{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:13.430677", "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": "2017-Jun-09_to_2017-Jun-12_127.5_43.5"}, "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": 2017060000307}, "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": "June 09 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 12 2017"}, "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": 55109.036856604784}, "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": []}, "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": 43.5}, "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": 127.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 129.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-06-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.5, 43.25], [126.75, 43.15], [126.82, 43.18], [126.85, 43.25], [126.75, 43.5], [126.97, 44.03], [127.5, 44.25], [128.03, 44.03], [128.18, 43.68], [128.53, 43.53], [128.68, 43.18], [128.75, 43.15], [129.0, 43.25], [129.53, 43.03], [129.75, 42.5], [129.65, 42.25], [129.75, 42.0], [129.53, 41.47], [129.18, 41.32], [129.15, 41.25], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.0, 40.25], [126.47, 40.47], [126.25, 41.0], [126.35, 41.25], [126.32, 41.32], [126.25, 41.35], [126.0, 41.25], [125.47, 41.47], [125.25, 42.0], [125.47, 42.53], [125.82, 42.68], [125.97, 43.03], [126.5, 43.25]]]]}, "2017-06-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.5, 43.25], [126.75, 43.15], [126.82, 43.18], [126.85, 43.25], [126.75, 43.5], [126.97, 44.03], [127.5, 44.25], [128.03, 44.03], [128.18, 43.68], [128.53, 43.53], [128.68, 43.18], [128.75, 43.15], [129.0, 43.25], [129.53, 43.03], [129.75, 42.5], [129.65, 42.25], [129.75, 42.0], [129.53, 41.47], [129.18, 41.32], [129.15, 41.25], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.0, 40.25], [126.47, 40.47], [126.25, 41.0], [126.35, 41.25], [126.32, 41.32], [126.25, 41.35], [126.0, 41.25], [125.47, 41.47], [125.25, 42.0], [125.47, 42.53], [125.82, 42.68], [125.97, 43.03], [126.5, 43.25]]]]}, "2017-06-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.5, 43.25], [126.75, 43.15], [126.82, 43.18], [126.85, 43.25], [126.75, 43.5], [126.97, 44.03], [127.5, 44.25], [128.03, 44.03], [128.18, 43.68], [128.53, 43.53], [128.68, 43.18], [128.75, 43.15], [129.0, 43.25], [129.53, 43.03], [129.75, 42.5], [129.65, 42.25], [129.75, 42.0], [129.53, 41.47], [129.18, 41.32], [129.15, 41.25], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.0, 40.25], [126.47, 40.47], [126.25, 41.0], [126.35, 41.25], [126.32, 41.32], [126.25, 41.35], [126.0, 41.25], [125.47, 41.47], [125.25, 42.0], [125.47, 42.53], [125.82, 42.68], [125.97, 43.03], [126.5, 43.25]]]]}, "2017-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.5, 41.75], [129.03, 41.53], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [127.97, 40.47], [127.75, 41.0], [127.97, 41.53], [128.5, 41.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.983108788960408}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.57813219750002}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.971842606495272, 11.73595276415682, 11.968537970024158, 10.443444348921787]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.304090073033251, 8.34940027487795, 8.921267057958914, 10.443444348921787]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.744422326022847, -4.085761493105221, -3.9510234739246877, -3.4546753842353155]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.983108788960408, -5.60084921697711, -4.654090277460057, -3.4546753842353155]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.974561132247756, -1.4069069873307487, -1.3663877988618722, -1.3093670925706415]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.546640288201657, -1.782830363984692, -1.5829491252555545, -1.3093670925706415]}}