{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:19.170692", "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": "2024-Mar-29_to_2024-Mar-31_179.0_-37.5"}, "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": 2024030000546}, "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 29 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2024"}, "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": 72843.8511871988}, "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"]}, "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": -37.5}, "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": 179.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "179.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 176.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 180.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[176.25, -38.0], [176.47, -37.47], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [177.82, -37.32], [177.97, -36.97], [178.32, -36.82], [178.35, -36.75], [178.25, -36.5], [178.47, -35.97], [179.0, -35.75], [179.25, -35.85], [179.32, -35.82], [179.47, -35.47], [180.0, -35.25], [180.0, -40.25], [179.75, -40.15], [179.68, -40.18], [179.65, -40.25], [179.75, -40.5], [179.53, -41.03], [179.0, -41.25], [178.47, -41.03], [178.32, -40.68], [177.97, -40.53], [177.75, -40.0], [177.97, -39.47], [178.32, -39.32], [178.35, -39.25], [178.32, -39.18], [178.25, -39.15], [178.0, -39.25], [177.75, -39.15], [177.5, -39.25], [176.97, -39.03], [176.82, -38.68], [176.47, -38.53], [176.25, -38.0]]], [[[-179.47, -35.47], [-179.25, -36.0], [-179.35, -36.25], [-179.25, -36.5], [-179.47, -37.03], [-179.82, -37.18], [-179.85, -37.25], [-179.82, -37.32], [-179.47, -37.47], [-179.25, -38.0], [-179.46, -38.5], [-179.25, -39.0], [-179.35, -39.25], [-179.25, -39.5], [-179.47, -40.03], [-180.0, -40.25], [-180.0, -35.25], [-179.47, -35.47]]]]}, "2024-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[176.25, -38.0], [176.47, -37.47], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [177.82, -37.32], [177.97, -36.97], [178.32, -36.82], [178.35, -36.75], [178.25, -36.5], [178.47, -35.97], [179.0, -35.75], [179.25, -35.85], [179.32, -35.82], [179.47, -35.47], [180.0, -35.25], [180.0, -40.25], [179.75, -40.15], [179.68, -40.18], [179.65, -40.25], [179.75, -40.5], [179.53, -41.03], [179.0, -41.25], [178.47, -41.03], [178.32, -40.68], [177.97, -40.53], [177.75, -40.0], [177.97, -39.47], [178.32, -39.32], [178.35, -39.25], [178.32, -39.18], [178.25, -39.15], [178.0, -39.25], [177.75, -39.15], [177.5, -39.25], [176.97, -39.03], [176.82, -38.68], [176.47, -38.53], [176.25, -38.0]]], [[[-179.47, -35.47], [-179.25, -36.0], [-179.35, -36.25], [-179.25, -36.5], [-179.47, -37.03], [-179.82, -37.18], [-179.85, -37.25], [-179.82, -37.32], [-179.47, -37.47], [-179.25, -38.0], [-179.46, -38.5], [-179.25, -39.0], [-179.35, -39.25], [-179.25, -39.5], [-179.47, -40.03], [-180.0, -40.25], [-180.0, -35.25], [-179.47, -35.47]]]]}, "2024-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[176.25, -38.0], [176.47, -37.47], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [177.82, -37.32], [177.97, -36.97], [178.32, -36.82], [178.35, -36.75], [178.25, -36.5], [178.47, -35.97], [179.0, -35.75], [179.25, -35.85], [179.32, -35.82], [179.47, -35.47], [180.0, -35.25], [180.0, -40.25], [179.75, -40.15], [179.68, -40.18], [179.65, -40.25], [179.75, -40.5], [179.53, -41.03], [179.0, -41.25], [178.47, -41.03], [178.32, -40.68], [177.97, -40.53], [177.75, -40.0], [177.97, -39.47], [178.32, -39.32], [178.35, -39.25], [178.32, -39.18], [178.25, -39.15], [178.0, -39.25], [177.75, -39.15], [177.5, -39.25], [176.97, -39.03], [176.82, -38.68], [176.47, -38.53], [176.25, -38.0]]], [[[-179.47, -35.47], [-179.25, -36.0], [-179.35, -36.25], [-179.25, -36.5], [-179.47, -37.03], [-179.82, -37.18], [-179.85, -37.25], [-179.82, -37.32], [-179.47, -37.47], [-179.25, -38.0], [-179.46, -38.5], [-179.25, -39.0], [-179.35, -39.25], [-179.25, -39.5], [-179.47, -40.03], [-180.0, -40.25], [-180.0, -35.25], [-179.47, -35.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.43374172997045}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2872996991775825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.022442972939814, 14.717470813700231, 15.295814994788657]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.820663632980768, 9.129979583374848, 8.988752187223554]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.662889949182018, -2.913809026440985, -2.2852001219097438]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.43374172997045, -4.30456176916465, -4.059079995055299]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.9464152932926058, -1.8474773714815316, -1.4074887826099496]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.3128765890890466, -2.536722740551944, -1.6854311450846524]}}