{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:21.096031", "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-May-15_to_2025-May-17_87.0_-59.5"}, "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": 2025050001918}, "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": "May 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 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": 86093.62480765957}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Gribb Bank", "Indian Ocean", "Southern 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": -59.5}, "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": 87.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "87.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 81.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 90.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -62.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -59.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[80.25, -62.0], [80.47, -61.47], [81.0, -61.25], [81.25, -61.35], [81.32, -61.32], [81.47, -60.97], [81.82, -60.82], [81.97, -60.47], [82.5, -60.25], [82.75, -60.35], [83.0, -60.25], [83.25, -60.35], [83.5, -60.25], [83.75, -60.35], [84.0, -60.25], [84.25, -60.35], [84.32, -60.32], [84.47, -59.97], [84.82, -59.82], [84.97, -59.47], [85.5, -59.25], [85.75, -59.35], [85.82, -59.32], [85.97, -58.97], [86.5, -58.75], [86.75, -58.85], [86.82, -58.82], [86.97, -58.47], [87.5, -58.25], [87.75, -58.35], [88.0, -58.25], [88.25, -58.35], [88.5, -58.25], [89.03, -58.47], [89.18, -58.82], [89.53, -58.97], [89.75, -59.5], [89.53, -60.03], [89.18, -60.18], [89.15, -60.25], [89.18, -60.32], [89.25, -60.35], [89.5, -60.25], [90.03, -60.47], [90.18, -60.82], [90.53, -60.97], [90.75, -61.5], [90.53, -62.03], [90.0, -62.25], [89.75, -62.15], [89.5, -62.25], [89.25, -62.15], [89.0, -62.25], [88.75, -62.15], [88.5, -62.25], [88.25, -62.15], [88.0, -62.25], [87.75, -62.15], [87.5, -62.25], [86.97, -62.03], [86.82, -61.68], [86.75, -61.65], [86.5, -61.75], [86.25, -61.65], [86.0, -61.75], [85.75, -61.65], [85.68, -61.68], [85.53, -62.03], [85.0, -62.25], [84.75, -62.15], [84.5, -62.25], [84.25, -62.15], [84.0, -62.25], [83.75, -62.15], [83.68, -62.18], [83.53, -62.53], [83.0, -62.75], [82.75, -62.65], [82.5, -62.75], [82.25, -62.65], [82.0, -62.75], [81.75, -62.65], [81.5, -62.75], [81.25, -62.65], [81.0, -62.75], [80.47, -62.53], [80.25, -62.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, -62.75], [80.47, -62.53], [80.25, -62.0], [80.47, -61.47], [81.0, -61.25], [81.25, -61.35], [81.32, -61.32], [81.47, -60.97], [81.82, -60.82], [81.97, -60.47], [82.5, -60.25], [82.75, -60.35], [83.0, -60.25], [83.25, -60.35], [83.5, -60.25], [83.75, -60.35], [84.0, -60.25], [84.25, -60.35], [84.32, -60.32], [84.47, -59.97], [84.82, -59.82], [84.97, -59.47], [85.5, -59.25], [85.75, -59.35], [85.82, -59.32], [85.97, -58.97], [86.5, -58.75], [86.75, -58.85], [86.82, -58.82], [86.97, -58.47], [87.5, -58.25], [87.75, -58.35], [88.0, -58.25], [88.25, -58.35], [88.5, -58.25], [89.03, -58.47], [89.18, -58.82], [89.53, -58.97], [89.75, -59.5], [89.53, -60.03], [89.18, -60.18], [89.15, -60.25], [89.18, -60.32], [89.25, -60.35], [89.5, -60.25], [90.03, -60.47], [90.18, -60.82], [90.53, -60.97], [90.75, -61.5], [90.53, -62.03], [90.0, -62.25], [89.75, -62.15], [89.5, -62.25], [89.25, -62.15], [89.0, -62.25], [88.75, -62.15], [88.5, -62.25], [88.25, -62.15], [88.0, -62.25], [87.75, -62.15], [87.5, -62.25], [86.97, -62.03], [86.82, -61.68], [86.75, -61.65], [86.5, -61.75], [86.25, -61.65], [86.0, -61.75], [85.75, -61.65], [85.68, -61.68], [85.53, -62.03], [85.0, -62.25], [84.75, -62.15], [84.5, -62.25], [84.25, -62.15], [84.0, -62.25], [83.75, -62.15], [83.68, -62.18], [83.53, -62.53], [83.0, -62.75], [82.75, -62.65], [82.5, -62.75], [82.25, -62.65], [82.0, -62.75], [81.75, -62.