{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:42.535569", "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": "2023-Apr-09_to_2023-Apr-12_178.5_-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": 2023040001703}, "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": "April 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2023"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 52981.68392472192}, "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"]}, "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": ["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": -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": 178.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "178.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 176.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 181.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -40.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[179.0, -38.25], [179.25, -38.35], [179.32, -38.32], [179.47, -37.97], [180.0, -37.75], [180.0, -39.75], [179.75, -39.65], [179.68, -39.68], [179.53, -40.03], [179.0, -40.25], [178.75, -40.15], [178.68, -40.18], [178.53, -40.53], [178.0, -40.75], [177.47, -40.53], [177.32, -40.18], [176.97, -40.03], [176.82, -39.68], [176.75, -39.65], [176.5, -39.75], [175.97, -39.53], [175.75, -39.0], [175.85, -38.75], [175.82, -38.68], [175.47, -38.53], [175.25, -38.0], [175.47, -37.47], [176.0, -37.25], [176.25, -37.35], [176.5, -37.25], [176.75, -37.35], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [178.0, -37.25], [178.53, -37.47], [178.75, -38.0], [178.63, -38.3], [178.75, -38.35], [179.0, -38.25]]], [[[-179.0, -38.25], [-178.47, -38.47], [-178.25, -39.0], [-178.47, -39.53], [-179.0, -39.75], [-179.25, -39.65], [-179.5, -39.75], [-179.75, -39.65], [-180.0, -39.75], [-180.0, -37.75], [-179.47, -37.97], [-179.32, -38.32], [-179.25, -38.35], [-179.0, -38.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.47, -38.53], [175.25, -38.0], [175.47, -37.47], [176.0, -37.25], [176.25, -37.35], [176.5, -37.25], [176.75, -37.35], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [178.0, -37.25], [178.53, -37.47], [178.75, -38.0], [178.53, -38.53], [178.18, -38.68], [178.03, -39.03], [177.68, -39.18], [177.53, -39.53], [177.0, -39.75], [176.75, -39.65], [176.5, -39.75], [175.97, -39.53], [175.75, -39.0], [175.85, -38.75], [175.82, -38.68], [175.47, -38.53]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.47, -38.53], [175.25, -38.0], [175.47, -37.47], [176.0, -37.25], [176.25, -37.35], [176.5, -37.25], [176.75, -37.35], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [178.0, -37.25], [178.53, -37.47], [178.75, -38.0], [178.63, -38.3], [178.75, -38.35], [179.0, -38.25], [179.25, -38.35], [179.32, -38.32], [179.47, -37.97], [180.0, -37.75], [180.0, -39.75], [179.75, -39.65], [179.68, -39.68], [179.53, -40.03], [179.0, -40.25], [178.75, -40.15], [178.68, -40.18], [178.53, -40.53], [178.0, -40.75], [177.47, -40.53], [177.32, -40.18], [176.97, -40.03], [176.82, -39.68], [176.75, -39.65], [176.5, -39.75], [175.97, -39.53], [175.75, -39.0], [175.85, -38.75], [175.82, -38.68], [175.47, -38.53]]], [[[-180.0, -37.75], [-179.47, -37.97], [-179.32, -38.32], [-179.25, -38.35], [-179.0, -38.25], [-178.47, -38.47], [-178.25, -39.0], [-178.47, -39.53], [-179.0, -39.75], [-179.25, -39.65], [-179.5, -39.75], [-179.75, -39.65], [-180.0, -39.75], [-180.0, -37.75]]]]}, "2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[175.47, -38.53], [175.25, -38.0], [175.47, -37.47], [176.0, -37.25], [176.25, -37.35], [176.5, -37.25], [176.75, -37.35], [177.0, -37.25], [177.25, -37.35], [177.5, -37.25], [177.75, -37.35], [178.0, -37.25], [178.53, -37.47], [178.75, -38.0], [178.63, -38.3], [178.75, -38.35], [179.0, -38.25], [179.25, -38.35], [179.32, -38.32], [179.47, -37.97], [180.0, -37.75], [180.0, -39.75], [179.75, -39.65], [179.68, -39.68], [179.53, -40.03], [179.0, -40.25], [178.75, -40.15], [178.68, -40.18], [178.53, -40.53], [178.0, -40.75], [177.47, -40.53], [177.32, -40.18], [176.97, -40.03], [176.82, -39.68], [176.75, -39.65], [176.5, -39.75], [175.97, -39.53], [175.75, -39.0], [175.85, -38.75], [175.82, -38.68], [175.47, -38.53]]], [[[-180.0, -37.75], [-179.47, -37.97], [-179.32, -38.32], [-179.25, -38.35], [-179.0, -38.25], [-178.47, -38.47], [-178.25, -39.0], [-178.47, -39.53], [-179.0, -39.75], [-179.25, -39.65], [-179.5, -39.75], [-179.75, -39.65], [-180.0, -39.75], [-180.0, -37.75]]]]}, "2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[176.97, -40.03], [176.75, -39.5], [176.97, -38.97], [177.5, -38.75], [177.75, -38.85], [177.82, -38.82], [177.97, -38.47], [178.5, -38.25], [178.75, -38.35], [179.0, -38.25], [179.25, -38.35], [179.32, -38.32], [179.47, -37.97], [180.0, -37.75], [180.0, -39.75], [179.75, -39.65], [179.68, -39.68], [179.53, -40.03], [179.0, -40.25], [178.75, -40.15], [178.68, -40.18], [178.53, -40.53], [178.0, -40.75], [177.47, -40.53], [177.32, -40.18], [176.97, -40.03]]], [[[-180.0, -37.75], [-179.47, -37.97], [-179.32, -38.32], [-179.25, -38.35], [-179.0, -38.25], [-178.47, -38.47], [-178.25, -39.0], [-178.47, -39.53], [-179.0, -39.75], [-179.25, -39.65], [-179.5, -39.75], [-179.75, -39.65], [-180.0, -39.75], [-180.0, -37.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.727004993583023}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.970867675730506}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.38358500860204, 18.168488124053113, 17.89126736511929, 18.831664990398224]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.74955473965582, 19.809276529975534, 19.529230373585676, 19.132682656612417]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.518042583194659, 3.1592897297112135, 2.998383459827659, 2.1190025497009657]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.9010954715872685, 4.726514920418197, 4.727004993583023, 2.3233247527455205]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.398937697317524, 1.5793225891805287, 1.5252808403736202, 1.357291352970921]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4583883494918406, 1.7992295767715907, 1.7676187392707992, 1.4912395973880808]}}