{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:08.690550", "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": "2026-Feb-06_to_2026-Feb-08_126.5_34.5"}, "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": 2026020000155}, "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 06 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 08 2026"}, "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": 59149.28028178631}, "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", "Korea, Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": ["Sea of Japan", "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": 34.5}, "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": 126.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "126.5\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": 127.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.25, 34.65], [121.5, 34.75], [121.75, 34.65], [122.0, 34.75], [122.25, 34.65], [122.5, 34.75], [123.03, 34.53], [123.18, 34.18], [123.25, 34.15], [123.5, 34.25], [123.75, 34.15], [124.0, 34.25], [124.25, 34.15], [124.5, 34.25], [124.75, 34.15], [125.0, 34.25], [125.25, 34.15], [125.32, 34.18], [125.47, 34.53], [125.82, 34.68], [125.97, 35.03], [126.5, 35.25], [126.75, 35.15], [127.0, 35.25], [127.53, 35.03], [127.75, 34.5], [127.65, 34.25], [127.75, 34.0], [127.53, 33.47], [127.0, 33.25], [126.75, 33.35], [126.68, 33.32], [126.53, 32.97], [126.0, 32.75], [125.75, 32.85], [125.5, 32.75], [125.25, 32.85], [125.18, 32.82], [125.03, 32.47], [124.5, 32.25], [124.25, 32.35], [124.0, 32.25], [123.47, 32.47], [123.32, 32.82], [123.25, 32.85], [123.0, 32.75], [122.75, 32.85], [122.5, 32.75], [122.25, 32.85], [122.0, 32.75], [121.75, 32.85], [121.5, 32.75], [121.25, 32.85], [121.0, 32.75], [120.75, 32.85], [120.5, 32.75], [119.97, 32.97], [119.75, 33.5], [119.97, 34.03], [120.32, 34.18], [120.47, 34.53], [121.0, 34.75], [121.25, 34.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 34.53], [121.0, 34.75], [121.25, 34.65], [121.5, 34.75], [121.75, 34.65], [122.0, 34.75], [122.25, 34.65], [122.5, 34.75], [123.03, 34.53], [123.18, 34.18], [123.25, 34.15], [123.5, 34.25], [123.75, 34.15], [124.0, 34.25], [124.25, 34.15], [124.5, 34.25], [124.75, 34.15], [125.0, 34.25], [125.25, 34.15], [125.32, 34.18], [125.47, 34.53], [125.82, 34.68], [125.97, 35.03], [126.5, 35.25], [126.75, 35.15], [127.0, 35.25], [127.53, 35.03], [127.75, 34.5], [127.65, 34.25], [127.75, 34.0], [127.53, 33.47], [127.0, 33.25], [126.75, 33.35], [126.68, 33.32], [126.53, 32.97], [126.0, 32.75], [125.75, 32.85], [125.5, 32.75], [125.25, 32.85], [125.18, 32.82], [125.03, 32.47], [124.5, 32.25], [124.25, 32.35], [124.0, 32.25], [123.47, 32.47], [123.32, 32.82], [123.25, 32.85], [123.0, 32.75], [122.75, 32.85], [122.5, 32.75], [122.25, 32.85], [122.0, 32.75], [121.75, 32.85], [121.5, 32.75], [121.25, 32.85], [121.0, 32.75], [120.75, 32.85], [120.5, 32.75], [119.97, 32.97], [119.75, 33.5], [119.97, 34.03], [120.32, 34.18], [120.47, 34.53]]]]}, "2026-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 34.53], [121.0, 34.75], [121.25, 34.65], [121.5, 34.75], [121.75, 34.65], [122.0, 34.75], [122.25, 34.65], [122.5, 34.75], [123.03, 34.53], [123.18, 34.18], [123.25, 34.15], [123.5, 34.25], [123.75, 34.15], [124.0, 34.25], [124.25, 34.15], [124.5, 34.25], [124.75, 34.15], [125.0, 34.25], [125.25, 34.15], [125.32, 34.18], [125.47, 34.53], [125.82, 34.68], [125.97, 35.03], [126.5, 35.25], [126.75, 35.15], [127.0, 35.25], [127.53, 35.03], [127.75, 34.5], [127.65, 34.25], [127.75, 34.0], [127.53, 33.47], [127.0, 33.25], [126.75, 33.35], [126.68, 33.32], [126.53, 32.97], [126.0, 32.75], [125.75, 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34.25], [127.75, 34.0], [127.53, 33.47], [127.0, 33.25], [126.75, 33.35], [126.68, 33.32], [126.53, 32.97], [126.0, 32.75], [125.75, 32.85], [125.5, 32.75], [125.25, 32.85], [125.18, 32.82], [125.03, 32.47], [124.5, 32.25], [124.25, 32.35], [124.0, 32.25], [123.47, 32.47], [123.32, 32.82], [123.25, 32.85], [123.0, 32.75], [122.75, 32.85], [122.5, 32.75], [122.25, 32.85], [122.0, 32.75], [121.75, 32.85], [121.5, 32.75], [121.25, 32.85], [121.0, 32.75], [120.75, 32.85], [120.5, 32.75], [119.97, 32.97], [119.75, 33.5], [119.97, 34.03], [120.32, 34.18], [120.47, 34.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.2822128738804395}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9373204235782127}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.6493757275567873, 0.7179244552833666, 1.9574173968771333]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.7393669128417741, -2.7568547566731354, -2.370488230387366]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6559991740681723, -4.653569558554241, -3.5023925381122245]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.38456004887388, -6.2822128738804395, -6.049065082113998]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4991730368477616, -1.9219904352759023, -1.3982664342263964]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8420154487481044, -2.0980494721110143, -1.9236494219371636]}}