69.75], [72.75, -70.0], [72.53, -70.53], [72.18, -70.68], [72.03, -71.03], [71.68, -71.18], [71.53, -71.53], [71.18, -71.68], [71.03, -72.03], [70.68, -72.18], [70.53, -72.53], [70.0, -72.75], [69.75, -72.65], [69.68, -72.68], [69.53, -73.03], [69.0, -73.25], [68.75, -73.15], [68.5, -73.25], [67.97, -73.03], [67.82, -72.68], [67.47, -72.53], [67.25, -72.0]]]]}, "2019-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.75, -70.0], [67.97, -69.47], [68.32, -69.32], [68.47, -68.97], [69.0, -68.75], [69.25, -68.85], [69.5, -68.75], [69.75, -68.85], [69.82, -68.82], [69.97, -68.47], [70.5, -68.25], [70.75, -68.35], [71.0, -68.25], [71.25, -68.35], [71.5, -68.25], [71.75, -68.35], [72.0, -68.25], [72.25, -68.35], [72.5, -68.25], [73.03, -68.47], [73.25, -69.0], [73.03, -69.53], [72.68, -69.68], [72.65, -69.75], [72.75, -70.0], [72.53, -70.53], [72.0, -70.75], [71.75, -70.65], [71.68, -70.68], [71.65, -70.75], [71.75, -71.0], [71.53, -71.53], [71.0, -71.75], [70.75, -71.65], [70.68, -71.68], [70.53, -72.03], [70.18, -72.18], [70.03, -72.53], [69.5, -72.75], [69.25, -72.65], [69.0, -72.75], [68.75, -72.65], [68.5, -72.75], [67.97, -72.53], [67.75, -72.0], [67.97, -71.47], [68.38, -71.3], [68.25, -71.0], [68.35, -70.75], [68.32, -70.68], [67.97, -70.53], [67.75, -70.0]]]]}, "2019-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[67.75, -70.0], [67.97, -69.47], [68.32, -69.32], [68.47, -68.97], [69.0, -68.75], [69.25, -68.85], [69.5, -68.75], [69.75, -68.85], [69.82, -68.82], [69.97, -68.47], [70.5, -68.25], [70.75, -68.35], [71.0, -68.25], [71.25, -68.35], [71.5, -68.25], [71.75, -68.35], [72.0, -68.25], [72.25, -68.35], [72.5, -68.25], [73.03, -68.47], [73.25, -69.0], [73.03, -69.53], [72.68, -69.68], [72.65, -69.75], [72.75, -70.0], [72.53, -70.53], [72.0, -70.75], [71.75, -70.65], [71.68, -70.68], [71.65, -70.75], [71.75, -71.0], [71.53, -71.53], [71.0, -71.75], [70.75, -71.65], [70.68, -71.68], [70.53, -72.03], [70.0, -72.25], [69.47, -72.03], [69.32, -71.68], [69.25, -71.65], [69.0, -71.75], [68.47, -71.53], [68.25, -71.0], [68.35, -70.75], [68.32, -70.68], [67.97, -70.53], [67.75, -70.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.092799159300597}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.813957995216935}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-37.62899782021074, -38.35121724445449, -38.015484266043785, -38.781278560739594, -38.45051924806262, -37.55746904890202, -36.274060384190136, -36.50452294896556]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-43.097352196172324, -42.40271877565726, -43.051178549411446, -45.30029769462121, -46.22993793590874, -46.62935215270488, -42.32457251584927, -42.51413602873751]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.285717507356406, -11.150945600317025, -10.011063464394713, -10.236298310810215, -9.961055064382302, -9.612362579971155, -8.660136026214602, -9.138122466690861]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.994131272966229, -12.578849248351617, -12.126628339137767, -13.901460858610164, -14.747278088205292, -15.092799159300597, -10.252892930154133, -11.19288553296397]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6269711238806632, -1.6157537604960606, -1.4898825385990886, -1.6611509601860366, -1.6007930536773207, -1.538290750894682, -1.3758531779663037, -1.4370059760142058]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9482946163469383, -1.8976235888541029, -1.7684292125467227, -2.113087406097725, -2.208621355990199, -2.2035957031104623, -1.5773118659148728, -1.700152097355908]}}