{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:14.187880", "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-06_to_2023-Jan-08_102.0_23.0"}, "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": 2023010000396}, "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 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 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": 74530.64100541906}, "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", "Lao People's Democratic Republic", "Myanmar", "Viet Nam"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "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": 23.0}, "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": 102.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 100.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.5}, "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": 24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[99.75, 22.0], [99.97, 22.53], [100.32, 22.68], [100.35, 22.75], [100.25, 23.0], [100.47, 23.53], [100.82, 23.68], [100.85, 23.75], [100.75, 24.0], [100.97, 24.53], [101.5, 24.75], [101.75, 24.65], [102.0, 24.75], [102.53, 24.53], [102.75, 24.0], [102.65, 23.75], [102.75, 23.5], [102.65, 23.25], [102.68, 23.18], [103.03, 23.03], [103.25, 22.5], [103.03, 21.97], [102.68, 21.82], [102.54, 21.5], [102.75, 21.0], [102.65, 20.75], [102.75, 20.5], [102.53, 19.97], [102.18, 19.82], [102.03, 19.47], [101.5, 19.25], [101.25, 19.35], [101.0, 19.25], [100.47, 19.47], [100.25, 20.0], [100.35, 20.25], [100.32, 20.32], [99.97, 20.47], [99.75, 21.0], [99.85, 21.25], [99.75, 21.5], [99.85, 21.75], [99.75, 22.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.Asia", "S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 21.5], [99.85, 21.75], [99.75, 22.0], [99.97, 22.53], [100.32, 22.68], [100.35, 22.75], [100.25, 23.0], [100.47, 23.53], [100.82, 23.68], [100.85, 23.75], [100.75, 24.0], [100.97, 24.53], [101.5, 24.75], [101.75, 24.65], [102.0, 24.75], [102.53, 24.53], [102.75, 24.0], [102.65, 23.75], [102.75, 23.5], [102.65, 23.25], [102.68, 23.18], [103.03, 23.03], [103.25, 22.5], [103.03, 21.97], [102.68, 21.82], [102.54, 21.5], [102.75, 21.0], [102.65, 20.75], [102.75, 20.5], [102.53, 19.97], [102.18, 19.82], [102.03, 19.47], [101.5, 19.25], [101.25, 19.35], [101.0, 19.25], [100.47, 19.47], [100.25, 20.0], [100.35, 20.25], [100.32, 20.32], [99.97, 20.47], [99.75, 21.0], [99.85, 21.25], [99.75, 21.5]]]]}, "2023-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 21.5], [99.85, 21.75], [99.75, 22.0], [99.97, 22.53], [100.32, 22.68], [100.35, 22.75], [100.25, 23.0], [100.47, 23.53], [100.82, 23.68], [100.85, 23.75], [100.75, 24.0], [100.97, 24.53], [101.5, 24.75], [101.75, 24.65], [102.0, 24.75], [102.53, 24.53], [102.75, 24.0], [102.65, 23.75], [102.75, 23.5], [102.65, 23.25], [102.68, 23.18], [103.03, 23.03], [103.25, 22.5], [103.03, 21.97], [102.68, 21.82], [102.54, 21.5], [102.75, 21.0], [102.65, 20.75], [102.75, 20.5], [102.53, 19.97], [102.18, 19.82], [102.03, 19.47], [101.5, 19.25], [101.25, 19.35], [101.0, 19.25], [100.47, 19.47], [100.25, 20.0], [100.35, 20.25], [100.32, 20.32], [99.97, 20.47], [99.75, 21.0], [99.85, 21.25], [99.75, 21.5]]]]}, "2023-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 21.5], [99.85, 21.75], [99.75, 22.0], [99.97, 22.53], [100.32, 22.68], [100.35, 22.75], [100.25, 23.0], [100.47, 23.53], [100.82, 23.68], [100.85, 23.75], [100.75, 24.0], [100.97, 24.53], [101.5, 24.75], [101.75, 24.65], [102.0, 24.75], [102.53, 24.53], [102.75, 24.0], [102.65, 23.75], [102.75, 23.5], [102.65, 23.25], [102.68, 23.18], [103.03, 23.03], [103.25, 22.5], [103.03, 21.97], [102.68, 21.82], [102.54, 21.5], [102.75, 21.0], [102.65, 20.75], [102.75, 20.5], [102.53, 19.97], [102.18, 19.82], [102.03, 19.47], [101.5, 19.25], [101.25, 19.35], [101.0, 19.25], [100.47, 19.47], [100.25, 20.0], [100.35, 20.25], [100.32, 20.32], [99.97, 20.47], [99.75, 21.0], [99.85, 21.25], [99.75, 21.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.826272181511797}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.775556174249105}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.978287676306593, 12.476483191877549, 12.963113051215771]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.673248251715961, 8.995035641617392, 9.863872052393106]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.641925370917704, -3.1073376501844665, -2.5774055016451447]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6413415360406702, -3.826272181511797, -3.0665347496188815]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7794924886614478, -2.0345866874640732, -1.609828322463728]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6534188408256214, -2.56724858864995, -1.956544944506446]}}