{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:48.053817", "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": "2026-Jan-12_to_2026-Jan-16_176.0_-13.5"}, "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": 2026010000436}, "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 12 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 68574.60452903407}, "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": ["Fiji"]}, "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": ["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": -13.5}, "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": 176.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "176.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 175.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 179.0}, "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": -13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[174.82, -13.82], [174.97, -13.47], [175.32, -13.32], [175.47, -12.97], [176.0, -12.75], [176.53, -12.97], [176.75, -13.5], [176.63, -13.8], [177.03, -13.97], [177.18, -14.32], [177.53, -14.47], [177.68, -14.82], [177.75, -14.85], [178.0, -14.75], [178.25, -14.85], [178.5, -14.75], [179.03, -14.97], [179.18, -15.32], [179.53, -15.47], [179.75, -16.0], [179.65, -16.25], [179.75, -16.5], [179.53, -17.03], [179.0, -17.25], [178.75, -17.15], [178.5, -17.25], [177.97, -17.03], [177.82, -16.68], [177.75, -16.65], [177.5, -16.75], [177.25, -16.65], [177.0, -16.75], [176.47, -16.53], [176.32, -16.18], [176.25, -16.15], [176.0, -16.25], [175.47, -16.03], [175.32, -15.68], [174.97, -15.53], [174.82, -15.18], [174.47, -15.03], [174.25, -14.5], [174.47, -13.97], [174.82, -13.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[174.47, -15.03], [174.25, -14.5], [174.47, -13.97], [174.82, -13.82], [174.97, -13.47], [175.5, -13.25], [176.03, -13.47], [176.18, -13.82], [176.25, -13.85], [176.5, -13.75], [177.03, -13.97], [177.18, -14.32], [177.53, -14.47], [177.68, -14.82], [177.75, -14.85], [178.0, -14.75], [178.25, -14.85], [178.5, -14.75], [179.03, -14.97], [179.18, -15.32], [179.53, -15.47], [179.75, -16.0], [179.65, -16.25], [179.75, -16.5], [179.53, -17.03], [179.0, -17.25], [178.75, -17.15], [178.5, -17.25], [177.97, -17.03], [177.82, -16.68], [177.75, -16.65], [177.5, -16.75], [177.25, -16.65], [177.0, -16.75], [176.47, -16.53], [176.32, -16.18], [176.25, -16.15], [176.0, -16.25], [175.47, -16.03], [175.32, -15.68], [174.97, -15.53], [174.82, -15.18], [174.47, -15.03]]]]}, "2026-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[174.47, -15.03], [174.25, -14.5], [174.47, -13.97], [174.82, -13.82], [174.97, -13.47], [175.32, -13.32], [175.47, -12.97], [176.0, -12.75], [176.53, -12.97], [176.75, -13.5], [176.63, -13.8], [177.03, -13.97], [177.18, -14.32], [177.53, -14.47], [177.68, -14.82], [177.75, -14.85], [178.0, -14.75], [178.25, -14.85], [178.5, -14.75], [179.03, -14.97], [179.18, -15.32], [179.53, -15.47], [179.75, -16.0], [179.65, -16.25], [179.75, -16.5], [179.53, -17.03], [179.0, -17.25], [178.75, -17.15], [178.5, -17.25], [177.97, -17.03], [177.82, -16.68], [177.75, -16.65], [177.5, -16.75], [177.25, -16.65], [177.0, -16.75], [176.47, -16.53], [176.32, -16.18], [176.25, -16.15], [176.0, -16.25], [175.47, -16.03], [175.32, -15.68], [174.97, -15.53], [174.82, -15.18], [174.47, -15.03]]]]}, "2026-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[174.47, -15.03], [174.25, -14.5], [174.47, -13.97], [174.82, -13.82], [174.97, -13.47], [175.32, -13.32], [175.47, -12.97], [176.0, -12.75], [176.53, -12.97], [176.75, -13.5], [176.63, -13.8], [177.03, -13.97], [177.18, -14.32], [177.53, -14.47], [177.68, -14.82], [177.75, -14.85], [178.0, -14.75], [178.25, -14.85], [178.5, -14.75], [179.03, -14.97], [179.18, -15.32], [179.53, -15.47], [179.75, -16.0], [179.65, -16.25], [179.75, -16.5], [179.53, -17.03], [179.0, -17.25], [178.75, -17.15], [178.5, -17.25], [177.97, -17.03], [177.82, -16.68], [177.75, -16.65], [177.5, -16.75], [177.25, -16.65], [177.0, -16.75], [176.47, -16.53], [176.32, -16.18], [176.25, -16.15], [176.0, -16.25], [175.47, -16.03], [175.32, -15.68], [174.97, -15.53], [174.82, -15.18], [174.47, -15.03]]]]}, "2026-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.47, -12.97], [176.0, -12.75], [176.53, -12.97], [176.75, -13.5], [176.53, -14.03], [176.0, -14.25], [175.47, -14.03], [175.25, -13.5], [175.47, -12.97]]]]}, "2026-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.47, -12.97], [176.0, -12.75], [176.53, -12.97], [176.75, -13.5], [176.53, -14.03], [176.0, -14.25], [175.47, -14.03], [175.25, -13.5], [175.47, -12.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7105184619264264}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0312213859722175}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.066166871966743, 26.08470505424168, 26.28159158679017, 26.604506429036462, 26.566912587483728]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.605983988444052, 24.565085347493493, 25.277529652913415, 26.604506429036462, 26.566912587483728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1065200128173636, -1.1010413676871094, -0.9104153070802271, -0.7719468207768045, -0.806606395647691]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6819790181804137, -1.7105184619264264, -1.1080434177407028, -0.7719468207768045, -0.806606395647691]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8410241306583666, -1.8419889991316816, -1.5436924071409188, -1.327629690598681, -1.476320924878695]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4084574093903917, -2.325079520774066, -1.8750973013940473, -1.327629690598681, -1.476320924878695]}}