{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-27 23:16:37.451273", "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-Aug-04_to_2026-Aug-08_175.5_-37.0"}, "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": 2026080000198}, "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": "August 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 08 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": 606827.1825999613}, "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", "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": -37.0}, "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": 175.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "175.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 171.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 181.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -41.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[171.35, -35.75], [171.25, -35.5], [171.35, -35.25], [171.25, -35.0], [171.46, -34.5], [171.25, -34.0], [171.47, -33.47], [172.0, -33.25], [172.25, -33.35], [172.32, -33.32], [172.47, -32.97], [173.0, -32.75], [173.25, -32.85], [173.5, -32.75], [174.03, -32.97], [174.18, -33.32], [174.25, -33.35], [174.32, -33.32], [174.47, -32.97], [175.0, -32.75], [175.25, -32.85], [175.32, -32.82], [175.47, -32.47], [176.0, -32.25], [176.25, -32.35], [176.5, -32.25], [176.75, -32.35], [177.0, -32.25], [177.53, -32.47], [177.68, -32.82], [177.75, -32.85], [178.0, -32.75], [178.25, -32.85], [178.5, -32.75], [178.75, -32.85], [178.82, -32.82], [178.97, -32.47], [179.5, -32.25], [179.75, -32.35], [179.82, -32.32], [179.97, -31.97], [180.0, -31.96], [180.0, -37.54], [179.68, -37.68], [179.65, -37.75], [179.75, -38.0], [179.53, -38.53], [179.18, -38.68], [179.03, -39.03], [178.68, -39.18], [178.65, -39.25], [178.75, -39.5], [178.53, -40.03], [178.18, -40.18], [178.15, -40.25], [178.25, -40.5], [178.03, -41.03], [177.68, -41.18], [177.53, -41.53], [177.0, -41.75], [176.75, -41.65], [176.5, -41.75], [176.25, -41.65], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [174.97, -41.53], [174.75, -41.0], [174.85, -40.75], [174.82, -40.68], [174.47, -40.53], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.38, -39.2], [173.25, -39.15], [173.0, -39.25], [172.47, -39.03], [172.32, -38.68], [171.97, -38.53], [171.75, -38.0], [171.85, -37.75], [171.75, -37.5], [171.85, -37.25], [171.82, -37.18], [171.47, -37.03], [171.25, -36.5], [171.35, -36.25], [171.25, -36.0], [171.35, -35.75]]], [[[-179.68, -31.82], [-179.53, -31.47], [-179.0, -31.25], [-178.47, -31.47], [-178.25, -32.0], [-178.35, -32.25], [-178.25, -32.5], [-178.35, -32.75], [-178.25, -33.0], [-178.47, -33.53], [-179.0, -33.75], [-179.3, -33.62], [-179.35, -33.75], [-179.25, -34.0], [-179.47, -34.53], [-179.82, -34.68], [-179.85, -34.75], [-179.75, -35.0], [-179.85, -35.25], [-179.75, -35.5], [-179.85, -35.75], [-179.75, -36.0], [-179.85, -36.25], [-179.75, -36.5], [-179.85, -36.75], [-179.75, -37.0], [-179.97, -37.53], [-180.0, -37.54], [-180.0, -31.96], [-179.68, -31.82]]]]}, "2026-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[171.35, -35.75], [171.25, -35.5], [171.35, -35.25], [171.25, -35.0], [171.46, -34.5], [171.25, -34.0], [171.47, -33.47], [172.0, -33.25], [172.25, -33.35], [172.32, -33.32], [172.47, -32.97], [173.0, -32.75], [173.25, -32.85], [173.5, -32.75], [174.03, -32.97], [174.18, -33.32], [174.25, -33.35], [174.32, -33.32], [174.47, -32.97], [174.82, -32.82], [174.97, -32.47], [175.32, -32.32], [175.47, -31.97], [175.82, -31.82], [175.97, -31.47], [176.5, -31.25], [176.75, -31.35], [176.88, -31.3], [176.75, -31.0], [176.97, -30.47], [177.5, -30.25], [177.75, -30.35], [178.0, -30.25], [178.25, -30.35], [178.5, -30.25], [178.75, -30.35], [179.0, -30.25], [179.25, -30.35], [179.5, -30.25], [179.8, -30.37], [179.85, -30.25], [179.75, -30.0], [179.97, -29.47], [180.0, -29.46], [180.0, -37.54], [179.68, -37.68], [179.65, -37.75], [179.75, -38.0], [179.53, -38.53], [179.18, -38.68], [179.03, -39.03], [178.68, -39.18], [178.65, -39.25], [178.75, -39.5], [178.53, -40.03], [178.18, -40.18], [178.15, -40.25], [178.25, -40.5], [178.03, -41.03], [177.68, -41.18], [177.53, -41.53], [177.0, -41.75], [176.75, -41.65], [176.5, -41.75], [176.25, -41.65], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [174.97, -41.53], [174.75, -41.0], [174.85, -40.75], [174.82, -40.68], [174.47, -40.53], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.38, -39.2], [173.25, -39.15], [173.0, -39.25], [172.47, -39.03], [172.32, -38.68], [171.97, -38.53], [171.75, -38.0], [171.85, -37.75], [171.75, -37.5], [171.85, -37.25], [171.82, -37.18], [171.47, -37.03], [171.25, -36.5], [171.35, -36.25], [171.25, -36.0], [171.35, -35.75]], [[179.68, -31.68], [179.65, -31.75], [179.68, -31.82], [179.8, -31.87], [179.85, -31.75], [179.8, -31.62], [179.68, -31.68]]], [[[-179.5, -29.25], [-178.97, -29.47], [-178.75, -30.0], [-178.85, -30.25], [-178.82, -30.32], [-178.75, -30.35], [-178.5, -30.25], [-177.97, -30.47], [-177.75, -31.0], [-177.85, -31.25], [-177.75, -31.5], [-177.85, -31.75], [-177.75, -32.0], [-177.97, -32.53], [-178.32, -32.68], [-178.35, -32.75], [-178.25, -33.0], [-178.47, -33.53], [-179.0, -33.75], [-179.3, -33.62], [-179.35, -33.75], [-179.25, -34.0], [-179.47, -34.53], [-179.82, -34.68], [-179.85, -34.75], [-179.75, -35.0], [-179.85, -35.25], [-179.75, -35.5], [-179.85, -35.75], [-179.75, -36.0], [-179.85, -36.25], [-179.75, -36.5], [-179.85, -36.75], [-179.75, -37.0], [-179.97, -37.53], [-180.0, -37.54], [-180.0, -29.46], [-179.5, -29.25]]]]}, "2026-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[171.35, -35.75], [171.25, -35.5], [171.35, -35.25], [171.25, -35.0], [171.46, -34.5], [171.25, -34.0], [171.47, -33.47], [172.0, -33.25], [172.25, -33.35], [172.32, -33.32], [172.47, -32.97], [173.0, -32.75], [173.25, -32.85], [173.5, -32.75], [174.03, -32.97], [174.18, -33.32], [174.25, -33.35], [174.32, -33.32], [174.47, -32.97], [174.82, -32.82], [174.97, -32.47], [175.32, -32.32], [175.47, -31.97], [175.82, -31.82], [175.97, -31.47], [176.5, -31.25], [176.75, -31.35], [176.88, -31.3], [176.75, -31.0], [176.97, -30.47], [177.5, -30.25], [177.75, -30.35], [178.0, -30.25], [178.25, -30.35], [178.5, -30.25], [178.75, -30.35], [179.0, -30.25], [179.25, -30.35], [179.5, -30.25], [179.8, -30.37], [179.85, -30.25], [179.75, -30.0], [179.97, -29.47], [180.0, -29.46], [180.0, -37.54], [179.68, -37.68], [179.65, -37.75], [179.75, -38.0], [179.53, -38.53], [179.18, -38.68], [179.03, -39.03], [178.68, -39.18], [178.65, -39.25], [178.75, -39.5], [178.53, -40.03], [178.18, -40.18], [178.15, -40.25], [178.25, -40.5], [178.03, -41.03], [177.68, -41.18], [177.53, -41.53], [177.0, -41.75], [176.75, -41.65], [176.5, -41.75], [176.25, -41.65], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [174.97, -41.53], [174.75, -41.0], [174.85, -40.75], [174.82, -40.68], [174.47, -40.53], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.38, -39.2], [173.25, -39.15], [173.0, -39.25], [172.47, -39.03], [172.32, -38.68], [171.97, -38.53], [171.75, -38.0], [171.85, -37.75], [171.75, -37.5], [171.85, -37.25], [171.82, -37.18], [171.47, -37.03], [171.25, -36.5], [171.35, -36.25], [171.25, -36.0], [171.35, -35.75]], [[179.68, -31.68], [179.65, -31.75], [179.68, -31.82], [179.8, -31.87], [179.85, -31.75], [179.8, -31.62], [179.68, -31.68]]], [[[-179.5, -29.25], [-178.97, -29.47], [-178.75, -30.0], [-178.85, -30.25], [-178.82, -30.32], [-178.75, -30.35], [-178.5, -30.25], [-177.97, -30.47], [-177.75, -31.0], [-177.85, -31.25], [-177.75, -31.5], [-177.85, -31.75], [-177.75, -32.0], [-177.97, -32.53], [-178.32, -32.68], [-178.35, -32.75], [-178.25, -33.0], [-178.47, -33.53], [-179.0, -33.75], [-179.3, -33.62], [-179.35, -33.75], [-179.25, -34.0], [-179.47, -34.53], [-179.82, -34.68], [-179.85, -34.75], [-179.75, -35.0], [-179.85, -35.25], [-179.75, -35.5], [-179.85, -35.75], [-179.75, -36.0], [-179.85, -36.25], [-179.75, -36.5], [-179.85, -36.75], [-179.75, -37.0], [-179.97, -37.53], [-180.0, -37.54], [-180.0, -29.46], [-179.5, -29.25]]]]}, "2026-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.97, -37.03], [173.75, -36.5], [173.97, -35.97], [174.5, -35.75], [174.8, -35.87], [174.96, -35.5], [174.75, -