{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:09.841302", "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-08_to_2021-Oct-10_99.0_41.5"}, "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": 2021100000334}, "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 08 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 10 2021"}, "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": 76424.21053008742}, "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", "Mongolia"]}, "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": []}, "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": 41.5}, "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": 98.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 103.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.0}, "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": [[[[97.97, 42.03], [98.5, 42.25], [98.75, 42.15], [98.82, 42.18], [98.85, 42.25], [98.75, 42.5], [98.97, 43.03], [99.5, 43.25], [99.75, 43.15], [100.0, 43.25], [100.25, 43.15], [100.5, 43.25], [100.75, 43.15], [101.0, 43.25], [101.25, 43.15], [101.5, 43.25], [101.75, 43.15], [102.0, 43.25], [102.25, 43.15], [102.5, 43.25], [102.75, 43.15], [103.0, 43.25], [103.53, 43.03], [103.75, 42.5], [103.53, 41.97], [103.18, 41.82], [103.15, 41.75], [103.25, 41.5], [103.03, 40.97], [102.5, 40.75], [101.97, 40.97], [101.82, 41.32], [101.75, 41.35], [101.68, 41.32], [101.65, 41.25], [101.75, 41.0], [101.63, 40.7], [102.03, 40.53], [102.25, 40.0], [102.03, 39.47], [101.5, 39.25], [101.25, 39.35], [101.0, 39.25], [100.75, 39.35], [100.5, 39.25], [100.0, 39.46], [99.5, 39.25], [99.25, 39.35], [99.0, 39.25], [98.75, 39.35], [98.5, 39.25], [97.97, 39.47], [97.75, 40.0], [97.97, 40.53], [98.5, 40.75], [97.97, 40.97], [97.75, 41.5], [97.97, 42.03]], [[98.75, 40.65], [98.82, 40.68], [98.88, 40.8], [98.75, 40.85], [98.5, 40.75], [98.75, 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": {"2021-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.97, 40.97], [97.75, 41.5], [97.97, 42.03], [98.5, 42.25], [98.75, 42.15], [98.82, 42.18], [98.85, 42.25], [98.75, 42.5], [98.97, 43.03], [99.5, 43.25], [99.75, 43.15], [100.0, 43.25], [100.25, 43.15], [100.5, 43.25], [100.75, 43.15], [101.0, 43.25], [101.25, 43.15], [101.5, 43.25], [101.75, 43.15], [102.0, 43.25], [102.25, 43.15], [102.5, 43.25], [102.75, 43.15], [103.0, 43.25], [103.53, 43.03], [103.75, 42.5], [103.53, 41.97], [103.18, 41.82], [103.15, 41.75], [103.25, 41.5], [103.03, 40.97], [102.5, 40.75], [101.97, 40.97], [101.82, 41.32], [101.75, 41.35], [101.68, 41.32], [101.65, 41.25], [101.75, 41.0], [101.63, 40.7], [102.03, 40.53], [102.25, 40.0], [102.03, 39.47], [101.5, 39.25], [101.25, 39.35], [101.0, 39.25], [100.75, 39.35], [100.5, 39.25], [100.0, 39.46], [99.5, 39.25], [99.25, 39.35], [99.0, 39.25], [98.75, 39.35], [98.5, 39.25], [97.97, 39.47], [97.75, 40.0], [97.97, 40.53], [98.5, 40.75], [97.97, 40.97]], [[98.75, 40.65], [98.82, 40.68], [98.88, 40.8], [98.75, 40.85], [98.5, 40.75], [98.75, 40.65]]]]}, "2021-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.97, 40.97], [97.75, 41.5], [97.97, 42.03], [98.5, 42.25], [98.75, 42.15], [98.82, 42.18], [98.85, 42.25], [98.75, 42.5], [98.97, 43.03], [99.5, 43.25], [99.75, 43.15], [100.0, 43.25], [100.25, 43.15], [100.5, 43.25], [100.75, 43.15], [101.0, 43.25], [101.25, 43.15], [101.5, 43.25], [101.75, 43.15], [102.0, 43.25], [102.25, 43.15], [102.5, 43.25], [102.75, 43.15], [103.0, 43.25], [103.53, 43.03], [103.75, 42.5], [103.53, 41.97], [103.18, 41.82], [103.15, 41.75], [103.25, 41.5], [103.03, 40.97], [102.5, 40.75], [101.97, 40.97], [101.82, 41.32], [101.75, 41.35], [101.68, 41.32], [101.65, 41.25], [101.75, 41.0], [101.63, 40.7], 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"Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.4832208740501187, 1.9767201745048624, 3.399524581780554]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.522183060959332, -8.043646750883404, -5.3367643147934825]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.734844833860222, -9.461797254927376, -6.288885919152619]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.212410540475853, -2.3578112525574224, -1.5427946063644578]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1780464287461734, -3.1033472580914476, -1.8672236911296194]}}