{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.828538", "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": "2023-Jan-27_to_2023-Jan-31_120.0_24.0"}, "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": 2023010001251}, "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": "January 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2023"}, "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": 102613.2607201171}, "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": ["Taiwan, Province of 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": ["Philippine Sea", "South 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": 24.0}, "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": 120.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 117.0}, "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": 20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[116.47, 21.53], [116.82, 21.68], [116.97, 22.03], [117.32, 22.18], [117.47, 22.53], [117.82, 22.68], [117.85, 22.75], [117.75, 23.0], [117.97, 23.53], [118.32, 23.68], [118.35, 23.75], [118.25, 24.0], [118.47, 24.53], [118.82, 24.68], [118.85, 24.75], [118.75, 25.0], [118.97, 25.53], [119.5, 25.75], [120.03, 25.53], [120.18, 25.18], [120.5, 25.04], [121.0, 25.25], [121.25, 25.15], [121.5, 25.25], [122.03, 25.03], [122.25, 24.5], [122.04, 24.0], [122.25, 23.5], [122.03, 22.97], [121.5, 22.75], [121.25, 22.85], [121.18, 22.82], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 21.35], [118.68, 21.32], [118.65, 21.25], [118.75, 21.0], [118.53, 20.47], [118.18, 20.32], [118.15, 20.25], [118.25, 20.0], [118.03, 19.47], [117.5, 19.25], [117.25, 19.35], [117.0, 19.25], [116.47, 19.47], [116.25, 20.0], [116.35, 20.25], [116.25, 20.5], [116.35, 20.75], [116.25, 21.0], [116.47, 21.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.25, 20.5], [116.35, 20.75], [116.25, 21.0], [116.47, 21.53], [116.82, 21.68], [116.97, 22.03], [117.32, 22.18], [117.47, 22.53], [117.82, 22.68], [117.85, 22.75], [117.75, 23.0], [117.97, 23.53], [118.32, 23.68], [118.35, 23.75], [118.25, 24.0], [118.47, 24.53], [118.82, 24.68], [118.85, 24.75], [118.75, 25.0], [118.97, 25.53], [119.5, 25.75], [120.03, 25.53], [120.18, 25.18], [120.5, 25.04], [121.0, 25.25], [121.25, 25.15], [121.5, 25.25], [122.03, 25.03], [122.25, 24.5], [122.04, 24.0], [122.25, 23.5], [122.03, 22.97], [121.5, 22.75], [121.25, 22.85], [121.18, 22.82], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 21.35], [118.68, 21.32], [118.65, 21.25], [118.75, 21.0], [118.53, 20.47], [118.18, 20.32], [118.15, 20.25], [118.25, 20.0], [118.03, 19.47], [117.5, 19.25], [117.25, 19.35], [117.0, 19.25], [116.47, 19.47], [116.25, 20.0], [116.35, 20.25], [116.25, 20.5]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.25, 20.5], [116.35, 20.75], [116.25, 21.0], [116.47, 21.53], [116.82, 21.68], [116.97, 22.03], [117.32, 22.18], [117.47, 22.53], [117.82, 22.68], [117.85, 22.75], [117.75, 23.0], [117.97, 23.53], [118.32, 23.68], [118.35, 23.75], [118.25, 24.0], [118.47, 24.53], [118.82, 24.68], [118.85, 24.75], [118.75, 25.0], [118.97, 25.53], [119.5, 25.75], [120.03, 25.53], [120.18, 25.18], [120.5, 25.04], [121.0, 25.25], [121.25, 25.15], [121.5, 25.25], [122.03, 25.03], [122.25, 24.5], [122.04, 24.0], [122.25, 23.5], [122.03, 22.97], [121.5, 22.75], [121.25, 22.85], [121.18, 22.82], [121.03, 22.47], [120.68, 22.32], [120.53, 21.97], [120.0, 21.75], [119.75, 21.85], [119.68, 21.82], [119.53, 21.47], [119.0, 21.25], [118.75, 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anomaly recorded over entire duration", "value": -6.4646510310309395}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.446292442485147}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.200459731333638, 12.999812006414913, 14.96918810958266, 14.441483835804206, 14.310587149455216]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.198251698438469, 1.7401941299060013, 4.035583476469128, 12.690895587124317, 14.310587149455216]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3190241418050213, -4.577436189458014, -2.601739721024586, -2.2708530488839784, -2.4124319229313187]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.879947406262602, -6.4646510310309395, -4.494064829640649, -2.7613211816475314, -2.4124319229313187]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8309772801213582, -2.6351081425457377, -1.4972770322699769, -1.342419874378173, -1.579067038452783]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.014733402576236, -3.4196216394499874, -1.9448588381650356, -1.4067999213348636, -1.579067038452783]}}