{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:46.603129", "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-Mar-19_to_2023-Mar-24_166.5_-17.5"}, "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": 2023030000646}, "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": "March 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 24 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": 142089.02821171185}, "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": ["Vanuatu"]}, "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": ["Coral Sea", "Loyalty Basin", "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": -17.5}, "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": 166.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "166.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 163.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 169.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[168.18, -18.18], [168.03, -18.53], [167.5, -18.75], [167.25, -18.65], [167.0, -18.75], [166.75, -18.65], [166.5, 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.0, -18.25], [165.47, -18.03], [165.25, -17.5], [165.47, -16.97], [166.0, -16.75], [166.25, -16.85], [166.5, -16.75], [166.75, -16.85], [167.0, -16.75], [167.25, -16.85], [167.5, -16.75], [167.75, -16.85], [168.0, -16.75], [168.53, -16.97], [168.75, -17.5], [168.53, -18.03], [168.18, -18.18], [168.03, -18.53], [167.5, -18.75], [166.97, -18.53], [166.82, -18.18], [166.75, -18.15], [166.5, -18.25], [166.25, -18.15], [166.0, -18.25]]]]}, "2023-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[164.5, -18.25], [163.97, -18.03], [163.75, -17.5], [163.97, -16.97], [164.5, -16.75], [164.75, -16.85], [165.0, -16.75], [165.25, -16.85], [165.5, -16.75], [165.75, -16.85], [165.82, -16.82], [165.85, -16.75], [165.75, -16.5], [165.97, -15.97], [166.5, -15.75], [166.75, -15.85], 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anomaly over entire duration", "value": -1.0762267160986045}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.126975549942983, 26.062671500483646, 26.227206109037184, 26.067149613840456, 26.021461938221876, 26.097533516618853]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.021273622723356, 25.760609937435618, 25.974466272784696, 25.4721281115406, 25.35812278466875, 25.436181748488764]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9677177001280199, -1.0570213486714835, -0.9377066190036977, -1.1159866935661142, -1.1534933051879932, -1.0863419597248907]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0272700801590418, -1.3358989156228063, -1.1177230615984968, -1.4088748040990708, -1.5062807930641497, -1.456490711710103]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6344020335367926, -1.8380613378627975, -1.6679398931875662, -1.9653782416696288, -2.0110126924462244, -1.923210166539833]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.727819414273773, -2.3126026699210827, -1.970559676433673, -2.5727507885365504, -2.7181775655991935, -2.606081292306543]}}