{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:53.302255", "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": "2021-Aug-25_to_2021-Aug-30_96.0_30.0"}, "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": 2021080001111}, "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": "August 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 30 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 56277.80944647966}, "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": 30.0}, "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": 96.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "96.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 95.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 98.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[95.25, 31.15], [95.32, 31.18], [95.47, 31.53], [96.0, 31.75], [96.25, 31.65], [96.5, 31.75], [96.75, 31.65], [97.0, 31.75], 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31.75], [97.03, 31.53], [97.25, 31.0], [97.03, 30.47], [96.5, 30.25], [96.25, 30.35], [96.0, 30.25]]]]}, "2021-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 30.5], [94.47, 31.03], [95.0, 31.25], [95.25, 31.15], [95.32, 31.18], [95.47, 31.53], [96.0, 31.75], [96.25, 31.65], [96.5, 31.75], [96.75, 31.65], [97.0, 31.75], [97.53, 31.53], [97.75, 31.0], [97.65, 30.75], [97.75, 30.5], [97.65, 30.25], [97.75, 30.0], [97.65, 29.75], [97.75, 29.5], [97.65, 29.25], [97.68, 29.18], [97.75, 29.15], [98.0, 29.25], [98.53, 29.03], [98.75, 28.5], [98.53, 27.97], [98.0, 27.75], [97.75, 27.85], [97.5, 27.75], [97.25, 27.85], [97.0, 27.75], [96.47, 27.97], [96.25, 28.5], [96.35, 28.75], [96.32, 28.82], [96.25, 28.85], [96.0, 28.75], [95.47, 28.97], [95.32, 29.32], [95.25, 29.35], [95.0, 29.25], [94.47, 29.47], [94.25, 30.0], [94.35, 30.25], [94.25, 30.5]]]]}, "2021-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 30.5], [94.47, 31.03], [95.0, 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"MultiPolygon", "coordinates": [[[[95.0, 29.25], [94.47, 29.47], [94.25, 30.0], [94.47, 30.53], [95.0, 30.75], [95.5, 30.54], [96.0, 30.75], [96.25, 30.65], [96.5, 30.75], [97.03, 30.53], [97.25, 30.0], [97.15, 29.75], [97.25, 29.5], [97.03, 28.97], [96.5, 28.75], [96.25, 28.85], [96.0, 28.75], [95.47, 28.97], [95.3, 29.38], [95.0, 29.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.881004139815616}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.525247482280213}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.205051383450041, 3.4287539677573022, 4.49213361810331, 3.920498824574622, 4.9511466086618725, 4.960305534978602]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.9897297572084085, 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anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4403807024845001, -4.06785237313891, -2.8955480962518605, -3.4359440951735394, -2.407288099985374, -1.8042466664174044]}}