{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:11.061466", "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": "2015-Jan-11_to_2015-Jan-16_141.0_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": 2015010002158}, "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": "January 11 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2015"}, "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": "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": 51000.615563115396}, "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": 141.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "141.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 139.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 143.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.97, 43.03], [141.5, 43.25], [142.03, 43.03], [142.18, 42.68], [142.53, 42.53], [142.75, 42.0], [142.53, 41.47], [142.0, 41.25], [141.75, 41.35], [141.5, 41.25], [140.97, 41.47], [140.75, 42.0], [140.85, 42.25], [140.75, 42.5], [140.97, 43.03]]]]}, "2015-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [140.0, 42.75], [140.25, 42.65], [140.5, 42.75], [140.75, 42.65], [140.82, 42.68], [140.97, 43.03], [141.5, 43.25], [142.03, 43.03], [142.18, 42.68], [142.53, 42.53], [142.68, 42.18], [143.03, 42.03], [143.25, 41.5], [143.03, 40.97], [142.68, 40.82], [142.53, 40.47], [142.0, 40.25], [141.75, 40.35], [141.5, 40.25], [141.25, 40.35], [141.18, 40.32], [141.03, 39.97], [140.5, 39.75], [139.97, 39.97], [139.82, 40.32], [139.47, 40.47], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75]]]]}, "2015-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [140.0, 42.75], [140.25, 42.65], [140.5, 42.75], 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[139.46, 40.5], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75]]]]}, "2015-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.97, 42.03], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [142.03, 42.03], [142.25, 41.5], [142.03, 40.97], [141.68, 40.82], [141.53, 40.47], [141.0, 40.25], [140.57, 40.43], [140.75, 40.0], [140.53, 39.47], [140.0, 39.25], [139.47, 39.47], [139.25, 40.0], [139.47, 40.53], [140.0, 40.75], [140.43, 40.57], [140.32, 40.82], [139.97, 40.97], [139.75, 41.5], [139.97, 42.03]]], [[[142.47, 40.47], [142.25, 41.0], [142.47, 41.53], [143.0, 41.75], [143.53, 41.53], [143.75, 41.0], [143.53, 40.47], [143.0, 40.25], [142.47, 40.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 5.257516447429737}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.7908547576886003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.5847984469775156, 2.3182509551455723, 2.6638310502299305, 3.6823329518931587, 2.777295944806781, 2.7684650527493773]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.015222667258115, 3.870248702973356, 4.328618175353029, 5.734702052649709, 4.550429405266129, 4.141485993225444]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.0506473708117974, 3.6045446383073263, 3.6629069846980156, 4.650621013505648, 3.4929700603040468, 3.0791508130863954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.3684663157295063, 4.058973216039988, 4.319396632934513, 5.257516447429737, 4.105684701327505, 3.22617630132288]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3255712078305988, 1.5810762982915085, 1.6810110810563201, 2.1169274808155656, 1.5776643978531908, 1.38360643273349]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4125776039719622, 1.7803830503912639, 2.015760032031248, 2.4562562487367527, 1.9340060649930826, 1.41811909847891]}}