{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:37.851762", "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": "2010-Sep-16_to_2010-Sep-18_121.0_40.5"}, "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": 2010090000754}, "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": "September 16 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 18 2010"}, "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": 78689.12948821888}, "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": ["Yellow 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": 40.5}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 118.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 42.03], [118.82, 42.18], [118.97, 42.53], [119.5, 42.75], [119.75, 42.65], [119.82, 42.68], [119.97, 43.03], [120.5, 43.25], [120.75, 43.15], [121.0, 43.25], [121.25, 43.15], [121.5, 43.25], [121.75, 43.15], [122.0, 43.25], [122.25, 43.15], [122.5, 43.25], [122.75, 43.15], [123.0, 43.25], [123.53, 43.03], [123.75, 42.5], [123.65, 42.25], [123.75, 42.0], [123.53, 41.47], [123.13, 41.3], [123.25, 41.0], [123.03, 40.47], [122.68, 40.32], [122.53, 39.97], [122.0, 39.75], [121.75, 39.85], [121.5, 39.75], [121.25, 39.85], [121.18, 39.82], [121.03, 39.47], [120.5, 39.25], [119.97, 39.47], [119.75, 40.0], [119.85, 40.25], [119.82, 40.32], [119.75, 40.35], [119.5, 40.25], [119.25, 40.35], [119.0, 40.25], [118.47, 40.47], [118.25, 41.0], [118.35, 41.25], [118.25, 41.5], [118.47, 42.03]]]]}, "2010-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 42.03], [118.82, 42.18], [118.97, 42.53], [119.5, 42.75], [119.75, 42.65], [119.82, 42.68], [119.97, 43.03], [120.5, 43.25], [120.75, 43.15], [121.0, 43.25], [121.25, 43.15], [121.5, 43.25], [121.75, 43.15], [122.0, 43.25], [122.25, 43.15], [122.5, 43.25], [122.75, 43.15], [123.0, 43.25], [123.53, 43.03], [123.75, 42.5], [123.65, 42.25], [123.75, 42.0], [123.53, 41.47], [123.13, 41.3], [123.25, 41.0], [123.03, 40.47], [122.68, 40.32], [122.53, 39.97], [122.0, 39.75], [121.75, 39.85], [121.5, 39.75], [121.25, 39.85], [121.18, 39.82], [121.03, 39.47], [120.5, 39.25], [119.97, 39.47], [119.75, 40.0], [119.85, 40.25], [119.82, 40.32], [119.75, 40.35], [119.5, 40.25], [119.25, 40.35], [119.0, 40.25], [118.47, 40.47], [118.25, 41.0], [118.35, 41.25], [118.25, 41.5], [118.47, 42.03]]]]}, "2010-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 42.03], [118.82, 42.18], [118.97, 42.53], [119.5, 42.75], [119.75, 42.65], [119.82, 42.68], [119.97, 43.03], [120.5, 43.25], [120.75, 43.15], [121.0, 43.25], [121.25, 43.15], [121.5, 43.25], [121.75, 43.15], [122.0, 43.25], [122.25, 43.15], [122.5, 43.25], [122.75, 43.15], [123.0, 43.25], [123.53, 43.03], [123.75, 42.5], [123.65, 42.25], [123.75, 42.0], [123.53, 41.47], [123.13, 41.3], [123.25, 41.0], [123.03, 40.47], [122.68, 40.32], [122.53, 39.97], [122.0, 39.75], [121.75, 39.85], [121.5, 39.75], [121.25, 39.85], [121.18, 39.82], [121.03, 39.47], [120.5, 39.25], [119.97, 39.47], [119.75, 40.0], [119.85, 40.25], [119.82, 40.32], [119.75, 40.35], [119.5, 40.25], [119.25, 40.35], [119.0, 40.25], [118.47, 40.47], [118.25, 41.0], [118.35, 41.25], [118.25, 41.5], [118.47, 42.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.619533353915813}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.162375026709096}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.13037646230481, 11.648362498809831, 12.438922567167083]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.797758143728913, 8.062163334365266, 9.654135744115479]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.140926425768403, -6.216227062850669, -5.129971591508213]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.9252095416547945, -7.619533353915813, -6.827731953550028]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6106730270924403, -2.4581632022997986, -1.9618174895683935]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.022028504943415, -3.510970905829155, -2.5951166623618063]}}