{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:10.010256", "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-Oct-09_to_2021-Oct-12_107.0_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": 2021100000356}, "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": "October 09 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 12 2021"}, "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": 151915.20521252992}, "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": 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": 107.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "107.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 105.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 111.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[107.53, 32.47], [107.0, 32.25], [106.75, 32.35], [106.5, 32.25], [106.25, 32.35], [106.0, 32.25], [105.75, 32.35], 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"description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.75, 33.5], [104.85, 33.75], [104.75, 34.0], [104.97, 34.53], [105.32, 34.68], [105.47, 35.03], [105.82, 35.18], [105.85, 35.25], [105.75, 35.5], [105.85, 35.75], [105.75, 36.0], [105.97, 36.53], [106.32, 36.68], [106.47, 37.03], [107.0, 37.25], [107.25, 37.15], [107.5, 37.25], [107.75, 37.15], [108.0, 37.25], [108.25, 37.15], [108.5, 37.25], [108.75, 37.15], [109.0, 37.25], [109.25, 37.15], [109.5, 37.25], [109.75, 37.15], [110.0, 37.25], [110.53, 37.03], [110.68, 36.68], [110.75, 36.65], [111.0, 36.75], [111.53, 36.53], [111.75, 36.0], [111.54, 35.5], [111.75, 35.0], [111.53, 34.47], [111.0, 34.25], [110.75, 34.35], [110.68, 34.32], [110.53, 33.97], [110.0, 33.75], [109.75, 33.85], [109.68, 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anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8149203224183594, -2.6346670820677187, -1.970920197574041, -1.461857463803959]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4626488780637694, -3.3683074526804, -2.632535881452519, -1.7138250155073573]}}