{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:42.764370", "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": "2012-Jun-29_to_2012-Jul-02_174.5_-39.5"}, "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": 2012060001452}, "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": "June 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 02 2012"}, "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": 51027.191084081715}, "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"]}, "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", "Tasman Sea"]}, "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": -39.5}, "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": 174.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "174.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 173.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 178.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-06-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.75, -38.0], [173.97, -37.47], [174.5, -37.25], [175.03, -37.47], [175.25, -38.0], [175.15, -38.25], [175.2, -38.37], [175.32, -38.32], [175.47, -37.97], [175.82, -37.82], [175.85, -37.75], [175.75, -37.5], [175.97, -36.97], [176.32, -36.82], [176.47, -36.47], [177.0, -36.25], [177.25, -36.35], [177.32, -36.32], [177.47, -35.97], [178.0, -35.75], [178.53, -35.97], [178.68, -36.32], [179.03, -36.47], [179.25, -37.0], [179.03, -37.53], [178.68, -37.68], [178.53, -38.03], [178.0, -38.25], [177.75, -38.15], [177.68, -38.18], [177.53, -38.53], [177.0, -38.75], [176.75, -38.65], [176.68, -38.68], [176.53, -39.03], [176.18, -39.18], [176.15, -39.25], [176.25, -39.5], [176.03, -40.03], [175.5, -40.25], [174.97, -40.03], [174.75, -39.5], [174.85, -39.25], [174.8, -39.12], [174.68, -39.18], [174.53, -39.53], [174.0, -39.75], [173.47, -39.53], [173.25, -39.0], [173.47, -38.47], [173.82, -38.32], [173.85, -38.25], [173.75, -38.0]]]]}, "2012-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.82, -38.32], [173.85, -38.25], [173.75, -38.0], [173.97, -37.47], [174.5, -37.25], [175.03, -37.47], [175.25, -38.0], [175.15, -38.25], [175.2, -38.37], [175.32, -38.32], [175.47, -37.97], [175.82, -37.82], [175.85, -37.75], [175.75, -37.5], [175.97, -36.97], [176.32, -36.82], [176.47, -36.47], [177.0, -36.25], [177.25, -36.35], [177.32, -36.32], [177.47, -35.97], [178.0, -35.75], [178.53, -35.97], [178.68, -36.32], [179.03, -36.47], [179.25, -37.0], [179.03, -37.53], [178.68, -37.68], [178.53, -38.03], [178.0, -38.25], [177.75, -38.15], [177.68, -38.18], [177.53, -38.53], [177.0, -38.75], [176.75, -38.65], [176.68, -38.68], [176.53, -39.03], [176.18, -39.18], [176.15, -39.25], [176.25, -39.5], [176.03, -40.03], [175.68, -40.18], [175.53, -40.53], [175.0, -40.75], [174.47, -40.53], [174.32, -40.18], [174.0, -40.04], [173.5, -40.25], [172.97, -40.03], [172.75, -39.5], [172.97, -38.97], [173.32, -38.82], [173.47, -38.47], [173.82, -38.32]]]]}, "2012-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.82, -38.32], [173.85, -38.25], [173.75, -38.0], [173.97, -37.47], [174.5, -37.25], [175.03, -37.47], [175.25, -38.0], [175.15, -38.25], [175.2, -38.37], [175.32, -38.32], [175.47, -37.97], [175.82, -37.82], [175.85, -37.75], [175.75, -37.5], [175.97, -36.97], [176.32, -36.82], [176.47, -36.47], [177.0, -36.25], [177.25, -36.35], [177.32, -36.32], [177.47, -35.97], [178.0, -35.75], [178.53, -35.97], [178.68, -36.32], [179.03, -36.47], [179.25, -37.0], [179.03, -37.53], [178.68, -37.68], [178.53, -38.03], [178.0, -38.25], [177.75, -38.15], [177.68, -38.18], [177.53, -38.53], [177.0, -38.75], [176.75, -38.65], [176.68, -38.68], [176.53, -39.03], [176.18, -39.18], [176.15, -39.25], [176.25, -39.5], [176.03, -40.03], [175.68, -40.18], [175.53, -40.53], [175.0, -40.75], [174.47, -40.53], [174.32, -40.18], [174.0, -40.04], [173.5, -40.25], [172.97, -40.03], [172.75, -39.5], [172.97, -38.97], [173.32, -38.82], [173.47, -38.47], [173.82, -38.32]]]]}, "2012-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[172.97, -40.03], [172.75, -39.5], [172.97, -38.97], [173.5, -38.75], [174.0, -38.96], [174.5, -38.75], [174.75, -38.85], [175.0, -38.75], [175.53, -38.97], [175.75, -39.5], [175.65, -39.75], [175.75, -40.0], [175.53, -40.53], [175.0, -40.75], [174.47, -40.53], [174.32, -40.18], [174.0, -40.04], [173.5, -40.25], [172.97, -40.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.823649014860393}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.961002988246514}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.740991239784194, 8.045723598218217, 8.055245315791183, 6.0305870787793765]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.008568886689602, 0.18047648688769868, 0.8585915363351546, 2.4959078472263627]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6845095697162065, -3.044673007000367, -3.0047513121434366, -3.4671537180837504]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.3596153230227515, -5.224077047571541, -5.823649014860393, -4.5944384251828865]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4492935361204848, -1.566921870253393, -1.5560614152948862, -1.5626800693233276]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6153128640929284, -1.7513056092758719, -2.147736771659134, -1.6892487244606444]}}