{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:47.349112", "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-13_to_2021-Aug-17_121.0_31.0"}, "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": 2021080000684}, "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 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 17 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61334.614543820026}, "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": ["East China Sea"]}, "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": 31.0}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 116.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[117.25, 28.85], [117.0, 28.75], [116.75, 28.85], [116.5, 28.75], [115.97, 28.97], [115.75, 29.5], [115.97, 30.03], [116.5, 30.25], [116.75, 30.15], [117.0, 30.25], [117.25, 30.15], [117.32, 30.18], [117.46, 30.5], [117.25, 31.0], [117.47, 31.53], [118.0, 31.75], [118.25, 31.65], [118.5, 31.75], [119.03, 31.53], [119.18, 31.18], [119.25, 31.15], [119.32, 31.18], [119.35, 31.25], [119.25, 31.5], [119.47, 32.03], [120.0, 32.25], [120.25, 32.15], [120.5, 32.25], [120.75, 32.15], [121.0, 32.25], [121.53, 32.03], [121.68, 31.68], [122.03, 31.53], [122.25, 31.0], [122.03, 30.47], [121.5, 30.25], [121.25, 30.35], [121.18, 30.32], [121.15, 30.25], [121.25, 30.0], [121.03, 29.47], [120.5, 29.25], [120.25, 29.35], [120.0, 29.25], [119.75, 29.35], [119.5, 29.25], [119.25, 29.35], [119.0, 29.25], [118.75, 29.35], [118.68, 29.32], [118.65, 29.25], [118.75, 29.0], [118.53, 28.47], [118.0, 28.25], [117.47, 28.47], [117.32, 28.82], [117.25, 28.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.5, 28.75], [115.97, 28.97], [115.75, 29.5], [115.97, 30.03], [116.5, 30.25], [116.75, 30.15], [117.0, 30.25], [117.25, 30.15], [117.32, 30.18], [117.46, 30.5], [117.25, 31.0], [117.47, 31.53], [118.0, 31.75], [118.25, 31.65], [118.5, 31.75], [119.03, 31.53], [119.18, 31.18], [119.25, 31.15], [119.32, 31.18], [119.35, 31.25], [119.25, 31.5], [119.47, 32.03], [120.0, 32.25], [120.25, 32.15], [120.5, 32.25], [120.75, 32.15], [121.0, 32.25], [121.53, 32.03], [121.68, 31.68], [122.03, 31.53], [122.25, 31.0], [122.03, 30.47], [121.5, 30.25], [121.25, 30.35], [121.18, 30.32], [121.03, 29.97], [120.68, 29.82], [120.53, 29.47], [120.0, 29.25], [119.75, 29.35], [119.5, 29.25], [119.25, 29.35], [119.0, 29.25], [118.75, 29.35], [118.68, 29.32], [118.53, 28.97], [118.0, 28.75], [117.75, 28.85], [117.5, 28.75], [117.25, 28.85], [117.0, 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"Maximum t2m anomaly recorded over entire duration", "value": -5.673217316854561}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9118795755284856}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.672621271678224, 23.604496434354814, 24.732167559917798, 25.779281058426307, 25.02612108438376]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.163147014055482, 21.468734216805785, 22.99138571680828, 25.319163297619127, 25.02612108438376]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7084606137889, -4.764918870073611, -3.552991995635214, -3.014712849466897, -3.098355417498283]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.085116092727105, -5.673217316854561, -4.5934712942225815, -3.4029307002587643, -3.098355417498283]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.441991812895377, -1.9028086560519868, -1.4498236427949889, -1.2944328114914219, -1.4536842123355138]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.876675059764244, -2.1799630111206545, -1.7696932573319335, -1.339225380058786, -1.4536842123355138]}}