{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:23.272945", "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": "2018-Mar-26_to_2018-Mar-30_181.5_-16.5"}, "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": 2018030001041}, "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 26 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 2018"}, "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": 77048.18973046029}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -16.5}, "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": 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": 178.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 183.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.47, -17.53], [178.25, -17.0], [178.47, -16.47], [179.0, 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"2018-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.75, -15.5], [178.97, -14.97], [179.5, -14.75], [180.0, -14.96], [180.0, -17.75], [179.75, -17.65], [179.5, -17.75], [179.25, -17.65], [179.0, -17.75], [178.47, -17.53], [178.25, -17.0], [178.47, -16.47], [178.82, -16.32], [178.96, -16.0], [178.75, -15.5]]], [[[-179.97, -14.97], [-179.82, -15.32], [-179.75, -15.35], [-179.5, -15.25], [-179.25, -15.35], [-179.18, -15.32], [-179.03, -14.97], [-178.5, -14.75], [-177.97, -14.97], [-177.82, -15.32], [-177.47, -15.47], [-177.32, -15.82], [-177.25, -15.85], [-177.0, -15.75], [-176.75, -15.85], [-176.5, -15.75], [-175.97, -15.97], [-175.75, -16.5], [-175.85, -16.75], [-175.75, -17.0], [-175.97, -17.53], [-176.5, -17.75], [-176.75, -17.65], [-177.0, -17.75], [-177.25, -17.65], [-177.5, -17.75], [-177.75, -17.65], [-178.0, -17.75], [-178.25, -17.65], [-178.5, -17.75], [-178.75, -17.65], [-179.0, -17.75], [-179.25, -17.65], [-179.5, -17.75], [-179.75, -17.65], [-180.0, -17.75], [-180.0, -14.96], [-179.97, -14.97]]]]}, "2018-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[178.75, -15.5], [178.97, -14.97], [179.5, -14.75], [180.0, -14.96], [180.0, -17.75], [179.75, -17.65], [179.5, -17.75], [179.25, -17.65], [179.0, -17.75], [178.47, -17.53], [178.25, -17.0], [178.47, -16.47], [178.82, -16.32], [178.96, -16.0], [178.75, -15.5]]], [[[-179.97, -14.97], [-179.82, -15.32], [-179.75, -15.35], [-179.5, -15.25], [-179.25, -15.35], [-179.18, -15.32], [-179.03, -14.97], [-178.5, -14.75], [-177.97, -14.97], [-177.82, -15.32], [-177.47, -15.47], [-177.32, -15.82], [-177.25, -15.85], [-177.0, -15.75], [-176.75, -15.85], [-176.5, -15.75], [-175.97, -15.97], [-175.75, -16.5], [-175.85, -16.75], [-175.75, -17.0], [-175.97, -17.53], [-176.5, -17.75], [-176.75, -17.65], [-177.0, -17.75], [-177.25, -17.65], [-177.5, -17.75], [-177.75, -17.65], [-178.0, -17.75], [-178.25, -17.65], [-178.5, -17.75], [-178.75, -17.65], [-179.0, -17.75], [-179.25, -17.65], [-179.5, -17.75], [-179.75, -17.65], [-180.0, -17.75], [-180.0, -14.96], [-179.97, -14.97]]]]}, "2018-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[179.32, -15.82], [179.47, -15.47], [180.0, -15.25], [180.0, -17.54], [179.5, -17.75], [179.25, -17.65], [179.0, -17.75], [178.47, -17.53], [178.25, -17.0], [178.47, -16.47], [178.82, -16.32], [178.97, -15.97], [179.32, -15.82]]], [[[-179.75, -15.35], [-179.5, -15.25], [-179.25, -15.35], [-179.18, -15.32], [-179.03, -14.97], [-178.5, -14.75], [-177.97, -14.97], [-177.82, -15.32], [-177.47, -15.47], [-177.32, -15.82], [-177.25, -15.85], [-177.0, -15.75], [-176.47, -15.97], [-176.32, -16.32], [-175.97, -16.47], [-175.75, -17.0], [-175.97, -17.53], [-176.5, -17.75], [-176.75, -17.65], [-177.0, -17.75], [-177.25, -17.65], [-177.5, -17.75], [-177.75, -17.65], [-178.0, -17.75], [-178.25, -17.65], [-178.5, -17.75], [-178.75, -17.65], [-179.0, -17.75], [-179.53, -17.53], [-179.7, -17.12], [-179.82, -17.18], [-179.97, -17.53], [-180.0, -17.54], [-180.0, -15.25], [-179.75, -15.35]]]]}, "2018-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[179.5, -15.75], [180.0, -15.96], [180.0, -17.04], [179.5, -17.25], [178.97, -17.03], [178.75, -16.5], [178.97, -15.97], [179.5, -15.75]]], [[[-179.97, -15.97], [-179.75, -16.5], [-179.97, -17.03], [-180.0, -17.04], [-180.0, -15.96], [-179.97, -15.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4493568899961247}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0480268021986885}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.830879028581762, 26.088375666024206, 26.008114190993012, 26.03658589085569, 24.54427365078294]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.53931228325456, 24.75992110492706, 24.614092182966317, 24.503279283262486, 24.54427365078294]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.241872845430837, -0.9383590121303638, -1.0157884259646108, -0.9846728672569692, -1.2218686790335482]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4493568899961247, -1.1534712787624244, -1.2845761555601598, -1.2590628994985877, -1.2218686790335482]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.054362279354012, -1.562902960203451, -1.6757934345618133, -1.588576118275436, -1.7724216623469355]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.394001992651598, -1.8870336719812684, -2.0899566204710087, -1.8153086953248234, -1.7724216623469355]}}