{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:11.310024", "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": "2025-Mar-21_to_2025-Mar-23_181.5_-45.0"}, "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": 2025030002123}, "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 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2025"}, "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": "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": 57130.784325889195}, "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": -45.0}, "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": 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": 180.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 184.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -45.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-179.25, -43.35], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-176.97, -43.47], [-176.82, -43.82], [-176.75, -43.85], [-176.5, -43.75], [-176.25, -43.85], [-176.0, -43.75], [-175.47, -43.97], [-175.25, -44.5], [-175.47, -45.03], [-175.82, -45.18], [-175.97, -45.53], [-176.5, -45.75], [-176.75, -45.65], [-176.82, -45.68], [-176.97, -46.03], [-177.5, -46.25], [-177.75, -46.15], [-178.0, -46.25], [-178.25, -46.15], [-178.5, -46.25], [-178.75, -46.15], [-179.0, -46.25], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.25], [-179.75, -43.35], [-179.5, -43.25], [-179.25, -43.35]]], [[[180.0, -46.04], [179.97, -46.03], [179.75, -45.5], [179.88, -45.2], [179.47, -45.03], [179.25, -44.5], [179.35, -44.25], [179.25, -44.0], [179.47, -43.47], [180.0, -43.25], [180.0, -46.04]]]]}}, "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": {"2025-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[179.25, -44.0], [179.47, -43.47], [180.0, -43.25], [180.0, -46.04], [179.97, -46.03], [179.75, -45.5], [179.88, -45.2], [179.47, -45.03], [179.25, -44.5], [179.35, -44.25], [179.25, -44.0]]], [[[-180.0, -43.25], [-179.75, -43.35], [-179.5, -43.25], [-179.25, -43.35], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-176.97, -43.47], [-176.82, -43.82], [-176.75, -43.85], [-176.5, -43.75], [-176.25, -43.85], [-176.0, -43.75], [-175.47, -43.97], [-175.25, -44.5], [-175.47, -45.03], [-175.82, -45.18], [-175.97, -45.53], [-176.5, -45.75], [-176.75, -45.65], [-176.82, -45.68], [-176.97, -46.03], [-177.5, -46.25], [-177.75, -46.15], [-178.0, -46.25], [-178.25, -46.15], [-178.5, -46.25], [-178.75, -46.15], [-179.0, -46.25], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.25]]]]}, "2025-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[179.25, -44.0], [179.47, -43.47], [180.0, -43.25], [180.0, -46.04], [179.97, -46.03], [179.75, -45.5], [179.88, -45.2], [179.47, -45.03], [179.25, -44.5], [179.35, -44.25], [179.25, -44.0]]], [[[-180.0, -43.25], [-179.75, -43.35], [-179.5, -43.25], [-179.25, -43.35], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-176.97, -43.47], [-176.82, -43.82], [-176.75, -43.85], [-176.5, -43.75], [-176.25, -43.85], [-176.0, -43.75], [-175.47, -43.97], [-175.25, -44.5], [-175.47, -45.03], [-175.82, -45.18], [-175.97, -45.53], [-176.5, -45.75], [-176.75, -45.65], [-176.82, -45.68], [-176.97, -46.03], [-177.5, -46.25], [-177.75, -46.15], [-178.0, -46.25], [-178.25, -46.15], [-178.5, -46.25], [-178.75, -46.15], [-179.0, -46.25], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.25]]]]}, "2025-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[179.25, -44.0], [179.47, -43.47], [180.0, -43.25], [180.0, -46.04], [179.97, -46.03], [179.75, -45.5], [179.88, -45.2], [179.47, -45.03], [179.25, -44.5], [179.35, -44.25], [179.25, -44.0]]], [[[-180.0, -43.25], [-179.75, -43.35], [-179.5, -43.25], [-179.25, -43.35], [-179.0, -43.25], [-178.75, -43.35], [-178.5, -43.25], [-178.25, -43.35], [-178.0, -43.25], [-177.75, -43.35], [-177.5, -43.25], [-176.97, -43.47], [-176.82, -43.82], [-176.75, -43.85], [-176.5, -43.75], [-176.25, -43.85], [-176.0, -43.75], [-175.47, -43.97], [-175.25, -44.5], [-175.47, -45.03], [-175.82, -45.18], [-175.97, -45.53], [-176.5, -45.75], [-176.75, -45.65], [-176.82, -45.68], [-176.97, -46.03], [-177.5, -46.25], [-177.75, -46.15], [-178.0, -46.25], [-178.25, -46.15], [-178.5, -46.25], [-178.75, -46.15], [-179.0, -46.25], [-179.25, -46.15], [-179.5, -46.25], [-180.0, -46.04], [-180.0, -43.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 2.416016809560176}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.101594207674756}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.168050188896018, 16.223984508025353, 16.253275514260338]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.657946523030603, 16.763118998209677, 17.041586812337243]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.060737369607077, 2.0920200367224595, 2.152025216694732]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.1486157294394843, 2.3399380706708257, 2.416016809560176]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.512909880617459, 1.4614289124111604, 1.4211040707143565]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.604556337918725, 1.6643030767115568, 1.514502996451903]}}