{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:51.363791", "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": "2022-Sep-10_to_2022-Sep-13_102.0_22.5"}, "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": 2022090000455}, "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": "September 10 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 2022"}, "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": 62345.07686473865}, "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", "Viet Nam"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 22.5}, "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": 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": 22.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[103.03, 24.03], [103.25, 23.5], [103.15, 23.25], [103.25, 23.0], [103.04, 22.5], [103.25, 22.0], [103.03, 21.47], [102.5, 21.25], [102.25, 21.35], [102.0, 21.25], [101.47, 21.47], [101.32, 21.82], [100.97, 21.97], [100.82, 22.32], [100.75, 22.35], [100.5, 22.25], [99.97, 22.47], [99.75, 23.0], [99.85, 23.25], [99.75, 23.5], [99.97, 24.03], [100.32, 24.18], [100.35, 24.25], [100.25, 24.5], [100.47, 25.03], [101.0, 25.25], [101.25, 25.15], [101.32, 25.18], [101.35, 25.25], [101.25, 25.5], [101.47, 26.03], [102.0, 26.25], [102.53, 26.03], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.75, 24.5], [102.65, 24.25], [102.68, 24.18], [103.03, 24.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 23.5], [99.97, 24.03], [100.32, 24.18], [100.35, 24.25], [100.25, 24.5], [100.47, 25.03], [101.0, 25.25], [101.25, 25.15], [101.32, 25.18], [101.35, 25.25], [101.25, 25.5], [101.47, 26.03], [102.0, 26.25], [102.53, 26.03], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.75, 24.5], [102.65, 24.25], [102.68, 24.18], [103.03, 24.03], [103.25, 23.5], [103.15, 23.25], [103.25, 23.0], [103.03, 22.47], [102.68, 22.32], [102.53, 21.97], [102.0, 21.75], [101.75, 21.85], [101.5, 21.75], [100.97, 21.97], [100.82, 22.32], [100.75, 22.35], [100.5, 22.25], [99.97, 22.47], [99.75, 23.0], [99.85, 23.25], [99.75, 23.5]]]]}, "2022-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 23.5], [99.97, 24.03], [100.32, 24.18], [100.35, 24.25], [100.25, 24.5], [100.47, 25.03], [101.0, 25.25], [101.25, 25.15], [101.32, 25.18], [101.35, 25.25], [101.25, 25.5], [101.47, 26.03], [102.0, 26.25], [102.53, 26.03], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.75, 24.5], [102.65, 24.25], [102.68, 24.18], [103.03, 24.03], [103.25, 23.5], [103.15, 23.25], [103.25, 23.0], [103.04, 22.5], [103.25, 22.0], [103.03, 21.47], [102.5, 21.25], [102.25, 21.35], [102.0, 21.25], [101.47, 21.47], [101.32, 21.82], [100.97, 21.97], [100.82, 22.32], [100.75, 22.35], [100.5, 22.25], [99.97, 22.47], [99.75, 23.0], [99.85, 23.25], [99.75, 23.5]]]]}, "2022-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.75, 23.5], [99.97, 24.03], [100.32, 24.18], [100.35, 24.25], [100.25, 24.5], [100.47, 25.03], [101.0, 25.25], [101.25, 25.15], [101.32, 25.18], [101.35, 25.25], [101.25, 25.5], [101.47, 26.03], [102.0, 26.25], [102.53, 26.03], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.75, 24.5], [102.65, 24.25], [102.68, 24.18], [103.03, 24.03], [103.25, 23.5], [103.15, 23.25], [103.25, 23.0], [103.04, 22.5], [103.25, 22.0], [103.03, 21.47], [102.5, 21.25], [102.25, 21.35], [102.0, 21.25], [101.47, 21.47], [101.32, 21.82], [100.97, 21.97], [100.82, 22.32], [100.75, 22.35], [100.5, 22.25], [99.97, 22.47], [99.75, 23.0], [99.85, 23.25], [99.75, 23.5]]]]}, "2022-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.75, 23.0], [100.85, 23.25], [100.75, 23.5], [100.97, 24.03], [101.32, 24.18], [101.47, 24.53], [102.0, 24.75], [102.53, 24.53], [102.68, 24.18], [103.03, 24.03], [103.25, 23.5], [103.15, 23.25], [103.25, 23.0], [103.04, 22.5], [103.25, 22.0], [103.03, 21.47], [102.5, 21.25], [102.25, 21.35], [102.0, 21.25], [101.47, 21.47], [101.32, 21.82], [100.97, 21.97], [100.75, 22.5], [100.85, 22.75], [100.75, 23.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.6636291274026576}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8245795621773262}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.877238580454048, 19.996576903110167, 19.89851979387697, 20.662522741588873]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.489313124680905, 16.18981212215698, 16.522790608605362, 19.613007332030406]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7930778420002838, -1.838567781681679, -1.8949525254760922, -1.7131330514384382]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6636291274026576, -2.645156682763968, -2.5521986836263295, -2.102036564943944]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5526757350093354, -1.5163904405142432, -1.532596357176459, -1.4319348286280857]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8730095713940584, -1.879118297391287, -2.466595091273921, -1.7969355276809593]}}