{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:49.719639", "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": "2012-Mar-17_to_2012-Mar-20_127.0_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": 2012030001057}, "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 17 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2012"}, "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": 92309.70193313563}, "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", "E.Siberia"]}, "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": 127.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.25}, "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": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 44.53], [125.5, 44.75], [125.75, 44.65], [125.82, 44.68], [125.97, 45.03], [126.5, 45.25], [126.75, 45.15], [126.82, 45.18], [126.85, 45.25], [126.75, 45.5], [126.97, 46.03], [127.5, 46.25], [128.0, 46.04], [128.5, 46.25], [128.75, 46.15], [129.0, 46.25], [129.53, 46.03], [129.75, 45.5], [129.53, 44.97], [129.18, 44.82], [129.03, 44.47], [128.68, 44.32], [128.65, 44.25], [128.75, 44.0], [128.65, 43.75], [128.75, 43.5], [128.53, 42.97], [128.0, 42.75], [127.75, 42.85], [127.68, 42.82], [127.53, 42.47], [127.0, 42.25], [126.75, 42.35], [126.5, 42.25], [126.25, 42.35], [126.0, 42.25], [125.47, 42.47], [125.32, 42.82], [124.97, 42.97], [124.75, 43.5], [124.85, 43.75], [124.75, 44.0], [124.97, 44.53]]]]}, "2012-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 44.53], [125.5, 44.75], [125.75, 44.65], [125.82, 44.68], [125.97, 45.03], [126.5, 45.25], [126.75, 45.15], [126.82, 45.18], [126.85, 45.25], [126.75, 45.5], [126.97, 46.03], [127.5, 46.25], [128.0, 46.04], [128.5, 46.25], [128.75, 46.15], [129.0, 46.25], [129.53, 46.03], [129.75, 45.5], [129.53, 44.97], [129.18, 44.82], [129.03, 44.47], [128.68, 44.32], [128.65, 44.25], [128.75, 44.0], [128.65, 43.75], [128.68, 43.68], [129.03, 43.53], [129.25, 43.0], [129.15, 42.75], [129.25, 42.5], [129.15, 42.25], [129.18, 42.18], [129.53, 42.03], [129.75, 41.5], [129.53, 40.97], [129.18, 40.82], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.18, 40.32], [128.03, 39.97], [127.5, 39.75], [127.25, 39.85], [127.0, 39.75], [126.47, 39.97], [126.25, 40.5], [126.35, 40.75], [126.25, 41.0], [126.47, 41.53], [127.0, 41.75], [126.75, 41.85], [126.5, 41.75], [125.97, 41.97], [125.82, 42.32], [125.47, 42.47], [125.32, 42.82], [124.97, 42.97], [124.75, 43.5], [124.85, 43.75], [124.75, 44.0], [124.97, 44.53]], [[127.25, 41.65], [127.5, 41.75], [127.25, 41.85], [127.0, 41.75], [127.25, 41.65]], [[127.75, 41.65], [127.82, 41.68], [127.85, 41.75], [127.8, 41.88], [127.5, 41.75], [127.75, 41.65]]]]}, "2012-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 44.53], [125.5, 44.75], [125.75, 44.65], [125.82, 44.68], [125.97, 45.03], [126.5, 45.25], [126.75, 45.15], [126.82, 45.18], [126.85, 45.25], [126.75, 45.5], [126.97, 46.03], [127.5, 46.25], [128.0, 46.04], [128.5, 46.25], [128.75, 46.15], [129.0, 46.25], [129.53, 46.03], [129.75, 45.5], [129.53, 44.97], [129.18, 44.82], [129.03, 44.47], [128.68, 44.32], [128.65, 44.25], [128.75, 44.0], [128.65, 43.75], [128.68, 43.68], [129.03, 43.53], [129.25, 43.0], [129.15, 42.75], [129.25, 42.5], [129.15, 42.25], [129.18, 42.18], [129.53, 42.03], [129.75, 41.5], [129.53, 40.97], [129.18, 40.82], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.18, 40.32], [128.03, 39.97], [127.5, 39.75], [127.25, 39.85], [127.0, 39.75], [126.47, 39.97], [126.25, 40.5], [126.35, 40.75], [126.25, 41.0], [126.47, 41.53], [127.0, 41.75], [126.75, 41.85], [126.5, 41.75], [125.97, 41.97], [125.82, 42.32], [125.47, 42.47], [125.32, 42.82], [124.97, 42.97], [124.75, 43.5], [124.85, 43.75], [124.75, 44.0], [124.97, 44.53]], [[127.25, 41.65], [127.5, 41.75], [127.25, 41.85], [127.0, 41.75], [127.25, 41.65]], [[127.75, 41.65], [127.82, 41.68], [127.85, 41.75], [127.8, 41.88], [127.5, 41.75], [127.75, 41.65]]]]}, "2012-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.85, 43.25], [125.75, 43.5], [125.85, 43.75], [125.75, 44.0], [125.97, 44.53], [126.5, 44.75], [126.75, 44.65], [126.82, 44.68], [126.97, 45.03], [127.5, 45.25], [128.03, 45.03], [128.25, 44.5], [128.15, 44.25], [128.18, 44.18], [128.53, 44.03], [128.68, 43.68], [129.03, 43.53], [129.25, 43.0], [129.15, 42.75], [129.25, 42.5], [129.15, 42.25], [129.18, 42.18], [129.53, 42.03], [129.75, 41.5], [129.53, 40.97], [129.18, 40.82], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.18, 40.32], [128.03, 39.97], [127.5, 39.75], [127.25, 39.85], [127.0, 39.75], [126.47, 39.97], [126.25, 40.5], [126.35, 40.75], [126.25, 41.0], [126.47, 41.53], [127.0, 41.75], [126.75, 41.85], [126.5, 41.75], [125.97, 41.97], [125.75, 42.5], [125.85, 42.75], [125.75, 43.0], [125.85, 43.25]], [[127.25, 41.65], [127.5, 41.75], [127.25, 41.85], [127.0, 41.75], [127.25, 41.65]], [[127.75, 41.65], [127.82, 41.68], [127.85, 41.75], [127.8, 41.88], [127.5, 41.75], [127.75, 41.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.61011180126556}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.54342993743569}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.874075288949314, -11.700529213519815, -9.860327481654679, -9.741597243945591]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.410766157668007, -15.980128755904559, -13.869000357691505, -12.82606759017142]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.009406500925278, -9.333400890108077, -7.66061059875394, -7.280251850479697]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.61011180126556, -11.348532798682129, -11.224213215856139, -9.525177724307923]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2661182076384283, -2.0939994746745767, -1.7231903908808917, -1.6443322790507675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7487250961802068, -2.496956410635979, -2.5169480484180164, -2.108336157405854]}}