{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:53.448503", "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-Aug-25_to_2023-Aug-27_111.0_38.5"}, "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": 2023080000677}, "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 25 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 27 2023"}, "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": 58105.24380053538}, "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": 38.5}, "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": 111.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[106.75, 38.0], [106.97, 38.53], [107.5, 38.75], [107.75, 38.65], [107.82, 38.68], [107.97, 39.03], [108.5, 39.25], [108.75, 39.15], [108.82, 39.18], [108.97, 39.53], [109.5, 39.75], [109.75, 39.65], [110.0, 39.75], [110.25, 39.65], [110.5, 39.75], [110.75, 39.65], [110.82, 39.68], [110.97, 40.03], [111.5, 40.25], [111.75, 40.15], [112.0, 40.25], [112.53, 40.03], [112.75, 39.5], [112.65, 39.25], [112.75, 39.0], [112.65, 38.75], [112.75, 38.5], [112.53, 37.97], [112.0, 37.75], [111.75, 37.85], [111.5, 37.75], [111.25, 37.85], [111.18, 37.82], [111.03, 37.47], [110.5, 37.25], [110.25, 37.35], [110.0, 37.25], [109.47, 37.47], [109.32, 37.82], [109.25, 37.85], [109.13, 37.8], [109.25, 37.5], [109.03, 36.97], [108.5, 36.75], [108.25, 36.85], [108.18, 36.82], [108.03, 36.47], [107.5, 36.25], [106.97, 36.47], [106.75, 37.0], [106.85, 37.25], [106.75, 37.5], [106.85, 37.75], [106.75, 38.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "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": {"2023-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.75, 37.5], [106.85, 37.75], [106.75, 38.0], [106.97, 38.53], [107.5, 38.75], [107.75, 38.65], [107.82, 38.68], [107.97, 39.03], [108.5, 39.25], [108.75, 39.15], [108.82, 39.18], [108.97, 39.53], [109.5, 39.75], [109.75, 39.65], [110.0, 39.75], [110.25, 39.65], [110.5, 39.75], [110.75, 39.65], [110.82, 39.68], [110.97, 40.03], [111.5, 40.25], [111.75, 40.15], [112.0, 40.25], [112.53, 40.03], [112.75, 39.5], [112.65, 39.25], [112.75, 39.0], [112.65, 38.75], [112.75, 38.5], [112.53, 37.97], [112.0, 37.75], [111.75, 37.85], [111.5, 37.75], [111.25, 37.85], [111.18, 37.82], [111.03, 37.47], [110.5, 37.25], [110.25, 37.35], [110.0, 37.25], [109.47, 37.47], [109.32, 37.82], [109.25, 37.85], [109.13, 37.8], [109.25, 37.5], [109.03, 36.97], [108.5, 36.75], [108.25, 36.85], [108.18, 36.82], [108.03, 36.47], [107.5, 36.25], [106.97, 36.47], [106.75, 37.0], [106.85, 37.25], [106.75, 37.5]]]]}, "2023-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.75, 37.5], [106.85, 37.75], [106.75, 38.0], [106.97, 38.53], [107.5, 38.75], [107.75, 38.65], [107.82, 38.68], [107.97, 39.03], [108.5, 39.25], [108.75, 39.15], [108.82, 39.18], [108.97, 39.53], [109.5, 39.75], [109.75, 39.65], [110.0, 39.75], [110.25, 39.65], [110.5, 39.75], [110.75, 39.65], [110.82, 39.68], [110.97, 40.03], [111.5, 40.25], [111.75, 40.15], [112.0, 40.25], [112.53, 40.03], [112.75, 39.5], [112.65, 39.25], [112.75, 39.0], [112.65, 38.75], [112.75, 38.5], [112.53, 37.97], [112.0, 37.75], [111.75, 37.85], [111.5, 37.75], [111.25, 37.85], [111.18, 37.82], [111.03, 37.47], [110.5, 37.25], [110.25, 37.35], [110.0, 37.25], [109.47, 37.47], [109.32, 37.82], [109.25, 37.85], [109.13, 37.8], [109.25, 37.5], [109.03, 36.97], [108.5, 36.75], [108.25, 36.85], [108.18, 36.82], [108.03, 36.47], [107.5, 36.25], [106.97, 36.47], [106.75, 37.0], [106.85, 37.25], [106.75, 37.5]]]]}, "2023-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.75, 37.5], [106.85, 37.75], [106.75, 38.0], [106.97, 38.53], [107.5, 38.75], [107.75, 38.65], [107.82, 38.68], [107.97, 39.03], [108.5, 39.25], [108.75, 39.15], [108.82, 39.18], [108.97, 39.53], [109.5, 39.75], [109.75, 39.65], [110.0, 39.75], [110.25, 39.65], [110.5, 39.75], [110.75, 39.65], [110.82, 39.68], [110.97, 40.03], [111.5, 40.25], [111.75, 40.15], [112.0, 40.25], [112.53, 40.03], [112.75, 39.5], [112.65, 39.25], [112.75, 39.0], [112.65, 38.75], [112.75, 38.5], [112.53, 37.97], [112.0, 37.75], [111.75, 37.85], [111.5, 37.75], [111.25, 37.85], [111.18, 37.82], [111.03, 37.47], [110.5, 37.25], [110.25, 37.35], [110.0, 37.25], [109.47, 37.47], [109.32, 37.82], [109.25, 37.85], [109.13, 37.8], [109.25, 37.5], [109.03, 36.97], [108.5, 36.75], [108.25, 36.85], [108.18, 36.82], [108.03, 36.47], [107.5, 36.25], [106.97, 36.47], [106.75, 37.0], [106.85, 37.25], [106.75, 37.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.657753701650847}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.290256070433658}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.15557387659095, 14.49169549466717, 15.141234874301233]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.339283170780561, 11.726673260659481, 11.569159474248579]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.175228619029331, -4.737293987437108, -3.9582456048345356]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.657753701650847, -5.3684579177264595, -4.939984687924607]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.709729982972921, -1.912980524031324, -1.551531744792549]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1832063251706084, -2.207987812626212, -2.135070429799736]}}