65], [81.5, -62.75], [81.25, -62.65], [81.0, -62.75]]]]}, "2025-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, -62.75], [80.47, -62.53], [80.25, -62.0], [80.47, -61.47], [81.0, -61.25], [81.25, -61.35], [81.32, -61.32], [81.47, -60.97], [81.82, -60.82], [81.97, -60.47], [82.5, -60.25], [82.75, -60.35], [83.0, -60.25], [83.25, -60.35], [83.5, -60.25], [83.75, -60.35], [84.0, -60.25], [84.25, -60.35], [84.32, -60.32], [84.47, -59.97], [84.82, -59.82], [84.97, -59.47], [85.5, -59.25], [85.75, -59.35], [85.82, -59.32], [85.97, -58.97], [86.5, -58.75], [86.75, -58.85], [86.82, -58.82], [86.97, -58.47], [87.5, -58.25], [87.75, -58.35], [88.0, -58.25], [88.25, -58.35], [88.5, -58.25], [89.03, -58.47], [89.18, -58.82], [89.53, -58.97], [89.75, -59.5], [89.53, -60.03], [89.18, -60.18], [89.15, -60.25], [89.18, -60.32], [89.25, -60.35], [89.5, -60.25], [90.03, -60.47], [90.18, -60.82], [90.53, -60.97], [90.75, -61.5], [90.53, -62.03], [90.0, -62.25], [89.75, -62.15], [89.5, -62.25], [89.25, -62.15], [89.0, -62.25], [88.75, -62.15], [88.5, -62.25], [88.25, -62.15], [88.0, -62.25], [87.75, -62.15], [87.5, -62.25], [86.97, -62.03], [86.82, -61.68], [86.75, -61.65], [86.5, -61.75], [86.25, -61.65], [86.0, -61.75], [85.75, -61.65], [85.68, -61.68], [85.53, -62.03], [85.0, -62.25], [84.75, -62.15], [84.5, -62.25], [84.25, -62.15], [84.0, -62.25], [83.75, -62.15], [83.68, -62.18], [83.53, -62.53], [83.0, -62.75], [82.75, -62.65], [82.5, -62.75], [82.25, -62.65], [82.0, -62.75], [81.75, -62.65], [81.5, -62.75], [81.25, -62.65], [81.0, -62.75]]]]}, "2025-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, -62.75], [80.47, -62.53], [80.25, -62.0], [80.47, -61.47], [81.0, -61.25], [81.25, -61.35], [81.32, -61.32], [81.47, -60.97], [81.82, -60.82], [81.97, -60.47], [82.5, -60.25], [82.75, -60.35], [83.0, -60.25], [83.25, -60.35], [83.5, -60.25], [83.75, -60.35], [84.0, -60.25], [84.25, -60.35], [84.32, -60.32], [84.47, -59.97], [84.82, -59.82], [84.97, -59.47], [85.5, -59.25], [85.75, -59.35], [85.82, -59.32], [85.97, -58.97], [86.5, -58.75], [86.75, -58.85], [86.82, -58.82], [86.97, -58.47], [87.5, -58.25], [87.75, -58.35], [88.0, -58.25], [88.25, -58.35], [88.5, -58.25], [89.03, -58.47], [89.18, -58.82], [89.53, -58.97], [89.75, -59.5], [89.53, -60.03], [89.18, -60.18], [89.15, -60.25], [89.18, -60.32], [89.25, -60.35], [89.5, -60.25], [90.03, -60.47], [90.18, -60.82], [90.53, -60.97], [90.75, -61.5], [90.53, -62.03], [90.0, -62.25], [89.75, -62.15], [89.5, -62.25], [89.25, -62.15], [89.0, -62.25], [88.75, -62.15], [88.5, -62.25], [88.25, -62.15], [88.0, -62.25], [87.75, -62.15], [87.5, -62.25], [86.97, -62.03], [86.82, -61.68], [86.75, -61.65], [86.5, -61.75], [86.25, -61.65], [86.0, -61.75], [85.75, -61.65], [85.68, -61.68], [85.53, -62.03], [85.0, -62.25], [84.75, -62.15], [84.5, -62.25], [84.25, -62.15], [84.0, -62.25], [83.75, -62.15], [83.68, -62.18], [83.53, -62.53], [83.0, -62.75], [82.75, -62.65], [82.5, -62.75], [82.25, -62.65], [82.0, -62.75], [81.75, -62.65], [81.5, -62.75], [81.25, -62.65], [81.0, -62.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.048961903564418}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.887312609174667}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.03791337041133147, 0.6638013025473697, -0.16702071072762692]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.174038187662802, 1.7624412536621321, 0.806282297770224]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.510804342694313, 3.3780038873363365, 2.773129597493351]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.097443378863943, 4.048961903564418, 3.676787878731375]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2374504670580435, 1.6769145133600376, 1.293582288688121]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3764537080745185, 2.051335984799956, 1.4474223854007415]}}