{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:32.815437", "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": "2018-Apr-18_to_2018-Apr-21_141.5_41.5"}, "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": 2018040002195}, "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 18 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 21 2018"}, "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": 59720.020924992015}, "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": ["Japan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Japan Sea", "North 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": 41.5}, "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": 141.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "141.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 139.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 144.25}, "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": 43.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.25, 42.15], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [141.75, 42.15], [142.0, 42.25], [142.25, 42.15], [142.5, 42.25], [143.03, 42.03], [143.25, 41.5], [143.03, 40.97], [142.5, 40.75], [142.25, 40.85], [142.0, 40.75], [141.75, 40.85], [141.5, 40.75], [141.25, 40.85], [141.0, 40.75], [140.75, 40.85], [140.5, 40.75], [140.25, 40.85], [140.18, 40.82], [140.03, 40.47], [139.5, 40.25], [138.97, 40.47], [138.75, 41.0], [138.97, 41.53], [139.32, 41.68], [139.47, 42.03], [140.0, 42.25], [140.25, 42.15]]], [[[143.25, 42.0], [143.47, 42.53], [144.0, 42.75], [144.53, 42.53], [144.75, 42.0], [144.53, 41.47], [144.0, 41.25], [143.47, 41.47], [143.25, 42.0]]], [[[139.75, 43.5], [139.97, 44.03], [140.5, 44.25], [141.03, 44.03], [141.25, 43.5], [141.03, 42.97], [140.5, 42.75], [139.97, 42.97], [139.75, 43.5]]]]}, "2018-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.97, 42.03], [139.5, 42.25], [139.75, 42.15], [139.88, 42.2], [139.82, 42.32], [139.47, 42.47], [139.25, 43.0], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], [141.0, 44.25], [141.25, 44.15], [141.5, 44.25], [142.03, 44.03], [142.25, 43.5], [142.13, 43.2], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.25, 42.65], [143.5, 42.75], [143.75, 42.65], [144.0, 42.75], [144.53, 42.53], [144.75, 42.0], [144.53, 41.47], [144.0, 41.25], [143.75, 41.35], [143.5, 41.25], [143.25, 41.35], [143.18, 41.32], [143.03, 40.97], [142.5, 40.75], [142.25, 40.85], [142.18, 40.82], [142.03, 40.47], [141.5, 40.25], [141.25, 40.35], [141.0, 40.25], [140.5, 40.46], [140.0, 40.25], [139.75, 40.35], [139.5, 40.25], [138.97, 40.47], [138.75, 41.0], [138.85, 41.25], [138.75, 41.5], [138.97, 42.03]]]]}, "2018-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.97, 42.03], [139.5, 42.25], [139.75, 42.15], [139.88, 42.2], [139.82, 42.32], [139.47, 42.47], [139.25, 43.0], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], 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8.447105069685733, 8.732325313258627, 10.011786659901418]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.80621340685883, 11.132556746368493, 11.833724061870157, 14.656426490459012]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.2687887500616046, 3.443165884318994, 3.6091813821791425, 4.762491994383601]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.22667605592784, 5.1220292834080965, 5.545022247167651, 6.827129232460834]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5234542720534852, 1.6820109682613733, 1.7579098399996864, 2.3069333239085745]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7428505091362645, 1.9205421101630418, 2.2595127436495304, 2.8913224089659577]}}