35.0], [174.85, -34.75], [174.75, -34.5], [174.85, -34.25], [174.75, -34.0], [174.85, -33.75], [174.75, -33.5], [174.85, -33.25], [174.75, -33.0], [174.97, -32.47], [175.32, -32.32], [175.47, -31.97], [175.82, -31.82], [175.97, -31.47], [176.5, -31.25], [176.75, -31.35], [176.88, -31.3], [176.75, -31.0], [176.97, -30.47], [177.5, -30.25], [177.75, -30.35], [178.0, -30.25], [178.25, -30.35], [178.5, -30.25], [178.75, -30.35], [179.0, -30.25], [179.25, -30.35], [179.5, -30.25], [179.8, -30.37], [179.85, -30.25], [179.75, -30.0], [179.97, -29.47], [180.0, -29.46], [180.0, -36.04], [179.68, -36.18], [179.53, -36.53], [179.0, -36.75], [178.75, -36.65], [178.68, -36.68], [178.53, -37.03], [178.18, -37.18], [178.13, -37.3], [178.25, -37.35], [178.5, -37.25], [179.03, -37.47], [179.25, -38.0], [179.15, -38.25], [179.25, -38.5], [179.03, -39.03], [178.68, -39.18], [178.53, -39.53], [178.0, -39.75], [177.75, -39.65], [177.68, -39.68], [177.53, -40.03], [177.0, -40.25], [176.47, -40.03], [176.32, -39.68], [175.97, -39.53], [175.82, -39.18], [175.75, -39.15], [175.5, -39.25], [174.97, -39.03], [174.75, -38.5], [174.85, -38.25], [174.75, -38.0], [174.85, -37.75], [174.75, -37.5], [174.85, -37.25], [174.8, -37.12], [174.5, -37.25], [173.97, -37.03]], [[179.68, -31.68], [179.65, -31.75], [179.68, -31.82], [179.8, -31.87], [179.85, -31.75], [179.8, -31.62], [179.68, -31.68]]], [[[-179.5, -29.25], [-178.97, -29.47], [-178.75, -30.0], [-178.85, -30.25], [-178.82, -30.32], [-178.75, -30.35], [-178.5, -30.25], [-177.97, -30.47], [-177.75, -31.0], [-177.85, -31.25], [-177.75, -31.5], [-177.85, -31.75], [-177.75, -32.0], [-177.97, -32.53], [-178.32, -32.68], [-178.35, -32.75], [-178.25, -33.0], [-178.47, -33.53], [-179.0, -33.75], [-179.3, -33.62], [-179.35, -33.75], [-179.25, -34.0], [-179.47, -34.53], [-179.82, -34.68], [-179.85, -34.75], [-179.75, -35.0], [-179.85, -35.25], [-179.75, -35.5], [-179.97, -36.03], [-180.0, -36.04], [-180.0, -29.46], [-179.5, -29.25]]]]}, "2026-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[177.85, -32.25], [177.75, -32.0], [177.85, -31.75], [177.75, -31.5], [177.97, -30.97], [178.32, -30.82], [178.47, -30.47], [179.0, -30.25], [179.25, -30.35], [179.5, -30.25], [179.8, -30.37], [179.85, -30.25], [179.75, -30.0], [179.97, -29.47], [180.0, -29.46], [180.0, -34.25], [179.75, -34.15], [179.5, -34.25], [179.25, -34.15], [179.0, -34.25], [178.47, -34.03], [178.32, -33.68], [177.97, -33.53], [177.75, -33.0], [177.85, -32.75], [177.75, -32.5], [177.85, -32.25]], [[179.85, -31.75], [179.8, -31.62], [179.68, -31.68], [179.65, -31.75], [179.68, -31.82], [179.8, -31.87], [179.85, -31.75]]], [[[-179.5, -29.25], [-178.97, -29.47], [-178.75, -30.0], [-178.85, -30.25], [-178.82, -30.32], [-178.75, -30.35], [-178.5, -30.25], [-177.97, -30.47], [-177.75, -31.0], [-177.85, -31.25], [-177.75, -31.5], [-177.85, -31.75], [-177.75, -32.0], [-177.97, -32.53], [-178.32, -32.68], [-178.35, -32.75], [-178.25, -33.0], [-178.47, -33.53], [-179.0, -33.75], [-179.3, -33.62], [-179.47, -34.03], [-180.0, -34.25], [-180.0, -29.46], [-179.5, -29.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.780401550932083}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6669715779380003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.9889035232668, 10.417033541760873, 10.688224731529317, 11.860942205749382, 13.49951171875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.257449849446573, -0.6870127360026004, -0.869328562418616, 2.2255353291829465, 12.800561523437523]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9132939591426394, -2.917508181271371, -2.578534986792293, -2.1041188305452345, -2.1714757215004057]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.389478163409365, -7.780401550932083, -7.074573564892262, -4.2142623281352485, -2.74579352866283]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.183888362962985, -2.2346898819801453, -1.8797509997045312, -1.6969765602409381, -2.0199690439444025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.7138147958755408, -3.614768995276467, -3.307937252541289, -2.49789741355056, -2.5401636328841644]}}