{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:16.458688", "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": "2013-Jan-24_to_2013-Jan-27_125.0_39.5"}, "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": 2013010000783}, "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": "January 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 71840.68321501756}, "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", "North Korea"]}, "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": 39.5}, "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": 125.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "125.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 120.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 125.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 40.0], [119.97, 40.53], [120.32, 40.68], [120.47, 41.03], [121.0, 41.25], [121.25, 41.15], [121.5, 41.25], [121.75, 41.15], [122.0, 41.25], [122.53, 41.03], [122.75, 40.5], [122.57, 40.07], [123.0, 40.25], [123.25, 40.15], [123.5, 40.25], [123.75, 40.15], [124.0, 40.25], [124.25, 40.15], [124.5, 40.25], [124.75, 40.15], [125.0, 40.25], [125.53, 40.03], [125.75, 39.5], [125.65, 39.25], [125.75, 39.0], [125.53, 38.47], [125.18, 38.32], [125.03, 37.97], [124.5, 37.75], [124.25, 37.85], [124.0, 37.75], [123.75, 37.85], [123.5, 37.75], [123.25, 37.85], [123.18, 37.82], [123.03, 37.47], [122.5, 37.25], [121.97, 37.47], [121.82, 37.82], [121.75, 37.85], [121.5, 37.75], [120.97, 37.97], [120.82, 38.32], [120.47, 38.47], [120.25, 39.0], [120.35, 39.25], [120.32, 39.32], [119.97, 39.47], [119.75, 40.0]], [[122.18, 39.82], [122.07, 39.57], [122.32, 39.68], [122.43, 39.93], [122.18, 39.82]]]]}, "2013-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 40.0], [119.97, 40.53], [120.32, 40.68], [120.47, 41.03], [121.0, 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40.53], [120.32, 40.68], [120.47, 41.03], [121.0, 41.25], [121.25, 41.15], [121.5, 41.25], [121.75, 41.15], [122.0, 41.25], [122.53, 41.03], [122.75, 40.5], [122.57, 40.07], [123.0, 40.25], [123.25, 40.15], [123.5, 40.25], [123.75, 40.15], [124.0, 40.25], [124.25, 40.15], [124.5, 40.25], [124.75, 40.15], [125.0, 40.25], [125.25, 40.15], [125.5, 40.25], [126.03, 40.03], [126.25, 39.5], [126.15, 39.25], [126.25, 39.0], [126.03, 38.47], [125.5, 38.25], [125.25, 38.35], [125.18, 38.32], [125.03, 37.97], [124.5, 37.75], [124.25, 37.85], [124.0, 37.75], [123.75, 37.85], [123.5, 37.75], [123.25, 37.85], [123.18, 37.82], [123.03, 37.47], [122.5, 37.25], [121.97, 37.47], [121.82, 37.82], [121.75, 37.85], [121.5, 37.75], [120.97, 37.97], [120.82, 38.32], [120.47, 38.47], [120.25, 39.0], [120.35, 39.25], [120.32, 39.32], [119.97, 39.47], [119.75, 40.0]], [[122.18, 39.82], [122.07, 39.57], [122.32, 39.68], [122.43, 39.93], [122.18, 39.82]]]]}, "2013-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 40.03], [125.5, 40.25], [126.03, 40.03], [126.25, 39.5], [126.15, 39.25], [126.25, 39.0], [126.03, 38.47], [125.5, 38.25], [124.97, 38.47], [124.75, 39.0], [124.85, 39.25], [124.75, 39.5], [124.97, 40.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.435403371084078}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.531454795301422}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.217318882605127, -8.52811112699959, -7.356100433680524, -9.79950571108725]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.03515348575462, -14.026174076110863, -12.55487287028501, -10.849093445599351]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.130697580649967, -6.291871248358463, -5.181198082244066, -4.9896597004265]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.2768997328414, -8.435403371084078, -6.99011827322505, -5.490496744922666]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.503180741041449, -1.878721288735312, -1.5755570005546906, -1.2956183005510475]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7003638836935717, -2.3707466431745408, -1.825803236748011, -1.3641182962009744]}}