{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:27:34.155842", "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-11_to_2021-Oct-14_112.5_24.5"}, "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": 2021100000369}, "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 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 14 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": 53382.35998963976}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 24.5}, "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": 112.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 25.0], [109.88, 25.3], [109.47, 25.47], [109.25, 26.0], [109.47, 26.53], [110.0, 26.75], [110.25, 26.65], [110.5, 26.75], [111.03, 26.53], [111.18, 26.18], [111.53, 26.03], [111.68, 25.68], [111.75, 25.65], [112.0, 25.75], [112.25, 25.65], [112.5, 25.75], [113.03, 25.53], [113.25, 25.0], [113.15, 24.75], [113.25, 24.5], [113.03, 23.97], [112.5, 23.75], [112.25, 23.85], [112.18, 23.82], [112.03, 23.47], [111.68, 23.32], [111.53, 22.97], [111.0, 22.75], [110.47, 22.97], [110.32, 23.32], [110.25, 23.35], [110.0, 23.25], [109.47, 23.47], [109.25, 24.0], [109.47, 24.53], [109.82, 24.68], [109.85, 24.75], [109.75, 25.0]]]]}, "2021-10-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.82, 24.68], [109.85, 24.75], [109.75, 25.0], [109.88, 25.3], [109.47, 25.47], [109.25, 26.0], [109.47, 26.53], [110.0, 26.75], [110.25, 26.65], [110.5, 26.75], [111.03, 26.53], [111.18, 26.18], [111.53, 26.03], [111.68, 25.68], [111.75, 25.65], [112.0, 25.75], [112.25, 25.65], [112.5, 25.75], [113.03, 25.53], [113.25, 25.0], [113.15, 24.75], [113.25, 24.5], [113.03, 23.97], [112.5, 23.75], [112.25, 23.85], [112.18, 23.82], [112.03, 23.47], [111.68, 23.32], [111.53, 22.97], [111.0, 22.75], [110.47, 22.97], [110.32, 23.32], [110.25, 23.35], [110.18, 23.32], [110.03, 22.97], [109.5, 22.75], [108.97, 22.97], [108.75, 23.5], [108.97, 24.03], [109.32, 24.18], [109.47, 24.53], [109.82, 24.68]]]]}, "2021-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.82, 24.68], [109.85, 24.75], [109.75, 25.0], [109.88, 25.3], [109.47, 25.47], [109.25, 26.0], [109.47, 26.53], [110.0, 26.75], [110.25, 26.65], [110.5, 26.75], [111.03, 26.53], [111.18, 26.18], [111.53, 26.03], [111.68, 25.68], [111.75, 25.65], [112.0, 25.75], [112.25, 25.65], [112.5, 25.75], [113.03, 25.53], [113.25, 25.0], [113.15, 24.75], [113.25, 24.5], [113.03, 23.97], [112.5, 23.75], [112.25, 23.85], [112.18, 23.82], [112.03, 23.47], [111.68, 23.32], [111.53, 22.97], [111.0, 22.75], [110.47, 22.97], [110.32, 23.32], [110.25, 23.35], [110.18, 23.32], [110.03, 22.97], [109.5, 22.75], [108.97, 22.97], [108.75, 23.5], [108.97, 24.03], [109.32, 24.18], [109.47, 24.53], [109.82, 24.68]]]]}, "2021-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.5, 24.25], [110.03, 24.03], [110.25, 23.5], [110.03, 22.97], [109.5, 22.75], [108.97, 22.97], [108.75, 23.5], [108.97, 24.03], [109.5, 24.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.012117170303384}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.032854595653617}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.56672488484162, 17.431053002683313, 17.1954792751863, 20.312551628670292]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.16395452632878, 13.354559665231534, 13.333690360449111, 20.312551628670292]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.544780924046829, -3.7238564278598005, -3.872852210321098, -3.7291911939761917]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.012117170303384, -4.338086485854092, -4.258736631418515, -3.7291911939761917]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7767295679274926, -1.487268097094806, -1.5525998633011615, -1.4514254642321223]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0836131165484866, -1.7010790827993414, -1.6963128593046415, -1.4514254642321223]}}