{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:09.519296", "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-Aug-07_to_2022-Aug-09_202.5_-61.5"}, "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": 2022080000371}, "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 07 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2022"}, "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": 126982.5740276351}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Pacific Ocean", "Pacific-Antarctic Ridge", "Southern Ocean"]}, "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": -61.5}, "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": 202.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "202.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 193.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 206.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -63.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -60.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-165.75, -61.35], [-165.5, -61.25], [-165.25, -61.35], [-165.18, -61.32], [-165.03, -60.97], [-164.5, -60.75], 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regions affected", "value": ["Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.53, -61.47], [-166.0, -61.25], [-165.75, -61.35], [-165.5, -61.25], [-165.25, -61.35], [-165.18, -61.32], [-165.03, -60.97], [-164.5, -60.75], [-164.25, -60.85], [-164.0, -60.75], [-163.75, -60.85], [-163.5, -60.75], [-163.25, -60.85], [-163.18, -60.82], [-163.03, -60.47], [-162.5, -60.25], [-162.25, -60.35], [-162.0, -60.25], [-161.75, -60.35], [-161.5, -60.25], [-161.25, -60.35], [-161.0, -60.25], [-160.75, -60.35], [-160.5, -60.25], [-160.25, -60.35], [-160.0, -60.25], [-159.75, -60.35], [-159.5, -60.25], [-159.25, -60.35], [-159.0, -60.25], [-158.75, -60.35], [-158.5, -60.25], [-158.25, -60.35], [-158.0, -60.25], [-157.75, -60.35], [-157.5, -60.25], [-157.25, -60.35], [-157.0, -60.25], [-156.75, -60.35], [-156.5, -60.25], 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"Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.180974642458011, -14.70742205883397, -14.706086365169199]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.245456383631074, -7.316303492150905, -8.197035320567643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.309121364740975, -9.748137614704888, -10.21961845969713]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9277343119045043, -1.8925170434313072, -2.1079376918551493]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3305564862854444, 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