{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:46.683186", "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-04_to_2023-Aug-09_101.0_18.0"}, "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": 2023080000204}, "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 04 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 227686.67793072242}, "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": ["Lao People's Democratic Republic", "Myanmar", "Thailand", "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": 18.0}, "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": 101.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "101.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[105.03, 19.03], [105.25, 18.5], [105.03, 17.97], [104.5, 17.75], [104.25, 17.85], [104.18, 17.82], [104.15, 17.75], 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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": {"2023-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.25, 17.5], [102.47, 18.03], [102.82, 18.18], [102.85, 18.25], [102.75, 18.5], [102.97, 19.03], [103.5, 19.25], [103.75, 19.15], [104.0, 19.25], [104.25, 19.15], [104.5, 19.25], [105.03, 19.03], [105.25, 18.5], [105.03, 17.97], [104.5, 17.75], [104.25, 17.85], [104.18, 17.82], [104.15, 17.75], [104.25, 17.5], [104.15, 17.25], [104.25, 17.0], [104.03, 16.47], [103.5, 16.25], [102.97, 16.47], [102.82, 16.82], [102.47, 16.97], [102.25, 17.5]]], [[[101.0, 17.25], [100.47, 17.47], [100.25, 18.0], [100.47, 18.53], [101.0, 18.75], [101.53, 18.53], [101.75, 18.0], [101.53, 17.47], [101.0, 17.25]]]]}, "2023-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.25, 18.5], [99.35, 18.75], [99.25, 19.0], 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