{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:55.142025", "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-Jan-29_to_2022-Feb-01_147.5_0.5"}, "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": 2022010001102}, "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 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 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": 108143.94754696752}, "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": ["Papua New Guinea"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": ["Bismarck Sea", "Pacific 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": 0.5}, "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": 147.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "147.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 150.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[149.75, -1.35], [150.0, -1.25], [150.53, -1.47], [150.75, -2.0], [150.53, -2.53], [150.18, -2.68], [150.03, -3.03], 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{"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, 1.0], [145.85, 1.25], [145.75, 1.5], [145.97, 2.03], [146.5, 2.25], [146.75, 2.15], [147.0, 2.25], [147.25, 2.15], [147.5, 2.25], [147.8, 2.13], [147.97, 2.53], [148.5, 2.75], [149.03, 2.53], [149.25, 2.0], [149.15, 1.75], [149.25, 1.5], [149.15, 1.25], [149.25, 1.0], [149.03, 0.47], [148.68, 0.32], [148.53, -0.03], [148.18, -0.18], [148.15, -0.25], [148.25, -0.5], [148.04, -1.0], [148.18, -1.32], [148.25, -1.35], [148.5, -1.25], [148.75, -1.35], [149.0, -1.25], [149.53, -1.47], [149.68, -1.82], [150.03, -1.97], [150.25, -2.5], [150.03, -3.03], [149.68, -3.18], [149.53, -3.53], [149.0, -3.75], [148.75, -3.65], [148.5, -3.75], [147.97, -3.53], [147.75, 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daily evolution of maximum t2m.", "value": [26.052494190806726, 25.892239447790985, 25.873605175347336, 26.265158433900467]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8729470464927658, -0.908063783411699, -1.07020394842535, -0.9412619554163845]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9764360278169306, -1.0647236611607696, -1.3167743927217543, -1.179429587585048]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.39143661100659, -1.4399731735867525, -1.7120315765834029, -1.5042873572657047]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6148768264465059, -1.6303275137870732, -2.0569296847105165, -1.8847767889582576]}}