{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:06.841148", "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-Apr-22_to_2025-Apr-27_127.5_-15.0"}, "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": 2025040000460}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 157706.50227446618}, "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": ["Australia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": ["Indian Ocean", "Timor 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": -15.0}, "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": 127.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, -17.03], [126.25, -16.5], [126.47, -15.97], [127.0, -15.75], [127.53, -15.97], [127.75, -16.5], [127.53, -17.03], [127.0, -17.25], [126.47, -17.03]]], [[[129.03, -15.97], [129.25, -16.5], [129.03, -17.03], [128.5, -17.25], [127.97, -17.03], [127.75, -16.5], [127.97, -15.97], [128.5, -15.75], [129.03, -15.97]]]]}, "2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, -16.25], [124.75, -16.0], [124.85, -15.75], [124.75, -15.5], [124.97, -14.97], [125.32, -14.82], [125.47, -14.47], [125.82, -14.32], [125.97, -13.97], [126.32, -13.82], [126.47, -13.47], [127.0, -13.25], [127.53, -13.47], [127.68, -13.82], [128.03, -13.97], [128.18, -14.32], [128.5, -14.46], [129.0, -14.25], [129.25, -14.35], [129.32, -14.32], [129.47, -13.97], [130.0, -13.75], [130.53, -13.97], [130.68, -14.32], [131.03, -14.47], [131.25, -15.0], [131.03, -15.53], [130.68, -15.68], [130.53, -16.03], [130.18, -16.18], [130.15, -16.25], [130.25, -16.5], [130.15, -16.75], [130.25, -17.0], [130.03, -17.53], [129.5, -17.75], [129.25, -17.65], [129.0, -17.75], [128.75, -17.65], [128.5, -17.75], [128.25, -17.65], [128.0, -17.75], [127.75, -17.65], [127.5, -17.75], [127.25, -17.65], [127.0, -17.75], [126.47, -17.53], [126.32, -17.18], [126.25, -17.15], [126.18, -17.18], [126.03, -17.53], [125.5, -17.75], [124.97, -17.53], [124.75, -17.0], [124.85, -16.75], [124.75, -16.5], [124.85, -16.25]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, -16.25], [124.75, -16.0], [124.85, -15.75], [124.75, -15.5], [124.85, -15.25], [124.75, -15.0], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [126.0, -13.75], [126.25, -13.85], [126.32, -13.82], [126.47, -13.47], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.5, -14.46], [129.0, -14.25], [129.25, -14.35], [129.32, -14.32], [129.47, -13.97], [130.0, -13.75], [130.53, -13.97], [130.68, -14.32], [131.03, -14.47], [131.25, -15.0], [131.03, -15.53], [130.68, -15.68], [130.53, -16.03], [130.18, -16.18], [130.15, -16.25], [130.25, -16.5], [130.15, -16.75], [130.25, -17.0], [130.03, -17.53], [129.5, -17.75], [129.25, -17.65], [129.0, -17.75], [128.75, -17.65], [128.5, -17.75], [128.25, -17.65], [128.0, -17.75], [127.75, -17.65], [127.5, -17.75], [127.25, -17.65], [127.0, -17.75], [126.47, -17.53], [126.32, -17.18], [126.25, -17.15], [126.18, -17.18], [126.03, -17.53], [125.5, -17.75], [124.97, -17.53], [124.75, -17.0], [124.85, -16.75], [124.75, -16.5], [124.85, -16.25]]]]}, "2025-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, -16.25], [124.75, -16.0], [124.85, -15.75], [124.75, -15.5], [124.85, -15.25], [124.75, -15.0], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [126.0, -13.75], [126.25, -13.85], [126.32, -13.82], [126.47, -13.47], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.5, -14.46], [129.0, -14.25], [129.25, -14.35], [129.32, -14.32], [129.47, -13.97], [130.0, -13.75], [130.53, -13.97], [130.68, -14.32], [131.03, -14.47], [131.25, -15.0], [131.03, -15.53], [130.68, -15.68], [130.53, -16.03], [130.18, -16.18], [130.15, -16.25], [130.25, -16.5], [130.15, -16.75], [130.25, -17.0], [130.03, -17.53], [129.5, -17.75], [129.25, -17.65], [129.0, -17.75], [128.75, -17.65], [128.5, -17.75], [128.25, -17.65], [128.0, -17.75], [127.75, -17.65], [127.5, -17.75], [127.25, -17.65], [127.0, -17.75], [126.47, -17.53], [126.32, -17.18], [126.25, -17.15], [126.18, -17.18], [126.03, -17.53], [125.5, -17.75], [124.97, -17.53], [124.75, -17.0], [124.85, -16.75], [124.75, -16.5], [124.85, -16.25]]]]}, "2025-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [126.0, -13.75], [126.25, -13.85], [126.32, -13.82], [126.47, -13.47], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.5, -14.46], [129.0, -14.25], [129.25, -14.35], [129.32, -14.32], [129.47, -13.97], [130.0, -13.75], [130.53, -13.97], [130.75, -14.5], [130.53, -15.03], [130.18, -15.18], [130.03, -15.53], [129.68, -15.68], [129.53, -16.03], [129.18, -16.18], [129.15, -16.25], [129.25, -16.5], [129.03, -17.03], [128.5, -17.25], [128.25, -17.15], [128.0, -17.25], [127.75, -17.15], [127.5, -17.25], [127.25, -17.15], [127.0, -17.25], [126.75, -17.15], [126.5, -17.25], [125.97, -17.03], [125.75, -16.5], [125.85, -16.25], [125.82, -16.18], [125.75, -16.15], [125.5, -16.25], [124.97, -16.03], [124.75, -15.5], [124.85, -15.25], [124.75, -15.0], [124.85, -14.75]]]]}, "2025-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.82, -14.32], [125.97, -13.97], [126.32, -13.82], [126.47, -13.47], [127.0, -13.25], [127.53, -13.47], [127.75, -14.0], [127.65, -14.25], [127.68, -14.32], [128.03, -14.47], [128.25, -15.0], [128.15, -15.25], [128.18, -15.32], [128.53, -15.47], [128.75, -16.0], [128.53, -16.53], [128.0, -16.75], [127.75, -16.65], [127.68, -16.68], [127.53, -17.03], [127.0, -17.25], [126.75, -17.15], [126.5, -17.25], [125.97, -17.03], [125.75, -16.5], [125.85, -16.25], [125.82, -16.18], [125.75, -16.15], [125.5, -16.25], [124.97, -16.03], [124.75, -15.5], [124.97, -14.97], [125.32, -14.82], [125.47, -14.47], [125.82, -14.32]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.635522332350831}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7665617015382735}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.23601430257162, 23.11096442605367, 22.46120862181084, 23.169017470257813, 23.854142910826454, 23.29650113141099]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.49187367757162, 21.32801208496096, 20.290184275309286, 21.01440582275393, 21.881570434570335, 22.157725270589196]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.567665230887769, -3.876816962517298, -4.507503730677323, -3.7177144001311437, -3.0458831965819, -2.9230802433190552]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6139919914774623, -5.640099857438315, -6.635522332350831, -5.75371978799302, -4.54007532633176, -3.390060754381068]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3219288765939246, -2.2283611875948894, -2.614302735715541, -2.1058292734425033, -1.8008830724088585, -1.6423279386942191]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3734805260593146, -3.0776802132017447, -3.5574956697115305, -2.954534339783802, -2.4745436752259264, -1.8168567690007351]}}