{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:50.535827", "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": "2024-Sep-03_to_2024-Sep-05_94.5_41.0"}, "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": 2024090000141}, "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": "September 03 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 2024"}, "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": 68068.04184731172}, "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"]}, "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": 41.0}, "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": 94.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "94.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 92.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 97.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[93.25, 40.65], [93.32, 40.68], [93.35, 40.75], [93.25, 41.0], [93.35, 41.25], [93.25, 41.5], [93.47, 42.03], [93.88, 42.2], [93.75, 42.5], [93.97, 43.03], [94.5, 43.25], [94.75, 43.15], [95.0, 43.25], [95.53, 43.03], [95.75, 42.5], [95.65, 42.25], [95.68, 42.18], [96.03, 42.03], [96.18, 41.68], [96.53, 41.53], [96.75, 41.0], [96.63, 40.7], [96.75, 40.65], [97.0, 40.75], [97.53, 40.53], [97.75, 40.0], [97.53, 39.47], [97.0, 39.25], [96.75, 39.35], [96.5, 39.25], [96.25, 39.35], [96.0, 39.25], [95.75, 39.35], [95.5, 39.25], [95.25, 39.35], [95.18, 39.32], [95.03, 38.97], [94.5, 38.75], [94.25, 38.85], [94.0, 38.75], [93.75, 38.85], [93.5, 38.75], [93.25, 38.85], [93.0, 38.75], [92.75, 38.85], [92.5, 38.75], [91.97, 38.97], [91.75, 39.5], [91.97, 40.03], [92.32, 40.18], [92.47, 40.53], [93.0, 40.75], [93.25, 40.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 40.53], [93.0, 40.75], [93.25, 40.65], [93.32, 40.68], [93.35, 40.75], [93.25, 41.0], [93.35, 41.25], [93.25, 41.5], [93.47, 42.03], [93.88, 42.2], [93.75, 42.5], [93.97, 43.03], [94.5, 43.25], [94.75, 43.15], [95.0, 43.25], [95.53, 43.03], [95.75, 42.5], [95.65, 42.25], [95.68, 42.18], [96.03, 42.03], [96.18, 41.68], [96.53, 41.53], [96.75, 41.0], [96.63, 40.7], [96.75, 40.65], [97.0, 40.75], [97.53, 40.53], [97.75, 40.0], [97.53, 39.47], [97.0, 39.25], [96.75, 39.35], [96.5, 39.25], [96.25, 39.35], [96.0, 39.25], [95.75, 39.35], [95.5, 39.25], [95.25, 39.35], [95.18, 39.32], [95.03, 38.97], [94.5, 38.75], [94.25, 38.85], [94.0, 38.75], [93.75, 38.85], [93.5, 38.75], [93.25, 38.85], [93.0, 38.75], [92.75, 38.85], [92.5, 38.75], [91.97, 38.97], [91.75, 39.5], [91.97, 40.03], [92.32, 40.18], [92.47, 40.53]]]]}, "2024-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 40.53], [93.0, 40.75], [93.25, 40.65], [93.32, 40.68], [93.35, 40.75], [93.25, 41.0], [93.35, 41.25], [93.25, 41.5], [93.47, 42.03], [93.88, 42.2], [93.75, 42.5], [93.97, 43.03], [94.5, 43.25], [94.75, 43.15], [95.0, 43.25], [95.53, 43.03], [95.75, 42.5], [95.65, 42.25], [95.68, 42.18], [96.03, 42.03], [96.18, 41.68], [96.53, 41.53], [96.75, 41.0], [96.63, 40.7], [96.75, 40.65], [97.0, 40.75], [97.53, 40.53], [97.75, 40.0], [97.53, 39.47], [97.0, 39.25], [96.75, 39.35], [96.5, 39.25], [96.25, 39.35], [96.0, 39.25], [95.75, 39.35], [95.5, 39.25], [95.25, 39.35], [95.18, 39.32], [95.03, 38.97], [94.5, 38.75], [94.25, 38.85], [94.0, 38.75], [93.75, 38.85], [93.5, 38.75], [93.25, 38.85], [93.0, 38.75], [92.75, 38.85], [92.5, 38.75], [91.97, 38.97], [91.75, 39.5], [91.97, 40.03], [92.32, 40.18], [92.47, 40.53]]]]}, "2024-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.47, 40.53], [93.0, 40.75], [93.25, 40.65], [93.32, 40.68], [93.35, 40.75], [93.25, 41.0], [93.35, 41.25], [93.25, 41.5], [93.47, 42.03], [93.88, 42.2], [93.75, 42.5], [93.97, 43.03], [94.5, 43.25], [94.75, 43.15], [95.0, 43.25], [95.53, 43.03], [95.75, 42.5], [95.65, 42.25], [95.68, 42.18], [96.03, 42.03], [96.18, 41.68], [96.53, 41.53], [96.75, 41.0], [96.63, 40.7], [96.75, 40.65], [97.0, 40.75], [97.53, 40.53], [97.75, 40.0], [97.53, 39.47], [97.0, 39.25], [96.75, 39.35], [96.5, 39.25], [96.25, 39.35], [96.0, 39.25], [95.75, 39.35], [95.5, 39.25], [95.25, 39.35], [95.18, 39.32], [95.03, 38.97], [94.5, 38.75], [94.25, 38.85], [94.0, 38.75], [93.75, 38.85], [93.5, 38.75], [93.25, 38.85], [93.0, 38.75], [92.75, 38.85], [92.5, 38.75], [91.97, 38.97], [91.75, 39.5], [91.97, 40.03], [92.32, 40.18], [92.47, 40.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.059328229674406}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.017562944936119}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.82138578042219, 12.286984972022026, 12.707656807735077]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.010569508870446, 7.65369822184249, 7.381745910644554]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.132378891379127, -6.316463093389963, -5.603846850039266]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.059328229674406, -7.8957932674600215, -6.96312528589749]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9499572672381138, -2.007246907905225, -1.7717469894924067]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4409662454844634, -2.2789981663689214, -2.213940851939475]}}