{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:31.360683", "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": "2011-Jan-11_to_2011-Jan-13_181.5_-46.0"}, "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": 2011010000620}, "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 11 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 13 2011"}, "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": 96010.2066118087}, "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": ["New Zealand"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "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": ["South 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": -46.0}, "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": 181.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "181.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 179.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 184.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.97, -45.53], [178.75, -45.0], [178.97, -44.47], [179.5, -44.25], [179.75, -44.35], [179.82, -44.32], [179.97, -43.97], [180.0, -43.96], [180.0, -46.04], [179.97, -46.03], [179.82, -45.68], [179.75, -45.65], [179.5, -45.75], [178.97, -45.53]]], [[[-179.68, -43.82], [-179.53, -43.47], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-177.25, -43.35], [-177.0, -43.25], [-176.75, -43.35], [-176.5, -43.25], [-176.25, -43.35], [-176.18, -43.32], [-176.03, -42.97], [-175.5, -42.75], [-174.97, -42.97], [-174.75, -43.5], [-174.97, -44.03], [-175.32, -44.18], [-175.46, -44.5], [-175.32, -44.82], [-174.97, -44.97], [-174.75, -45.5], [-174.85, -45.75], [-174.75, -46.0], [-174.97, -46.53], [-175.5, -46.75], [-175.75, -46.65], [-176.0, -46.75], [-176.25, -46.65], [-176.32, -46.68], [-176.47, -47.03], [-177.0, -47.25], [-177.25, -47.15], [-177.5, -47.25], [-177.75, -47.15], [-178.0, -47.25], [-178.53, -47.03], [-178.68, -46.68], [-179.03, -46.53], [-179.18, -46.18], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.96], [-179.68, -43.82]]]]}, "2011-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.97, -45.53], [178.75, -45.0], [178.97, -44.47], [179.5, -44.25], [179.75, -44.35], [179.82, -44.32], [179.97, -43.97], [180.0, -43.96], [180.0, -46.04], [179.97, -46.03], [179.82, -45.68], [179.75, -45.65], [179.5, -45.75], [178.97, -45.53]]], [[[-179.68, -43.82], [-179.53, -43.47], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-177.25, -43.35], [-177.0, -43.25], [-176.75, -43.35], [-176.5, -43.25], [-176.25, -43.35], [-176.18, -43.32], [-176.03, -42.97], [-175.5, -42.75], [-174.97, -42.97], [-174.75, -43.5], [-174.97, -44.03], [-175.32, -44.18], [-175.46, -44.5], [-175.32, -44.82], [-174.97, -44.97], [-174.75, -45.5], [-174.85, -45.75], [-174.75, -46.0], [-174.97, -46.53], [-175.5, -46.75], [-175.75, -46.65], [-176.0, -46.75], [-176.25, -46.65], [-176.32, -46.68], [-176.47, -47.03], [-177.0, -47.25], [-177.25, -47.15], [-177.5, -47.25], [-177.75, -47.15], [-178.0, -47.25], [-178.53, -47.03], [-178.68, -46.68], [-179.03, -46.53], [-179.18, -46.18], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.96], [-179.68, -43.82]]]]}, "2011-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.97, -45.53], [178.75, -45.0], [178.97, -44.47], [179.5, -44.25], [179.75, -44.35], [179.82, -44.32], [179.97, -43.97], [180.0, -43.96], [180.0, -46.04], [179.97, -46.03], [179.82, -45.68], [179.75, -45.65], [179.5, -45.75], [178.97, -45.53]]], [[[-179.68, -43.82], [-179.53, -43.47], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-177.25, -43.35], [-177.0, -43.25], [-176.75, -43.35], [-176.5, -43.25], [-176.25, -43.35], [-176.18, -43.32], [-176.03, -42.97], [-175.5, -42.75], [-174.97, -42.97], [-174.75, -43.5], [-174.97, -44.03], [-175.32, -44.18], [-175.46, -44.5], [-175.32, -44.82], [-174.97, -44.97], [-174.75, -45.5], [-174.85, -45.75], [-174.75, -46.0], [-174.97, -46.53], [-175.5, -46.75], [-175.75, -46.65], [-176.0, -46.75], [-176.25, -46.65], [-176.32, -46.68], [-176.47, -47.03], [-177.0, -47.25], [-177.25, -47.15], [-177.5, -47.25], [-177.75, -47.15], [-178.0, -47.25], [-178.53, -47.03], [-178.68, -46.68], [-179.03, -46.53], [-179.18, -46.18], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.96], [-179.68, -43.82]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.113741265302963}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5083472935125646}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.479746076540494, 11.349235855395989, 11.20396013304429]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.80868131580445, 10.116240027423373, 10.05159132673117]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2853882057442405, -2.5047067651149706, -2.734946909678483]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.539980216224137, -2.837589396734927, -3.113741265302963]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4725684463738182, -1.6328370004568633, -1.8469514861858145]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5984349614508762, -1.880728000165814, -2.103761051641562]}}