{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:42.059455", "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-23_to_2018-May-25_134.5_46.0"}, "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": 2018050000932}, "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 23 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 88143.73614869762}, "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": ["China", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "Russian-Far-East"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 46.0}, "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": 134.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "134.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 131.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 136.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.47, 46.53], [132.0, 46.75], [132.25, 46.65], [132.5, 46.75], [132.75, 46.65], [132.82, 46.68], [132.85, 46.75], [132.75, 47.0], [132.97, 47.53], [133.5, 47.75], [133.75, 47.65], [133.82, 47.68], [133.97, 48.03], [134.5, 48.25], [134.75, 48.15], [135.0, 48.25], [135.25, 48.15], [135.5, 48.25], [136.03, 48.03], [136.25, 47.5], [136.15, 47.25], [136.18, 47.18], [136.53, 47.03], [136.75, 46.5], [136.65, 46.25], [136.75, 46.0], [136.65, 45.75], [136.75, 45.5], [136.53, 44.97], [136.18, 44.82], [136.03, 44.47], [135.5, 44.25], [135.25, 44.35], [135.18, 44.32], [135.03, 43.97], [134.5, 43.75], [134.25, 43.85], [134.0, 43.75], [133.75, 43.85], [133.5, 43.75], [133.25, 43.85], [133.0, 43.75], [132.47, 43.97], [132.25, 44.5], [132.38, 44.8], [132.25, 44.85], [132.0, 44.75], [131.47, 44.97], [131.25, 45.5], [131.35, 45.75], [131.25, 46.0], [131.47, 46.53]]]]}, "2018-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.47, 46.53], [132.0, 46.75], [132.25, 46.65], [132.5, 46.75], [132.75, 46.65], [132.82, 46.68], [132.85, 46.75], [132.75, 47.0], [132.97, 47.53], [133.5, 47.75], [133.75, 47.65], [133.82, 47.68], [133.97, 48.03], [134.5, 48.25], [134.75, 48.15], [135.0, 48.25], [135.25, 48.15], [135.5, 48.25], [136.03, 48.03], [136.25, 47.5], [136.15, 47.25], [136.18, 47.18], [136.53, 47.03], [136.75, 46.5], [136.65, 46.25], [136.75, 46.0], [136.65, 45.75], [136.75, 45.5], [136.53, 44.97], [136.18, 44.82], [136.03, 44.47], [135.5, 44.25], [135.25, 44.35], [135.18, 44.32], [135.03, 43.97], [134.5, 43.75], [134.25, 43.85], [134.0, 43.75], [133.75, 43.85], [133.5, 43.75], [133.25, 43.85], [133.0, 43.75], [132.47, 43.97], [132.25, 44.5], [132.38, 44.8], [132.25, 44.85], [132.0, 44.75], [131.47, 44.97], [131.25, 45.5], [131.35, 45.75], [131.25, 46.0], [131.47, 46.53]]]]}, "2018-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.47, 46.53], [132.0, 46.75], [132.25, 46.65], [132.5, 46.75], [132.75, 46.65], [132.82, 46.68], [132.85, 46.75], [132.75, 47.0], [132.97, 47.53], [133.5, 47.75], [133.75, 47.65], [133.82, 47.68], [133.97, 48.03], [134.5, 48.25], [134.75, 48.15], [135.0, 48.25], [135.25, 48.15], [135.5, 48.25], [136.03, 48.03], [136.25, 47.5], [136.15, 47.25], [136.18, 47.18], [136.53, 47.03], [136.75, 46.5], [136.65, 46.25], [136.75, 46.0], [136.65, 45.75], [136.75, 45.5], [136.53, 44.97], [136.18, 44.82], [136.03, 44.47], [135.5, 44.25], [135.25, 44.35], [135.18, 44.32], [135.03, 43.97], [134.5, 43.75], [134.25, 43.85], [134.0, 43.75], [133.75, 43.85], [133.5, 43.75], [133.25, 43.85], [133.0, 43.75], [132.47, 43.97], [132.25, 44.5], [132.38, 44.8], [132.25, 44.85], [132.0, 44.75], [131.47, 44.97], [131.25, 45.5], [131.35, 45.75], [131.25, 46.0], [131.47, 46.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.80722747256408}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.27879543081162}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.849876646848372, 8.72188776831132, 8.544882101513792]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.857486822319004, 5.805527068808317, 5.686864556228613]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.756385250423633, -4.916845430975402, -5.163155611035821]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.80722747256408, -5.72982721746024, -6.189820460425608]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.752839552963629, -1.5381223545656943, -1.654838604989293]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.103806737596333, -1.801279459521319, -1.87373813767228]}}