{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:30:54.501441", "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": "2022-May-09_to_2022-May-12_99.0_46.5"}, "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": 2022050000397}, "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": "May 09 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2022"}, "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": 56442.49487784687}, "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": ["Mongolia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.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": 46.5}, "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": 99.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "99.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 98.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 103.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.97, 47.03], [98.5, 47.25], [98.75, 47.15], [99.0, 47.25], 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[97.85, 46.25], [97.75, 46.5], [97.97, 47.03]]]]}, "2022-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.97, 47.03], [98.5, 47.25], [98.75, 47.15], [99.0, 47.25], [99.53, 47.03], [99.68, 46.68], [99.75, 46.65], [100.0, 46.75], [100.25, 46.65], [100.5, 46.75], [100.75, 46.65], [101.0, 46.75], [101.5, 46.54], [102.0, 46.75], [102.53, 46.53], [102.68, 46.18], [103.03, 46.03], [103.25, 45.5], [103.15, 45.25], [103.18, 45.18], [103.53, 45.03], [103.75, 44.5], [103.53, 43.97], [103.0, 43.75], [102.75, 43.85], [102.5, 43.75], [102.25, 43.85], [102.0, 43.75], [101.75, 43.85], [101.5, 43.75], [101.25, 43.85], [101.0, 43.75], [100.75, 43.85], [100.5, 43.75], [99.97, 43.97], [99.75, 44.5], [99.85, 44.75], [99.82, 44.82], [99.47, 44.97], [99.32, 45.32], [99.25, 45.35], [99.0, 45.25], [98.75, 45.35], [98.5, 45.25], [97.97, 45.47], [97.75, 46.0], [97.85, 46.25], [97.75, 46.5], [97.97, 47.03]]]]}, "2022-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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"description": "Mean t2m anomaly over entire duration", "value": -7.222451593813895}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.5785331349472926, 4.680260543168572, 4.640552678225106, 3.2452315277078583]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.28464689205043214, -0.3793562673988049, 0.16295331103793842, -2.1663832088746062]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.243360656631315, -6.56574039342733, -6.785500099824475, -8.429086319403261]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.544776210847829, -8.42678184041904, -7.664351242515352, -10.088826499889478]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m 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