{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:31.689144", "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": "2025-Feb-03_to_2025-Feb-07_129.5_41.5"}, "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": 2025020000113}, "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": "February 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 07 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 55769.878394974476}, "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": ["Japan 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": 41.5}, "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": 129.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.25}, "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": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, 41.03], [126.82, 41.18], [126.97, 41.53], [127.38, 41.7], [127.25, 42.0], [127.47, 42.53], [128.0, 42.75], [128.25, 42.65], [128.5, 42.75], [128.75, 42.65], [129.0, 42.75], [129.25, 42.65], [129.5, 42.75], [130.03, 42.53], [130.25, 42.0], [130.15, 41.75], [130.25, 41.5], [130.03, 40.97], [129.68, 40.82], [129.53, 40.47], [129.0, 40.25], [128.75, 40.35], [128.5, 40.25], [128.25, 40.35], [128.18, 40.32], [128.15, 40.25], [128.25, 40.0], [128.03, 39.47], [127.5, 39.25], [127.25, 39.35], [127.0, 39.25], [126.47, 39.47], [126.25, 40.0], [126.35, 40.25], [126.25, 40.5], [126.47, 41.03]]]]}, "2025-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, 41.03], [126.82, 41.18], [126.97, 41.53], [127.38, 41.7], [127.32, 41.82], [126.97, 41.97], [126.75, 42.5], [126.85, 42.75], [126.75, 43.0], [126.97, 43.53], [127.5, 43.75], [128.03, 43.53], [128.25, 43.0], [128.15, 42.75], [128.18, 42.68], [128.25, 42.65], [128.5, 42.75], [128.75, 42.65], [129.0, 42.75], [129.25, 42.65], [129.32, 42.68], [129.47, 43.03], [130.0, 43.25], [130.53, 43.03], [130.75, 42.5], [130.65, 42.25], [130.75, 42.0], [130.53, 41.47], [130.18, 41.32], [130.15, 41.25], [130.25, 41.0], [130.03, 40.47], [129.68, 40.32], [129.53, 39.97], [129.0, 39.75], [128.75, 39.85], [128.68, 39.82], [128.53, 39.47], [128.0, 39.25], [127.75, 39.35], [127.5, 39.25], [127.25, 39.35], [127.0, 39.25], [126.47, 39.47], [126.25, 40.0], [126.35, 40.25], [126.25, 40.5], [126.47, 41.03]]]]}, "2025-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, 41.03], [126.82, 41.18], [126.97, 41.53], [127.38, 41.7], [127.32, 41.82], [126.97, 41.97], [126.75, 42.5], [126.85, 42.75], [126.75, 43.0], [126.97, 43.53], [127.5, 43.75], [128.03, 43.53], [128.25, 43.0], [128.15, 42.75], [128.18, 42.68], [128.25, 42.65], [128.5, 42.75], [128.75, 42.65], [129.0, 42.75], [129.25, 42.65], [129.32, 42.68], [129.47, 43.03], [130.0, 43.25], [130.53, 43.03], [130.75, 42.5], [130.65, 42.25], [130.75, 42.0], [130.53, 41.47], [130.18, 41.32], [130.15, 41.25], [130.25, 41.0], [130.03, 40.47], [129.68, 40.32], [129.53, 39.97], [129.0, 39.75], [128.75, 39.85], [128.68, 39.82], [128.53, 39.47], [128.0, 39.25], [127.75, 39.35], [127.5, 39.25], [127.25, 39.35], [127.0, 39.25], [126.47, 39.47], [126.25, 40.0], [126.35, 40.25], [126.25, 40.5], [126.47, 41.03]]]]}, "2025-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.32, 41.18], [127.46, 41.5], [127.32, 41.82], [126.97, 41.97], [126.75, 42.5], [126.85, 42.75], [126.75, 43.0], [126.97, 43.53], [127.5, 43.75], [128.03, 43.53], [128.25, 43.0], [128.15, 42.75], [128.18, 42.68], [128.25, 42.65], [128.5, 42.75], [128.75, 42.65], [129.0, 42.75], [129.25, 42.65], [129.32, 42.68], [129.47, 43.03], [130.0, 43.25], [130.53, 43.03], [130.75, 42.5], [130.65, 42.25], [130.75, 42.0], [130.53, 41.47], [130.18, 41.32], [130.15, 41.25], [130.25, 41.0], [130.03, 40.47], [129.68, 40.32], [129.53, 39.97], [129.0, 39.75], [128.75, 39.85], [128.68, 39.82], [128.53, 39.47], [128.0, 39.25], [127.75, 39.35], [127.5, 39.25], [127.25, 39.35], [127.0, 39.25], [126.47, 39.47], [126.25, 40.0], [126.47, 40.53], [126.82, 40.68], [126.97, 41.03], [127.32, 41.18]]]]}, "2025-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.32, 41.18], [127.46, 41.5], [127.25, 42.0], [127.47, 42.53], [128.0, 42.75], [128.25, 42.65], [128.5, 42.75], [128.75, 42.65], [129.0, 42.75], [129.25, 42.65], [129.5, 42.75], [129.75, 42.65], [130.0, 42.75], [130.53, 42.53], [130.75, 42.0], [130.53, 41.47], [130.18, 41.32], [130.15, 41.25], [130.25, 41.0], [130.03, 40.47], [129.68, 40.32], [129.53, 39.97], [129.0, 39.75], [128.75, 39.85], [128.68, 39.82], [128.53, 39.47], [128.0, 39.25], [127.75, 39.35], [127.5, 39.25], [127.25, 39.35], [127.0, 39.25], [126.47, 39.47], [126.25, 40.0], [126.47, 40.53], [126.82, 40.68], [126.97, 41.03], [127.32, 41.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.692089998697213}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.971630156243875}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.42981257968478, -20.46441198454957, -20.548750093248145, -17.716659753972806, -17.64648669728055]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.27432797749836, -27.1882582346598, -27.572349929809548, -23.749641799926735, -24.885616683959938]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.37273656774588, -9.06730468541855, -9.279883495264755, -6.959587241534948, -7.369213267526688]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.1443627249769, -11.455354283468012, -11.692089998697213, -8.702528796677058, -9.349871953293388]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4421489095056954, -2.122381559428901, -2.1187914141985087, -1.6050066336525866, -1.7299802039426826]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6777432802564176, -2.4734642807608966, -2.422880727383983, -2.166860392128237, -1.9917937288580292]}}