{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:28.043423", "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": "2015-Mar-04_to_2015-Mar-06_119.0_29.5"}, "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": 2015030000275}, "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": "March 04 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 06 2015"}, "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": 94694.37489577124}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": ["Eastern China Sea"]}, "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": 29.5}, "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": 119.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 116.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.75, 28.5], [115.97, 29.03], [116.32, 29.18], [116.47, 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29.03], [116.32, 29.18], [116.47, 29.53], [116.82, 29.68], [116.97, 30.03], [117.5, 30.25], [117.75, 30.15], [117.82, 30.18], [117.97, 30.53], [118.5, 30.75], [118.75, 30.65], [118.82, 30.68], [118.97, 31.03], [119.5, 31.25], [120.03, 31.03], [120.18, 30.68], [120.53, 30.53], [120.75, 30.0], [120.65, 29.75], [120.75, 29.5], [120.65, 29.25], [120.68, 29.18], [120.75, 29.15], [120.82, 29.18], [120.97, 29.53], [121.5, 29.75], [122.03, 29.53], [122.25, 29.0], [122.04, 28.5], [122.25, 28.0], [122.03, 27.47], [121.5, 27.25], [121.25, 27.35], [121.0, 27.25], [120.5, 27.46], [120.0, 27.25], [119.47, 27.47], [119.32, 27.82], [119.25, 27.85], [119.18, 27.82], [119.15, 27.75], [119.25, 27.5], [119.03, 26.97], [118.5, 26.75], [117.97, 26.97], [117.75, 27.5], [117.85, 27.75], [117.82, 27.82], [117.75, 27.85], [117.68, 27.82], [117.53, 27.47], [117.0, 27.25], [116.47, 27.47], [116.32, 27.82], [115.97, 27.97], [115.75, 28.5]]]]}, "2015-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.75, 28.5], [115.97, 29.03], [116.32, 29.18], [116.47, 29.53], [116.82, 29.68], [116.97, 30.03], [117.5, 30.25], [117.75, 30.15], [117.82, 30.18], [117.97, 30.53], [118.5, 30.75], [118.75, 30.65], [118.82, 30.68], [118.97, 31.03], [119.5, 31.25], [120.03, 31.03], [120.18, 30.68], [120.53, 30.53], [120.75, 30.0], [120.65, 29.75], [120.75, 29.5], [120.65, 29.25], [120.68, 29.18], [120.75, 29.15], [120.82, 29.18], [120.97, 29.53], [121.5, 29.75], [122.03, 29.53], [122.25, 29.0], [122.04, 28.5], [122.25, 28.0], [122.03, 27.47], [121.5, 27.25], [121.25, 27.35], [121.0, 27.25], [120.5, 27.46], [120.0, 27.25], [119.47, 27.47], [119.32, 27.82], [119.25, 27.85], [119.18, 27.82], [119.15, 27.75], [119.25, 27.5], [119.03, 26.97], [118.5, 26.75], [117.97, 26.97], [117.75, 27.5], [117.85, 27.75], [117.82, 27.82], [117.75, 27.85], [117.68, 27.82], [117.53, 27.47], [117.0, 27.25], [116.47, 27.47], [116.32, 27.82], [115.97, 27.97], [115.75, 28.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.812297666976747}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.861356660341421}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.473863638476871, 3.4734598090016675, 4.9766504493813954]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.9027123852055752, 0.08985416741887775, 2.405264786729674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.525449120503875, -6.7026115210520825, -5.356009339468307]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.646480840917377, -7.812297666976747, 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